diff --git a/Documentation/devicetree/bindings/rtc/amlogic,meson-vrtc.yaml b/Documentation/devicetree/bindings/rtc/amlogic,meson-vrtc.yaml
new file mode 100644
index 0000000000000..a89865fa676a6
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/amlogic,meson-vrtc.yaml
@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/amlogic,meson-vrtc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Amlogic Virtual RTC (VRTC)
+
+maintainers:
+ - Neil Armstrong <neil.armstrong@linaro.org>
+
+description: |
+ This is a Linux interface to an RTC managed by firmware, hence it's
+ virtual from a Linux perspective. The interface is 1 register where
+ an alarm time (in seconds) is to be written.
+ The alarm register is a simple scratch register shared between the
+ application processors (AP) and the secure co-processor (SCP.) When
+ the AP suspends, the SCP will use the value of this register to
+ program an always-on timer before going sleep. When the timer expires,
+ the SCP will wake up and will then wake the AP.
+
+allOf:
+ - $ref: rtc.yaml#
+
+properties:
+ compatible:
+ enum:
+ - amlogic,meson-vrtc
+
+ reg:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ rtc@a8 {
+ compatible = "amlogic,meson-vrtc";
+ reg = <0x000a8 0x4>;
+ };
diff --git a/Documentation/devicetree/bindings/rtc/brcm,brcmstb-waketimer.yaml b/Documentation/devicetree/bindings/rtc/brcm,brcmstb-waketimer.yaml
index 9fe079917a986..c6c57636c729e 100644
--- a/Documentation/devicetree/bindings/rtc/brcm,brcmstb-waketimer.yaml
+++ b/Documentation/devicetree/bindings/rtc/brcm,brcmstb-waketimer.yaml
@@ -11,7 +11,8 @@ maintainers:
description:
The Broadcom STB wake-up timer provides a 27Mhz resolution timer, with the
- ability to wake up the system from low-power suspend/standby modes.
+ ability to wake up the system from low-power suspend/standby modes and
+ optionally generate RTC alarm interrupts.
allOf:
- $ref: "rtc.yaml#"
@@ -24,8 +25,14 @@ properties:
maxItems: 1
interrupts:
- description: the TIMER interrupt
- maxItems: 1
+ minItems: 1
+ items:
+ - description: the TIMER interrupt
+ - description: the ALARM interrupt
+ description:
+ The TIMER interrupt wakes the system from low-power suspend/standby modes.
+ An ALARM interrupt may be specified to interrupt the CPU when an RTC alarm
+ is enabled.
clocks:
description: clock reference in the 27MHz domain
@@ -35,10 +42,10 @@ additionalProperties: false
examples:
- |
- rtc@f0411580 {
+ rtc@f041a080 {
compatible = "brcm,brcmstb-waketimer";
- reg = <0xf0411580 0x14>;
- interrupts = <0x3>;
- interrupt-parent = <&aon_pm_l2_intc>;
+ reg = <0xf041a080 0x14>;
+ interrupts-extended = <&aon_pm_l2_intc 0x04>,
+ <&upg_aux_aon_intr2_intc 0x08>;
clocks = <&upg_fixed>;
};
diff --git a/Documentation/devicetree/bindings/rtc/ingenic,rtc.yaml b/Documentation/devicetree/bindings/rtc/ingenic,rtc.yaml
index af78b67b3da4d..de9879bdb3175 100644
--- a/Documentation/devicetree/bindings/rtc/ingenic,rtc.yaml
+++ b/Documentation/devicetree/bindings/rtc/ingenic,rtc.yaml
@@ -11,6 +11,17 @@ maintainers:
allOf:
- $ref: rtc.yaml#
+ - if:
+ not:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - ingenic,jz4770-rtc
+ - ingenic,jz4780-rtc
+ then:
+ properties:
+ "#clock-cells": false
properties:
compatible:
@@ -39,6 +50,9 @@ properties:
clock-names:
const: rtc
+ "#clock-cells":
+ const: 0
+
system-power-controller:
description: |
Indicates that the RTC is responsible for powering OFF
@@ -83,3 +97,18 @@ examples:
clocks = <&cgu JZ4740_CLK_RTC>;
clock-names = "rtc";
};
+
+ - |
+ #include <dt-bindings/clock/ingenic,jz4780-cgu.h>
+ rtc: rtc@10003000 {
+ compatible = "ingenic,jz4780-rtc", "ingenic,jz4760-rtc";
+ reg = <0x10003000 0x4c>;
+
+ interrupt-parent = <&intc>;
+ interrupts = <32>;
+
+ clocks = <&cgu JZ4780_CLK_RTCLK>;
+ clock-names = "rtc";
+
+ #clock-cells = <0>;
+ };
diff --git a/Documentation/devicetree/bindings/rtc/microcrystal,rv3028.yaml b/Documentation/devicetree/bindings/rtc/microcrystal,rv3028.yaml
new file mode 100644
index 0000000000000..5ade5dfad048a
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/microcrystal,rv3028.yaml
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/microcrystal,rv3028.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip RV-3028 RTC
+
+allOf:
+ - $ref: rtc.yaml#
+
+maintainers:
+ - Alexandre Belloni <alexandre.belloni@bootlin.com>
+
+properties:
+ compatible:
+ const: microcrystal,rv3028
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ trickle-resistor-ohms:
+ enum:
+ - 3000
+ - 5000
+ - 9000
+ - 15000
+
+required:
+ - compatible
+ - reg
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ rtc@51 {
+ compatible = "microcrystal,rv3028";
+ reg = <0x51>;
+ pinctrl-0 = <&rtc_nint_pins>;
+ interrupts-extended = <&gpio1 16 IRQ_TYPE_LEVEL_HIGH>;
+ trickle-resistor-ohms = <3000>;
+ };
+ };
+
+...
diff --git a/Documentation/devicetree/bindings/rtc/moxa,moxart-rtc.txt b/Documentation/devicetree/bindings/rtc/moxa,moxart-rtc.txt
index c9d3ac1477feb..1374df7bf9d69 100644
--- a/Documentation/devicetree/bindings/rtc/moxa,moxart-rtc.txt
+++ b/Documentation/devicetree/bindings/rtc/moxa,moxart-rtc.txt
@@ -3,15 +3,15 @@ MOXA ART real-time clock
Required properties:
- compatible : Should be "moxa,moxart-rtc"
-- gpio-rtc-sclk : RTC sclk gpio, with zero flags
-- gpio-rtc-data : RTC data gpio, with zero flags
-- gpio-rtc-reset : RTC reset gpio, with zero flags
+- rtc-sclk-gpios : RTC sclk gpio, with zero flags
+- rtc-data-gpios : RTC data gpio, with zero flags
+- rtc-reset-gpios : RTC reset gpio, with zero flags
Example:
rtc: rtc {
compatible = "moxa,moxart-rtc";
- gpio-rtc-sclk = <&gpio 5 0>;
- gpio-rtc-data = <&gpio 6 0>;
- gpio-rtc-reset = <&gpio 7 0>;
+ rtc-sclk-gpios = <&gpio 5 0>;
+ rtc-data-gpios = <&gpio 6 0>;
+ rtc-reset-gpios = <&gpio 7 0>;
};
diff --git a/Documentation/devicetree/bindings/rtc/nxp,pcf2127.yaml b/Documentation/devicetree/bindings/rtc/nxp,pcf2127.yaml
index cde7b1675ead4..a1148eb22c245 100644
--- a/Documentation/devicetree/bindings/rtc/nxp,pcf2127.yaml
+++ b/Documentation/devicetree/bindings/rtc/nxp,pcf2127.yaml
@@ -14,7 +14,10 @@ maintainers:
properties:
compatible:
- const: nxp,pcf2127
+ enum:
+ - nxp,pca2129
+ - nxp,pcf2127
+ - nxp,pcf2129
reg:
maxItems: 1
diff --git a/Documentation/devicetree/bindings/rtc/nxp,pcf85363.yaml b/Documentation/devicetree/bindings/rtc/nxp,pcf85363.yaml
new file mode 100644
index 0000000000000..52aa3e2091e92
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/nxp,pcf85363.yaml
@@ -0,0 +1,60 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/nxp,pcf85363.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Philips PCF85263/PCF85363 Real Time Clock
+
+maintainers:
+ - Alexandre Belloni <alexandre.belloni@bootlin.com>
+
+allOf:
+ - $ref: rtc.yaml#
+
+properties:
+ compatible:
+ enum:
+ - nxp,pcf85263
+ - nxp,pcf85363
+
+ reg:
+ maxItems: 1
+
+ "#clock-cells":
+ const: 0
+
+ clock-output-names:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ quartz-load-femtofarads:
+ description:
+ The capacitive load of the quartz(x-tal).
+ enum: [6000, 7000, 12500]
+ default: 7000
+
+ start-year: true
+ wakeup-source: true
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ rtc@51 {
+ compatible = "nxp,pcf85363";
+ reg = <0x51>;
+ #clock-cells = <0>;
+ quartz-load-femtofarads = <12500>;
+ };
+ };
diff --git a/Documentation/devicetree/bindings/rtc/nxp,pcf8563.yaml b/Documentation/devicetree/bindings/rtc/nxp,pcf8563.yaml
index a98b72752349f..22909a96123e5 100644
--- a/Documentation/devicetree/bindings/rtc/nxp,pcf8563.yaml
+++ b/Documentation/devicetree/bindings/rtc/nxp,pcf8563.yaml
@@ -19,8 +19,6 @@ properties:
- microcrystal,rv8564
- nxp,pca8565
- nxp,pcf8563
- - nxp,pcf85263
- - nxp,pcf85363
reg:
maxItems: 1
diff --git a/Documentation/devicetree/bindings/rtc/qcom-pm8xxx-rtc.yaml b/Documentation/devicetree/bindings/rtc/qcom-pm8xxx-rtc.yaml
index 21c8ea08ff0a2..b95a69cc9ae0f 100644
--- a/Documentation/devicetree/bindings/rtc/qcom-pm8xxx-rtc.yaml
+++ b/Documentation/devicetree/bindings/rtc/qcom-pm8xxx-rtc.yaml
@@ -40,6 +40,16 @@ properties:
description:
Indicates that the setting of RTC time is allowed by the host CPU.
+ nvmem-cells:
+ items:
+ - description:
+ four-byte nvmem cell holding a little-endian offset from the Unix
+ epoch representing the time when the RTC timer was last reset
+
+ nvmem-cell-names:
+ items:
+ - const: offset
+
wakeup-source: true
required:
@@ -69,6 +79,8 @@ examples:
compatible = "qcom,pm8921-rtc";
reg = <0x11d>;
interrupts = <0x27 0>;
+ nvmem-cells = <&rtc_offset>;
+ nvmem-cell-names = "offset";
};
};
};
diff --git a/Documentation/devicetree/bindings/rtc/rtc-meson-vrtc.txt b/Documentation/devicetree/bindings/rtc/rtc-meson-vrtc.txt
deleted file mode 100644
index c014f54a98530..0000000000000
--- a/Documentation/devicetree/bindings/rtc/rtc-meson-vrtc.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-* Amlogic Virtual RTC (VRTC)
-
-This is a Linux interface to an RTC managed by firmware, hence it's
-virtual from a Linux perspective. The interface is 1 register where
-an alarm time (in seconds) is to be written.
-
-Required properties:
-- compatible: should be "amlogic,meson-vrtc"
-- reg: physical address for the alarm register
-
-The alarm register is a simple scratch register shared between the
-application processors (AP) and the secure co-processor (SCP.) When
-the AP suspends, the SCP will use the value of this register to
-program an always-on timer before going sleep. When the timer expires,
-the SCP will wake up and will then wake the AP.
-
-Example:
-
- vrtc: rtc@0a8 {
- compatible = "amlogic,meson-vrtc";
- reg = <0x0 0x000a8 0x0 0x4>;
- };
diff --git a/Documentation/devicetree/bindings/rtc/trivial-rtc.yaml b/Documentation/devicetree/bindings/rtc/trivial-rtc.yaml
index d9fc120c61cc3..eb75861c28c32 100644
--- a/Documentation/devicetree/bindings/rtc/trivial-rtc.yaml
+++ b/Documentation/devicetree/bindings/rtc/trivial-rtc.yaml
@@ -47,14 +47,12 @@ properties:
- isil,isl1218
# Intersil ISL12022 Real-time Clock
- isil,isl12022
- # Real Time Clock Module with I2C-Bus
- - microcrystal,rv3028
+ # Loongson-2K Socs/LS7A bridge Real-time Clock
+ - loongson,ls2x-rtc
# Real Time Clock Module with I2C-Bus
- microcrystal,rv3029
# Real Time Clock
- microcrystal,rv8523
- - nxp,pca2129
- - nxp,pcf2129
# Real-time Clock Module
- pericom,pt7c4338
# I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 2ba72de0fa471..5a71579af0a14 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -1677,7 +1677,7 @@ config RTC_DRV_MPC5121
config RTC_DRV_JZ4740
tristate "Ingenic JZ4740 SoC"
depends on MIPS || COMPILE_TEST
- depends on OF
+ depends on OF && COMMON_CLK
help
If you say yes here you get support for the Ingenic JZ47xx SoCs RTC
controllers.
@@ -1773,6 +1773,18 @@ config RTC_DRV_SNVS
This driver can also be built as a module, if so, the module
will be called "rtc-snvs".
+config RTC_DRV_BBNSM
+ tristate "NXP BBNSM RTC support"
+ select REGMAP_MMIO
+ depends on ARCH_MXC || COMPILE_TEST
+ depends on HAS_IOMEM
+ depends on OF
+ help
+ If you say yes here you get support for the NXP BBNSM RTC module.
+
+ This driver can also be built as a module, if so, the module
+ will be called "rtc-bbnsm".
+
config RTC_DRV_IMX_SC
depends on IMX_SCU
depends on HAVE_ARM_SMCCC
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 59eb302893355..ea445d1ebb172 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -33,6 +33,7 @@ obj-$(CONFIG_RTC_DRV_ASPEED) += rtc-aspeed.o
obj-$(CONFIG_RTC_DRV_AT91RM9200)+= rtc-at91rm9200.o
obj-$(CONFIG_RTC_DRV_AT91SAM9) += rtc-at91sam9.o
obj-$(CONFIG_RTC_DRV_AU1XXX) += rtc-au1xxx.o
+obj-$(CONFIG_RTC_DRV_BBNSM) += rtc-nxp-bbnsm.o
obj-$(CONFIG_RTC_DRV_BD70528) += rtc-bd70528.o
obj-$(CONFIG_RTC_DRV_BQ32K) += rtc-bq32k.o
obj-$(CONFIG_RTC_DRV_BQ4802) += rtc-bq4802.o
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index 7c30cb3c764d8..499d89150afc9 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -392,7 +392,7 @@ int rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)
return err;
if (!rtc->ops) {
err = -ENODEV;
- } else if (!test_bit(RTC_FEATURE_ALARM, rtc->features) || !rtc->ops->read_alarm) {
+ } else if (!test_bit(RTC_FEATURE_ALARM, rtc->features)) {
err = -EINVAL;
} else {
memset(alarm, 0, sizeof(struct rtc_wkalrm));
diff --git a/drivers/rtc/rtc-ab-eoz9.c b/drivers/rtc/rtc-ab-eoz9.c
index 2f8deb8c4cd3e..34611f6dedcba 100644
--- a/drivers/rtc/rtc-ab-eoz9.c
+++ b/drivers/rtc/rtc-ab-eoz9.c
@@ -536,9 +536,14 @@ static int abeoz9_probe(struct i2c_client *client)
clear_bit(RTC_FEATURE_ALARM, data->rtc->features);
if (client->irq > 0) {
+ unsigned long irqflags = IRQF_TRIGGER_LOW;
+
+ if (dev_fwnode(&client->dev))
+ irqflags = 0;
+
ret = devm_request_threaded_irq(dev, client->irq, NULL,
abeoz9_rtc_irq,
- IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ irqflags | IRQF_ONESHOT,
dev_name(dev), dev);
if (ret) {
dev_err(dev, "failed to request alarm irq\n");
diff --git a/drivers/rtc/rtc-abx80x.c b/drivers/rtc/rtc-abx80x.c
index 2e0e6432901b8..f34a2e59cac76 100644
--- a/drivers/rtc/rtc-abx80x.c
+++ b/drivers/rtc/rtc-abx80x.c
@@ -11,6 +11,7 @@
*/
#include <linux/bcd.h>
+#include <linux/bitfield.h>
#include <linux/i2c.h>
#include <linux/kstrtox.h>
#include <linux/module.h>
@@ -88,6 +89,16 @@
#define ABX8XX_TRICKLE_STANDARD_DIODE 0x8
#define ABX8XX_TRICKLE_SCHOTTKY_DIODE 0x4
+#define ABX8XX_REG_EXTRAM 0x3f
+#define ABX8XX_EXTRAM_XADS GENMASK(1, 0)
+
+#define ABX8XX_SRAM_BASE 0x40
+#define ABX8XX_SRAM_WIN_SIZE 0x40
+#define ABX8XX_RAM_SIZE 256
+
+#define NVMEM_ADDR_LOWER GENMASK(5, 0)
+#define NVMEM_ADDR_UPPER GENMASK(7, 6)
+
static u8 trickle_resistors[] = {0, 3, 6, 11};
enum abx80x_chip {AB0801, AB0803, AB0804, AB0805,
@@ -674,6 +685,68 @@ static int abx80x_setup_watchdog(struct abx80x_priv *priv)
}
#endif
+static int abx80x_nvmem_xfer(struct abx80x_priv *priv, unsigned int offset,
+ void *val, size_t bytes, bool write)
+{
+ int ret;
+
+ while (bytes) {
+ u8 extram, reg, len, lower, upper;
+
+ lower = FIELD_GET(NVMEM_ADDR_LOWER, offset);
+ upper = FIELD_GET(NVMEM_ADDR_UPPER, offset);
+ extram = FIELD_PREP(ABX8XX_EXTRAM_XADS, upper);
+ reg = ABX8XX_SRAM_BASE + lower;
+ len = min(lower + bytes, (size_t)ABX8XX_SRAM_WIN_SIZE) - lower;
+ len = min_t(u8, len, I2C_SMBUS_BLOCK_MAX);
+
+ ret = i2c_smbus_write_byte_data(priv->client, ABX8XX_REG_EXTRAM,
+ extram);
+ if (ret)
+ return ret;
+
+ if (write)
+ ret = i2c_smbus_write_i2c_block_data(priv->client, reg,
+ len, val);
+ else
+ ret = i2c_smbus_read_i2c_block_data(priv->client, reg,
+ len, val);
+ if (ret)
+ return ret;
+
+ offset += len;
+ val += len;
+ bytes -= len;
+ }
+
+ return 0;
+}
+
+static int abx80x_nvmem_read(void *priv, unsigned int offset, void *val,
+ size_t bytes)
+{
+ return abx80x_nvmem_xfer(priv, offset, val, bytes, false);
+}
+
+static int abx80x_nvmem_write(void *priv, unsigned int offset, void *val,
+ size_t bytes)
+{
+ return abx80x_nvmem_xfer(priv, offset, val, bytes, true);
+}
+
+static int abx80x_setup_nvmem(struct abx80x_priv *priv)
+{
+ struct nvmem_config config = {
+ .type = NVMEM_TYPE_BATTERY_BACKED,
+ .reg_read = abx80x_nvmem_read,
+ .reg_write = abx80x_nvmem_write,
+ .size = ABX8XX_RAM_SIZE,
+ .priv = priv,
+ };
+
+ return devm_rtc_nvmem_register(priv->rtc, &config);
+}
+
static const struct i2c_device_id abx80x_id[] = {
{ "abx80x", ABX80X },
{ "ab0801", AB0801 },
@@ -840,6 +913,10 @@ static int abx80x_probe(struct i2c_client *client)
return err;
}
+ err = abx80x_setup_nvmem(priv);
+ if (err)
+ return err;
+
if (client->irq > 0) {
dev_info(&client->dev, "IRQ %d supplied\n", client->irq);
err = devm_request_threaded_irq(&client->dev, client->irq, NULL,
diff --git a/drivers/rtc/rtc-brcmstb-waketimer.c b/drivers/rtc/rtc-brcmstb-waketimer.c
index c74130e8f496d..1efa81cecc273 100644
--- a/drivers/rtc/rtc-brcmstb-waketimer.c
+++ b/drivers/rtc/rtc-brcmstb-waketimer.c
@@ -27,13 +27,17 @@ struct brcmstb_waketmr {
struct rtc_device *rtc;
struct device *dev;
void __iomem *base;
- int irq;
+ unsigned int wake_irq;
+ unsigned int alarm_irq;
struct notifier_block reboot_notifier;
struct clk *clk;
u32 rate;
+ unsigned long rtc_alarm;
+ bool alarm_en;
};
#define BRCMSTB_WKTMR_EVENT 0x00
+#define WKTMR_ALARM_EVENT BIT(0)
#define BRCMSTB_WKTMR_COUNTER 0x04
#define BRCMSTB_WKTMR_ALARM 0x08
#define BRCMSTB_WKTMR_PRESCALER 0x0C
@@ -41,28 +45,71 @@ struct brcmstb_waketmr {
#define BRCMSTB_WKTMR_DEFAULT_FREQ 27000000
+static inline bool brcmstb_waketmr_is_pending(struct brcmstb_waketmr *timer)
+{
+ u32 reg;
+
+ reg = readl_relaxed(timer->base + BRCMSTB_WKTMR_EVENT);
+ return !!(reg & WKTMR_ALARM_EVENT);
+}
+
static inline void brcmstb_waketmr_clear_alarm(struct brcmstb_waketmr *timer)
{
- writel_relaxed(1, timer->base + BRCMSTB_WKTMR_EVENT);
+ u32 reg;
+
+ if (timer->alarm_en && timer->alarm_irq)
+ disable_irq(timer->alarm_irq);
+ timer->alarm_en = false;
+ reg = readl_relaxed(timer->base + BRCMSTB_WKTMR_COUNTER);
+ writel_relaxed(reg - 1, timer->base + BRCMSTB_WKTMR_ALARM);
+ writel_relaxed(WKTMR_ALARM_EVENT, timer->base + BRCMSTB_WKTMR_EVENT);
(void)readl_relaxed(timer->base + BRCMSTB_WKTMR_EVENT);
}
static void brcmstb_waketmr_set_alarm(struct brcmstb_waketmr *timer,
unsigned int secs)
{
+ unsigned int now;
+
brcmstb_waketmr_clear_alarm(timer);
/* Make sure we are actually counting in seconds */
writel_relaxed(timer->rate, timer->base + BRCMSTB_WKTMR_PRESCALER);
- writel_relaxed(secs + 1, timer->base + BRCMSTB_WKTMR_ALARM);
+ writel_relaxed(secs, timer->base + BRCMSTB_WKTMR_ALARM);
+ now = readl_relaxed(timer->base + BRCMSTB_WKTMR_COUNTER);
+
+ while ((int)(secs - now) <= 0 &&
+ !brcmstb_waketmr_is_pending(timer)) {
+ secs = now + 1;
+ writel_relaxed(secs, timer->base + BRCMSTB_WKTMR_ALARM);
+ now = readl_relaxed(timer->base + BRCMSTB_WKTMR_COUNTER);
+ }
}
static irqreturn_t brcmstb_waketmr_irq(int irq, void *data)
{
struct brcmstb_waketmr *timer = data;
- pm_wakeup_event(timer->dev, 0);
+ if (!timer->alarm_irq)
+ pm_wakeup_event(timer->dev, 0);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t brcmstb_alarm_irq(int irq, void *data)
+{
+ struct brcmstb_waketmr *timer = data;
+
+ /* Ignore spurious interrupts */
+ if (!brcmstb_waketmr_is_pending(timer))
+ return IRQ_HANDLED;
+
+ if (timer->alarm_en) {
+ if (!device_may_wakeup(timer->dev))
+ writel_relaxed(WKTMR_ALARM_EVENT,
+ timer->base + BRCMSTB_WKTMR_EVENT);
+ rtc_update_irq(timer->rtc, 1, RTC_IRQF | RTC_AF);
+ }
return IRQ_HANDLED;
}
@@ -88,17 +135,25 @@ static void wktmr_read(struct brcmstb_waketmr *timer,
static int brcmstb_waketmr_prepare_suspend(struct brcmstb_waketmr *timer)
{
struct device *dev = timer->dev;
- int ret = 0;
+ int ret;
if (device_may_wakeup(dev)) {
- ret = enable_irq_wake(timer->irq);
+ ret = enable_irq_wake(timer->wake_irq);
if (ret) {
dev_err(dev, "failed to enable wake-up interrupt\n");
return ret;
}
+ if (timer->alarm_en && timer->alarm_irq) {
+ ret = enable_irq_wake(timer->alarm_irq);
+ if (ret) {
+ dev_err(dev, "failed to enable rtc interrupt\n");
+ disable_irq_wake(timer->wake_irq);
+ return ret;
+ }
+ }
}
- return ret;
+ return 0;
}
/* If enabled as a wakeup-source, arm the timer when powering off */
@@ -146,46 +201,47 @@ static int brcmstb_waketmr_getalarm(struct device *dev,
struct rtc_wkalrm *alarm)
{
struct brcmstb_waketmr *timer = dev_get_drvdata(dev);
- time64_t sec;
- u32 reg;
- sec = readl_relaxed(timer->base + BRCMSTB_WKTMR_ALARM);
- if (sec != 0) {
- /* Alarm is enabled */
- alarm->enabled = 1;
- rtc_time64_to_tm(sec, &alarm->time);
- }
+ alarm->enabled = timer->alarm_en;
+ rtc_time64_to_tm(timer->rtc_alarm, &alarm->time);
- reg = readl_relaxed(timer->base + BRCMSTB_WKTMR_EVENT);
- alarm->pending = !!(reg & 1);
+ alarm->pending = brcmstb_waketmr_is_pending(timer);
return 0;
}
-static int brcmstb_waketmr_setalarm(struct device *dev,
- struct rtc_wkalrm *alarm)
+static int brcmstb_waketmr_alarm_enable(struct device *dev,
+ unsigned int enabled)
{
struct brcmstb_waketmr *timer = dev_get_drvdata(dev);
- time64_t sec;
-
- if (alarm->enabled)
- sec = rtc_tm_to_time64(&alarm->time);
- else
- sec = 0;
- brcmstb_waketmr_set_alarm(timer, sec);
+ if (enabled && !timer->alarm_en) {
+ if ((int)(readl_relaxed(timer->base + BRCMSTB_WKTMR_COUNTER) -
+ readl_relaxed(timer->base + BRCMSTB_WKTMR_ALARM)) >= 0 &&
+ !brcmstb_waketmr_is_pending(timer))
+ return -EINVAL;
+ timer->alarm_en = true;
+ if (timer->alarm_irq)
+ enable_irq(timer->alarm_irq);
+ } else if (!enabled && timer->alarm_en) {
+ if (timer->alarm_irq)
+ disable_irq(timer->alarm_irq);
+ timer->alarm_en = false;
+ }
return 0;
}
-/*
- * Does not do much but keep the RTC class happy. We always support
- * alarms.
- */
-static int brcmstb_waketmr_alarm_enable(struct device *dev,
- unsigned int enabled)
+static int brcmstb_waketmr_setalarm(struct device *dev,
+ struct rtc_wkalrm *alarm)
{
- return 0;
+ struct brcmstb_waketmr *timer = dev_get_drvdata(dev);
+
+ timer->rtc_alarm = rtc_tm_to_time64(&alarm->time);
+
+ brcmstb_waketmr_set_alarm(timer, timer->rtc_alarm);
+
+ return brcmstb_waketmr_alarm_enable(dev, alarm->enabled);
}
static const struct rtc_class_ops brcmstb_waketmr_ops = {
@@ -221,12 +277,12 @@ static int brcmstb_waketmr_probe(struct platform_device *pdev)
* Set wakeup capability before requesting wakeup interrupt, so we can
* process boot-time "wakeups" (e.g., from S5 soft-off)
*/
- device_set_wakeup_capable(dev, true);
- device_wakeup_enable(dev);
+ device_init_wakeup(dev, true);
- timer->irq = platform_get_irq(pdev, 0);
- if (timer->irq < 0)
+ ret = platform_get_irq(pdev, 0);
+ if (ret < 0)
return -ENODEV;
+ timer->wake_irq = (unsigned int)ret;
timer->clk = devm_clk_get(dev, NULL);
if (!IS_ERR(timer->clk)) {
@@ -241,11 +297,24 @@ static int brcmstb_waketmr_probe(struct platform_device *pdev)
timer->clk = NULL;
}
- ret = devm_request_irq(dev, timer->irq, brcmstb_waketmr_irq, 0,
+ ret = devm_request_irq(dev, timer->wake_irq, brcmstb_waketmr_irq, 0,
"brcmstb-waketimer", timer);
if (ret < 0)
goto err_clk;
+ brcmstb_waketmr_clear_alarm(timer);
+
+ /* Attempt to initialize non-wake irq */
+ ret = platform_get_irq(pdev, 1);
+ if (ret > 0) {
+ timer->alarm_irq = (unsigned int)ret;
+ ret = devm_request_irq(dev, timer->alarm_irq, brcmstb_alarm_irq,
+ IRQF_NO_AUTOEN, "brcmstb-waketimer-rtc",
+ timer);
+ if (ret < 0)
+ timer->alarm_irq = 0;
+ }
+
timer->reboot_notifier.notifier_call = brcmstb_waketmr_reboot;
register_reboot_notifier(&timer->reboot_notifier);
@@ -256,8 +325,6 @@ static int brcmstb_waketmr_probe(struct platform_device *pdev)
if (ret)
goto err_notifier;
- dev_info(dev, "registered, with irq %d\n", timer->irq);
-
return 0;
err_notifier:
@@ -295,7 +362,9 @@ static int brcmstb_waketmr_resume(struct device *dev)
if (!device_may_wakeup(dev))
return 0;
- ret = disable_irq_wake(timer->irq);
+ ret = disable_irq_wake(timer->wake_irq);
+ if (timer->alarm_en && timer->alarm_irq)
+ disable_irq_wake(timer->alarm_irq);
brcmstb_waketmr_clear_alarm(timer);
@@ -325,4 +394,5 @@ module_platform_driver(brcmstb_waketmr_driver);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Brian Norris");
MODULE_AUTHOR("Markus Mayer");
+MODULE_AUTHOR("Doug Berger");
MODULE_DESCRIPTION("Wake-up timer driver for STB chips");
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index def9b7f9d9577..e86ba84df6cbe 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -1712,9 +1712,9 @@ static const struct regmap_config regmap_config = {
.val_bits = 8,
};
-static int ds1307_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
+static int ds1307_probe(struct i2c_client *client)
{
+ const struct i2c_device_id *id = i2c_client_get_device_id(client);
struct ds1307 *ds1307;
const void *match;
int err = -ENODEV;
@@ -2011,7 +2011,7 @@ static struct i2c_driver ds1307_driver = {
.name = "rtc-ds1307",
.of_match_table = ds1307_of_match,
},
- .probe = ds1307_probe,
+ .probe_new = ds1307_probe,
.id_table = ds1307_id,
};
diff --git a/drivers/rtc/rtc-efi.c b/drivers/rtc/rtc-efi.c
index 1e8bc6cc1e12d..dc6b0f4a54e2e 100644
--- a/drivers/rtc/rtc-efi.c
+++ b/drivers/rtc/rtc-efi.c
@@ -164,7 +164,7 @@ static int efi_read_time(struct device *dev, struct rtc_time *tm)
if (status != EFI_SUCCESS) {
/* should never happen */
- dev_err(dev, "can't read time\n");
+ dev_err_once(dev, "can't read time\n");
return -EINVAL;
}
diff --git a/drivers/rtc/rtc-hym8563.c b/drivers/rtc/rtc-hym8563.c
index cc710d682121b..7d5a298a9a3bc 100644
--- a/drivers/rtc/rtc-hym8563.c
+++ b/drivers/rtc/rtc-hym8563.c
@@ -518,9 +518,14 @@ static int hym8563_probe(struct i2c_client *client)
}
if (client->irq > 0) {
+ unsigned long irqflags = IRQF_TRIGGER_LOW;
+
+ if (dev_fwnode(&client->dev))
+ irqflags = 0;
+
ret = devm_request_threaded_irq(&client->dev, client->irq,
NULL, hym8563_irq,
- IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ irqflags | IRQF_ONESHOT,
client->name, hym8563);
if (ret < 0) {
dev_err(&client->dev, "irq %d request failed, %d\n",
diff --git a/drivers/rtc/rtc-isl12022.c b/drivers/rtc/rtc-isl12022.c
index a3b0de3393f57..e68a79b5e00e5 100644
--- a/drivers/rtc/rtc-isl12022.c
+++ b/drivers/rtc/rtc-isl12022.c
@@ -8,16 +8,16 @@
* by Alessandro Zummo <a.zummo@towertech.it>.
*/
-#include <linux/i2c.h>
#include <linux/bcd.h>
-#include <linux/rtc.h>
-#include <linux/slab.h>
-#include <linux/module.h>
#include <linux/err.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-#include <linux/regmap.h>
#include <linux/hwmon.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/rtc.h>
+#include <linux/slab.h>
+
+#include <asm/byteorder.h>
/* ISL register offsets */
#define ISL12022_REG_SC 0x00
@@ -44,13 +44,6 @@
#define ISL12022_BETA_TSE (1 << 7)
-static struct i2c_driver isl12022_driver;
-
-struct isl12022 {
- struct rtc_device *rtc;
- struct regmap *regmap;
-};
-
static umode_t isl12022_hwmon_is_visible(const void *data,
enum hwmon_sensor_types type,
u32 attr, int channel)
@@ -67,19 +60,17 @@ static umode_t isl12022_hwmon_is_visible(const void *data,
*/
static int isl12022_hwmon_read_temp(struct device *dev, long *mC)
{
- struct isl12022 *isl12022 = dev_get_drvdata(dev);
- struct regmap *regmap = isl12022->regmap;
- u8 temp_buf[2];
+ struct regmap *regmap = dev_get_drvdata(dev);
int temp, ret;
+ __le16 buf;
- ret = regmap_bulk_read(regmap, ISL12022_REG_TEMP_L,
- temp_buf, sizeof(temp_buf));
+ ret = regmap_bulk_read(regmap, ISL12022_REG_TEMP_L, &buf, sizeof(buf));
if (ret)
return ret;
/*
* Temperature is represented as a 10-bit number, unit half-Kelvins.
*/
- temp = (temp_buf[1] << 8) | temp_buf[0];
+ temp = le16_to_cpu(buf);
temp *= 500;
temp -= 273000;
@@ -115,23 +106,21 @@ static const struct hwmon_chip_info isl12022_hwmon_chip_info = {
static void isl12022_hwmon_register(struct device *dev)
{
- struct isl12022 *isl12022;
+ struct regmap *regmap = dev_get_drvdata(dev);
struct device *hwmon;
int ret;
if (!IS_REACHABLE(CONFIG_HWMON))
return;
- isl12022 = dev_get_drvdata(dev);
-
- ret = regmap_update_bits(isl12022->regmap, ISL12022_REG_BETA,
+ ret = regmap_update_bits(regmap, ISL12022_REG_BETA,
ISL12022_BETA_TSE, ISL12022_BETA_TSE);
if (ret) {
dev_warn(dev, "unable to enable temperature sensor\n");
return;
}
- hwmon = devm_hwmon_device_register_with_info(dev, "isl12022", isl12022,
+ hwmon = devm_hwmon_device_register_with_info(dev, "isl12022", regmap,
&isl12022_hwmon_chip_info,
NULL);
if (IS_ERR(hwmon))
@@ -144,8 +133,7 @@ static void isl12022_hwmon_register(struct device *dev)
*/
static int isl12022_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
- struct isl12022 *isl12022 = dev_get_drvdata(dev);
- struct regmap *regmap = isl12022->regmap;
+ struct regmap *regmap = dev_get_drvdata(dev);
uint8_t buf[ISL12022_REG_INT + 1];
int ret;
@@ -155,16 +143,12 @@ static int isl12022_rtc_read_time(struct device *dev, struct rtc_time *tm)
if (buf[ISL12022_REG_SR] & (ISL12022_SR_LBAT85 | ISL12022_SR_LBAT75)) {
dev_warn(dev,
- "voltage dropped below %u%%, "
- "date and time is not reliable.\n",
+ "voltage dropped below %u%%, date and time is not reliable.\n",
buf[ISL12022_REG_SR] & ISL12022_SR_LBAT85 ? 85 : 75);
}
dev_dbg(dev,
- "%s: raw data is sec=%02x, min=%02x, hr=%02x, "
- "mday=%02x, mon=%02x, year=%02x, wday=%02x, "
- "sr=%02x, int=%02x",
- __func__,
+ "raw data is sec=%02x, min=%02x, hr=%02x, mday=%02x, mon=%02x, year=%02x, wday=%02x, sr=%02x, int=%02x",
buf[ISL12022_REG_SC],
buf[ISL12022_REG_MN],
buf[ISL12022_REG_HR],
@@ -190,8 +174,7 @@ static int isl12022_rtc_read_time(struct device *dev, struct rtc_time *tm)
static int isl12022_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
- struct isl12022 *isl12022 = dev_get_drvdata(dev);
- struct regmap *regmap = isl12022->regmap;
+ struct regmap *regmap = dev_get_drvdata(dev);
int ret;
uint8_t buf[ISL12022_REG_DW + 1];
@@ -218,8 +201,7 @@ static int isl12022_rtc_set_time(struct device *dev, struct rtc_time *tm)
buf[ISL12022_REG_DW] = tm->tm_wday & 0x07;
- return regmap_bulk_write(isl12022->regmap, ISL12022_REG_SC,
- buf, sizeof(buf));
+ return regmap_bulk_write(regmap, ISL12022_REG_SC, buf, sizeof(buf));
}
static const struct rtc_class_ops isl12022_rtc_ops = {
@@ -235,44 +217,39 @@ static const struct regmap_config regmap_config = {
static int isl12022_probe(struct i2c_client *client)
{
- struct isl12022 *isl12022;
+ struct rtc_device *rtc;
+ struct regmap *regmap;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
return -ENODEV;
- isl12022 = devm_kzalloc(&client->dev, sizeof(struct isl12022),
- GFP_KERNEL);
- if (!isl12022)
- return -ENOMEM;
- dev_set_drvdata(&client->dev, isl12022);
-
- isl12022->regmap = devm_regmap_init_i2c(client, ®map_config);
- if (IS_ERR(isl12022->regmap)) {
+ regmap = devm_regmap_init_i2c(client, ®map_config);
+ if (IS_ERR(regmap)) {
dev_err(&client->dev, "regmap allocation failed\n");
- return PTR_ERR(isl12022->regmap);
+ return PTR_ERR(regmap);
}
+ dev_set_drvdata(&client->dev, regmap);
+
isl12022_hwmon_register(&client->dev);
- isl12022->rtc = devm_rtc_allocate_device(&client->dev);
- if (IS_ERR(isl12022->rtc))
- return PTR_ERR(isl12022->rtc);
+ rtc = devm_rtc_allocate_device(&client->dev);
+ if (IS_ERR(rtc))
+ return PTR_ERR(rtc);
- isl12022->rtc->ops = &isl12022_rtc_ops;
- isl12022->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
- isl12022->rtc->range_max = RTC_TIMESTAMP_END_2099;
+ rtc->ops = &isl12022_rtc_ops;
+ rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
+ rtc->range_max = RTC_TIMESTAMP_END_2099;
- return devm_rtc_register_device(isl12022->rtc);
+ return devm_rtc_register_device(rtc);
}
-#ifdef CONFIG_OF
static const struct of_device_id isl12022_dt_match[] = {
{ .compatible = "isl,isl12022" }, /* for backward compat., don't use */
{ .compatible = "isil,isl12022" },
{ },
};
MODULE_DEVICE_TABLE(of, isl12022_dt_match);
-#endif
static const struct i2c_device_id isl12022_id[] = {
{ "isl12022", 0 },
@@ -283,9 +260,7 @@ MODULE_DEVICE_TABLE(i2c, isl12022_id);
static struct i2c_driver isl12022_driver = {
.driver = {
.name = "rtc-isl12022",
-#ifdef CONFIG_OF
- .of_match_table = of_match_ptr(isl12022_dt_match),
-#endif
+ .of_match_table = isl12022_dt_match,
},
.probe_new = isl12022_probe,
.id_table = isl12022_id,
diff --git a/drivers/rtc/rtc-jz4740.c b/drivers/rtc/rtc-jz4740.c
index c383719292c7d..59d279e3e6f5b 100644
--- a/drivers/rtc/rtc-jz4740.c
+++ b/drivers/rtc/rtc-jz4740.c
@@ -6,12 +6,15 @@
*/
#include <linux/clk.h>
+#include <linux/clk-provider.h>
#include <linux/io.h>
+#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_wakeirq.h>
+#include <linux/property.h>
#include <linux/reboot.h>
#include <linux/rtc.h>
#include <linux/slab.h>
@@ -25,6 +28,7 @@
#define JZ_REG_RTC_WAKEUP_FILTER 0x24
#define JZ_REG_RTC_RESET_COUNTER 0x28
#define JZ_REG_RTC_SCRATCHPAD 0x34
+#define JZ_REG_RTC_CKPCR 0x40
/* The following are present on the jz4780 */
#define JZ_REG_RTC_WENR 0x3C
@@ -44,6 +48,9 @@
#define JZ_RTC_WAKEUP_FILTER_MASK 0x0000FFE0
#define JZ_RTC_RESET_COUNTER_MASK 0x00000FE0
+#define JZ_RTC_CKPCR_CK32PULL_DIS BIT(4)
+#define JZ_RTC_CKPCR_CK32CTL_EN (BIT(2) | BIT(1))
+
enum jz4740_rtc_type {
ID_JZ4740,
ID_JZ4760,
@@ -56,6 +63,8 @@ struct jz4740_rtc {
struct rtc_device *rtc;
+ struct clk_hw clk32k;
+
spinlock_t lock;
};
@@ -69,19 +78,15 @@ static inline uint32_t jz4740_rtc_reg_read(struct jz4740_rtc *rtc, size_t reg)
static int jz4740_rtc_wait_write_ready(struct jz4740_rtc *rtc)
{
uint32_t ctrl;
- int timeout = 10000;
- do {
- ctrl = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_CTRL);
- } while (!(ctrl & JZ_RTC_CTRL_WRDY) && --timeout);
-
- return timeout ? 0 : -EIO;
+ return readl_poll_timeout(rtc->base + JZ_REG_RTC_CTRL, ctrl,
+ ctrl & JZ_RTC_CTRL_WRDY, 0, 1000);
}
static inline int jz4780_rtc_enable_write(struct jz4740_rtc *rtc)
{
uint32_t ctrl;
- int ret, timeout = 10000;
+ int ret;
ret = jz4740_rtc_wait_write_ready(rtc);
if (ret != 0)
@@ -89,11 +94,8 @@ static inline int jz4780_rtc_enable_write(struct jz4740_rtc *rtc)
writel(JZ_RTC_WENR_MAGIC, rtc->base + JZ_REG_RTC_WENR);
- do {
- ctrl = readl(rtc->base + JZ_REG_RTC_WENR);
- } while (!(ctrl & JZ_RTC_WENR_WEN) && --timeout);
-
- return timeout ? 0 : -EIO;
+ return readl_poll_timeout(rtc->base + JZ_REG_RTC_WENR, ctrl,
+ ctrl & JZ_RTC_WENR_WEN, 0, 1000);
}
static inline int jz4740_rtc_reg_write(struct jz4740_rtc *rtc, size_t reg,
@@ -260,6 +262,7 @@ static void jz4740_rtc_power_off(void)
static const struct of_device_id jz4740_rtc_of_match[] = {
{ .compatible = "ingenic,jz4740-rtc", .data = (void *)ID_JZ4740 },
{ .compatible = "ingenic,jz4760-rtc", .data = (void *)ID_JZ4760 },
+ { .compatible = "ingenic,jz4770-rtc", .data = (void *)ID_JZ4780 },
{ .compatible = "ingenic,jz4780-rtc", .data = (void *)ID_JZ4780 },
{},
};
@@ -301,6 +304,38 @@ static void jz4740_rtc_set_wakeup_params(struct jz4740_rtc *rtc,
jz4740_rtc_reg_write(rtc, JZ_REG_RTC_RESET_COUNTER, reset_ticks);
}
+static int jz4740_rtc_clk32k_enable(struct clk_hw *hw)
+{
+ struct jz4740_rtc *rtc = container_of(hw, struct jz4740_rtc, clk32k);
+
+ return jz4740_rtc_reg_write(rtc, JZ_REG_RTC_CKPCR,
+ JZ_RTC_CKPCR_CK32PULL_DIS |
+ JZ_RTC_CKPCR_CK32CTL_EN);
+}
+
+static void jz4740_rtc_clk32k_disable(struct clk_hw *hw)
+{
+ struct jz4740_rtc *rtc = container_of(hw, struct jz4740_rtc, clk32k);
+
+ jz4740_rtc_reg_write(rtc, JZ_REG_RTC_CKPCR, 0);
+}
+
+static int jz4740_rtc_clk32k_is_enabled(struct clk_hw *hw)
+{
+ struct jz4740_rtc *rtc = container_of(hw, struct jz4740_rtc, clk32k);
+ u32 ckpcr;
+
+ ckpcr = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_CKPCR);
+
+ return !!(ckpcr & JZ_RTC_CKPCR_CK32CTL_EN);
+}
+
+static const struct clk_ops jz4740_rtc_clk32k_ops = {
+ .enable = jz4740_rtc_clk32k_enable,
+ .disable = jz4740_rtc_clk32k_disable,
+ .is_enabled = jz4740_rtc_clk32k_is_enabled,
+};
+
static int jz4740_rtc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -335,17 +370,13 @@ static int jz4740_rtc_probe(struct platform_device *pdev)
device_init_wakeup(dev, 1);
ret = dev_pm_set_wake_irq(dev, irq);
- if (ret) {
- dev_err(dev, "Failed to set wake irq: %d\n", ret);
- return ret;
- }
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to set wake irq\n");
rtc->rtc = devm_rtc_allocate_device(dev);
- if (IS_ERR(rtc->rtc)) {
- ret = PTR_ERR(rtc->rtc);
- dev_err(dev, "Failed to allocate rtc device: %d\n", ret);
- return ret;
- }
+ if (IS_ERR(rtc->rtc))
+ return dev_err_probe(dev, PTR_ERR(rtc->rtc),
+ "Failed to allocate rtc device\n");
rtc->rtc->ops = &jz4740_rtc_ops;
rtc->rtc->range_max = U32_MAX;
@@ -362,10 +393,8 @@ static int jz4740_rtc_probe(struct platform_device *pdev)
ret = devm_request_irq(dev, irq, jz4740_rtc_irq, 0,
pdev->name, rtc);
- if (ret) {
- dev_err(dev, "Failed to request rtc irq: %d\n", ret);
- return ret;
- }
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to request rtc irq\n");
if (of_device_is_system_power_controller(np)) {
dev_for_power_off = dev;
@@ -376,6 +405,21 @@ static int jz4740_rtc_probe(struct platform_device *pdev)
dev_warn(dev, "Poweroff handler already present!\n");
}
+ if (device_property_present(dev, "#clock-cells")) {
+ rtc->clk32k.init = CLK_HW_INIT_HW("clk32k", __clk_get_hw(clk),
+ &jz4740_rtc_clk32k_ops, 0);
+
+ ret = devm_clk_hw_register(dev, &rtc->clk32k);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "Unable to register clk32k clock\n");
+
+ ret = of_clk_add_hw_provider(np, of_clk_hw_simple_get, &rtc->clk32k);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "Unable to register clk32k clock provider\n");
+ }
+
return 0;
}
diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index 494052dbd39ff..c1963f7c424d7 100644
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -914,9 +914,14 @@ static int m41t80_probe(struct i2c_client *client)
"wakeup-source");
#endif
if (client->irq > 0) {
+ unsigned long irqflags = IRQF_TRIGGER_LOW;
+
+ if (dev_fwnode(&client->dev))
+ irqflags = 0;
+
rc = devm_request_threaded_irq(&client->dev, client->irq,
NULL, m41t80_handle_irq,
- IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ irqflags | IRQF_ONESHOT,
"m41t80", client);
if (rc) {
dev_warn(&client->dev, "unable to request IRQ, alarms disabled\n");
diff --git a/drivers/rtc/rtc-max8907.c b/drivers/rtc/rtc-max8907.c
index db3495d102747..af97140dd00a5 100644
--- a/drivers/rtc/rtc-max8907.c
+++ b/drivers/rtc/rtc-max8907.c
@@ -9,7 +9,6 @@
*/
#include <linux/bcd.h>
-#include <linux/i2c.h>
#include <linux/mfd/max8907.h>
#include <linux/module.h>
#include <linux/platform_device.h>
diff --git a/drivers/rtc/rtc-moxart.c b/drivers/rtc/rtc-moxart.c
index 6b24ac9e1cfa8..2247dd39ee4b6 100644
--- a/drivers/rtc/rtc-moxart.c
+++ b/drivers/rtc/rtc-moxart.c
@@ -10,14 +10,15 @@
* Moxa Technology Co., Ltd. <www.moxa.com>
*/
+#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/rtc.h>
#include <linux/platform_device.h>
#include <linux/module.h>
-#include <linux/gpio.h>
-#include <linux/of_gpio.h>
+#include <linux/mod_devicetable.h>
+#include <linux/gpio/consumer.h>
#define GPIO_RTC_RESERVED 0x0C
#define GPIO_RTC_DATA_SET 0x10
@@ -55,7 +56,9 @@
struct moxart_rtc {
struct rtc_device *rtc;
spinlock_t rtc_lock;
- int gpio_data, gpio_sclk, gpio_reset;
+ struct gpio_desc *gpio_data;
+ struct gpio_desc *gpio_sclk;
+ struct gpio_desc *gpio_reset;
};
static int day_of_year[12] = { 0, 31, 59, 90, 120, 151, 181,
@@ -67,10 +70,10 @@ static void moxart_rtc_write_byte(struct device *dev, u8 data)
int i;
for (i = 0; i < 8; i++, data >>= 1) {
- gpio_set_value(moxart_rtc->gpio_sclk, 0);
- gpio_set_value(moxart_rtc->gpio_data, ((data & 1) == 1));
+ gpiod_set_value(moxart_rtc->gpio_sclk, 0);
+ gpiod_set_value(moxart_rtc->gpio_data, ((data & 1) == 1));
udelay(GPIO_RTC_DELAY_TIME);
- gpio_set_value(moxart_rtc->gpio_sclk, 1);
+ gpiod_set_value(moxart_rtc->gpio_sclk, 1);
udelay(GPIO_RTC_DELAY_TIME);
}
}
@@ -82,11 +85,11 @@ static u8 moxart_rtc_read_byte(struct device *dev)
u8 data = 0;
for (i = 0; i < 8; i++) {
- gpio_set_value(moxart_rtc->gpio_sclk, 0);
+ gpiod_set_value(moxart_rtc->gpio_sclk, 0);
udelay(GPIO_RTC_DELAY_TIME);
- gpio_set_value(moxart_rtc->gpio_sclk, 1);
+ gpiod_set_value(moxart_rtc->gpio_sclk, 1);
udelay(GPIO_RTC_DELAY_TIME);
- if (gpio_get_value(moxart_rtc->gpio_data))
+ if (gpiod_get_value(moxart_rtc->gpio_data))
data |= (1 << i);
udelay(GPIO_RTC_DELAY_TIME);
}
@@ -101,15 +104,15 @@ static u8 moxart_rtc_read_register(struct device *dev, u8 cmd)
local_irq_save(flags);
- gpio_direction_output(moxart_rtc->gpio_data, 0);
- gpio_set_value(moxart_rtc->gpio_reset, 1);
+ gpiod_direction_output(moxart_rtc->gpio_data, 0);
+ gpiod_set_value(moxart_rtc->gpio_reset, 1);
udelay(GPIO_RTC_DELAY_TIME);
moxart_rtc_write_byte(dev, cmd);
- gpio_direction_input(moxart_rtc->gpio_data);
+ gpiod_direction_input(moxart_rtc->gpio_data);
udelay(GPIO_RTC_DELAY_TIME);
data = moxart_rtc_read_byte(dev);
- gpio_set_value(moxart_rtc->gpio_sclk, 0);
- gpio_set_value(moxart_rtc->gpio_reset, 0);
+ gpiod_set_value(moxart_rtc->gpio_sclk, 0);
+ gpiod_set_value(moxart_rtc->gpio_reset, 0);
udelay(GPIO_RTC_DELAY_TIME);
local_irq_restore(flags);
@@ -124,13 +127,13 @@ static void moxart_rtc_write_register(struct device *dev, u8 cmd, u8 data)
local_irq_save(flags);
- gpio_direction_output(moxart_rtc->gpio_data, 0);
- gpio_set_value(moxart_rtc->gpio_reset, 1);
+ gpiod_direction_output(moxart_rtc->gpio_data, 0);
+ gpiod_set_value(moxart_rtc->gpio_reset, 1);
udelay(GPIO_RTC_DELAY_TIME);
moxart_rtc_write_byte(dev, cmd);
moxart_rtc_write_byte(dev, data);
- gpio_set_value(moxart_rtc->gpio_sclk, 0);
- gpio_set_value(moxart_rtc->gpio_reset, 0);
+ gpiod_set_value(moxart_rtc->gpio_sclk, 0);
+ gpiod_set_value(moxart_rtc->gpio_reset, 0);
udelay(GPIO_RTC_DELAY_TIME);
local_irq_restore(flags);
@@ -247,53 +250,33 @@ static int moxart_rtc_probe(struct platform_device *pdev)
if (!moxart_rtc)
return -ENOMEM;
- moxart_rtc->gpio_data = of_get_named_gpio(pdev->dev.of_node,
- "gpio-rtc-data", 0);
- if (!gpio_is_valid(moxart_rtc->gpio_data)) {
- dev_err(&pdev->dev, "invalid gpio (data): %d\n",
- moxart_rtc->gpio_data);
- return moxart_rtc->gpio_data;
- }
-
- moxart_rtc->gpio_sclk = of_get_named_gpio(pdev->dev.of_node,
- "gpio-rtc-sclk", 0);
- if (!gpio_is_valid(moxart_rtc->gpio_sclk)) {
- dev_err(&pdev->dev, "invalid gpio (sclk): %d\n",
- moxart_rtc->gpio_sclk);
- return moxart_rtc->gpio_sclk;
- }
-
- moxart_rtc->gpio_reset = of_get_named_gpio(pdev->dev.of_node,
- "gpio-rtc-reset", 0);
- if (!gpio_is_valid(moxart_rtc->gpio_reset)) {
- dev_err(&pdev->dev, "invalid gpio (reset): %d\n",
- moxart_rtc->gpio_reset);
- return moxart_rtc->gpio_reset;
- }
-
- spin_lock_init(&moxart_rtc->rtc_lock);
- platform_set_drvdata(pdev, moxart_rtc);
-
- ret = devm_gpio_request(&pdev->dev, moxart_rtc->gpio_data, "rtc_data");
+ moxart_rtc->gpio_data = devm_gpiod_get(&pdev->dev, "rtc-data",
+ GPIOD_IN);
+ ret = PTR_ERR_OR_ZERO(moxart_rtc->gpio_data);
if (ret) {
- dev_err(&pdev->dev, "can't get rtc_data gpio\n");
+ dev_err(&pdev->dev, "can't get rtc data gpio: %d\n", ret);
return ret;
}
- ret = devm_gpio_request_one(&pdev->dev, moxart_rtc->gpio_sclk,
- GPIOF_DIR_OUT, "rtc_sclk");
+ moxart_rtc->gpio_sclk = devm_gpiod_get(&pdev->dev, "rtc-sclk",
+ GPIOD_ASIS);
+ ret = PTR_ERR_OR_ZERO(moxart_rtc->gpio_sclk);
if (ret) {
- dev_err(&pdev->dev, "can't get rtc_sclk gpio\n");
+ dev_err(&pdev->dev, "can't get rtc sclk gpio: %d\n", ret);
return ret;
}
- ret = devm_gpio_request_one(&pdev->dev, moxart_rtc->gpio_reset,
- GPIOF_DIR_OUT, "rtc_reset");
+ moxart_rtc->gpio_reset = devm_gpiod_get(&pdev->dev, "rtc-reset",
+ GPIOD_ASIS);
+ ret = PTR_ERR_OR_ZERO(moxart_rtc->gpio_reset);
if (ret) {
- dev_err(&pdev->dev, "can't get rtc_reset gpio\n");
+ dev_err(&pdev->dev, "can't get rtc reset gpio: %d\n", ret);
return ret;
}
+ spin_lock_init(&moxart_rtc->rtc_lock);
+ platform_set_drvdata(pdev, moxart_rtc);
+
moxart_rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
&moxart_rtc_ops,
THIS_MODULE);
diff --git a/drivers/rtc/rtc-nxp-bbnsm.c b/drivers/rtc/rtc-nxp-bbnsm.c
new file mode 100644
index 0000000000000..acbfbeb8b0700
--- /dev/null
+++ b/drivers/rtc/rtc-nxp-bbnsm.c
@@ -0,0 +1,226 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// Copyright 2022 NXP.
+
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_wakeirq.h>
+#include <linux/regmap.h>
+#include <linux/rtc.h>
+
+#define BBNSM_CTRL 0x8
+#define BBNSM_INT_EN 0x10
+#define BBNSM_EVENTS 0x14
+#define BBNSM_RTC_LS 0x40
+#define BBNSM_RTC_MS 0x44
+#define BBNSM_TA 0x50
+
+#define RTC_EN 0x2
+#define RTC_EN_MSK 0x3
+#define TA_EN (0x2 << 2)
+#define TA_DIS (0x1 << 2)
+#define TA_EN_MSK (0x3 << 2)
+#define RTC_INT_EN 0x2
+#define TA_INT_EN (0x2 << 2)
+
+#define BBNSM_EVENT_TA (0x2 << 2)
+
+#define CNTR_TO_SECS_SH 15
+
+struct bbnsm_rtc {
+ struct rtc_device *rtc;
+ struct regmap *regmap;
+ int irq;
+ struct clk *clk;
+};
+
+static u32 bbnsm_read_counter(struct bbnsm_rtc *bbnsm)
+{
+ u32 rtc_msb, rtc_lsb;
+ unsigned int timeout = 100;
+ u32 time;
+ u32 tmp = 0;
+
+ do {
+ time = tmp;
+ /* read the msb */
+ regmap_read(bbnsm->regmap, BBNSM_RTC_MS, &rtc_msb);
+ /* read the lsb */
+ regmap_read(bbnsm->regmap, BBNSM_RTC_LS, &rtc_lsb);
+ /* convert to seconds */
+ tmp = (rtc_msb << 17) | (rtc_lsb >> 15);
+ } while (tmp != time && --timeout);
+
+ return time;
+}
+
+static int bbnsm_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+ struct bbnsm_rtc *bbnsm = dev_get_drvdata(dev);
+ unsigned long time;
+ u32 val;
+
+ regmap_read(bbnsm->regmap, BBNSM_CTRL, &val);
+ if ((val & RTC_EN_MSK) != RTC_EN)
+ return -EINVAL;
+
+ time = bbnsm_read_counter(bbnsm);
+ rtc_time64_to_tm(time, tm);
+
+ return 0;
+}
+
+static int bbnsm_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+ struct bbnsm_rtc *bbnsm = dev_get_drvdata(dev);
+ unsigned long time = rtc_tm_to_time64(tm);
+
+ /* disable the RTC first */
+ regmap_update_bits(bbnsm->regmap, BBNSM_CTRL, RTC_EN_MSK, 0);
+
+ /* write the 32bit sec time to 47 bit timer counter, leaving 15 LSBs blank */
+ regmap_write(bbnsm->regmap, BBNSM_RTC_LS, time << CNTR_TO_SECS_SH);
+ regmap_write(bbnsm->regmap, BBNSM_RTC_MS, time >> (32 - CNTR_TO_SECS_SH));
+
+ /* Enable the RTC again */
+ regmap_update_bits(bbnsm->regmap, BBNSM_CTRL, RTC_EN_MSK, RTC_EN);
+
+ return 0;
+}
+
+static int bbnsm_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+ struct bbnsm_rtc *bbnsm = dev_get_drvdata(dev);
+ u32 bbnsm_events, bbnsm_ta;
+
+ regmap_read(bbnsm->regmap, BBNSM_TA, &bbnsm_ta);
+ rtc_time64_to_tm(bbnsm_ta, &alrm->time);
+
+ regmap_read(bbnsm->regmap, BBNSM_EVENTS, &bbnsm_events);
+ alrm->pending = (bbnsm_events & BBNSM_EVENT_TA) ? 1 : 0;
+
+ return 0;
+}
+
+static int bbnsm_rtc_alarm_irq_enable(struct device *dev, unsigned int enable)
+{
+ struct bbnsm_rtc *bbnsm = dev_get_drvdata(dev);
+
+ /* enable the alarm event */
+ regmap_update_bits(bbnsm->regmap, BBNSM_CTRL, TA_EN_MSK, enable ? TA_EN : TA_DIS);
+ /* enable the alarm interrupt */
+ regmap_update_bits(bbnsm->regmap, BBNSM_INT_EN, TA_EN_MSK, enable ? TA_EN : TA_DIS);
+
+ return 0;
+}
+
+static int bbnsm_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+ struct bbnsm_rtc *bbnsm = dev_get_drvdata(dev);
+ unsigned long time = rtc_tm_to_time64(&alrm->time);
+
+ /* disable the alarm */
+ regmap_update_bits(bbnsm->regmap, BBNSM_CTRL, TA_EN, TA_EN);
+
+ /* write the seconds to TA */
+ regmap_write(bbnsm->regmap, BBNSM_TA, time);
+
+ return bbnsm_rtc_alarm_irq_enable(dev, alrm->enabled);
+}
+
+static const struct rtc_class_ops bbnsm_rtc_ops = {
+ .read_time = bbnsm_rtc_read_time,
+ .set_time = bbnsm_rtc_set_time,
+ .read_alarm = bbnsm_rtc_read_alarm,
+ .set_alarm = bbnsm_rtc_set_alarm,
+ .alarm_irq_enable = bbnsm_rtc_alarm_irq_enable,
+};
+
+static irqreturn_t bbnsm_rtc_irq_handler(int irq, void *dev_id)
+{
+ struct device *dev = dev_id;
+ struct bbnsm_rtc *bbnsm = dev_get_drvdata(dev);
+ u32 val;
+
+ regmap_read(bbnsm->regmap, BBNSM_EVENTS, &val);
+ if (val & BBNSM_EVENT_TA) {
+ bbnsm_rtc_alarm_irq_enable(dev, false);
+ /* clear the alarm event */
+ regmap_write_bits(bbnsm->regmap, BBNSM_EVENTS, TA_EN_MSK, BBNSM_EVENT_TA);
+ rtc_update_irq(bbnsm->rtc, 1, RTC_AF | RTC_IRQF);
+
+ return IRQ_HANDLED;
+ }
+
+ return IRQ_NONE;
+}
+
+static int bbnsm_rtc_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct bbnsm_rtc *bbnsm;
+ int ret;
+
+ bbnsm = devm_kzalloc(&pdev->dev, sizeof(*bbnsm), GFP_KERNEL);
+ if (!bbnsm)
+ return -ENOMEM;
+
+ bbnsm->rtc = devm_rtc_allocate_device(&pdev->dev);
+ if (IS_ERR(bbnsm->rtc))
+ return PTR_ERR(bbnsm->rtc);
+
+ bbnsm->regmap = syscon_node_to_regmap(np->parent);
+ if (IS_ERR(bbnsm->regmap)) {
+ dev_dbg(&pdev->dev, "bbnsm get regmap failed\n");
+ return PTR_ERR(bbnsm->regmap);
+ }
+
+ bbnsm->irq = platform_get_irq(pdev, 0);
+ if (bbnsm->irq < 0)
+ return bbnsm->irq;
+
+ platform_set_drvdata(pdev, bbnsm);
+
+ /* clear all the pending events */
+ regmap_write(bbnsm->regmap, BBNSM_EVENTS, 0x7A);
+
+ device_init_wakeup(&pdev->dev, true);
+ dev_pm_set_wake_irq(&pdev->dev, bbnsm->irq);
+
+ ret = devm_request_irq(&pdev->dev, bbnsm->irq, bbnsm_rtc_irq_handler,
+ IRQF_SHARED, "rtc alarm", &pdev->dev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to request irq %d: %d\n",
+ bbnsm->irq, ret);
+ return ret;
+ }
+
+ bbnsm->rtc->ops = &bbnsm_rtc_ops;
+ bbnsm->rtc->range_max = U32_MAX;
+
+ return devm_rtc_register_device(bbnsm->rtc);
+}
+
+static const struct of_device_id bbnsm_dt_ids[] = {
+ { .compatible = "nxp,imx93-bbnsm-rtc" },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, bbnsm_dt_ids);
+
+static struct platform_driver bbnsm_rtc_driver = {
+ .driver = {
+ .name = "bbnsm_rtc",
+ .of_match_table = bbnsm_dt_ids,
+ },
+ .probe = bbnsm_rtc_probe,
+};
+module_platform_driver(bbnsm_rtc_driver);
+
+MODULE_AUTHOR("Jacky Bai <ping.bai@nxp.com>");
+MODULE_DESCRIPTION("NXP BBNSM RTC Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-pcf2123.c b/drivers/rtc/rtc-pcf2123.c
index e13b5e695d06a..e714661e61a91 100644
--- a/drivers/rtc/rtc-pcf2123.c
+++ b/drivers/rtc/rtc-pcf2123.c
@@ -413,9 +413,14 @@ static int pcf2123_probe(struct spi_device *spi)
/* Register alarm irq */
if (spi->irq > 0) {
+ unsigned long irqflags = IRQF_TRIGGER_LOW;
+
+ if (dev_fwnode(&spi->dev))
+ irqflags = 0;
+
ret = devm_request_threaded_irq(&spi->dev, spi->irq, NULL,
pcf2123_rtc_irq,
- IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ irqflags | IRQF_ONESHOT,
pcf2123_driver.driver.name, &spi->dev);
if (!ret)
device_init_wakeup(&spi->dev, true);
diff --git a/drivers/rtc/rtc-pcf85063.c b/drivers/rtc/rtc-pcf85063.c
index 754e03984f986..71a4563559819 100644
--- a/drivers/rtc/rtc-pcf85063.c
+++ b/drivers/rtc/rtc-pcf85063.c
@@ -621,9 +621,14 @@ static int pcf85063_probe(struct i2c_client *client)
clear_bit(RTC_FEATURE_ALARM, pcf85063->rtc->features);
if (config->has_alarms && client->irq > 0) {
+ unsigned long irqflags = IRQF_TRIGGER_LOW;
+
+ if (dev_fwnode(&client->dev))
+ irqflags = 0;
+
err = devm_request_threaded_irq(&client->dev, client->irq,
NULL, pcf85063_rtc_handle_irq,
- IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ irqflags | IRQF_ONESHOT,
"pcf85063", pcf85063);
if (err) {
dev_warn(&pcf85063->rtc->dev,
diff --git a/drivers/rtc/rtc-pcf8523.c b/drivers/rtc/rtc-pcf8523.c
index 92de99f11a7a5..2e111cdb94f76 100644
--- a/drivers/rtc/rtc-pcf8523.c
+++ b/drivers/rtc/rtc-pcf8523.c
@@ -445,13 +445,18 @@ static int pcf8523_probe(struct i2c_client *client)
clear_bit(RTC_FEATURE_UPDATE_INTERRUPT, rtc->features);
if (client->irq > 0) {
+ unsigned long irqflags = IRQF_TRIGGER_LOW;
+
+ if (dev_fwnode(&client->dev))
+ irqflags = 0;
+
err = regmap_write(pcf8523->regmap, PCF8523_TMR_CLKOUT_CTRL, 0x38);
if (err < 0)
return err;
err = devm_request_threaded_irq(&client->dev, client->irq,
NULL, pcf8523_irq,
- IRQF_SHARED | IRQF_ONESHOT | IRQF_TRIGGER_LOW,
+ IRQF_SHARED | IRQF_ONESHOT | irqflags,
dev_name(&rtc->dev), pcf8523);
if (err)
return err;
diff --git a/drivers/rtc/rtc-pcf85363.c b/drivers/rtc/rtc-pcf85363.c
index c05b722f00605..8958eadf1c3ef 100644
--- a/drivers/rtc/rtc-pcf85363.c
+++ b/drivers/rtc/rtc-pcf85363.c
@@ -101,6 +101,10 @@
#define PIN_IO_INTA_OUT 2
#define PIN_IO_INTA_HIZ 3
+#define OSC_CAP_SEL GENMASK(1, 0)
+#define OSC_CAP_6000 0x01
+#define OSC_CAP_12500 0x02
+
#define STOP_EN_STOP BIT(0)
#define RESET_CPR 0xa4
@@ -117,6 +121,32 @@ struct pcf85x63_config {
unsigned int num_nvram;
};
+static int pcf85363_load_capacitance(struct pcf85363 *pcf85363, struct device_node *node)
+{
+ u32 load = 7000;
+ u8 value = 0;
+
+ of_property_read_u32(node, "quartz-load-femtofarads", &load);
+
+ switch (load) {
+ default:
+ dev_warn(&pcf85363->rtc->dev, "Unknown quartz-load-femtofarads value: %d. Assuming 7000",
+ load);
+ fallthrough;
+ case 7000:
+ break;
+ case 6000:
+ value = OSC_CAP_6000;
+ break;
+ case 12500:
+ value = OSC_CAP_12500;
+ break;
+ }
+
+ return regmap_update_bits(pcf85363->regmap, CTRL_OSCILLATOR,
+ OSC_CAP_SEL, value);
+}
+
static int pcf85363_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
struct pcf85363 *pcf85363 = dev_get_drvdata(dev);
@@ -372,7 +402,7 @@ static int pcf85363_probe(struct i2c_client *client)
.reg_write = pcf85363_nvram_write,
},
};
- int ret, i;
+ int ret, i, err;
if (data)
config = data;
@@ -394,18 +424,28 @@ static int pcf85363_probe(struct i2c_client *client)
if (IS_ERR(pcf85363->rtc))
return PTR_ERR(pcf85363->rtc);
+ err = pcf85363_load_capacitance(pcf85363, client->dev.of_node);
+ if (err < 0)
+ dev_warn(&client->dev, "failed to set xtal load capacitance: %d",
+ err);
+
pcf85363->rtc->ops = &rtc_ops;
pcf85363->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
pcf85363->rtc->range_max = RTC_TIMESTAMP_END_2099;
clear_bit(RTC_FEATURE_ALARM, pcf85363->rtc->features);
if (client->irq > 0) {
+ unsigned long irqflags = IRQF_TRIGGER_LOW;
+
+ if (dev_fwnode(&client->dev))
+ irqflags = 0;
+
regmap_write(pcf85363->regmap, CTRL_FLAGS, 0);
regmap_update_bits(pcf85363->regmap, CTRL_PIN_IO,
PIN_IO_INTA_OUT, PIN_IO_INTAPM);
ret = devm_request_threaded_irq(&client->dev, client->irq,
NULL, pcf85363_rtc_handle_irq,
- IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ irqflags | IRQF_ONESHOT,
"pcf85363", client);
if (ret)
dev_warn(&client->dev, "unable to request IRQ, alarms disabled\n");
diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c
index 0a7fd94784651..7e720472213c7 100644
--- a/drivers/rtc/rtc-pcf8563.c
+++ b/drivers/rtc/rtc-pcf8563.c
@@ -558,9 +558,14 @@ static int pcf8563_probe(struct i2c_client *client)
pcf8563->rtc->set_start_time = true;
if (client->irq > 0) {
+ unsigned long irqflags = IRQF_TRIGGER_LOW;
+
+ if (dev_fwnode(&client->dev))
+ irqflags = 0;
+
err = devm_request_threaded_irq(&client->dev, client->irq,
NULL, pcf8563_irq,
- IRQF_SHARED | IRQF_ONESHOT | IRQF_TRIGGER_LOW,
+ IRQF_SHARED | IRQF_ONESHOT | irqflags,
pcf8563_driver.driver.name, client);
if (err) {
dev_err(&client->dev, "unable to request IRQ %d\n",
diff --git a/drivers/rtc/rtc-pm8xxx.c b/drivers/rtc/rtc-pm8xxx.c
index 716e5d9ad74d1..372494e82f405 100644
--- a/drivers/rtc/rtc-pm8xxx.c
+++ b/drivers/rtc/rtc-pm8xxx.c
@@ -1,8 +1,13 @@
// SPDX-License-Identifier: GPL-2.0-only
-/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
+/*
+ * pm8xxx RTC driver
+ *
+ * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
+ * Copyright (c) 2023, Linaro Limited
*/
#include <linux/of.h>
#include <linux/module.h>
+#include <linux/nvmem-consumer.h>
#include <linux/init.h>
#include <linux/rtc.h>
#include <linux/platform_device.h>
@@ -12,11 +17,7 @@
#include <linux/slab.h>
#include <linux/spinlock.h>
-/* RTC Register offsets from RTC CTRL REG */
-#define PM8XXX_ALARM_CTRL_OFFSET 0x01
-#define PM8XXX_RTC_WRITE_OFFSET 0x02
-#define PM8XXX_RTC_READ_OFFSET 0x06
-#define PM8XXX_ALARM_RW_OFFSET 0x0A
+#include <asm/unaligned.h>
/* RTC_CTRL register bit fields */
#define PM8xxx_RTC_ENABLE BIT(7)
@@ -27,13 +28,13 @@
/**
* struct pm8xxx_rtc_regs - describe RTC registers per PMIC versions
- * @ctrl: base address of control register
- * @write: base address of write register
- * @read: base address of read register
- * @alarm_ctrl: base address of alarm control register
- * @alarm_ctrl2: base address of alarm control2 register
- * @alarm_rw: base address of alarm read-write register
- * @alarm_en: alarm enable mask
+ * @ctrl: address of control register
+ * @write: base address of write registers
+ * @read: base address of read registers
+ * @alarm_ctrl: address of alarm control register
+ * @alarm_ctrl2: address of alarm control2 register
+ * @alarm_rw: base address of alarm read-write registers
+ * @alarm_en: alarm enable mask
*/
struct pm8xxx_rtc_regs {
unsigned int ctrl;
@@ -46,25 +47,135 @@ struct pm8xxx_rtc_regs {
};
/**
- * struct pm8xxx_rtc - rtc driver internal structure
- * @rtc: rtc device for this driver.
- * @regmap: regmap used to access RTC registers
- * @allow_set_time: indicates whether writing to the RTC is allowed
- * @rtc_alarm_irq: rtc alarm irq number.
- * @regs: rtc registers description.
- * @rtc_dev: device structure.
- * @ctrl_reg_lock: spinlock protecting access to ctrl_reg.
+ * struct pm8xxx_rtc - RTC driver internal structure
+ * @rtc: RTC device
+ * @regmap: regmap used to access registers
+ * @allow_set_time: whether the time can be set
+ * @alarm_irq: alarm irq number
+ * @regs: register description
+ * @dev: device structure
+ * @nvmem_cell: nvmem cell for offset
+ * @offset: offset from epoch in seconds
*/
struct pm8xxx_rtc {
struct rtc_device *rtc;
struct regmap *regmap;
bool allow_set_time;
- int rtc_alarm_irq;
+ int alarm_irq;
const struct pm8xxx_rtc_regs *regs;
- struct device *rtc_dev;
- spinlock_t ctrl_reg_lock;
+ struct device *dev;
+ struct nvmem_cell *nvmem_cell;
+ u32 offset;
};
+static int pm8xxx_rtc_read_nvmem_offset(struct pm8xxx_rtc *rtc_dd)
+{
+ size_t len;
+ void *buf;
+ int rc;
+
+ buf = nvmem_cell_read(rtc_dd->nvmem_cell, &len);
+ if (IS_ERR(buf)) {
+ rc = PTR_ERR(buf);
+ dev_dbg(rtc_dd->dev, "failed to read nvmem offset: %d\n", rc);
+ return rc;
+ }
+
+ if (len != sizeof(u32)) {
+ dev_dbg(rtc_dd->dev, "unexpected nvmem cell size %zu\n", len);
+ kfree(buf);
+ return -EINVAL;
+ }
+
+ rtc_dd->offset = get_unaligned_le32(buf);
+
+ kfree(buf);
+
+ return 0;
+}
+
+static int pm8xxx_rtc_write_nvmem_offset(struct pm8xxx_rtc *rtc_dd, u32 offset)
+{
+ u8 buf[sizeof(u32)];
+ int rc;
+
+ put_unaligned_le32(offset, buf);
+
+ rc = nvmem_cell_write(rtc_dd->nvmem_cell, buf, sizeof(buf));
+ if (rc < 0) {
+ dev_dbg(rtc_dd->dev, "failed to write nvmem offset: %d\n", rc);
+ return rc;
+ }
+
+ return 0;
+}
+
+static int pm8xxx_rtc_read_offset(struct pm8xxx_rtc *rtc_dd)
+{
+ if (!rtc_dd->nvmem_cell)
+ return 0;
+
+ return pm8xxx_rtc_read_nvmem_offset(rtc_dd);
+}
+
+static int pm8xxx_rtc_read_raw(struct pm8xxx_rtc *rtc_dd, u32 *secs)
+{
+ const struct pm8xxx_rtc_regs *regs = rtc_dd->regs;
+ u8 value[NUM_8_BIT_RTC_REGS];
+ unsigned int reg;
+ int rc;
+
+ rc = regmap_bulk_read(rtc_dd->regmap, regs->read, value, sizeof(value));
+ if (rc)
+ return rc;
+
+ /*
+ * Read the LSB again and check if there has been a carry over.
+ * If there has, redo the read operation.
+ */
+ rc = regmap_read(rtc_dd->regmap, regs->read, ®);
+ if (rc < 0)
+ return rc;
+
+ if (reg < value[0]) {
+ rc = regmap_bulk_read(rtc_dd->regmap, regs->read, value,
+ sizeof(value));
+ if (rc)
+ return rc;
+ }
+
+ *secs = get_unaligned_le32(value);
+
+ return 0;
+}
+
+static int pm8xxx_rtc_update_offset(struct pm8xxx_rtc *rtc_dd, u32 secs)
+{
+ u32 raw_secs;
+ u32 offset;
+ int rc;
+
+ if (!rtc_dd->nvmem_cell)
+ return -ENODEV;
+
+ rc = pm8xxx_rtc_read_raw(rtc_dd, &raw_secs);
+ if (rc)
+ return rc;
+
+ offset = secs - raw_secs;
+
+ if (offset == rtc_dd->offset)
+ return 0;
+
+ rc = pm8xxx_rtc_write_nvmem_offset(rtc_dd, offset);
+ if (rc)
+ return rc;
+
+ rtc_dd->offset = offset;
+
+ return 0;
+}
+
/*
* Steps to write the RTC registers.
* 1. Disable alarm if enabled.
@@ -74,269 +185,186 @@ struct pm8xxx_rtc {
* 5. Enable rtc if disabled in step 2.
* 6. Enable alarm if disabled in step 1.
*/
-static int pm8xxx_rtc_set_time(struct device *dev, struct rtc_time *tm)
+static int __pm8xxx_rtc_set_time(struct pm8xxx_rtc *rtc_dd, u32 secs)
{
- int rc, i;
- unsigned long secs, irq_flags;
- u8 value[NUM_8_BIT_RTC_REGS], alarm_enabled = 0, rtc_disabled = 0;
- unsigned int ctrl_reg, rtc_ctrl_reg;
- struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev);
const struct pm8xxx_rtc_regs *regs = rtc_dd->regs;
+ u8 value[NUM_8_BIT_RTC_REGS];
+ bool alarm_enabled;
+ int rc;
- if (!rtc_dd->allow_set_time)
- return -ENODEV;
-
- secs = rtc_tm_to_time64(tm);
-
- dev_dbg(dev, "Seconds value to be written to RTC = %lu\n", secs);
-
- for (i = 0; i < NUM_8_BIT_RTC_REGS; i++) {
- value[i] = secs & 0xFF;
- secs >>= 8;
- }
-
- spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags);
+ put_unaligned_le32(secs, value);
- rc = regmap_read(rtc_dd->regmap, regs->alarm_ctrl, &ctrl_reg);
+ rc = regmap_update_bits_check(rtc_dd->regmap, regs->alarm_ctrl,
+ regs->alarm_en, 0, &alarm_enabled);
if (rc)
- goto rtc_rw_fail;
-
- if (ctrl_reg & regs->alarm_en) {
- alarm_enabled = 1;
- ctrl_reg &= ~regs->alarm_en;
- rc = regmap_write(rtc_dd->regmap, regs->alarm_ctrl, ctrl_reg);
- if (rc) {
- dev_err(dev, "Write to RTC Alarm control register failed\n");
- goto rtc_rw_fail;
- }
- }
+ return rc;
- /* Disable RTC H/w before writing on RTC register */
- rc = regmap_read(rtc_dd->regmap, regs->ctrl, &rtc_ctrl_reg);
+ /* Disable RTC */
+ rc = regmap_update_bits(rtc_dd->regmap, regs->ctrl, PM8xxx_RTC_ENABLE, 0);
if (rc)
- goto rtc_rw_fail;
-
- if (rtc_ctrl_reg & PM8xxx_RTC_ENABLE) {
- rtc_disabled = 1;
- rtc_ctrl_reg &= ~PM8xxx_RTC_ENABLE;
- rc = regmap_write(rtc_dd->regmap, regs->ctrl, rtc_ctrl_reg);
- if (rc) {
- dev_err(dev, "Write to RTC control register failed\n");
- goto rtc_rw_fail;
- }
- }
+ return rc;
/* Write 0 to Byte[0] */
rc = regmap_write(rtc_dd->regmap, regs->write, 0);
- if (rc) {
- dev_err(dev, "Write to RTC write data register failed\n");
- goto rtc_rw_fail;
- }
+ if (rc)
+ return rc;
/* Write Byte[1], Byte[2], Byte[3] */
rc = regmap_bulk_write(rtc_dd->regmap, regs->write + 1,
&value[1], sizeof(value) - 1);
- if (rc) {
- dev_err(dev, "Write to RTC write data register failed\n");
- goto rtc_rw_fail;
- }
+ if (rc)
+ return rc;
/* Write Byte[0] */
rc = regmap_write(rtc_dd->regmap, regs->write, value[0]);
- if (rc) {
- dev_err(dev, "Write to RTC write data register failed\n");
- goto rtc_rw_fail;
- }
+ if (rc)
+ return rc;
- /* Enable RTC H/w after writing on RTC register */
- if (rtc_disabled) {
- rtc_ctrl_reg |= PM8xxx_RTC_ENABLE;
- rc = regmap_write(rtc_dd->regmap, regs->ctrl, rtc_ctrl_reg);
- if (rc) {
- dev_err(dev, "Write to RTC control register failed\n");
- goto rtc_rw_fail;
- }
- }
+ /* Enable RTC */
+ rc = regmap_update_bits(rtc_dd->regmap, regs->ctrl, PM8xxx_RTC_ENABLE,
+ PM8xxx_RTC_ENABLE);
+ if (rc)
+ return rc;
if (alarm_enabled) {
- ctrl_reg |= regs->alarm_en;
- rc = regmap_write(rtc_dd->regmap, regs->alarm_ctrl, ctrl_reg);
- if (rc) {
- dev_err(dev, "Write to RTC Alarm control register failed\n");
- goto rtc_rw_fail;
- }
+ rc = regmap_update_bits(rtc_dd->regmap, regs->alarm_ctrl,
+ regs->alarm_en, regs->alarm_en);
+ if (rc)
+ return rc;
}
-rtc_rw_fail:
- spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags);
-
- return rc;
+ return 0;
}
-static int pm8xxx_rtc_read_time(struct device *dev, struct rtc_time *tm)
+static int pm8xxx_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
- int rc;
- u8 value[NUM_8_BIT_RTC_REGS];
- unsigned long secs;
- unsigned int reg;
struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev);
- const struct pm8xxx_rtc_regs *regs = rtc_dd->regs;
+ u32 secs;
+ int rc;
- rc = regmap_bulk_read(rtc_dd->regmap, regs->read, value, sizeof(value));
- if (rc) {
- dev_err(dev, "RTC read data register failed\n");
- return rc;
- }
+ secs = rtc_tm_to_time64(tm);
- /*
- * Read the LSB again and check if there has been a carry over.
- * If there is, redo the read operation.
- */
- rc = regmap_read(rtc_dd->regmap, regs->read, ®);
- if (rc < 0) {
- dev_err(dev, "RTC read data register failed\n");
+ if (rtc_dd->allow_set_time)
+ rc = __pm8xxx_rtc_set_time(rtc_dd, secs);
+ else
+ rc = pm8xxx_rtc_update_offset(rtc_dd, secs);
+
+ if (rc)
return rc;
- }
- if (unlikely(reg < value[0])) {
- rc = regmap_bulk_read(rtc_dd->regmap, regs->read,
- value, sizeof(value));
- if (rc) {
- dev_err(dev, "RTC read data register failed\n");
- return rc;
- }
- }
+ dev_dbg(dev, "set time: %ptRd %ptRt (%u + %u)\n", tm, tm,
+ secs - rtc_dd->offset, rtc_dd->offset);
+ return 0;
+}
- secs = value[0] | (value[1] << 8) | (value[2] << 16) |
- ((unsigned long)value[3] << 24);
+static int pm8xxx_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+ struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev);
+ u32 secs;
+ int rc;
- rtc_time64_to_tm(secs, tm);
+ rc = pm8xxx_rtc_read_raw(rtc_dd, &secs);
+ if (rc)
+ return rc;
- dev_dbg(dev, "secs = %lu, h:m:s == %ptRt, y-m-d = %ptRdr\n", secs, tm, tm);
+ secs += rtc_dd->offset;
+ rtc_time64_to_tm(secs, tm);
+ dev_dbg(dev, "read time: %ptRd %ptRt (%u + %u)\n", tm, tm,
+ secs - rtc_dd->offset, rtc_dd->offset);
return 0;
}
static int pm8xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
{
- int rc, i;
- u8 value[NUM_8_BIT_RTC_REGS];
- unsigned int ctrl_reg;
- unsigned long secs, irq_flags;
struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev);
const struct pm8xxx_rtc_regs *regs = rtc_dd->regs;
+ u8 value[NUM_8_BIT_RTC_REGS];
+ u32 secs;
+ int rc;
secs = rtc_tm_to_time64(&alarm->time);
+ secs -= rtc_dd->offset;
+ put_unaligned_le32(secs, value);
- for (i = 0; i < NUM_8_BIT_RTC_REGS; i++) {
- value[i] = secs & 0xFF;
- secs >>= 8;
- }
-
- spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags);
+ rc = regmap_update_bits(rtc_dd->regmap, regs->alarm_ctrl,
+ regs->alarm_en, 0);
+ if (rc)
+ return rc;
rc = regmap_bulk_write(rtc_dd->regmap, regs->alarm_rw, value,
sizeof(value));
- if (rc) {
- dev_err(dev, "Write to RTC ALARM register failed\n");
- goto rtc_rw_fail;
- }
-
- rc = regmap_read(rtc_dd->regmap, regs->alarm_ctrl, &ctrl_reg);
if (rc)
- goto rtc_rw_fail;
-
- if (alarm->enabled)
- ctrl_reg |= regs->alarm_en;
- else
- ctrl_reg &= ~regs->alarm_en;
+ return rc;
- rc = regmap_write(rtc_dd->regmap, regs->alarm_ctrl, ctrl_reg);
- if (rc) {
- dev_err(dev, "Write to RTC alarm control register failed\n");
- goto rtc_rw_fail;
+ if (alarm->enabled) {
+ rc = regmap_update_bits(rtc_dd->regmap, regs->alarm_ctrl,
+ regs->alarm_en, regs->alarm_en);
+ if (rc)
+ return rc;
}
- dev_dbg(dev, "Alarm Set for h:m:s=%ptRt, y-m-d=%ptRdr\n",
- &alarm->time, &alarm->time);
-rtc_rw_fail:
- spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags);
- return rc;
+ dev_dbg(dev, "set alarm: %ptRd %ptRt\n", &alarm->time, &alarm->time);
+
+ return 0;
}
static int pm8xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
{
- int rc;
- unsigned int ctrl_reg;
- u8 value[NUM_8_BIT_RTC_REGS];
- unsigned long secs;
struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev);
const struct pm8xxx_rtc_regs *regs = rtc_dd->regs;
+ u8 value[NUM_8_BIT_RTC_REGS];
+ unsigned int ctrl_reg;
+ u32 secs;
+ int rc;
rc = regmap_bulk_read(rtc_dd->regmap, regs->alarm_rw, value,
sizeof(value));
- if (rc) {
- dev_err(dev, "RTC alarm time read failed\n");
+ if (rc)
return rc;
- }
-
- secs = value[0] | (value[1] << 8) | (value[2] << 16) |
- ((unsigned long)value[3] << 24);
+ secs = get_unaligned_le32(value);
+ secs += rtc_dd->offset;
rtc_time64_to_tm(secs, &alarm->time);
rc = regmap_read(rtc_dd->regmap, regs->alarm_ctrl, &ctrl_reg);
- if (rc) {
- dev_err(dev, "Read from RTC alarm control register failed\n");
+ if (rc)
return rc;
- }
+
alarm->enabled = !!(ctrl_reg & PM8xxx_RTC_ALARM_ENABLE);
- dev_dbg(dev, "Alarm set for - h:m:s=%ptRt, y-m-d=%ptRdr\n",
- &alarm->time, &alarm->time);
+ dev_dbg(dev, "read alarm: %ptRd %ptRt\n", &alarm->time, &alarm->time);
return 0;
}
static int pm8xxx_rtc_alarm_irq_enable(struct device *dev, unsigned int enable)
{
- int rc;
- unsigned long irq_flags;
struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev);
const struct pm8xxx_rtc_regs *regs = rtc_dd->regs;
- unsigned int ctrl_reg;
u8 value[NUM_8_BIT_RTC_REGS] = {0};
-
- spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags);
-
- rc = regmap_read(rtc_dd->regmap, regs->alarm_ctrl, &ctrl_reg);
- if (rc)
- goto rtc_rw_fail;
+ unsigned int val;
+ int rc;
if (enable)
- ctrl_reg |= regs->alarm_en;
+ val = regs->alarm_en;
else
- ctrl_reg &= ~regs->alarm_en;
+ val = 0;
- rc = regmap_write(rtc_dd->regmap, regs->alarm_ctrl, ctrl_reg);
- if (rc) {
- dev_err(dev, "Write to RTC control register failed\n");
- goto rtc_rw_fail;
- }
+ rc = regmap_update_bits(rtc_dd->regmap, regs->alarm_ctrl,
+ regs->alarm_en, val);
+ if (rc)
+ return rc;
- /* Clear Alarm register */
+ /* Clear alarm register */
if (!enable) {
rc = regmap_bulk_write(rtc_dd->regmap, regs->alarm_rw, value,
sizeof(value));
- if (rc) {
- dev_err(dev, "Clear RTC ALARM register failed\n");
- goto rtc_rw_fail;
- }
+ if (rc)
+ return rc;
}
-rtc_rw_fail:
- spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags);
- return rc;
+ return 0;
}
static const struct rtc_class_ops pm8xxx_rtc_ops = {
@@ -351,69 +379,31 @@ static irqreturn_t pm8xxx_alarm_trigger(int irq, void *dev_id)
{
struct pm8xxx_rtc *rtc_dd = dev_id;
const struct pm8xxx_rtc_regs *regs = rtc_dd->regs;
- unsigned int ctrl_reg;
int rc;
rtc_update_irq(rtc_dd->rtc, 1, RTC_IRQF | RTC_AF);
- spin_lock(&rtc_dd->ctrl_reg_lock);
-
- /* Clear the alarm enable bit */
- rc = regmap_read(rtc_dd->regmap, regs->alarm_ctrl, &ctrl_reg);
- if (rc) {
- spin_unlock(&rtc_dd->ctrl_reg_lock);
- goto rtc_alarm_handled;
- }
-
- ctrl_reg &= ~regs->alarm_en;
-
- rc = regmap_write(rtc_dd->regmap, regs->alarm_ctrl, ctrl_reg);
- if (rc) {
- spin_unlock(&rtc_dd->ctrl_reg_lock);
- dev_err(rtc_dd->rtc_dev,
- "Write to alarm control register failed\n");
- goto rtc_alarm_handled;
- }
-
- spin_unlock(&rtc_dd->ctrl_reg_lock);
-
- /* Clear RTC alarm register */
- rc = regmap_read(rtc_dd->regmap, regs->alarm_ctrl2, &ctrl_reg);
- if (rc) {
- dev_err(rtc_dd->rtc_dev,
- "RTC Alarm control2 register read failed\n");
- goto rtc_alarm_handled;
- }
+ /* Disable alarm */
+ rc = regmap_update_bits(rtc_dd->regmap, regs->alarm_ctrl,
+ regs->alarm_en, 0);
+ if (rc)
+ return IRQ_NONE;
- ctrl_reg |= PM8xxx_RTC_ALARM_CLEAR;
- rc = regmap_write(rtc_dd->regmap, regs->alarm_ctrl2, ctrl_reg);
+ /* Clear alarm status */
+ rc = regmap_update_bits(rtc_dd->regmap, regs->alarm_ctrl2,
+ PM8xxx_RTC_ALARM_CLEAR, 0);
if (rc)
- dev_err(rtc_dd->rtc_dev,
- "Write to RTC Alarm control2 register failed\n");
+ return IRQ_NONE;
-rtc_alarm_handled:
return IRQ_HANDLED;
}
static int pm8xxx_rtc_enable(struct pm8xxx_rtc *rtc_dd)
{
const struct pm8xxx_rtc_regs *regs = rtc_dd->regs;
- unsigned int ctrl_reg;
- int rc;
-
- /* Check if the RTC is on, else turn it on */
- rc = regmap_read(rtc_dd->regmap, regs->ctrl, &ctrl_reg);
- if (rc)
- return rc;
- if (!(ctrl_reg & PM8xxx_RTC_ENABLE)) {
- ctrl_reg |= PM8xxx_RTC_ENABLE;
- rc = regmap_write(rtc_dd->regmap, regs->ctrl, ctrl_reg);
- if (rc)
- return rc;
- }
-
- return 0;
+ return regmap_update_bits(rtc_dd->regmap, regs->ctrl, PM8xxx_RTC_ENABLE,
+ PM8xxx_RTC_ENABLE);
}
static const struct pm8xxx_rtc_regs pm8921_regs = {
@@ -456,9 +446,6 @@ static const struct pm8xxx_rtc_regs pmk8350_regs = {
.alarm_en = BIT(7),
};
-/*
- * Hardcoded RTC bases until IORESOURCE_REG mapping is figured out
- */
static const struct of_device_id pm8xxx_id_table[] = {
{ .compatible = "qcom,pm8921-rtc", .data = &pm8921_regs },
{ .compatible = "qcom,pm8058-rtc", .data = &pm8058_regs },
@@ -470,9 +457,9 @@ MODULE_DEVICE_TABLE(of, pm8xxx_id_table);
static int pm8xxx_rtc_probe(struct platform_device *pdev)
{
- int rc;
- struct pm8xxx_rtc *rtc_dd;
const struct of_device_id *match;
+ struct pm8xxx_rtc *rtc_dd;
+ int rc;
match = of_match_node(pm8xxx_id_table, pdev->dev.of_node);
if (!match)
@@ -482,24 +469,33 @@ static int pm8xxx_rtc_probe(struct platform_device *pdev)
if (rtc_dd == NULL)
return -ENOMEM;
- /* Initialise spinlock to protect RTC control register */
- spin_lock_init(&rtc_dd->ctrl_reg_lock);
-
rtc_dd->regmap = dev_get_regmap(pdev->dev.parent, NULL);
- if (!rtc_dd->regmap) {
- dev_err(&pdev->dev, "Parent regmap unavailable.\n");
+ if (!rtc_dd->regmap)
return -ENXIO;
- }
- rtc_dd->rtc_alarm_irq = platform_get_irq(pdev, 0);
- if (rtc_dd->rtc_alarm_irq < 0)
+ rtc_dd->alarm_irq = platform_get_irq(pdev, 0);
+ if (rtc_dd->alarm_irq < 0)
return -ENXIO;
rtc_dd->allow_set_time = of_property_read_bool(pdev->dev.of_node,
"allow-set-time");
+ rtc_dd->nvmem_cell = devm_nvmem_cell_get(&pdev->dev, "offset");
+ if (IS_ERR(rtc_dd->nvmem_cell)) {
+ rc = PTR_ERR(rtc_dd->nvmem_cell);
+ if (rc != -ENOENT)
+ return rc;
+ rtc_dd->nvmem_cell = NULL;
+ }
+
rtc_dd->regs = match->data;
- rtc_dd->rtc_dev = &pdev->dev;
+ rtc_dd->dev = &pdev->dev;
+
+ if (!rtc_dd->allow_set_time) {
+ rc = pm8xxx_rtc_read_offset(rtc_dd);
+ if (rc)
+ return rc;
+ }
rc = pm8xxx_rtc_enable(rtc_dd);
if (rc)
@@ -509,7 +505,6 @@ static int pm8xxx_rtc_probe(struct platform_device *pdev)
device_init_wakeup(&pdev->dev, 1);
- /* Register the RTC device */
rtc_dd->rtc = devm_rtc_allocate_device(&pdev->dev);
if (IS_ERR(rtc_dd->rtc))
return PTR_ERR(rtc_dd->rtc);
@@ -517,21 +512,18 @@ static int pm8xxx_rtc_probe(struct platform_device *pdev)
rtc_dd->rtc->ops = &pm8xxx_rtc_ops;
rtc_dd->rtc->range_max = U32_MAX;
- /* Request the alarm IRQ */
- rc = devm_request_any_context_irq(&pdev->dev, rtc_dd->rtc_alarm_irq,
+ rc = devm_request_any_context_irq(&pdev->dev, rtc_dd->alarm_irq,
pm8xxx_alarm_trigger,
IRQF_TRIGGER_RISING,
"pm8xxx_rtc_alarm", rtc_dd);
- if (rc < 0) {
- dev_err(&pdev->dev, "Request IRQ failed (%d)\n", rc);
+ if (rc < 0)
return rc;
- }
rc = devm_rtc_register_device(rtc_dd->rtc);
if (rc)
return rc;
- rc = dev_pm_set_wake_irq(&pdev->dev, rtc_dd->rtc_alarm_irq);
+ rc = dev_pm_set_wake_irq(&pdev->dev, rtc_dd->alarm_irq);
if (rc)
return rc;
@@ -559,3 +551,4 @@ MODULE_ALIAS("platform:rtc-pm8xxx");
MODULE_DESCRIPTION("PMIC8xxx RTC driver");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Anirudh Ghayal <aghayal@codeaurora.org>");
+MODULE_AUTHOR("Johan Hovold <johan@kernel.org>");
diff --git a/drivers/rtc/rtc-rv3028.c b/drivers/rtc/rtc-rv3028.c
index b0099e26e3b05..ec5d7a614e2dd 100644
--- a/drivers/rtc/rtc-rv3028.c
+++ b/drivers/rtc/rtc-rv3028.c
@@ -982,6 +982,12 @@ static int rv3028_probe(struct i2c_client *client)
return 0;
}
+static const struct acpi_device_id rv3028_i2c_acpi_match[] = {
+ { "MCRY3028" },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, rv3028_i2c_acpi_match);
+
static const __maybe_unused struct of_device_id rv3028_of_match[] = {
{ .compatible = "microcrystal,rv3028", },
{ }
@@ -991,6 +997,7 @@ MODULE_DEVICE_TABLE(of, rv3028_of_match);
static struct i2c_driver rv3028_driver = {
.driver = {
.name = "rtc-rv3028",
+ .acpi_match_table = rv3028_i2c_acpi_match,
.of_match_table = of_match_ptr(rv3028_of_match),
},
.probe_new = rv3028_probe,
diff --git a/drivers/rtc/rtc-rv3029c2.c b/drivers/rtc/rtc-rv3029c2.c
index e4fdd47ae066c..0852f6709a859 100644
--- a/drivers/rtc/rtc-rv3029c2.c
+++ b/drivers/rtc/rtc-rv3029c2.c
@@ -735,9 +735,14 @@ static int rv3029_probe(struct device *dev, struct regmap *regmap, int irq,
return PTR_ERR(rv3029->rtc);
if (rv3029->irq > 0) {
+ unsigned long irqflags = IRQF_TRIGGER_LOW;
+
+ if (dev_fwnode(dev))
+ irqflags = 0;
+
rc = devm_request_threaded_irq(dev, rv3029->irq,
NULL, rv3029_handle_irq,
- IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ irqflags | IRQF_ONESHOT,
"rv3029", dev);
if (rc) {
dev_warn(dev, "unable to request IRQ, alarms disabled\n");
diff --git a/drivers/rtc/rtc-rv3032.c b/drivers/rtc/rtc-rv3032.c
index c3bee305eacc6..1ff4f2e6fa77e 100644
--- a/drivers/rtc/rtc-rv3032.c
+++ b/drivers/rtc/rtc-rv3032.c
@@ -930,9 +930,14 @@ static int rv3032_probe(struct i2c_client *client)
return PTR_ERR(rv3032->rtc);
if (client->irq > 0) {
+ unsigned long irqflags = IRQF_TRIGGER_LOW;
+
+ if (dev_fwnode(&client->dev))
+ irqflags = 0;
+
ret = devm_request_threaded_irq(&client->dev, client->irq,
NULL, rv3032_handle_irq,
- IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ irqflags | IRQF_ONESHOT,
"rv3032", rv3032);
if (ret) {
dev_warn(&client->dev, "unable to request IRQ, alarms disabled\n");
@@ -975,6 +980,12 @@ static int rv3032_probe(struct i2c_client *client)
return 0;
}
+static const struct acpi_device_id rv3032_i2c_acpi_match[] = {
+ { "MCRY3032" },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, rv3032_i2c_acpi_match);
+
static const __maybe_unused struct of_device_id rv3032_of_match[] = {
{ .compatible = "microcrystal,rv3032", },
{ }
@@ -984,6 +995,7 @@ MODULE_DEVICE_TABLE(of, rv3032_of_match);
static struct i2c_driver rv3032_driver = {
.driver = {
.name = "rtc-rv3032",
+ .acpi_match_table = rv3032_i2c_acpi_match,
.of_match_table = of_match_ptr(rv3032_of_match),
},
.probe_new = rv3032_probe,
diff --git a/drivers/rtc/rtc-rv8803.c b/drivers/rtc/rtc-rv8803.c
index b581b6d5ad731..25c3b9e4f515a 100644
--- a/drivers/rtc/rtc-rv8803.c
+++ b/drivers/rtc/rtc-rv8803.c
@@ -70,6 +70,7 @@ struct rv8803_data {
struct mutex flags_lock;
u8 ctrl;
u8 backup;
+ u8 alarm_invalid:1;
enum rv8803_type type;
};
@@ -165,13 +166,13 @@ static int rv8803_regs_init(struct rv8803_data *rv8803)
static int rv8803_regs_configure(struct rv8803_data *rv8803);
-static int rv8803_regs_reset(struct rv8803_data *rv8803)
+static int rv8803_regs_reset(struct rv8803_data *rv8803, bool full)
{
/*
* The RV-8803 resets all registers to POR defaults after voltage-loss,
* the Epson RTCs don't, so we manually reset the remainder here.
*/
- if (rv8803->type == rx_8803 || rv8803->type == rx_8900) {
+ if (full || rv8803->type == rx_8803 || rv8803->type == rx_8900) {
int ret = rv8803_regs_init(rv8803);
if (ret)
return ret;
@@ -238,6 +239,11 @@ static int rv8803_get_time(struct device *dev, struct rtc_time *tm)
u8 *date = date1;
int ret, flags;
+ if (rv8803->alarm_invalid) {
+ dev_warn(dev, "Corruption detected, data may be invalid.\n");
+ return -EINVAL;
+ }
+
flags = rv8803_read_reg(rv8803->client, RV8803_FLAG);
if (flags < 0)
return flags;
@@ -313,12 +319,19 @@ static int rv8803_set_time(struct device *dev, struct rtc_time *tm)
return flags;
}
- if (flags & RV8803_FLAG_V2F) {
- ret = rv8803_regs_reset(rv8803);
+ if ((flags & RV8803_FLAG_V2F) || rv8803->alarm_invalid) {
+ /*
+ * If we sense corruption in the alarm registers, but see no
+ * voltage loss flag, we can't rely on other registers having
+ * sensible values. Reset them fully.
+ */
+ ret = rv8803_regs_reset(rv8803, rv8803->alarm_invalid);
if (ret) {
mutex_unlock(&rv8803->flags_lock);
return ret;
}
+
+ rv8803->alarm_invalid = false;
}
ret = rv8803_write_reg(rv8803->client, RV8803_FLAG,
@@ -344,15 +357,33 @@ static int rv8803_get_alarm(struct device *dev, struct rtc_wkalrm *alrm)
if (flags < 0)
return flags;
+ alarmvals[0] &= 0x7f;
+ alarmvals[1] &= 0x3f;
+ alarmvals[2] &= 0x3f;
+
+ if (!bcd_is_valid(alarmvals[0]) ||
+ !bcd_is_valid(alarmvals[1]) ||
+ !bcd_is_valid(alarmvals[2]))
+ goto err_invalid;
+
alrm->time.tm_sec = 0;
- alrm->time.tm_min = bcd2bin(alarmvals[0] & 0x7f);
- alrm->time.tm_hour = bcd2bin(alarmvals[1] & 0x3f);
- alrm->time.tm_mday = bcd2bin(alarmvals[2] & 0x3f);
+ alrm->time.tm_min = bcd2bin(alarmvals[0]);
+ alrm->time.tm_hour = bcd2bin(alarmvals[1]);
+ alrm->time.tm_mday = bcd2bin(alarmvals[2]);
alrm->enabled = !!(rv8803->ctrl & RV8803_CTRL_AIE);
alrm->pending = (flags & RV8803_FLAG_AF) && alrm->enabled;
+ if ((unsigned int)alrm->time.tm_mday > 31 ||
+ (unsigned int)alrm->time.tm_hour >= 24 ||
+ (unsigned int)alrm->time.tm_min >= 60)
+ goto err_invalid;
+
return 0;
+
+err_invalid:
+ rv8803->alarm_invalid = true;
+ return -EINVAL;
}
static int rv8803_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
@@ -641,9 +672,14 @@ static int rv8803_probe(struct i2c_client *client)
return PTR_ERR(rv8803->rtc);
if (client->irq > 0) {
+ unsigned long irqflags = IRQF_TRIGGER_LOW;
+
+ if (dev_fwnode(&client->dev))
+ irqflags = 0;
+
err = devm_request_threaded_irq(&client->dev, client->irq,
NULL, rv8803_handle_irq,
- IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ irqflags | IRQF_ONESHOT,
"rv8803", client);
if (err) {
dev_warn(&client->dev, "unable to request IRQ, alarms disabled\n");
diff --git a/drivers/rtc/rtc-rx6110.c b/drivers/rtc/rtc-rx6110.c
index 76a49838014ba..37608883a796d 100644
--- a/drivers/rtc/rtc-rx6110.c
+++ b/drivers/rtc/rtc-rx6110.c
@@ -10,7 +10,6 @@
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/of_gpio.h>
#include <linux/regmap.h>
#include <linux/rtc.h>
#include <linux/of.h>
diff --git a/drivers/rtc/rtc-rx8010.c b/drivers/rtc/rtc-rx8010.c
index d090565707390..b9c8dad262085 100644
--- a/drivers/rtc/rtc-rx8010.c
+++ b/drivers/rtc/rtc-rx8010.c
@@ -394,10 +394,14 @@ static int rx8010_probe(struct i2c_client *client)
return PTR_ERR(rx8010->rtc);
if (client->irq > 0) {
- dev_info(dev, "IRQ %d supplied\n", client->irq);
+ unsigned long irqflags = IRQF_TRIGGER_LOW;
+
+ if (dev_fwnode(&client->dev))
+ irqflags = 0;
+
err = devm_request_threaded_irq(dev, client->irq, NULL,
rx8010_irq_1_handler,
- IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ irqflags | IRQF_ONESHOT,
"rx8010", client);
if (err) {
dev_err(dev, "unable to request IRQ\n");
diff --git a/drivers/rtc/rtc-sun6i.c b/drivers/rtc/rtc-sun6i.c
index ed5516089e9a0..7038f47d77ff4 100644
--- a/drivers/rtc/rtc-sun6i.c
+++ b/drivers/rtc/rtc-sun6i.c
@@ -136,7 +136,6 @@ struct sun6i_rtc_clk_data {
unsigned int fixed_prescaler : 16;
unsigned int has_prescaler : 1;
unsigned int has_out_clk : 1;
- unsigned int export_iosc : 1;
unsigned int has_losc_en : 1;
unsigned int has_auto_swt : 1;
};
@@ -271,10 +270,8 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
/* Yes, I know, this is ugly. */
sun6i_rtc = rtc;
- /* Only read IOSC name from device tree if it is exported */
- if (rtc->data->export_iosc)
- of_property_read_string_index(node, "clock-output-names", 2,
- &iosc_name);
+ of_property_read_string_index(node, "clock-output-names", 2,
+ &iosc_name);
rtc->int_osc = clk_hw_register_fixed_rate_with_accuracy(NULL,
iosc_name,
@@ -315,13 +312,10 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
goto err_register;
}
- clk_data->num = 2;
+ clk_data->num = 3;
clk_data->hws[0] = &rtc->hw;
clk_data->hws[1] = __clk_get_hw(rtc->ext_losc);
- if (rtc->data->export_iosc) {
- clk_data->hws[2] = rtc->int_osc;
- clk_data->num = 3;
- }
+ clk_data->hws[2] = rtc->int_osc;
of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
return;
@@ -361,7 +355,6 @@ static const struct sun6i_rtc_clk_data sun8i_h3_rtc_data = {
.fixed_prescaler = 32,
.has_prescaler = 1,
.has_out_clk = 1,
- .export_iosc = 1,
};
static void __init sun8i_h3_rtc_clk_init(struct device_node *node)
@@ -379,7 +372,6 @@ static const struct sun6i_rtc_clk_data sun50i_h6_rtc_data = {
.fixed_prescaler = 32,
.has_prescaler = 1,
.has_out_clk = 1,
- .export_iosc = 1,
.has_losc_en = 1,
.has_auto_swt = 1,
};
diff --git a/include/linux/bcd.h b/include/linux/bcd.h
index 118bea36d7d49..abbc8149178e6 100644
--- a/include/linux/bcd.h
+++ b/include/linux/bcd.h
@@ -14,8 +14,12 @@
const_bin2bcd(x) : \
_bin2bcd(x))
+#define bcd_is_valid(x) \
+ const_bcd_is_valid(x)
+
#define const_bcd2bin(x) (((x) & 0x0f) + ((x) >> 4) * 10)
#define const_bin2bcd(x) ((((x) / 10) << 4) + (x) % 10)
+#define const_bcd_is_valid(x) (((x) & 0x0f) < 10 && ((x) >> 4) < 10)
unsigned _bcd2bin(unsigned char val) __attribute_const__;
unsigned char _bin2bcd(unsigned val) __attribute_const__;