Merge tag 'rtc-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git…

…/abelloni/linux

Pull RTC updates from Alexandre Belloni:
 "Core:
   - Fix rtctest error path

  New drivers:
   - Microcrystal RV8803

  Subsystem wide cleanups:
   - remove misuse of IRQF_NO_SUSPEND flag

  Drivers:
   - at91rm9200: clear RTC alarm status flag prior to suspending
   - davinci: remove incorrect reference to probe function
   - ds1307: Fix alarm programming for mcp794xx
   - ds1390: trickle charger support, fix ds1390_get_reg
   - isl1208: Pass the IRQF_ONESHOT flag
   - opal: fix type of token
   - pcf2127: fix RTC_READ_VL, remove useless driver version
   - pcf85063: return an error when date is invalid
   - pcf8563: add CLKOUT to common clock framework
   - rx8025: remove unnecessary braces
   - s3c: Set year, month, day value for setting alarm
   - stmp3xxx: unify register access macros
   - License fixes: pcf2127, da9063
   - wakeup-source support for isl12057 and opal"

* tag 'rtc-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (23 commits)
  rtc: Add a driver for Micro Crystal RV8803
  rtc: s3c: Set year, month, day value for setting alarm
  rtc: ds1307: Fix alarm programming for mcp794xx
  rtc: isl12057: enable support for the standard "wakeup-source" property
  rtc: opal: enable support for the stardard "wakeup-source" property
  rtc: isl1208: Pass the IRQF_ONESHOT flag
  rtc: pcf8563: add CLKOUT to common clock framework
  rtc: davinci: remove incorrect reference to probe function
  rtc: at91rm9200: clear RTC alarm status flag prior to suspending
  rtc: pcf2127: remove useless driver version
  rtc: pcf2127: fix reading uninitialized value on RTC_READ_VL ioctl
  rtc: stmp3xxx: unify register access macros
  rtc: da9063: GPL copyright inconsistency fix
  rtc: pcf85063: return an error when date is invalid
  rtc: rx8025: remove unnecessary braces
  rtc: ds1343: remove misuse of IRQF_NO_SUSPEND flag
  rtc: ab8500: remove misuse of IRQF_NO_SUSPEND flag
  rtc: pl031: remove misuse of IRQF_NO_SUSPEND flag
  rtc: opal: fix type of token
  rtc: ds1390: Add trickle charger device tree binding
  ...

Documentation/devicetree/bindings/rtc/dallas,ds1390.txt

@@ -0,0 +1,18 @@
+* Dallas DS1390		SPI Serial Real-Time Clock
+
+Required properties:
+- compatible: Should contain "dallas,ds1390".
+- reg: SPI address for chip
+
+Optional properties:
+- trickle-resistor-ohms : Selected resistor for trickle charger
+	Values usable for ds1390 are 250, 2000, 4000
+	Should be given if trickle charger should be enabled
+- trickle-diode-disable : Do not use internal trickle charger diode
+	Should be given if internal trickle charger diode should be disabled
+Example:
+	ds1390: rtc@68 {
+		compatible = "dallas,ds1390";
+		trickle-resistor-ohms = <250>;
+		reg = <0>;
+	};

Documentation/devicetree/bindings/rtc/pcf8563.txt

@@ -0,0 +1,25 @@
+* Philips PCF8563/Epson RTC8564 Real Time Clock
+
+Philips PCF8563/Epson RTC8564 Real Time Clock
+
+Required properties:
+see: Documentation/devicetree/bindings/i2c/trivial-devices.txt
+
+Optional property:
+- #clock-cells: Should be 0.
+- clock-output-names:
+  overwrite the default clock name "pcf8563-clkout"
+
+Example:
+
+pcf8563: pcf8563@51 {
+	compatible = "nxp,pcf8563";
+	reg = <0x51>;
+	#clock-cells = <0>;
+};
+
+device {
+...
+	clocks = <&pcf8563>;
+...
+};

drivers/rtc/Kconfig

@@ -593,6 +593,15 @@ config RTC_DRV_RV3029C2
 	  This driver can also be built as a module. If so, the module
 	  will be called rtc-rv3029c2.
 
+config RTC_DRV_RV8803
+	tristate "Micro Crystal RV8803"
+	help
+	  If you say yes here you get support for the Micro Crystal
+	  RV8803 RTC chips.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called rtc-rv8803.
+
 config RTC_DRV_S5M
 	tristate "Samsung S2M/S5M series"
 	depends on MFD_SEC_CORE
@@ -666,8 +675,8 @@ config RTC_DRV_DS1390
 	  If you say yes here you get support for the
 	  Dallas/Maxim DS1390/93/94 chips.
 
-	  This driver only supports the RTC feature, and not other chip
-	  features such as alarms and trickle charging.
+	  This driver supports the RTC feature and trickle charging but not
+	  other chip features such as alarms.
 
 	  This driver can also be built as a module. If so, the module
 	  will be called rtc-ds1390.

drivers/rtc/Makefile

@@ -126,6 +126,7 @@ obj-$(CONFIG_RTC_DRV_RS5C313)	+= rtc-rs5c313.o
 obj-$(CONFIG_RTC_DRV_RS5C348)	+= rtc-rs5c348.o
 obj-$(CONFIG_RTC_DRV_RS5C372)	+= rtc-rs5c372.o
 obj-$(CONFIG_RTC_DRV_RV3029C2)	+= rtc-rv3029c2.o
+obj-$(CONFIG_RTC_DRV_RV8803)	+= rtc-rv8803.o
 obj-$(CONFIG_RTC_DRV_RX4581)	+= rtc-rx4581.o
 obj-$(CONFIG_RTC_DRV_RX8025)	+= rtc-rx8025.o
 obj-$(CONFIG_RTC_DRV_RX8581)	+= rtc-rx8581.o

drivers/rtc/rtc-ab8500.c

@@ -18,6 +18,7 @@
 #include <linux/mfd/abx500/ab8500.h>
 #include <linux/delay.h>
 #include <linux/of.h>
+#include <linux/pm_wakeirq.h>
 
 #define AB8500_RTC_SOFF_STAT_REG	0x00
 #define AB8500_RTC_CC_CONF_REG		0x01
@@ -493,11 +494,12 @@ static int ab8500_rtc_probe(struct platform_device *pdev)
 	}
 
 	err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
-			rtc_alarm_handler, IRQF_NO_SUSPEND | IRQF_ONESHOT,
+			rtc_alarm_handler, IRQF_ONESHOT,
 			"ab8500-rtc", rtc);
 	if (err < 0)
 		return err;
 
+	dev_pm_set_wake_irq(&pdev->dev, irq);
 	platform_set_drvdata(pdev, rtc);
 
 	err = ab8500_sysfs_rtc_register(&pdev->dev);
@@ -513,6 +515,8 @@ static int ab8500_rtc_probe(struct platform_device *pdev)
 
 static int ab8500_rtc_remove(struct platform_device *pdev)
 {
+	dev_pm_clear_wake_irq(&pdev->dev);
+	device_init_wakeup(&pdev->dev, false);
 	ab8500_sysfs_rtc_unregister(&pdev->dev);
 
 	return 0;

drivers/rtc/rtc-at91rm9200.c

@@ -495,6 +495,8 @@ static int at91_rtc_suspend(struct device *dev)
 	/* this IRQ is shared with DBGU and other hardware which isn't
 	 * necessarily doing PM like we are...
 	 */
+	at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM);
+
 	at91_rtc_imr = at91_rtc_read_imr()
 			& (AT91_RTC_ALARM|AT91_RTC_SECEV);
 	if (at91_rtc_imr) {

drivers/rtc/rtc-da9063.c

@@ -1,15 +1,15 @@
 /* rtc-da9063.c - Real time clock device driver for DA9063
- * Copyright (C) 2013-14  Dialog Semiconductor Ltd.
+ * Copyright (C) 2013-2015  Dialog Semiconductor Ltd.
  *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
  *
- * This library is distributed in the hope that it will be useful,
+ * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Library General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  */
 
 #include <linux/delay.h>
@@ -516,5 +516,5 @@ module_platform_driver(da9063_rtc_driver);
 
 MODULE_AUTHOR("S Twiss <stwiss.opensource@diasemi.com>");
 MODULE_DESCRIPTION("Real time clock device driver for Dialog DA9063");
-MODULE_LICENSE("GPL v2");
+MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:" DA9063_DRVNAME_RTC);

drivers/rtc/rtc-davinci.c

@@ -546,7 +546,6 @@ static int __exit davinci_rtc_remove(struct platform_device *pdev)
 }
 
 static struct platform_driver davinci_rtc_driver = {
-	.probe		= davinci_rtc_probe,
 	.remove		= __exit_p(davinci_rtc_remove),
 	.driver		= {
 		.name = "rtc_davinci",

drivers/rtc/rtc-ds1307.c

@@ -718,9 +718,9 @@ static int mcp794xx_set_alarm(struct device *dev, struct rtc_wkalrm *t)
 	regs[3] = bin2bcd(t->time.tm_sec);
 	regs[4] = bin2bcd(t->time.tm_min);
 	regs[5] = bin2bcd(t->time.tm_hour);
-	regs[6] = bin2bcd(t->time.tm_wday) + 1;
+	regs[6] = bin2bcd(t->time.tm_wday + 1);
 	regs[7] = bin2bcd(t->time.tm_mday);
-	regs[8] = bin2bcd(t->time.tm_mon) + 1;
+	regs[8] = bin2bcd(t->time.tm_mon + 1);
 
 	/* Clear the alarm 0 interrupt flag. */
 	regs[6] &= ~MCP794XX_BIT_ALMX_IF;

drivers/rtc/rtc-ds1343.c

@@ -21,6 +21,7 @@
 #include <linux/rtc.h>
 #include <linux/bcd.h>
 #include <linux/pm.h>
+#include <linux/pm_wakeirq.h>
 #include <linux/slab.h>
 
 #define DS1343_DRV_VERSION	"01.00"
@@ -663,15 +664,15 @@ static int ds1343_probe(struct spi_device *spi)
 
 	if (priv->irq >= 0) {
 		res = devm_request_threaded_irq(&spi->dev, spi->irq, NULL,
-						ds1343_thread,
-						IRQF_NO_SUSPEND | IRQF_ONESHOT,
+						ds1343_thread, IRQF_ONESHOT,
 						"ds1343", priv);
 		if (res) {
 			priv->irq = -1;
 			dev_err(&spi->dev,
 				"unable to request irq for rtc ds1343\n");
 		} else {
-			device_set_wakeup_capable(&spi->dev, 1);
+			device_init_wakeup(&spi->dev, true);
+			dev_pm_set_wake_irq(&spi->dev, spi->irq);
 		}
 	}
 
@@ -692,6 +693,8 @@ static int ds1343_remove(struct spi_device *spi)
 		priv->irqen &= ~RTC_AF;
 		mutex_unlock(&priv->mutex);
 
+		dev_pm_clear_wake_irq(&spi->dev);
+		device_init_wakeup(&spi->dev, false);
 		devm_free_irq(&spi->dev, spi->irq, priv);
 	}
 

drivers/rtc/rtc-ds1390.c

@@ -20,6 +20,7 @@
 #include <linux/spi/spi.h>
 #include <linux/bcd.h>
 #include <linux/slab.h>
+#include <linux/of.h>
 
 #define DS1390_REG_100THS		0x00
 #define DS1390_REG_SECONDS		0x01
@@ -40,11 +41,31 @@
 #define DS1390_REG_STATUS		0x0E
 #define DS1390_REG_TRICKLE		0x0F
 
+#define DS1390_TRICKLE_CHARGER_ENABLE	0xA0
+#define DS1390_TRICKLE_CHARGER_250_OHM	0x01
+#define DS1390_TRICKLE_CHARGER_2K_OHM	0x02
+#define DS1390_TRICKLE_CHARGER_4K_OHM	0x03
+#define DS1390_TRICKLE_CHARGER_NO_DIODE	0x04
+#define DS1390_TRICKLE_CHARGER_DIODE	0x08
+
 struct ds1390 {
 	struct rtc_device *rtc;
 	u8 txrx_buf[9];	/* cmd + 8 registers */
 };
 
+static void ds1390_set_reg(struct device *dev, unsigned char address,
+			   unsigned char data)
+{
+	struct spi_device *spi = to_spi_device(dev);
+	unsigned char buf[2];
+
+	/* MSB must be '1' to write */
+	buf[0] = address | 0x80;
+	buf[1] = data;
+
+	spi_write(spi, buf, 2);
+}
+
 static int ds1390_get_reg(struct device *dev, unsigned char address,
 				unsigned char *data)
 {
@@ -62,11 +83,50 @@ static int ds1390_get_reg(struct device *dev, unsigned char address,
 	if (status != 0)
 		return status;
 
-	*data = chip->txrx_buf[1];
+	*data = chip->txrx_buf[0];
 
 	return 0;
 }
 
+static void ds1390_trickle_of_init(struct spi_device *spi)
+{
+	u32 ohms = 0;
+	u8 value;
+
+	if (of_property_read_u32(spi->dev.of_node, "trickle-resistor-ohms",
+				 &ohms))
+		goto out;
+
+	/* Enable charger */
+	value = DS1390_TRICKLE_CHARGER_ENABLE;
+	if (of_property_read_bool(spi->dev.of_node, "trickle-diode-disable"))
+		value |= DS1390_TRICKLE_CHARGER_NO_DIODE;
+	else
+		value |= DS1390_TRICKLE_CHARGER_DIODE;
+
+	/* Resistor select */
+	switch (ohms) {
+	case 250:
+		value |= DS1390_TRICKLE_CHARGER_250_OHM;
+		break;
+	case 2000:
+		value |= DS1390_TRICKLE_CHARGER_2K_OHM;
+		break;
+	case 4000:
+		value |= DS1390_TRICKLE_CHARGER_4K_OHM;
+		break;
+	default:
+		dev_warn(&spi->dev,
+			 "Unsupported ohm value %02ux in dt\n", ohms);
+		return;
+	}
+
+	ds1390_set_reg(&spi->dev, DS1390_REG_TRICKLE, value);
+
+out:
+	return;
+}
+
 static int ds1390_read_time(struct device *dev, struct rtc_time *dt)
 {
 	struct spi_device *spi = to_spi_device(dev);
@@ -143,6 +203,9 @@ static int ds1390_probe(struct spi_device *spi)
 		return res;
 	}
 
+	if (spi->dev.of_node)
+		ds1390_trickle_of_init(spi);
+
 	chip->rtc = devm_rtc_device_register(&spi->dev, "ds1390",
 					&ds1390_rtc_ops, THIS_MODULE);
 	if (IS_ERR(chip->rtc)) {

drivers/rtc/rtc-isl12057.c

@@ -466,9 +466,8 @@ static int isl12057_check_rtc_status(struct device *dev, struct regmap *regmap)
  * is for instance the case on ReadyNAS 102, 104 and 2120. On those
  * devices with no IRQ driectly connected to the SoC, the RTC chip
  * can be forced as a wakeup source by stating that explicitly in
- * the device's .dts file using the "isil,irq2-can-wakeup-machine"
- * boolean property. This will guarantee 'wakealarm' sysfs entry is
- * available on the device.
+ * the device's .dts file using the "wakeup-source" boolean property.
+ * This will guarantee 'wakealarm' sysfs entry is available on the device.
  *
  * The function below returns 1, i.e. the capability of the chip to
  * wakeup the device, based on IRQ availability or if the boolean
@@ -479,8 +478,9 @@ static bool isl12057_can_wakeup_machine(struct device *dev)
 {
 	struct isl12057_rtc_data *data = dev_get_drvdata(dev);
 
-	return (data->irq || of_property_read_bool(dev->of_node,
-					      "isil,irq2-can-wakeup-machine"));
+	return data->irq || of_property_read_bool(dev->of_node, "wakeup-source")
+		|| of_property_read_bool(dev->of_node, /* legacy */
+					 "isil,irq2-can-wakeup-machine");
 }
 #else
 static bool isl12057_can_wakeup_machine(struct device *dev)

drivers/rtc/rtc-isl1208.c

@@ -638,7 +638,7 @@ isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id)
 	if (client->irq > 0) {
 		rc = devm_request_threaded_irq(&client->dev, client->irq, NULL,
 					       isl1208_rtc_interrupt,
-					       IRQF_SHARED,
+					       IRQF_SHARED | IRQF_ONESHOT,
 					       isl1208_driver.driver.name,
 					       client);
 		if (!rc) {

drivers/rtc/rtc-opal.c

@@ -152,10 +152,10 @@ static int opal_get_tpo_time(struct device *dev, struct rtc_wkalrm *alarm)
 /* Set Timed Power-On */
 static int opal_set_tpo_time(struct device *dev, struct rtc_wkalrm *alarm)
 {
-	u64 h_m_s_ms = 0, token;
+	u64 h_m_s_ms = 0;
 	struct opal_msg msg;
 	u32 y_m_d = 0;
-	int rc;
+	int token, rc;
 
 	tm_to_opal(&alarm->time, &y_m_d, &h_m_s_ms);
 
@@ -199,8 +199,9 @@ static int opal_rtc_probe(struct platform_device *pdev)
 {
 	struct rtc_device *rtc;
 
-	if (pdev->dev.of_node && of_get_property(pdev->dev.of_node, "has-tpo",
-						 NULL)) {
+	if (pdev->dev.of_node &&
+	    (of_property_read_bool(pdev->dev.of_node, "wakeup-source") ||
+	     of_property_read_bool(pdev->dev.of_node, "has-tpo")/* legacy */)) {
 		device_set_wakeup_capable(&pdev->dev, true);
 		opal_rtc_ops.read_alarm	= opal_get_tpo_time;
 		opal_rtc_ops.set_alarm = opal_set_tpo_time;