Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/…

…linux/kernel/git/tip/tip into next Pull timer core updates from Thomas Gleixner: "This time you get nothing really exciting: - A huge update to the sh* clocksource drivers - Support for two more ARM SoCs - Removal of the deprecated setup_sched_clock() API - The usual pile of fixlets all over the place" * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits) clocksource: Add Freescale FlexTimer Module (FTM) timer support ARM: dts: vf610: Add Freescale FlexTimer Module timer node. clocksource: ftm: Add FlexTimer Module (FTM) Timer devicetree Documentation clocksource: sh_tmu: Remove unnecessary OOM messages clocksource: sh_mtu2: Remove unnecessary OOM messages clocksource: sh_cmt: Remove unnecessary OOM messages clocksource: em_sti: Remove unnecessary OOM messages clocksource: dw_apb_timer_of: Do not trace read_sched_clock clocksource: Fix clocksource_mmio_readX_down clocksource: Fix type confusion for clocksource_mmio_readX_Y clocksource: sh_tmu: Fix channel IRQ retrieval in legacy case clocksource: qcom: Implement read_current_timer for udelay ntp: Make is_error_status() use its argument ntp: Convert simple_strtol to kstrtol timer_stats/doc: Fix /proc/timer_stats documentation sched_clock: Remove deprecated setup_sched_clock() API ARM: sun6i: a31: Add support for the High Speed Timers clocksource: sun5i: Add support for reset controller clocksource: efm32: use $vendor,$device scheme for compatible string KConfig: Vexpress: build the ARM_GLOBAL_TIMER with vexpress platform ...
git-mirror · Jun 4, 2014 · 82e627e · 82e627e
2 parents f1a7cd0 + 331b483
commit 82e627e
Show file tree

Hide file tree

Showing 25 changed files with 496 additions and 50 deletions.
diff --git a/Documentation/devicetree/bindings/arm/global_timer.txt b/Documentation/devicetree/bindings/arm/global_timer.txt
@@ -4,8 +4,11 @@
 
 ** Timer node required properties:
 
-- compatible : Should be "arm,cortex-a9-global-timer"
-		Driver supports versions r2p0 and above.
+- compatible : should contain
+	     * "arm,cortex-a5-global-timer" for Cortex-A5 global timers.
+	     * "arm,cortex-a9-global-timer" for Cortex-A9 global
+	         timers or any compatible implementation. Note: driver
+	         supports versions r2p0 and above.
 
 - interrupts : One interrupt to each core
 

diff --git a/Documentation/devicetree/bindings/timer/allwinner,sun5i-a13-hstimer.txt b/Documentation/devicetree/bindings/timer/allwinner,sun5i-a13-hstimer.txt
@@ -9,6 +9,9 @@ Required properties:
 		one)
 - clocks: phandle to the source clock (usually the AHB clock)
 
+Optionnal properties:
+- resets: phandle to a reset controller asserting the timer
+
 Example:
 
 timer@01c60000 {
@@ -19,4 +22,5 @@ timer@01c60000 {
 		     <0 53 1>,
 		     <0 54 1>;
 	clocks = <&ahb1_gates 19>;
+	resets = <&ahb1rst 19>;
 };
diff --git a/...devicetree/bindings/timer/efm32,timer.txt → ...indings/timer/energymicro,efm32-timer.txt b/...devicetree/bindings/timer/efm32,timer.txt → ...indings/timer/energymicro,efm32-timer.txt
@@ -6,7 +6,7 @@ channels and can be used as PWM or Quadrature Decoder. Available clock sources
 are the cpu's HFPERCLK (with a 10-bit prescaler) or an external pin.
 
 Required properties:
-- compatible : Should be efm32,timer
+- compatible : Should be "energymicro,efm32-timer"
 - reg : Address and length of the register set
 - clocks : Should contain a reference to the HFPERCLK
 
@@ -16,7 +16,7 @@ Optional properties:
 Example:
 
 timer@40010c00 {
-	compatible = "efm32,timer";
+	compatible = "energymicro,efm32-timer";
 	reg = <0x40010c00 0x400>;
 	interrupts = <14>;
 	clocks = <&cmu clk_HFPERCLKTIMER3>;

diff --git a/Documentation/devicetree/bindings/timer/fsl,ftm-timer.txt b/Documentation/devicetree/bindings/timer/fsl,ftm-timer.txt
@@ -0,0 +1,31 @@
+Freescale FlexTimer Module (FTM) Timer
+
+Required properties:
+
+- compatible : should be "fsl,ftm-timer"
+- reg : Specifies base physical address and size of the register sets for the
+  clock event device and clock source device.
+- interrupts : Should be the clock event device interrupt.
+- clocks : The clocks provided by the SoC to drive the timer, must contain an
+  entry for each entry in clock-names.
+- clock-names : Must include the following entries:
+  o "ftm-evt"
+  o "ftm-src"
+  o "ftm-evt-counter-en"
+  o "ftm-src-counter-en"
+- big-endian: One boolean property, the big endian mode will be in use if it is
+  present, or the little endian mode will be in use for all the device registers.
+
+Example:
+ftm: ftm@400b8000 {
+	compatible = "fsl,ftm-timer";
+	reg = <0x400b8000 0x1000 0x400b9000 0x1000>;
+	interrupts = <0 44 IRQ_TYPE_LEVEL_HIGH>;
+	clock-names = "ftm-evt", "ftm-src",
+		"ftm-evt-counter-en", "ftm-src-counter-en";
+	clocks = <&clks VF610_CLK_FTM2>,
+		<&clks VF610_CLK_FTM3>,
+		<&clks VF610_CLK_FTM2_EXT_FIX_EN>,
+		<&clks VF610_CLK_FTM3_EXT_FIX_EN>;
+	big-endian;
+};
diff --git a/Documentation/timers/timer_stats.txt b/Documentation/timers/timer_stats.txt
@@ -39,9 +39,9 @@ To stop a sample period issue:
 The statistics can be retrieved by:
 # cat /proc/timer_stats
 
-The readout of /proc/timer_stats automatically disables sampling. The sampled
-information is kept until a new sample period is started. This allows multiple
-readouts.
+While sampling is enabled, each readout from /proc/timer_stats will see
+newly updated statistics. Once sampling is disabled, the sampled information
+is kept until a new sample period is started. This allows multiple readouts.
 
 Sample output of /proc/timer_stats:
 

diff --git a/arch/arm/boot/dts/sun6i-a31.dtsi b/arch/arm/boot/dts/sun6i-a31.dtsi
@@ -621,6 +621,17 @@
 			status = "disabled";
 		};
 
+		timer@01c60000 {
+			compatible = "allwinner,sun6i-a31-hstimer", "allwinner,sun7i-a20-hstimer";
+			reg = <0x01c60000 0x1000>;
+			interrupts = <0 51 4>,
+				     <0 52 4>,
+				     <0 53 4>,
+				     <0 54 4>;
+			clocks = <&ahb1_gates 19>;
+			resets = <&ahb1_rst 19>;
+		};
+
 		spi0: spi@01c68000 {
 			compatible = "allwinner,sun6i-a31-spi";
 			reg = <0x01c68000 0x1000>;

diff --git a/arch/arm/boot/dts/vexpress-v2p-ca5s.dts b/arch/arm/boot/dts/vexpress-v2p-ca5s.dts
@@ -88,6 +88,14 @@
 		interrupts = <1 13 0x304>;
 	};
 
+	timer@2c000200 {
+		compatible = "arm,cortex-a5-global-timer",
+		             "arm,cortex-a9-global-timer";
+		reg = <0x2c000200 0x20>;
+		interrupts = <1 11 0x304>;
+		clocks = <&oscclk0>;
+	};
+
 	watchdog@2c000620 {
 		compatible = "arm,cortex-a5-twd-wdt";
 		reg = <0x2c000620 0x20>;
@@ -120,7 +128,7 @@
 		compatible = "arm,vexpress,config-bus";
 		arm,vexpress,config-bridge = <&v2m_sysreg>;
 
-		osc@0 {
+		oscclk0: osc@0 {
 			/* CPU and internal AXI reference clock */
 			compatible = "arm,vexpress-osc";
 			arm,vexpress-sysreg,func = <1 0>;

diff --git a/arch/arm/boot/dts/vf610.dtsi b/arch/arm/boot/dts/vf610.dtsi
@@ -371,6 +371,19 @@
 				status = "disabled";
 			};
 
+			ftm: ftm@400b8000 {
+				compatible = "fsl,ftm-timer";
+				reg = <0x400b8000 0x1000 0x400b9000 0x1000>;
+				interrupts = <0 44 IRQ_TYPE_LEVEL_HIGH>;
+				clock-names = "ftm-evt", "ftm-src",
+					"ftm-evt-counter-en", "ftm-src-counter-en";
+				clocks = <&clks VF610_CLK_FTM2>,
+					<&clks VF610_CLK_FTM3>,
+					<&clks VF610_CLK_FTM2_EXT_FIX_EN>,
+					<&clks VF610_CLK_FTM3_EXT_FIX_EN>;
+				status = "disabled";
+			};
+
 			fec0: ethernet@400d0000 {
 				compatible = "fsl,mvf600-fec";
 				reg = <0x400d0000 0x1000>;

diff --git a/arch/arm/mach-vexpress/Kconfig b/arch/arm/mach-vexpress/Kconfig
@@ -4,6 +4,7 @@ config ARCH_VEXPRESS
 	select ARCH_SUPPORTS_BIG_ENDIAN
 	select ARM_AMBA
 	select ARM_GIC
+	select ARM_GLOBAL_TIMER
 	select ARM_TIMER_SP804
 	select COMMON_CLK_VERSATILE
 	select HAVE_ARM_SCU if SMP

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
@@ -136,6 +136,11 @@ config CLKSRC_SAMSUNG_PWM
 	  for all devicetree enabled platforms. This driver will be
 	  needed only on systems that do not have the Exynos MCT available.
 
+config FSL_FTM_TIMER
+	bool
+	help
+	  Support for Freescale FlexTimer Module (FTM) timer.
+
 config VF_PIT_TIMER
 	bool
 	help

diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
@@ -31,6 +31,7 @@ obj-$(CONFIG_CADENCE_TTC_TIMER)	+= cadence_ttc_timer.o
 obj-$(CONFIG_CLKSRC_EFM32)	+= time-efm32.o
 obj-$(CONFIG_CLKSRC_EXYNOS_MCT)	+= exynos_mct.o
 obj-$(CONFIG_CLKSRC_SAMSUNG_PWM)	+= samsung_pwm_timer.o
+obj-$(CONFIG_FSL_FTM_TIMER)	+= fsl_ftm_timer.o
 obj-$(CONFIG_VF_PIT_TIMER)	+= vf_pit_timer.o
 obj-$(CONFIG_CLKSRC_QCOM)	+= qcom-timer.o
 

diff --git a/drivers/clocksource/arm_global_timer.c b/drivers/clocksource/arm_global_timer.c
@@ -246,11 +246,12 @@ static void __init global_timer_of_register(struct device_node *np)
 	int err = 0;
 
 	/*
-	 * In r2p0 the comparators for each processor with the global timer
+	 * In A9 r2p0 the comparators for each processor with the global timer
 	 * fire when the timer value is greater than or equal to. In previous
 	 * revisions the comparators fired when the timer value was equal to.
 	 */
-	if ((read_cpuid_id() & 0xf0000f) < 0x200000) {
+	if (read_cpuid_part_number() == ARM_CPU_PART_CORTEX_A9
+	    && (read_cpuid_id() & 0xf0000f) < 0x200000) {
 		pr_warn("global-timer: non support for this cpu version.\n");
 		return;
 	}

diff --git a/drivers/clocksource/dw_apb_timer_of.c b/drivers/clocksource/dw_apb_timer_of.c
@@ -106,7 +106,7 @@ static void __init add_clocksource(struct device_node *source_timer)
 	sched_rate = rate;
 }
 
-static u64 read_sched_clock(void)
+static u64 notrace read_sched_clock(void)
 {
 	return ~__raw_readl(sched_io_base);
 }

diff --git a/drivers/clocksource/em_sti.c b/drivers/clocksource/em_sti.c
@@ -318,10 +318,8 @@ static int em_sti_probe(struct platform_device *pdev)
 	int irq;
 
 	p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
-	if (p == NULL) {
-		dev_err(&pdev->dev, "failed to allocate driver data\n");
+	if (p == NULL)
 		return -ENOMEM;
-	}
 
 	p->pdev = pdev;
 	platform_set_drvdata(pdev, p);