Merge tag 'timers-clocksource-2025-03-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

torvalds · torvalds · commit 1e1ba8d23dae · 2025-03-26T13:30:27.000-07:00
Pull clocksource/event updates from Thomas Gleixner:

  - Add support for suspend/resume in the STM32 LP-Timer driver with a
    follow up fix, which uses the proper method to setup the timer as a
    optional wakeup source instead of trying to force it as mandatory
    wakeup source.

  - The usual device tree updates to enable new SoC models in existing
    drivers.

  - Trivial spelling, style and indentation fixes

* tag 'timers-clocksource-2025-03-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  dt-bindings: timer: Add SiFive CLINT2
  clocksource/drivers/stm32-lptimer: Use wakeup capable instead of init wakeup
  clocksource/drivers/exynos_mct: Fixed a spelling error
  clocksource/drivers/stm32-lptimer: Add support for suspend / resume
  dt-bindings: timer: exynos4210-mct: add samsung,exynos2200-mct-peris compatible
  dt-bindings: timer: exynos4210-mct: Add samsung,exynos990-mct compatible
  dt-bindings: timer: Correct indentation and style in DTS example
diff --git a/Documentation/devicetree/bindings/timer/arm,twd-timer.yaml b/Documentation/devicetree/bindings/timer/arm,twd-timer.yaml
@@ -50,7 +50,7 @@ examples:
     #include <dt-bindings/interrupt-controller/arm-gic.h>
 
     timer@2c000600 {
-            compatible = "arm,arm11mp-twd-timer";
-            reg = <0x2c000600 0x20>;
-            interrupts = <GIC_PPI 13 0xf01>;
+        compatible = "arm,arm11mp-twd-timer";
+        reg = <0x2c000600 0x20>;
+        interrupts = <GIC_PPI 13 0xf01>;
     };
diff --git a/Documentation/devicetree/bindings/timer/renesas,cmt.yaml b/Documentation/devicetree/bindings/timer/renesas,cmt.yaml
@@ -178,29 +178,29 @@ examples:
     #include <dt-bindings/interrupt-controller/arm-gic.h>
     #include <dt-bindings/power/r8a7790-sysc.h>
     cmt0: timer@ffca0000 {
-            compatible = "renesas,r8a7790-cmt0", "renesas,rcar-gen2-cmt0";
-            reg = <0xffca0000 0x1004>;
-            interrupts = <GIC_SPI 142 IRQ_TYPE_LEVEL_HIGH>,
-                         <GIC_SPI 143 IRQ_TYPE_LEVEL_HIGH>;
-            clocks = <&cpg CPG_MOD 124>;
-            clock-names = "fck";
-            power-domains = <&sysc R8A7790_PD_ALWAYS_ON>;
-            resets = <&cpg 124>;
+        compatible = "renesas,r8a7790-cmt0", "renesas,rcar-gen2-cmt0";
+        reg = <0xffca0000 0x1004>;
+        interrupts = <GIC_SPI 142 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 143 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&cpg CPG_MOD 124>;
+        clock-names = "fck";
+        power-domains = <&sysc R8A7790_PD_ALWAYS_ON>;
+        resets = <&cpg 124>;
     };
 
     cmt1: timer@e6130000 {
-            compatible = "renesas,r8a7790-cmt1", "renesas,rcar-gen2-cmt1";
-            reg = <0xe6130000 0x1004>;
-            interrupts = <GIC_SPI 120 IRQ_TYPE_LEVEL_HIGH>,
-                         <GIC_SPI 121 IRQ_TYPE_LEVEL_HIGH>,
-                         <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>,
-                         <GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>,
-                         <GIC_SPI 124 IRQ_TYPE_LEVEL_HIGH>,
-                         <GIC_SPI 125 IRQ_TYPE_LEVEL_HIGH>,
-                         <GIC_SPI 126 IRQ_TYPE_LEVEL_HIGH>,
-                         <GIC_SPI 127 IRQ_TYPE_LEVEL_HIGH>;
-            clocks = <&cpg CPG_MOD 329>;
-            clock-names = "fck";
-            power-domains = <&sysc R8A7790_PD_ALWAYS_ON>;
-            resets = <&cpg 329>;
+        compatible = "renesas,r8a7790-cmt1", "renesas,rcar-gen2-cmt1";
+        reg = <0xe6130000 0x1004>;
+        interrupts = <GIC_SPI 120 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 121 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 124 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 125 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 126 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 127 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&cpg CPG_MOD 329>;
+        clock-names = "fck";
+        power-domains = <&sysc R8A7790_PD_ALWAYS_ON>;
+        resets = <&cpg 329>;
     };
diff --git a/Documentation/devicetree/bindings/timer/renesas,em-sti.yaml b/Documentation/devicetree/bindings/timer/renesas,em-sti.yaml
@@ -38,9 +38,9 @@ examples:
   - |
     #include <dt-bindings/interrupt-controller/arm-gic.h>
     timer@e0180000 {
-            compatible = "renesas,em-sti";
-            reg = <0xe0180000 0x54>;
-            interrupts = <GIC_SPI 125 IRQ_TYPE_LEVEL_HIGH>;
-            clocks = <&sti_sclk>;
-            clock-names = "sclk";
+        compatible = "renesas,em-sti";
+        reg = <0xe0180000 0x54>;
+        interrupts = <GIC_SPI 125 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&sti_sclk>;
+        clock-names = "sclk";
     };
diff --git a/Documentation/devicetree/bindings/timer/renesas,mtu2.yaml b/Documentation/devicetree/bindings/timer/renesas,mtu2.yaml
@@ -66,11 +66,11 @@ examples:
     #include <dt-bindings/clock/r7s72100-clock.h>
     #include <dt-bindings/interrupt-controller/arm-gic.h>
     mtu2: timer@fcff0000 {
-            compatible = "renesas,mtu2-r7s72100", "renesas,mtu2";
-            reg = <0xfcff0000 0x400>;
-            interrupts = <GIC_SPI 107 IRQ_TYPE_LEVEL_HIGH>;
-            interrupt-names = "tgi0a";
-            clocks = <&mstp3_clks R7S72100_CLK_MTU2>;
-            clock-names = "fck";
-            power-domains = <&cpg_clocks>;
+        compatible = "renesas,mtu2-r7s72100", "renesas,mtu2";
+        reg = <0xfcff0000 0x400>;
+        interrupts = <GIC_SPI 107 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-names = "tgi0a";
+        clocks = <&mstp3_clks R7S72100_CLK_MTU2>;
+        clock-names = "fck";
+        power-domains = <&cpg_clocks>;
     };
diff --git a/Documentation/devicetree/bindings/timer/renesas,ostm.yaml b/Documentation/devicetree/bindings/timer/renesas,ostm.yaml
@@ -71,9 +71,9 @@ examples:
     #include <dt-bindings/clock/r7s72100-clock.h>
     #include <dt-bindings/interrupt-controller/arm-gic.h>
     ostm0: timer@fcfec000 {
-            compatible = "renesas,r7s72100-ostm", "renesas,ostm";
-            reg = <0xfcfec000 0x30>;
-            interrupts = <GIC_SPI 102 IRQ_TYPE_EDGE_RISING>;
-            clocks = <&mstp5_clks R7S72100_CLK_OSTM0>;
-            power-domains = <&cpg_clocks>;
+        compatible = "renesas,r7s72100-ostm", "renesas,ostm";
+        reg = <0xfcfec000 0x30>;
+        interrupts = <GIC_SPI 102 IRQ_TYPE_EDGE_RISING>;
+        clocks = <&mstp5_clks R7S72100_CLK_OSTM0>;
+        power-domains = <&cpg_clocks>;
     };
diff --git a/Documentation/devicetree/bindings/timer/renesas,tmu.yaml b/Documentation/devicetree/bindings/timer/renesas,tmu.yaml
@@ -122,15 +122,15 @@ examples:
     #include <dt-bindings/interrupt-controller/arm-gic.h>
     #include <dt-bindings/power/r8a7779-sysc.h>
     tmu0: timer@ffd80000 {
-            compatible = "renesas,tmu-r8a7779", "renesas,tmu";
-            reg = <0xffd80000 0x30>;
-            interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>,
-                         <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>,
-                         <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>,
-                         <GIC_SPI 35 IRQ_TYPE_LEVEL_HIGH>;
-            interrupt-names = "tuni0", "tuni1", "tuni2", "ticpi2";
-            clocks = <&mstp0_clks R8A7779_CLK_TMU0>;
-            clock-names = "fck";
-            power-domains = <&sysc R8A7779_PD_ALWAYS_ON>;
-            #renesas,channels = <3>;
+        compatible = "renesas,tmu-r8a7779", "renesas,tmu";
+        reg = <0xffd80000 0x30>;
+        interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 35 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-names = "tuni0", "tuni1", "tuni2", "ticpi2";
+        clocks = <&mstp0_clks R8A7779_CLK_TMU0>;
+        clock-names = "fck";
+        power-domains = <&sysc R8A7779_PD_ALWAYS_ON>;
+        #renesas,channels = <3>;
     };
diff --git a/Documentation/devicetree/bindings/timer/renesas,tpu.yaml b/Documentation/devicetree/bindings/timer/renesas,tpu.yaml
@@ -49,8 +49,8 @@ additionalProperties: false
 examples:
   - |
     tpu: tpu@ffffe0 {
-            compatible = "renesas,tpu";
-            reg = <0xffffe0 16>, <0xfffff0 12>;
-            clocks = <&pclk>;
-            clock-names = "fck";
+        compatible = "renesas,tpu";
+        reg = <0xffffe0 16>, <0xfffff0 12>;
+        clocks = <&pclk>;
+        clock-names = "fck";
     };
diff --git a/Documentation/devicetree/bindings/timer/samsung,exynos4210-mct.yaml b/Documentation/devicetree/bindings/timer/samsung,exynos4210-mct.yaml
@@ -27,13 +27,15 @@ properties:
           - enum:
               - axis,artpec8-mct
               - google,gs101-mct
+              - samsung,exynos2200-mct-peris
               - samsung,exynos3250-mct
               - samsung,exynos5250-mct
               - samsung,exynos5260-mct
               - samsung,exynos5420-mct
               - samsung,exynos5433-mct
               - samsung,exynos850-mct
               - samsung,exynos8895-mct
+              - samsung,exynos990-mct
               - tesla,fsd-mct
           - const: samsung,exynos4210-mct
 
@@ -130,11 +132,13 @@ allOf:
             enum:
               - axis,artpec8-mct
               - google,gs101-mct
+              - samsung,exynos2200-mct-peris
               - samsung,exynos5260-mct
               - samsung,exynos5420-mct
               - samsung,exynos5433-mct
               - samsung,exynos850-mct
               - samsung,exynos8895-mct
+              - samsung,exynos990-mct
     then:
       properties:
         interrupts:
diff --git a/Documentation/devicetree/bindings/timer/sifive,clint.yaml b/Documentation/devicetree/bindings/timer/sifive,clint.yaml
@@ -36,6 +36,12 @@ properties:
               - starfive,jh7110-clint   # StarFive JH7110
               - starfive,jh8100-clint   # StarFive JH8100
           - const: sifive,clint0        # SiFive CLINT v0 IP block
+      - items:
+          - {}
+          - const: sifive,clint2        # SiFive CLINT v2 IP block
+        description:
+          SiFive CLINT v2 is the HRT that supports the Zicntr. The control of sifive,clint2
+          differs from that of sifive,clint0, making them incompatible.
       - items:
           - enum:
               - allwinner,sun20i-d1-clint
@@ -62,6 +68,22 @@ properties:
     minItems: 1
     maxItems: 4095
 
+  sifive,fine-ctr-bits:
+    maximum: 15
+    description: The width in bits of the fine counter.
+
+if:
+  properties:
+    compatible:
+      contains:
+        const: sifive,clint2
+then:
+  required:
+    - sifive,fine-ctr-bits
+else:
+  properties:
+    sifive,fine-ctr-bits: false
+
 additionalProperties: false
 
 required:
@@ -77,6 +99,6 @@ examples:
                             <&cpu2intc 3>, <&cpu2intc 7>,
                             <&cpu3intc 3>, <&cpu3intc 7>,
                             <&cpu4intc 3>, <&cpu4intc 7>;
-       reg = <0x2000000 0x10000>;
+      reg = <0x2000000 0x10000>;
     };
 ...
diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c
@@ -238,7 +238,7 @@ static cycles_t exynos4_read_current_timer(void)
 static int __init exynos4_clocksource_init(bool frc_shared)
 {
 	/*
-	 * When the frc is shared, the main processer should have already
+	 * When the frc is shared, the main processor should have already
 	 * turned it on and we shouldn't be writing to TCON.
 	 */
 	if (frc_shared)
diff --git a/drivers/clocksource/timer-stm32-lp.c b/drivers/clocksource/timer-stm32-lp.c
@@ -24,7 +24,9 @@ struct stm32_lp_private {
 	struct regmap *reg;
 	struct clock_event_device clkevt;
 	unsigned long period;
+	u32 psc;
 	struct device *dev;
+	struct clk *clk;
 };
 
 static struct stm32_lp_private*
@@ -120,6 +122,27 @@ static void stm32_clkevent_lp_set_prescaler(struct stm32_lp_private *priv,
 	/* Adjust rate and period given the prescaler value */
 	*rate = DIV_ROUND_CLOSEST(*rate, (1 << i));
 	priv->period = DIV_ROUND_UP(*rate, HZ);
+	priv->psc = i;
+}
+
+static void stm32_clkevent_lp_suspend(struct clock_event_device *clkevt)
+{
+	struct stm32_lp_private *priv = to_priv(clkevt);
+
+	stm32_clkevent_lp_shutdown(clkevt);
+
+	/* balance clk_prepare_enable() from the probe */
+	clk_disable_unprepare(priv->clk);
+}
+
+static void stm32_clkevent_lp_resume(struct clock_event_device *clkevt)
+{
+	struct stm32_lp_private *priv = to_priv(clkevt);
+
+	clk_prepare_enable(priv->clk);
+
+	/* restore prescaler */
+	regmap_write(priv->reg, STM32_LPTIM_CFGR, priv->psc << CFGR_PSC_OFFSET);
 }
 
 static void stm32_clkevent_lp_init(struct stm32_lp_private *priv,
@@ -134,6 +157,8 @@ static void stm32_clkevent_lp_init(struct stm32_lp_private *priv,
 	priv->clkevt.set_state_oneshot = stm32_clkevent_lp_set_oneshot;
 	priv->clkevt.set_next_event = stm32_clkevent_lp_set_next_event;
 	priv->clkevt.rating = STM32_LP_RATING;
+	priv->clkevt.suspend = stm32_clkevent_lp_suspend;
+	priv->clkevt.resume = stm32_clkevent_lp_resume;
 
 	clockevents_config_and_register(&priv->clkevt, rate, 0x1,
 					STM32_LPTIM_MAX_ARR);
@@ -151,11 +176,12 @@ static int stm32_clkevent_lp_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	priv->reg = ddata->regmap;
-	ret = clk_prepare_enable(ddata->clk);
+	priv->clk = ddata->clk;
+	ret = clk_prepare_enable(priv->clk);
 	if (ret)
 		return -EINVAL;
 
-	rate = clk_get_rate(ddata->clk);
+	rate = clk_get_rate(priv->clk);
 	if (!rate) {
 		ret = -EINVAL;
 		goto out_clk_disable;
@@ -168,9 +194,7 @@ static int stm32_clkevent_lp_probe(struct platform_device *pdev)
 	}
 
 	if (of_property_read_bool(pdev->dev.parent->of_node, "wakeup-source")) {
-		ret = device_init_wakeup(&pdev->dev, true);
-		if (ret)
-			goto out_clk_disable;
+		device_set_wakeup_capable(&pdev->dev, true);
 
 		ret = dev_pm_set_wake_irq(&pdev->dev, irq);
 		if (ret)
@@ -191,7 +215,7 @@ static int stm32_clkevent_lp_probe(struct platform_device *pdev)
 	return 0;
 
 out_clk_disable:
-	clk_disable_unprepare(ddata->clk);
+	clk_disable_unprepare(priv->clk);
 	return ret;
 }
 

Original file line number	Diff line number	Diff line change
`@@ -238,7 +238,7 @@ static cycles_t exynos4_read_current_timer(void)`
`238`	`238`	`static int __init exynos4_clocksource_init(bool frc_shared)`
`239`	`239`	`{`
`240`	`240`	`/*`
`241`		`- * When the frc is shared, the main processer should have already`
	`241`	`+ * When the frc is shared, the main processor should have already`
`242`	`242`	`* turned it on and we shouldn't be writing to TCON.`
`243`	`243`	`*/`
`244`	`244`	`if (frc_shared)`