Merge tag 'timers-v6.13-rc1' of https://git.linaro.org/people/daniel.lezcano/linux into timers/core

KAGA-KOKO · KAGA-KOKO · commit 228ad72e7660 · 2024-11-13T21:09:35.000+01:00
Pull clocksource/event updates from Daniel Lezcano: - Remove unused dw_apb_clockevent_[pause|resume|stop] functions as they are unused since 2021 (David Alan Gilbert) - Make the sp804 driver user selectable as they may be unused on some platforms (Mark Brown) - Don't fail if the ti-dm does not describe an interrupt in the DT as this could be a normal situation if the PWM is used (Judith Mendez) - Always use cluster 0 counter as a clocksource on a multi-cluster system to prevent problems related to the time shifting between clusters if multiple per cluster clocksource is used (Paul Burton) - Move the RaLink system tick counter from the arch directory to the clocksource directory (Sergio Paracuellos) - Convert the owl-timer bindings into yaml schema (Ivaylo Ivanov) - Fix child node refcount handling on the TI DM by relying on the __free annotation to automatically release the refcount on the node (Javier Carrasco) - Remove pointless cast in the GPX driver as PTR_ERR already does that (Tang Bin) - Use of_property_present() for non-boolean properties where it is possible in the different drivers (Rob Herring) Link: https://lore.kernel.org/lkml/8d402321-96f1-47f7-9347-a850350d60de@linaro.org
diff --git a/Documentation/devicetree/bindings/timer/actions,owl-timer.txt b/Documentation/devicetree/bindings/timer/actions,owl-timer.txt
diff --git a/Documentation/devicetree/bindings/timer/actions,owl-timer.yaml b/Documentation/devicetree/bindings/timer/actions,owl-timer.yaml
@@ -0,0 +1,107 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/timer/actions,owl-timer.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Actions Semi Owl timer
+
+maintainers:
+  - Andreas Färber <afaerber@suse.de>
+
+description:
+  Actions Semi Owl SoCs provide 32bit and 2Hz timers.
+  The 32bit timers support dynamic irq, as well as one-shot mode.
+
+properties:
+  compatible:
+    enum:
+      - actions,s500-timer
+      - actions,s700-timer
+      - actions,s900-timer
+
+  clocks:
+    maxItems: 1
+
+  interrupts:
+    minItems: 1
+    maxItems: 6
+
+  interrupt-names:
+    minItems: 1
+    maxItems: 6
+    items:
+      enum:
+        - 2hz0
+        - 2hz1
+        - timer0
+        - timer1
+        - timer2
+        - timer3
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - clocks
+  - interrupts
+  - interrupt-names
+  - reg
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - actions,s500-timer
+    then:
+      properties:
+        interrupts:
+          minItems: 4
+          maxItems: 4
+        interrupt-names:
+          items:
+            - const: 2hz0
+            - const: 2hz1
+            - const: timer0
+            - const: timer1
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - actions,s700-timer
+              - actions,s900-timer
+    then:
+      properties:
+        interrupts:
+          minItems: 1
+          maxItems: 1
+        interrupt-names:
+          items:
+            - const: timer1
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    soc {
+      #address-cells = <1>;
+      #size-cells = <1>;
+      timer@b0168000 {
+        compatible = "actions,s500-timer";
+        reg = <0xb0168000 0x100>;
+        clocks = <&hosc>;
+        interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-names = "2hz0", "2hz1", "timer0", "timer1";
+      };
+    };
+...
diff --git a/MAINTAINERS b/MAINTAINERS
@@ -2004,7 +2004,7 @@ F:	Documentation/devicetree/bindings/mmc/owl-mmc.yaml
 F:	Documentation/devicetree/bindings/net/actions,owl-emac.yaml
 F:	Documentation/devicetree/bindings/pinctrl/actions,*
 F:	Documentation/devicetree/bindings/power/actions,owl-sps.txt
-F:	Documentation/devicetree/bindings/timer/actions,owl-timer.txt
+F:	Documentation/devicetree/bindings/timer/actions,owl-timer.yaml
 F:	arch/arm/boot/dts/actions/
 F:	arch/arm/mach-actions/
 F:	arch/arm64/boot/dts/actions/
diff --git a/arch/mips/ralink/Kconfig b/arch/mips/ralink/Kconfig
@@ -1,13 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 if RALINK
 
-config CLKEVT_RT3352
-	bool
-	depends on SOC_RT305X || SOC_MT7620
-	default y
-	select TIMER_OF
-	select CLKSRC_MMIO
-
 config RALINK_ILL_ACC
 	bool
 	depends on SOC_RT305X
diff --git a/arch/mips/ralink/Makefile b/arch/mips/ralink/Makefile
@@ -10,8 +10,6 @@ ifndef CONFIG_MIPS_GIC
 	obj-y += clk.o timer.o
 endif
 
-obj-$(CONFIG_CLKEVT_RT3352) += cevt-rt3352.o
-
 obj-$(CONFIG_RALINK_ILL_ACC) += ill_acc.o
 
 obj-$(CONFIG_IRQ_INTC) += irq.o
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
@@ -400,7 +400,8 @@ config ARM_GT_INITIAL_PRESCALER_VAL
 	  This affects CPU_FREQ max delta from the initial frequency.
 
 config ARM_TIMER_SP804
-	bool "Support for Dual Timer SP804 module" if COMPILE_TEST
+	bool "Support for Dual Timer SP804 module"
+	depends on ARM || ARM64 || COMPILE_TEST
 	depends on GENERIC_SCHED_CLOCK && HAVE_CLK
 	select CLKSRC_MMIO
 	select TIMER_OF if OF
@@ -753,4 +754,13 @@ config EP93XX_TIMER
 	  Enables support for the Cirrus Logic timer block
 	  EP93XX.
 
+config RALINK_TIMER
+	bool "Ralink System Tick Counter"
+	depends on SOC_RT305X || SOC_MT7620 || COMPILE_TEST
+	select CLKSRC_MMIO
+	select TIMER_OF
+	help
+	  Enables support for system tick counter present on
+	  Ralink SoCs RT3352 and MT7620.
+
 endmenu
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
@@ -91,3 +91,4 @@ obj-$(CONFIG_GOLDFISH_TIMER)		+= timer-goldfish.o
 obj-$(CONFIG_GXP_TIMER)			+= timer-gxp.o
 obj-$(CONFIG_CLKSRC_LOONGSON1_PWM)	+= timer-loongson1-pwm.o
 obj-$(CONFIG_EP93XX_TIMER)		+= timer-ep93xx.o
+obj-$(CONFIG_RALINK_TIMER)		+= timer-ralink.o
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
@@ -1428,7 +1428,7 @@ static int __init arch_timer_of_init(struct device_node *np)
 
 	arch_timers_present |= ARCH_TIMER_TYPE_CP15;
 
-	has_names = of_property_read_bool(np, "interrupt-names");
+	has_names = of_property_present(np, "interrupt-names");
 
 	for (i = ARCH_TIMER_PHYS_SECURE_PPI; i < ARCH_TIMER_MAX_TIMER_PPI; i++) {
 		if (has_names)
diff --git a/drivers/clocksource/dw_apb_timer.c b/drivers/clocksource/dw_apb_timer.c
@@ -68,25 +68,6 @@ static inline void apbt_writel_relaxed(struct dw_apb_timer *timer, u32 val,
 	writel_relaxed(val, timer->base + offs);
 }
 
-static void apbt_disable_int(struct dw_apb_timer *timer)
-{
-	u32 ctrl = apbt_readl(timer, APBTMR_N_CONTROL);
-
-	ctrl |= APBTMR_CONTROL_INT;
-	apbt_writel(timer, ctrl, APBTMR_N_CONTROL);
-}
-
-/**
- * dw_apb_clockevent_pause() - stop the clock_event_device from running
- *
- * @dw_ced:	The APB clock to stop generating events.
- */
-void dw_apb_clockevent_pause(struct dw_apb_clock_event_device *dw_ced)
-{
-	disable_irq(dw_ced->timer.irq);
-	apbt_disable_int(&dw_ced->timer);
-}
-
 static void apbt_eoi(struct dw_apb_timer *timer)
 {
 	apbt_readl_relaxed(timer, APBTMR_N_EOI);
@@ -284,26 +265,6 @@ dw_apb_clockevent_init(int cpu, const char *name, unsigned rating,
 	return dw_ced;
 }
 
-/**
- * dw_apb_clockevent_resume() - resume a clock that has been paused.
- *
- * @dw_ced:	The APB clock to resume.
- */
-void dw_apb_clockevent_resume(struct dw_apb_clock_event_device *dw_ced)
-{
-	enable_irq(dw_ced->timer.irq);
-}
-
-/**
- * dw_apb_clockevent_stop() - stop the clock_event_device and release the IRQ.
- *
- * @dw_ced:	The APB clock to stop generating the events.
- */
-void dw_apb_clockevent_stop(struct dw_apb_clock_event_device *dw_ced)
-{
-	free_irq(dw_ced->timer.irq, &dw_ced->ced);
-}
-
 /**
  * dw_apb_clockevent_register() - register the clock with the generic layer
  *
diff --git a/drivers/clocksource/mips-gic-timer.c b/drivers/clocksource/mips-gic-timer.c
@@ -166,6 +166,37 @@ static u64 gic_hpt_read(struct clocksource *cs)
 	return gic_read_count();
 }
 
+static u64 gic_hpt_read_multicluster(struct clocksource *cs)
+{
+	unsigned int hi, hi2, lo;
+	u64 count;
+
+	mips_cm_lock_other(0, 0, 0, CM_GCR_Cx_OTHER_BLOCK_GLOBAL);
+
+	if (mips_cm_is64) {
+		count = read_gic_redir_counter();
+		goto out;
+	}
+
+	hi = read_gic_redir_counter_32h();
+	while (true) {
+		lo = read_gic_redir_counter_32l();
+
+		/* If hi didn't change then lo didn't wrap & we're done */
+		hi2 = read_gic_redir_counter_32h();
+		if (hi2 == hi)
+			break;
+
+		/* Otherwise, repeat with the latest hi value */
+		hi = hi2;
+	}
+
+	count = (((u64)hi) << 32) + lo;
+out:
+	mips_cm_unlock_other();
+	return count;
+}
+
 static struct clocksource gic_clocksource = {
 	.name			= "GIC",
 	.read			= gic_hpt_read,
@@ -203,6 +234,11 @@ static int __init __gic_clocksource_init(void)
 		gic_clocksource.rating = 200;
 	gic_clocksource.rating += clamp(gic_frequency / 10000000, 0, 99);
 
+	if (mips_cps_multicluster_cpus()) {
+		gic_clocksource.read = &gic_hpt_read_multicluster;
+		gic_clocksource.vdso_clock_mode = VDSO_CLOCKMODE_NONE;
+	}
+
 	ret = clocksource_register_hz(&gic_clocksource, gic_frequency);
 	if (ret < 0)
 		pr_warn("Unable to register clocksource\n");
@@ -261,7 +297,8 @@ static int __init gic_clocksource_of_init(struct device_node *node)
 	 * stable CPU frequency or on the platforms with CM3 and CPU frequency
 	 * change performed by the CPC core clocks divider.
 	 */
-	if (mips_cm_revision() >= CM_REV_CM3 || !IS_ENABLED(CONFIG_CPU_FREQ)) {
+	if ((mips_cm_revision() >= CM_REV_CM3 || !IS_ENABLED(CONFIG_CPU_FREQ)) &&
+	     !mips_cps_multicluster_cpus()) {
 		sched_clock_register(mips_cm_is64 ?
 				     gic_read_count_64 : gic_read_count_2x32,
 				     gic_count_width, gic_frequency);
diff --git a/drivers/clocksource/timer-gxp.c b/drivers/clocksource/timer-gxp.c
@@ -85,7 +85,7 @@ static int __init gxp_timer_init(struct device_node *node)
 
 	clk = of_clk_get(node, 0);
 	if (IS_ERR(clk)) {
-		ret = (int)PTR_ERR(clk);
+		ret = PTR_ERR(clk);
 		pr_err("%pOFn clock not found: %d\n", node, ret);
 		goto err_free;
 	}
diff --git a/drivers/clocksource/timer-ralink.c b/drivers/clocksource/timer-ralink.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
+ * Ralink System Tick Counter driver present on RT3352 and MT7620 SoCs.
  *
  * Copyright (C) 2013 by John Crispin <john@phrozen.org>
  */
@@ -16,8 +15,6 @@
 #include <linux/of_irq.h>
 #include <linux/of_address.h>
 
-#include <asm/mach-ralink/ralink_regs.h>
-
 #define SYSTICK_FREQ		(50 * 1000)
 
 #define SYSTICK_CONFIG		0x00
@@ -40,7 +37,7 @@ static int systick_set_oneshot(struct clock_event_device *evt);
 static int systick_shutdown(struct clock_event_device *evt);
 
 static int systick_next_event(unsigned long delta,
-				struct clock_event_device *evt)
+			      struct clock_event_device *evt)
 {
 	struct systick_device *sdev;
 	u32 count;
@@ -60,7 +57,7 @@ static void systick_event_handler(struct clock_event_device *dev)
 
 static irqreturn_t systick_interrupt(int irq, void *dev_id)
 {
-	struct clock_event_device *dev = (struct clock_event_device *) dev_id;
+	struct clock_event_device *dev = (struct clock_event_device *)dev_id;
 
 	dev->event_handler(dev);
 
diff --git a/drivers/clocksource/timer-ti-dm-systimer.c b/drivers/clocksource/timer-ti-dm-systimer.c
@@ -202,10 +202,10 @@ static bool __init dmtimer_is_preferred(struct device_node *np)
 
 	/* Secure gptimer12 is always clocked with a fixed source */
 	if (!of_property_read_bool(np, "ti,timer-secure")) {
-		if (!of_property_read_bool(np, "assigned-clocks"))
+		if (!of_property_present(np, "assigned-clocks"))
 			return false;
 
-		if (!of_property_read_bool(np, "assigned-clock-parents"))
+		if (!of_property_present(np, "assigned-clock-parents"))
 			return false;
 	}
 
@@ -686,9 +686,9 @@ subsys_initcall(dmtimer_percpu_timer_startup);
 
 static int __init dmtimer_percpu_quirk_init(struct device_node *np, u32 pa)
 {
-	struct device_node *arm_timer;
+	struct device_node *arm_timer __free(device_node) =
+		of_find_compatible_node(NULL, NULL, "arm,armv7-timer");
 
-	arm_timer = of_find_compatible_node(NULL, NULL, "arm,armv7-timer");
 	if (of_device_is_available(arm_timer)) {
 		pr_warn_once("ARM architected timer wrap issue i940 detected\n");
 		return 0;
diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
@@ -1104,8 +1104,12 @@ static int omap_dm_timer_probe(struct platform_device *pdev)
 		return  -ENOMEM;
 
 	timer->irq = platform_get_irq(pdev, 0);
-	if (timer->irq < 0)
-		return timer->irq;
+	if (timer->irq < 0) {
+		if (of_property_read_bool(dev->of_node, "ti,timer-pwm"))
+			dev_info(dev, "Did not find timer interrupt, timer usable in PWM mode only\n");
+		else
+			return timer->irq;
+	}
 
 	timer->io_base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(timer->io_base))
diff --git a/include/linux/dw_apb_timer.h b/include/linux/dw_apb_timer.h
