Merge tag 'timers-v6.3-rc1' of https://git.linaro.org/people/daniel.lezcano/linux into timers/core

Pull clocksource/event changes from Daniel Lezcano:

   - Add rktimer for rv1126 Rockchip based board (Jagan Teki)

   - Initialize hrtimer based broadcast clock event device on RISC-V
     before C3STOP can be used (Conor Dooley)

   - Add DT binding for RISC-V timer and add the C3STOP flag if the DT
     tells the timer can not wake up the CPU (Anup Patel)

   - Increase the RISC-V timer rating as it is more efficient than mmio
     timers (Samuel Holland)

   - Drop obsolete dependency on COMPILE_TEST on microchip-pit64b as the
     OF is already depending on it (Jean Delvare)

   - Mark sh_cmt, sh_tmu, em_sti drivers as non-removable (Uwe
     Kleine-König)

   - Add binding description for mediatek,mt8365-systimer (Bernhard
     Rosenkränzer)

   - Add compatibles for T-Head's C9xx (Icenowy Zheng)

   - Restrict the microchip-pit64b compilation to the ARM architecture
     and add the delay timer (Claudiu Beznea)

   - Set the static key to select the SBI or Sstc timer sooner to prevent
     the first call to use the SBI while Sstc must be used (Matt Evans)

   - Add the CLOCK_EVT_FEAT_DYNIRQ flag to optimize the timer wake up on
     the sun4i platform (Yangtao Li)

Link: https://lore.kernel/org/r/b7d1d982-d717-2930-b353-19b92cbe390f@linaro.org

7 files changed, 39 insertions, 26 deletions

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 4469e7f555e9..ac22c1af056b 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -706,7 +706,7 @@ config INGENIC_OST
 
 config MICROCHIP_PIT64B
 	bool "Microchip PIT64B support"
-	depends on OF || COMPILE_TEST
+	depends on OF && ARM
 	select TIMER_OF
 	help
 	  This option enables Microchip PIT64B timer for Atmel
diff --git a/drivers/clocksource/em_sti.c b/drivers/clocksource/em_sti.c
index ab190dffb1ed..c04b47bd4868 100644
--- a/drivers/clocksource/em_sti.c
+++ b/drivers/clocksource/em_sti.c
@@ -333,11 +333,6 @@ static int em_sti_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int em_sti_remove(struct platform_device *pdev)
-{
-	return -EBUSY; /* cannot unregister clockevent and clocksource */
-}
-
 static const struct of_device_id em_sti_dt_ids[] = {
 	{ .compatible = "renesas,em-sti", },
 	{},
@@ -346,10 +341,10 @@ MODULE_DEVICE_TABLE(of, em_sti_dt_ids);
 
 static struct platform_driver em_sti_device_driver = {
 	.probe		= em_sti_probe,
-	.remove		= em_sti_remove,
 	.driver		= {
 		.name	= "em_sti",
 		.of_match_table = em_sti_dt_ids,
+		.suppress_bind_attrs = true,
 	}
 };
 
diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c
index 7b952aa52c0b..8b2e079d9df2 100644
--- a/drivers/clocksource/sh_cmt.c
+++ b/drivers/clocksource/sh_cmt.c
@@ -1145,17 +1145,12 @@ static int sh_cmt_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int sh_cmt_remove(struct platform_device *pdev)
-{
-	return -EBUSY; /* cannot unregister clockevent and clocksource */
-}
-
 static struct platform_driver sh_cmt_device_driver = {
 	.probe		= sh_cmt_probe,
-	.remove		= sh_cmt_remove,
 	.driver		= {
 		.name	= "sh_cmt",
 		.of_match_table = of_match_ptr(sh_cmt_of_table),
+		.suppress_bind_attrs = true,
 	},
 	.id_table	= sh_cmt_id_table,
 };
diff --git a/drivers/clocksource/sh_tmu.c b/drivers/clocksource/sh_tmu.c
index b00dec0655cb..932f31a7c5be 100644
--- a/drivers/clocksource/sh_tmu.c
+++ b/drivers/clocksource/sh_tmu.c
@@ -632,11 +632,6 @@ static int sh_tmu_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int sh_tmu_remove(struct platform_device *pdev)
-{
-	return -EBUSY; /* cannot unregister clockevent and clocksource */
-}
-
 static const struct platform_device_id sh_tmu_id_table[] = {
 	{ "sh-tmu", SH_TMU },
 	{ "sh-tmu-sh3", SH_TMU_SH3 },
@@ -652,10 +647,10 @@ MODULE_DEVICE_TABLE(of, sh_tmu_of_table);
 
 static struct platform_driver sh_tmu_device_driver = {
 	.probe		= sh_tmu_probe,
-	.remove		= sh_tmu_remove,
 	.driver		= {
 		.name	= "sh_tmu",
 		.of_match_table = of_match_ptr(sh_tmu_of_table),
+		.suppress_bind_attrs = true,
 	},
 	.id_table	= sh_tmu_id_table,
 };
diff --git a/drivers/clocksource/timer-microchip-pit64b.c b/drivers/clocksource/timer-microchip-pit64b.c
index d5f1436f33d9..57209bb38c70 100644
--- a/drivers/clocksource/timer-microchip-pit64b.c
+++ b/drivers/clocksource/timer-microchip-pit64b.c
@@ -9,6 +9,7 @@
 
 #include <linux/clk.h>
 #include <linux/clockchips.h>
+#include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
@@ -92,6 +93,8 @@ struct mchp_pit64b_clksrc {
 static void __iomem *mchp_pit64b_cs_base;
 /* Default cycles for clockevent timer. */
 static u64 mchp_pit64b_ce_cycles;
+/* Delay timer. */
+static struct delay_timer mchp_pit64b_dt;
 
 static inline u64 mchp_pit64b_cnt_read(void __iomem *base)
 {
@@ -169,6 +172,11 @@ static u64 notrace mchp_pit64b_sched_read_clk(void)
 	return mchp_pit64b_cnt_read(mchp_pit64b_cs_base);
 }
 
+static unsigned long notrace mchp_pit64b_dt_read(void)
+{
+	return mchp_pit64b_cnt_read(mchp_pit64b_cs_base);
+}
+
 static int mchp_pit64b_clkevt_shutdown(struct clock_event_device *cedev)
 {
 	struct mchp_pit64b_timer *timer = clkevt_to_mchp_pit64b_timer(cedev);
@@ -376,6 +384,10 @@ static int __init mchp_pit64b_init_clksrc(struct mchp_pit64b_timer *timer,
 
 	sched_clock_register(mchp_pit64b_sched_read_clk, 64, clk_rate);
 
+	mchp_pit64b_dt.read_current_timer = mchp_pit64b_dt_read;
+	mchp_pit64b_dt.freq = clk_rate;
+	register_current_timer_delay(&mchp_pit64b_dt);
+
 	return 0;
 }
 
diff --git a/drivers/clocksource/timer-riscv.c b/drivers/clocksource/timer-riscv.c
index a0d66fabf073..5f0f10c7e222 100644
--- a/drivers/clocksource/timer-riscv.c
+++ b/drivers/clocksource/timer-riscv.c
@@ -28,6 +28,7 @@
 #include <asm/timex.h>
 
 static DEFINE_STATIC_KEY_FALSE(riscv_sstc_available);
+static bool riscv_timer_cannot_wake_cpu;
 
 static int riscv_clock_next_event(unsigned long delta,
 		struct clock_event_device *ce)
@@ -73,10 +74,15 @@ static u64 notrace riscv_sched_clock(void)
 
 static struct clocksource riscv_clocksource = {
 	.name		= "riscv_clocksource",
-	.rating		= 300,
+	.rating		= 400,
 	.mask		= CLOCKSOURCE_MASK(64),
 	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
 	.read		= riscv_clocksource_rdtime,
+#if IS_ENABLED(CONFIG_GENERIC_GETTIMEOFDAY)
+	.vdso_clock_mode = VDSO_CLOCKMODE_ARCHTIMER,
+#else
+	.vdso_clock_mode = VDSO_CLOCKMODE_NONE,
+#endif
 };
 
 static int riscv_timer_starting_cpu(unsigned int cpu)
@@ -85,6 +91,8 @@ static int riscv_timer_starting_cpu(unsigned int cpu)
 
 	ce->cpumask = cpumask_of(cpu);
 	ce->irq = riscv_clock_event_irq;
+	if (riscv_timer_cannot_wake_cpu)
+		ce->features |= CLOCK_EVT_FEAT_C3STOP;
 	clockevents_config_and_register(ce, riscv_timebase, 100, 0x7fffffff);
 
 	enable_percpu_irq(riscv_clock_event_irq,
@@ -139,6 +147,13 @@ static int __init riscv_timer_init_dt(struct device_node *n)
 	if (cpuid != smp_processor_id())
 		return 0;
 
+	child = of_find_compatible_node(NULL, NULL, "riscv,timer");
+	if (child) {
+		riscv_timer_cannot_wake_cpu = of_property_read_bool(child,
+					"riscv,timer-cannot-wake-cpu");
+		of_node_put(child);
+	}
+
 	domain = NULL;
 	child = of_get_compatible_child(n, "riscv,cpu-intc");
 	if (!child) {
@@ -177,6 +192,11 @@ static int __init riscv_timer_init_dt(struct device_node *n)
 		return error;
 	}
 
+	if (riscv_isa_extension_available(NULL, SSTC)) {
+		pr_info("Timer interrupt in S-mode is available via sstc extension\n");
+		static_branch_enable(&riscv_sstc_available);
+	}
+
 	error = cpuhp_setup_state(CPUHP_AP_RISCV_TIMER_STARTING,
 			 "clockevents/riscv/timer:starting",
 			 riscv_timer_starting_cpu, riscv_timer_dying_cpu);
@@ -184,11 +204,6 @@ static int __init riscv_timer_init_dt(struct device_node *n)
 		pr_err("cpu hp setup state failed for RISCV timer [%d]\n",
 		       error);
 
-	if (riscv_isa_extension_available(NULL, SSTC)) {
-		pr_info("Timer interrupt in S-mode is available via sstc extension\n");
-		static_branch_enable(&riscv_sstc_available);
-	}
-
 	return error;
 }
 
diff --git a/drivers/clocksource/timer-sun4i.c b/drivers/clocksource/timer-sun4i.c
index e5a70aa1deb4..7bdcc60ad43c 100644
--- a/drivers/clocksource/timer-sun4i.c
+++ b/drivers/clocksource/timer-sun4i.c
@@ -144,7 +144,8 @@ static struct timer_of to = {
 	.clkevt = {
 		.name = "sun4i_tick",
 		.rating = 350,
-		.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
+		.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT |
+				CLOCK_EVT_FEAT_DYNIRQ,
 		.set_state_shutdown = sun4i_clkevt_shutdown,
 		.set_state_periodic = sun4i_clkevt_set_periodic,
 		.set_state_oneshot = sun4i_clkevt_set_oneshot,