Commit 8932a953 authored by Anup Patel's avatar Anup Patel Committed by Daniel Lezcano
Browse files

clocksource/drivers/timer-riscv: Set CLOCK_EVT_FEAT_C3STOP based on DT 



We should set CLOCK_EVT_FEAT_C3STOP for a clock_event_device only
when riscv,timer-cannot-wake-cpu DT property is present in the RISC-V
timer DT node.

This way CLOCK_EVT_FEAT_C3STOP feature is set for clock_event_device
based on RISC-V platform capabilities rather than having it set for
all RISC-V platforms.

Signed-off-by: default avatarAnup Patel <apatel@ventanamicro.com>
Reviewed-by: default avatarConor Dooley <conor.dooley@microchip.com>
Acked-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
Link: https://lore.kernel.org/r/20230103141102.772228-4-apatel@ventanamicro.com


Signed-off-by: default avatarDaniel Lezcano <daniel.lezcano@kernel.org>
parent e2bcf2d8

drivers/clocksource/timer-riscv.c

+10 −0
Original line number Diff line number Diff line
@@ -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)
@@ -85,6 +86,8 @@ 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 +142,13 @@ 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) {