[PATCH V6 18/21] clocksource/timer-riscv: Add ACPI support
Sunil V L
sunilvl at ventanamicro.com
Sun May 14 22:49:25 PDT 2023
Initialize the timer driver based on RHCT table on ACPI based
platforms.
Currently, ACPI doesn't support a flag to indicate that the
timer interrupt can wake up the cpu irrespective of its
power state. It will be added in future update.
Signed-off-by: Sunil V L <sunilvl at ventanamicro.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki at intel.com>
Reviewed-by: Andrew Jones <ajones at ventanamicro.com>
Reviewed-by: Conor Dooley <conor.dooley at microchip.com>
---
drivers/clocksource/timer-riscv.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/clocksource/timer-riscv.c b/drivers/clocksource/timer-riscv.c
index cecc4662293b..da3071b387eb 100644
--- a/drivers/clocksource/timer-riscv.c
+++ b/drivers/clocksource/timer-riscv.c
@@ -10,6 +10,7 @@
#define pr_fmt(fmt) "riscv-timer: " fmt
+#include <linux/acpi.h>
#include <linux/clocksource.h>
#include <linux/clockchips.h>
#include <linux/cpu.h>
@@ -207,3 +208,13 @@ static int __init riscv_timer_init_dt(struct device_node *n)
}
TIMER_OF_DECLARE(riscv_timer, "riscv", riscv_timer_init_dt);
+
+#ifdef CONFIG_ACPI
+static int __init riscv_timer_acpi_init(struct acpi_table_header *table)
+{
+ return riscv_timer_init_common();
+}
+
+TIMER_ACPI_DECLARE(aclint_mtimer, ACPI_SIG_RHCT, riscv_timer_acpi_init);
+
+#endif
--
2.34.1
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