Re: [PATCH 16/24] RISC-V: ACPI: clocksource/timer-riscv: Add ACPI support

Conor Dooley
2023-02-09T20:58:46Z

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On Mon, Jan 30, 2023 at 11:52:17PM +0530, Sunil V L wrote:
> timer-riscv driver needs to get the timebase-frequency from
> RISC-V Hart Capabilities Table (RHCT) on ACPI platforms. Add
> support to read the information from RHCT.
>
> Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
> ---
> drivers/clocksource/timer-riscv.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/drivers/clocksource/timer-riscv.c b/drivers/clocksource/timer-riscv.c
> index 4016c065a01c..8079666753a6 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>
> @@ -198,3 +199,11 @@ 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();

I feel like I need to ask as it was deleted in the previous patch, how
does ACPI determine whether the arch timer can wake the CPUs?

Cheers,
Conor.

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