linux-kernel - Re: [PATCH v2 -next 4/4] clocksource/timer-riscv: ACPI: Add timer_cannot_wakeup

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Message-ID: <20231004-4fb4dad9268b0c933550a21e@orel>
Date:   Wed, 4 Oct 2023 10:38:22 +0200
From:   Andrew Jones <ajones@...tanamicro.com>
To:     Sunil V L <sunilvl@...tanamicro.com>
Cc:     linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-acpi@...r.kernel.org,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Conor Dooley <conor.dooley@...rochip.com>,
        Anup Patel <apatel@...tanamicro.com>,
        Ard Biesheuvel <ardb@...nel.org>,
        Alexandre Ghiti <alexghiti@...osinc.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Atish Kumar Patra <atishp@...osinc.com>
Subject: Re: [PATCH v2 -next 4/4] clocksource/timer-riscv: ACPI: Add
 timer_cannot_wakeup_cpu

On Wed, Sep 27, 2023 at 10:30:15PM +0530, Sunil V L wrote:
> The timer capability to wakeup the cpu irrespective of its idle state is
> provided by the flag in RHCT. Update the timer code to set this flag.
> 
> Signed-off-by: Sunil V L <sunilvl@...tanamicro.com>
> ---
>  drivers/clocksource/timer-riscv.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/clocksource/timer-riscv.c b/drivers/clocksource/timer-riscv.c
> index 9c8f3e2decc2..06f5bad3c3e0 100644
> --- a/drivers/clocksource/timer-riscv.c
> +++ b/drivers/clocksource/timer-riscv.c
> @@ -225,6 +225,10 @@ 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)
>  {
> +	struct acpi_table_rhct *rhct = (struct acpi_table_rhct *)table;
> +
> +	riscv_timer_cannot_wake_cpu = rhct->flags & ACPI_RHCT_TIMER_CANNOT_WAKEUP_CPU;
> +
>  	return riscv_timer_init_common();
>  }
>  
> -- 
> 2.39.2
>

Reviewed-by: Andrew Jones <ajones@...tanamicro.com>