linux-kernel - Re: [PATCH V1 1/1] soc: qcom: smp2p: Add enable_irq

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Message-ID: <161647039218.3012082.1225143087605342937@swboyd.mtv.corp.google.com>
Date:   Mon, 22 Mar 2021 20:33:12 -0700
From:   Stephen Boyd <swboyd@...omium.org>
To:     Deepak Kumar Singh <deesin@...eaurora.org>,
        bjorn.andersson@...aro.org, clew@...eaurora.org
Cc:     linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-remoteproc@...r.kernel.org,
        Deepak Kumar Singh <deesin@...eaurora.org>,
        Andy Gross <agross@...nel.org>
Subject: Re: [PATCH V1 1/1] soc: qcom: smp2p: Add enable_irq_wake to SMP2P IRQ

Quoting Deepak Kumar Singh (2021-03-18 11:37:04)
> SMP2P interrupts are expected to wake the processor from suspend.
> Use enable_irq_wake to mark it wakeup capable from suspend.
> 
> Signed-off-by: Chris Lew <clew@...eaurora.org>
> Signed-off-by: Deepak Kumar Singh <deesin@...eaurora.org>
> ---
>  drivers/soc/qcom/smp2p.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/soc/qcom/smp2p.c b/drivers/soc/qcom/smp2p.c
> index 2df4883..df47ee6 100644
> --- a/drivers/soc/qcom/smp2p.c
> +++ b/drivers/soc/qcom/smp2p.c
> @@ -538,6 +538,7 @@ static int qcom_smp2p_probe(struct platform_device *pdev)
>                 goto unwind_interfaces;
>         }
>  
> +       enable_irq_wake(irq);
>  

Can this use device_init_wakeup() and dev_pm_set_wake_irq() instead? I
think that will help us recognize that this irq woke up the CPU and
allow userspace to indicate that it doesn't want to get this wakeup for
some reason.

>         return 0;
>