linux-kernel - Re: [PATCH 3/6] clk: qcom: apss-ipq6018: mark apcs_alias0_core

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Message-ID: <CAA8EJprxxrCYEaD73GO98wnbE1z0mxHxiDit6ML8kB+XpKu8pw@mail.gmail.com>
Date:   Mon, 11 Jul 2022 15:49:59 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Robert Marko <robimarko@...il.com>
Cc:     bjorn.andersson@...aro.org, agross@...nel.org,
        konrad.dybcio@...ainline.org, mturquette@...libre.com,
        sboyd@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, sivaprak@...eaurora.org,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/6] clk: qcom: apss-ipq6018: mark apcs_alias0_core_clk as critical

On Mon, 11 Jul 2022 at 14:22, Robert Marko <robimarko@...il.com> wrote:
>
> While fixing up the driver I noticed that my IPQ8074 board was hanging
> after CPUFreq switched the frequency during boot, WDT would eventually
> reset it.
>
> So mark apcs_alias0_core_clk as critical since its the clock feeding the
> CPU cluster and must never be disabled.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

>
> Fixes: 5e77b4ef1b19 ("clk: qcom: Add ipq6018 apss clock controller")
> Signed-off-by: Robert Marko <robimarko@...il.com>
> ---
>  drivers/clk/qcom/apss-ipq6018.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/clk/qcom/apss-ipq6018.c b/drivers/clk/qcom/apss-ipq6018.c
> index be952d417ded..f2f502e2d5a4 100644
> --- a/drivers/clk/qcom/apss-ipq6018.c
> +++ b/drivers/clk/qcom/apss-ipq6018.c
> @@ -56,7 +56,7 @@ static struct clk_branch apcs_alias0_core_clk = {
>                         .parent_hws = (const struct clk_hw *[]){
>                                 &apcs_alias0_clk_src.clkr.hw },
>                         .num_parents = 1,
> -                       .flags = CLK_SET_RATE_PARENT,
> +                       .flags = CLK_SET_RATE_PARENT | CLK_IS_CRITICAL,
>                         .ops = &clk_branch2_ops,
>                 },
>         },
> --
> 2.36.1
>


-- 
With best wishes
Dmitry