linux-kernel - Re: [PATCH 1/2] clk: gcc-sc8280xp: keep PCIe power-domains always-on

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Message-ID: <20220806151049.GI14384@thinkpad>
Date:   Sat, 6 Aug 2022 20:40:49 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Johan Hovold <johan+linaro@...nel.org>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, linux-arm-msm@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] clk: gcc-sc8280xp: keep PCIe power-domains always-on

On Fri, Aug 05, 2022 at 02:12:49PM +0200, Johan Hovold wrote:
> The Qualcomm PCIe driver does not yet implement suspend so to keep the
> PCIe power domains always-on for now to avoid crashing during resume.
> 
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

Thanks,
Mani

> ---
>  drivers/clk/qcom/gcc-sc8280xp.c | 14 +++++++++-----
>  1 file changed, 9 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/clk/qcom/gcc-sc8280xp.c b/drivers/clk/qcom/gcc-sc8280xp.c
> index a2f3ffcc5849..eaeada42e13a 100644
> --- a/drivers/clk/qcom/gcc-sc8280xp.c
> +++ b/drivers/clk/qcom/gcc-sc8280xp.c
> @@ -6768,6 +6768,10 @@ static struct gdsc pcie_1_tunnel_gdsc = {
>  	.flags = VOTABLE,
>  };
>  
> +/*
> + * The Qualcomm PCIe driver does not yet implement suspend so to keep the
> + * PCIe power domains always-on for now.
> + */
>  static struct gdsc pcie_2a_gdsc = {
>  	.gdscr = 0x9d004,
>  	.collapse_ctrl = 0x52128,
> @@ -6776,7 +6780,7 @@ static struct gdsc pcie_2a_gdsc = {
>  		.name = "pcie_2a_gdsc",
>  	},
>  	.pwrsts = PWRSTS_OFF_ON,
> -	.flags = VOTABLE,
> +	.flags = VOTABLE | ALWAYS_ON,
>  };
>  
>  static struct gdsc pcie_2b_gdsc = {
> @@ -6787,7 +6791,7 @@ static struct gdsc pcie_2b_gdsc = {
>  		.name = "pcie_2b_gdsc",
>  	},
>  	.pwrsts = PWRSTS_OFF_ON,
> -	.flags = VOTABLE,
> +	.flags = VOTABLE | ALWAYS_ON,
>  };
>  
>  static struct gdsc pcie_3a_gdsc = {
> @@ -6798,7 +6802,7 @@ static struct gdsc pcie_3a_gdsc = {
>  		.name = "pcie_3a_gdsc",
>  	},
>  	.pwrsts = PWRSTS_OFF_ON,
> -	.flags = VOTABLE,
> +	.flags = VOTABLE | ALWAYS_ON,
>  };
>  
>  static struct gdsc pcie_3b_gdsc = {
> @@ -6809,7 +6813,7 @@ static struct gdsc pcie_3b_gdsc = {
>  		.name = "pcie_3b_gdsc",
>  	},
>  	.pwrsts = PWRSTS_OFF_ON,
> -	.flags = VOTABLE,
> +	.flags = VOTABLE | ALWAYS_ON,
>  };
>  
>  static struct gdsc pcie_4_gdsc = {
> @@ -6820,7 +6824,7 @@ static struct gdsc pcie_4_gdsc = {
>  		.name = "pcie_4_gdsc",
>  	},
>  	.pwrsts = PWRSTS_OFF_ON,
> -	.flags = VOTABLE,
> +	.flags = VOTABLE | ALWAYS_ON,
>  };
>  
>  static struct gdsc ufs_card_gdsc = {
> -- 
> 2.35.1
> 

-- 
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