linux-kernel - Re: [PATCH 2/2] clk: qcom: camcc-x1e80100: Set titan_top_gdsc as the parent GDSC of subordinate GDSCs

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Date: Mon, 11 Mar 2024 20:52:21 +0530
From: Rajendra Nayak <quic_rjendra@...cinc.com>
To: Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Bjorn Andersson
	<andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Michael
 Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, Rob
 Herring <robh@...nel.org>,
        Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>,
        Abel Vesa
	<abel.vesa@...aro.org>
CC: <linux-arm-msm@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] clk: qcom: camcc-x1e80100: Set titan_top_gdsc as the
 parent GDSC of subordinate GDSCs



On 3/11/2024 6:03 AM, Bryan O'Donoghue wrote:
> The Titan TOP GDSC is the parent GDSC for all other GDSCs in the CAMCC
> block. None of the subordinate blocks will switch on without the parent
> GDSC switched on.
> 
> Fixes: 76126a5129b5 ("clk: qcom: Add camcc clock driver for x1e80100")
> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>

Acked-by: Rajendra Nayak <quic_rjendra@...cinc.com>

> ---
>   drivers/clk/qcom/camcc-x1e80100.c | 7 +++++++
>   1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/clk/qcom/camcc-x1e80100.c b/drivers/clk/qcom/camcc-x1e80100.c
> index 46bb225906bff..d421da57697a2 100644
> --- a/drivers/clk/qcom/camcc-x1e80100.c
> +++ b/drivers/clk/qcom/camcc-x1e80100.c
> @@ -2212,6 +2212,8 @@ static struct clk_branch cam_cc_sfe_0_fast_ahb_clk = {
>   	},
>   };
>   
> +static struct gdsc cam_cc_titan_top_gdsc;
> +
>   static struct gdsc cam_cc_bps_gdsc = {
>   	.gdscr = 0x10004,
>   	.en_rest_wait_val = 0x2,
> @@ -2221,6 +2223,7 @@ static struct gdsc cam_cc_bps_gdsc = {
>   		.name = "cam_cc_bps_gdsc",
>   	},
>   	.pwrsts = PWRSTS_OFF_ON,
> +	.parent = &cam_cc_titan_top_gdsc.pd,
>   	.flags = POLL_CFG_GDSCR | RETAIN_FF_ENABLE,
>   };
>   
> @@ -2233,6 +2236,7 @@ static struct gdsc cam_cc_ife_0_gdsc = {
>   		.name = "cam_cc_ife_0_gdsc",
>   	},
>   	.pwrsts = PWRSTS_OFF_ON,
> +	.parent = &cam_cc_titan_top_gdsc.pd,
>   	.flags = POLL_CFG_GDSCR | RETAIN_FF_ENABLE,
>   };
>   
> @@ -2245,6 +2249,7 @@ static struct gdsc cam_cc_ife_1_gdsc = {
>   		.name = "cam_cc_ife_1_gdsc",
>   	},
>   	.pwrsts = PWRSTS_OFF_ON,
> +	.parent = &cam_cc_titan_top_gdsc.pd,
>   	.flags = POLL_CFG_GDSCR | RETAIN_FF_ENABLE,
>   };
>   
> @@ -2257,6 +2262,7 @@ static struct gdsc cam_cc_ipe_0_gdsc = {
>   		.name = "cam_cc_ipe_0_gdsc",
>   	},
>   	.pwrsts = PWRSTS_OFF_ON,
> +	.parent = &cam_cc_titan_top_gdsc.pd,
>   	.flags = POLL_CFG_GDSCR | RETAIN_FF_ENABLE,
>   };
>   
> @@ -2269,6 +2275,7 @@ static struct gdsc cam_cc_sfe_0_gdsc = {
>   		.name = "cam_cc_sfe_0_gdsc",
>   	},
>   	.pwrsts = PWRSTS_OFF_ON,
> +	.parent = &cam_cc_titan_top_gdsc.pd,
>   	.flags = POLL_CFG_GDSCR | RETAIN_FF_ENABLE,
>   };
>   
>