linux-kernel - [PATCH v2 2/9] clk: qcom: gcc-sdm660: Mark GPU CFG AHB clock as critical

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Date:   Wed, 13 Jan 2021 19:38:10 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>
To:     agross@...nel.org
Cc:     bjorn.andersson@...aro.org, mturquette@...libre.com,
        robh+dt@...nel.org, linux-arm-msm@...r.kernel.org,
        linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, phone-devel@...r.kernel.org,
        konrad.dybcio@...ainline.org, marijn.suijten@...ainline.org,
        martin.botka@...ainline.org,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>
Subject: [PATCH v2 2/9] clk: qcom: gcc-sdm660: Mark GPU CFG AHB clock as critical

This clock is critical for any access to the GPU: gating it will
crash the system when the GPU has been initialized (so, you cannot
gate it unless you deinit the Adreno completely).

So, to achieve a working state with GPU on, set the CLK_IS_CRITICAL
flag to this clock.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...ainline.org>
---
 drivers/clk/qcom/gcc-sdm660.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/clk/qcom/gcc-sdm660.c b/drivers/clk/qcom/gcc-sdm660.c
index 3b7181d0ff71..6394257ca8c0 100644
--- a/drivers/clk/qcom/gcc-sdm660.c
+++ b/drivers/clk/qcom/gcc-sdm660.c
@@ -1571,6 +1571,7 @@ static struct clk_branch gcc_gpu_cfg_ahb_clk = {
 		.hw.init = &(struct clk_init_data){
 			.name = "gcc_gpu_cfg_ahb_clk",
 			.ops = &clk_branch2_ops,
+			.flags = CLK_IS_CRITICAL,
 		},
 	},
 };
-- 
2.29.2