linux-kernel - [PATCH v2 4/5] clk: qcom: gpucc-sc7280: Add cx collapse reset support

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Date:   Wed, 17 Aug 2022 20:27:53 +0530
From:   Akhil P Oommen <quic_akhilpo@...cinc.com>
To:     freedreno <freedreno@...ts.freedesktop.org>,
        <dri-devel@...ts.freedesktop.org>, <linux-arm-msm@...r.kernel.org>,
        Rob Clark <robdclark@...il.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        "Stephen Boyd" <swboyd@...omium.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
CC:     Douglas Anderson <dianders@...omium.org>,
        <krzysztof.kozlowski@...aro.org>,
        Akhil P Oommen <quic_akhilpo@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, <linux-clk@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 4/5] clk: qcom: gpucc-sc7280: Add cx collapse reset support

Allow a consumer driver to poll for cx gdsc collapse through Reset
framework.

Signed-off-by: Akhil P Oommen <quic_akhilpo@...cinc.com>
---

Changes in v2:
- Minor update to use the updated custom reset ops implementation

 drivers/clk/qcom/gpucc-sc7280.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/clk/qcom/gpucc-sc7280.c b/drivers/clk/qcom/gpucc-sc7280.c
index 9a832f2..d4bc791 100644
--- a/drivers/clk/qcom/gpucc-sc7280.c
+++ b/drivers/clk/qcom/gpucc-sc7280.c
@@ -433,12 +433,22 @@ static const struct regmap_config gpu_cc_sc7280_regmap_config = {
 	.fast_io = true,
 };
 
+struct qcom_reset_ops cx_gdsc_reset = {
+	.reset = gdsc_wait_for_collapse,
+};
+
+static const struct qcom_reset_map gpucc_sc7280_resets[] = {
+	[GPU_CX_COLLAPSE] = { .ops = &cx_gdsc_reset, .priv = &cx_gdsc },
+};
+
 static const struct qcom_cc_desc gpu_cc_sc7280_desc = {
 	.config = &gpu_cc_sc7280_regmap_config,
 	.clks = gpu_cc_sc7280_clocks,
 	.num_clks = ARRAY_SIZE(gpu_cc_sc7280_clocks),
 	.gdscs = gpu_cc_sc7180_gdscs,
 	.num_gdscs = ARRAY_SIZE(gpu_cc_sc7180_gdscs),
+	.resets = gpucc_sc7280_resets,
+	.num_resets = ARRAY_SIZE(gpucc_sc7280_resets),
 };
 
 static const struct of_device_id gpu_cc_sc7280_match_table[] = {
-- 
2.7.4