linux-kernel - [PATCH v2 9/9] clk: qcom: gcc-msm8994: Add a quirk for a different SDCC configuration

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Date:   Wed,  9 Jun 2021 16:55:21 +0200
From:   Konrad Dybcio <konrad.dybcio@...ainline.org>
To:     ~postmarketos/upstreaming@...ts.sr.ht
Cc:     martin.botka@...ainline.org,
        angelogioacchino.delregno@...ainline.org,
        marijn.suijten@...ainline.org, jamipkettunen@...ainline.org,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Taniya Das <tdas@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 9/9] clk: qcom: gcc-msm8994: Add a quirk for a different SDCC configuration

Some devices come with a different SDCC clock configuration,
account for that.

Signed-off-by: Konrad Dybcio <konrad.dybcio@...ainline.org>
---
 .../bindings/clock/qcom,gcc-msm8994.yaml         |  4 ++++
 drivers/clk/qcom/gcc-msm8994.c                   | 16 ++++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/Documentation/devicetree/bindings/clock/qcom,gcc-msm8994.yaml b/Documentation/devicetree/bindings/clock/qcom,gcc-msm8994.yaml
index b44a844d894c..4ba2f72d3cad 100644
--- a/Documentation/devicetree/bindings/clock/qcom,gcc-msm8994.yaml
+++ b/Documentation/devicetree/bindings/clock/qcom,gcc-msm8994.yaml
@@ -49,6 +49,10 @@ properties:
     description:
       Protected clock specifier list as per common clock binding.
 
+  qcom,sdcc2-clk-src-40mhz:
+    description: SDCC2_APPS clock source runs at 40MHz.
+    type: boolean
+
 required:
   - compatible
   - reg
diff --git a/drivers/clk/qcom/gcc-msm8994.c b/drivers/clk/qcom/gcc-msm8994.c
index bc8ad4973dd9..4903b07964dc 100644
--- a/drivers/clk/qcom/gcc-msm8994.c
+++ b/drivers/clk/qcom/gcc-msm8994.c
@@ -1012,6 +1012,19 @@ static struct clk_rcg2 sdcc1_apps_clk_src = {
 	},
 };
 
+static struct freq_tbl ftbl_sdcc2_40mhz_apps_clk_src[] = {
+	F(144000, P_XO, 16, 3, 25),
+	F(400000, P_XO, 12, 1, 4),
+	F(20000000, P_GPLL0, 15, 1, 2),
+	F(25000000, P_GPLL0, 12, 1, 2),
+	F(40000000, P_GPLL0, 15, 0, 0),
+	F(50000000, P_GPLL0, 12, 0, 0),
+	F(80000000, P_GPLL0, 7.5, 0, 0),
+	F(100000000, P_GPLL0, 6, 0, 0),
+	F(200000000, P_GPLL0, 3, 0, 0),
+	{ }
+};
+
 static struct freq_tbl ftbl_sdcc2_4_apps_clk_src[] = {
 	F(144000, P_XO, 16, 3, 25),
 	F(400000, P_XO, 12, 1, 4),
@@ -2788,6 +2801,9 @@ static int gcc_msm8994_probe(struct platform_device *pdev)
 		gcc_msm8994_desc.clks[GCC_SYS_NOC_UFS_AXI_CLK] = NULL;
 	}
 
+	if (of_find_property(dev->of_node, "qcom,sdcc2-clk-src-40mhz", NULL))
+		sdcc2_apps_clk_src.freq_tbl = ftbl_sdcc2_40mhz_apps_clk_src;
+
 	return qcom_cc_probe(pdev, &gcc_msm8994_desc);
 }
 
-- 
2.31.1