linux-kernel - [PATCH v2 3/3] clk: qcom: cbf-msm8996: Add support for MSM8996 Pro

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Message-Id: <20230527093934.101335-4-y.oudjana@protonmail.com>
Date:   Sat, 27 May 2023 12:39:34 +0300
From:   Yassine Oudjana <yassine.oudjana@...il.com>
To:     Andy Gross <agross@...nel.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+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     Yassine Oudjana <y.oudjana@...tonmail.com>,
        Yassine Oudjana <yassine.oudjana@...il.com>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 3/3] clk: qcom: cbf-msm8996: Add support for MSM8996 Pro

From: Yassine Oudjana <y.oudjana@...tonmail.com>

The CBF PLL on MSM8996 Pro has a /4 post divisor instead of /2. Handle the
difference accordingly.

Signed-off-by: Yassine Oudjana <y.oudjana@...tonmail.com>
---
 drivers/clk/qcom/clk-cbf-8996.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/qcom/clk-cbf-8996.c b/drivers/clk/qcom/clk-cbf-8996.c
index cfd567636f4e..ab988e6f1976 100644
--- a/drivers/clk/qcom/clk-cbf-8996.c
+++ b/drivers/clk/qcom/clk-cbf-8996.c
@@ -48,7 +48,7 @@ static const u8 cbf_pll_regs[PLL_OFF_MAX_REGS] = {
 	[PLL_OFF_STATUS] = 0x28,
 };
 
-static const struct alpha_pll_config cbfpll_config = {
+static struct alpha_pll_config cbfpll_config = {
 	.l = 72,
 	.config_ctl_val = 0x200d4828,
 	.config_ctl_hi_val = 0x006,
@@ -137,7 +137,7 @@ static int clk_cbf_8996_mux_determine_rate(struct clk_hw *hw,
 {
 	struct clk_hw *parent;
 
-	if (req->rate < (DIV_THRESHOLD / 2))
+	if (req->rate < (DIV_THRESHOLD / cbf_pll_postdiv.div))
 		return -EINVAL;
 
 	if (req->rate < DIV_THRESHOLD)
@@ -265,6 +265,11 @@ static int qcom_msm8996_cbf_probe(struct platform_device *pdev)
 	/* Switch CBF to use the primary PLL */
 	regmap_update_bits(regmap, CBF_MUX_OFFSET, CBF_MUX_PARENT_MASK, 0x1);
 
+	if (of_device_is_compatible(dev->of_node, "qcom,msm8996pro-cbf")) {
+		cbfpll_config.post_div_val = 0x3 << 8;
+		cbf_pll_postdiv.div = 4;
+	}
+
 	for (i = 0; i < ARRAY_SIZE(cbf_msm8996_hw_clks); i++) {
 		ret = devm_clk_hw_register(dev, cbf_msm8996_hw_clks[i]);
 		if (ret)
@@ -286,6 +291,7 @@ static int qcom_msm8996_cbf_probe(struct platform_device *pdev)
 
 static const struct of_device_id qcom_msm8996_cbf_match_table[] = {
 	{ .compatible = "qcom,msm8996-cbf" },
+	{ .compatible = "qcom,msm8996pro-cbf" },
 	{ /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, qcom_msm8996_cbf_match_table);
-- 
2.40.1