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From:   Adam Skladowski <a39.skl@gmail.com>
Cc:     phone-devel@vger.kernel.org, ~postmarketos/upstreaming@lists.sr.ht,
        Adam Skladowski <a39.skl@gmail.com>,
        Bjorn Andersson <andersson@kernel.org>,
        Andy Gross <agross@kernel.org>,
        Konrad Dybcio <konrad.dybcio@linaro.org>,
        Michael Turquette <mturquette@baylibre.com>,
        Stephen Boyd <sboyd@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>,
        Marijn Suijten <marijn.suijten@somainline.org>,
        linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/7] clk: qcom: clk-hfpll: Configure l_val in init when required
Date:   Sun, 23 Jul 2023 16:06:49 +0200
Message-Id: <20230723140712.9438-3-a39.skl@gmail.com>
In-Reply-To: <20230723140712.9438-1-a39.skl@gmail.com>
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Add support for pre-configuring default frequency multiplier,
this appears to be required on some platforms like MSM8976.
Without configuring L_VAL device reboots when trying to bring PLL up.

Signed-off-by: Adam Skladowski <a39.skl@gmail.com>
---
 drivers/clk/qcom/clk-hfpll.c | 4 ++++
 drivers/clk/qcom/clk-hfpll.h | 1 +
 2 files changed, 5 insertions(+)

diff --git a/drivers/clk/qcom/clk-hfpll.c b/drivers/clk/qcom/clk-hfpll.c
index 86f728dc69e5..a93b1493c882 100644
--- a/drivers/clk/qcom/clk-hfpll.c
+++ b/drivers/clk/qcom/clk-hfpll.c
@@ -44,6 +44,10 @@ static void __clk_hfpll_init_once(struct clk_hw *hw)
 		regmap_write(regmap, hd->user_reg, regval);
 	}
 
+	/* Write L_VAL from conf if it exist */
+	if (hd->l_val)
+		regmap_write(regmap, hd->l_reg, hd->l_val);
+
 	if (hd->droop_reg)
 		regmap_write(regmap, hd->droop_reg, hd->droop_val);
 
diff --git a/drivers/clk/qcom/clk-hfpll.h b/drivers/clk/qcom/clk-hfpll.h
index 2a57b2fb2f2f..27b9effcb3fd 100644
--- a/drivers/clk/qcom/clk-hfpll.h
+++ b/drivers/clk/qcom/clk-hfpll.h
@@ -18,6 +18,7 @@ struct hfpll_data {
 	u32 status_reg;
 	u8  lock_bit;
 
+	u32 l_val;
 	u32 droop_val;
 	u32 config_val;
 	u32 user_val;
-- 
2.41.0