linux-kernel - [PATCH v4 2/5] clk: qcom: clk-alpha-pll: modularize alpha_pll_trion_set

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Date:   Mon, 18 Jan 2021 10:13:18 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Stephen Boyd <sboyd@...nel.org>
Cc:     linux-arm-msm@...r.kernel.org,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Vinod Koul <vkoul@...nel.org>, Andy Gross <agross@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        Taniya Das <tdas@...eaurora.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v4 2/5] clk: qcom: clk-alpha-pll: modularize alpha_pll_trion_set_rate()

Trion 5LPE set rate uses code similar to alpha_pll_trion_set_rate() but
with different registers. Modularize these by moving out latch and latch
ack bits so that we can reuse the function.

Suggested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...ainline.org>
Signed-off-by: Vinod Koul <vkoul@...nel.org>
---
 drivers/clk/qcom/clk-alpha-pll.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c
index f7721088494c..a30ea7b09224 100644
--- a/drivers/clk/qcom/clk-alpha-pll.c
+++ b/drivers/clk/qcom/clk-alpha-pll.c
@@ -1471,8 +1471,8 @@ static int alpha_pll_lucid_prepare(struct clk_hw *hw)
 	return __alpha_pll_trion_prepare(hw, LUCID_PCAL_DONE);
 }
 
-static int alpha_pll_trion_set_rate(struct clk_hw *hw, unsigned long rate,
-				    unsigned long prate)
+static int __alpha_pll_trion_set_rate(struct clk_hw *hw, unsigned long rate,
+				      unsigned long prate, u32 latch_bit, u32 latch_ack)
 {
 	struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
 	unsigned long rrate;
@@ -1490,22 +1490,20 @@ static int alpha_pll_trion_set_rate(struct clk_hw *hw, unsigned long rate,
 	regmap_write(pll->clkr.regmap, PLL_ALPHA_VAL(pll), a);
 
 	/* Latch the PLL input */
-	ret = regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll),
-				 PLL_UPDATE, PLL_UPDATE);
+	ret = regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll), latch_bit, latch_bit);
 	if (ret)
 		return ret;
 
 	/* Wait for 2 reference cycles before checking the ACK bit. */
 	udelay(1);
 	regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val);
-	if (!(val & ALPHA_PLL_ACK_LATCH)) {
+	if (!(val & latch_ack)) {
 		pr_err("Lucid PLL latch failed. Output may be unstable!\n");
 		return -EINVAL;
 	}
 
 	/* Return the latch input to 0 */
-	ret = regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll),
-				 PLL_UPDATE, 0);
+	ret = regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll), latch_bit, 0);
 	if (ret)
 		return ret;
 
@@ -1520,6 +1518,12 @@ static int alpha_pll_trion_set_rate(struct clk_hw *hw, unsigned long rate,
 	return 0;
 }
 
+static int alpha_pll_trion_set_rate(struct clk_hw *hw, unsigned long rate,
+				    unsigned long prate)
+{
+	return __alpha_pll_trion_set_rate(hw, rate, prate, PLL_UPDATE, ALPHA_PLL_ACK_LATCH);
+}
+
 const struct clk_ops clk_alpha_pll_trion_ops = {
 	.prepare = alpha_pll_trion_prepare,
 	.enable = clk_trion_pll_enable,
-- 
2.26.2