linux-kernel - [PATCH 5/9] drm/msm/dsi_phy_28nm_8960: Replace parent names with clk

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Date:   Mon, 23 May 2022 23:38:33 +0200
From:   Marijn Suijten <marijn.suijten@...ainline.org>
To:     phone-devel@...r.kernel.org, Stephen Boyd <sboyd@...nel.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     ~postmarketos/upstreaming@...ts.sr.ht,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Martin Botka <martin.botka@...ainline.org>,
        Jami Kettunen <jami.kettunen@...ainline.org>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        Michael Turquette <mturquette@...libre.com>,
        Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Rajeev Nandan <quic_rajeevny@...cinc.com>,
        Vladimir Lypak <vladimir.lypak@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Jonathan Marek <jonathan@...ek.ca>, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org
Subject: [PATCH 5/9] drm/msm/dsi_phy_28nm_8960: Replace parent names with clk_hw pointers

parent_hw pointers are easier to manage and cheaper to use than
repeatedly formatting the parent name and subsequently leaving the clk
framework to perform lookups based on that name.

Signed-off-by: Marijn Suijten <marijn.suijten@...ainline.org>
---
 .../gpu/drm/msm/dsi/phy/dsi_phy_28nm_8960.c    | 18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm_8960.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm_8960.c
index fc56cdcc9ad6..943a7e847c90 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm_8960.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm_8960.c
@@ -383,7 +383,7 @@ static int dsi_28nm_pll_restore_state(struct msm_dsi_phy *phy)

 static int pll_28nm_register(struct dsi_pll_28nm *pll_28nm, struct clk_hw **provided_clocks)
 {
-	char *clk_name, *parent_name, *vco_name;
+	char *clk_name, *vco_name;
 	struct clk_init_data vco_init = {
 		.parent_data = &(const struct clk_parent_data) {
 			.fw_name = "ref",
@@ -408,10 +408,6 @@ static int pll_28nm_register(struct dsi_pll_28nm *pll_28nm, struct clk_hw **prov
 	if (!vco_name)
 		return -ENOMEM;

-	parent_name = devm_kzalloc(dev, 32, GFP_KERNEL);
-	if (!parent_name)
-		return -ENOMEM;
-
 	clk_name = devm_kzalloc(dev, 32, GFP_KERNEL);
 	if (!clk_name)
 		return -ENOMEM;
@@ -429,13 +425,14 @@ static int pll_28nm_register(struct dsi_pll_28nm *pll_28nm, struct clk_hw **prov
 	bytediv->hw.init = &bytediv_init;
 	bytediv->reg = pll_28nm->phy->pll_base + REG_DSI_28nm_8960_PHY_PLL_CTRL_9;

-	snprintf(parent_name, 32, "dsi%dvco_clk", pll_28nm->phy->id);
 	snprintf(clk_name, 32, "dsi%dpllbyte", pll_28nm->phy->id + 1);

 	bytediv_init.name = clk_name;
 	bytediv_init.ops = &clk_bytediv_ops;
 	bytediv_init.flags = CLK_SET_RATE_PARENT;
-	bytediv_init.parent_names = (const char * const *) &parent_name;
+	bytediv_init.parent_hws = (const struct clk_hw*[]){
+		&pll_28nm->clk_hw,
+	};
 	bytediv_init.num_parents = 1;

 	/* DIV2 */
@@ -446,10 +443,9 @@ static int pll_28nm_register(struct dsi_pll_28nm *pll_28nm, struct clk_hw **prov

 	snprintf(clk_name, 32, "dsi%dpll", pll_28nm->phy->id + 1);
 	/* DIV3 */
-	hw = devm_clk_hw_register_divider(dev, clk_name,
-				parent_name, 0, pll_28nm->phy->pll_base +
-				REG_DSI_28nm_8960_PHY_PLL_CTRL_10,
-				0, 8, 0, NULL);
+	hw = devm_clk_hw_register_divider_parent_hw(dev, clk_name,
+			&pll_28nm->clk_hw, 0, pll_28nm->phy->pll_base +
+			REG_DSI_28nm_8960_PHY_PLL_CTRL_10, 0, 8, 0, NULL);
 	if (IS_ERR(hw))
 		return PTR_ERR(hw);
 	provided_clocks[DSI_PIXEL_PLL_CLK] = hw;
--
2.36.1