linux-kernel - [PATCH v2 08/28] clk: renesas: rzg2l: add struct clk_hw

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Message-Id: <20230929053915.1530607-9-claudiu.beznea@bp.renesas.com>
Date:   Fri, 29 Sep 2023 08:38:55 +0300
From:   Claudiu <claudiu.beznea@...on.dev>
To:     geert+renesas@...der.be, mturquette@...libre.com, sboyd@...nel.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, linus.walleij@...aro.org,
        gregkh@...uxfoundation.org, jirislaby@...nel.org,
        magnus.damm@...il.com, catalin.marinas@....com, will@...nel.org,
        quic_bjorande@...cinc.com, konrad.dybcio@...aro.org, arnd@...db.de,
        neil.armstrong@...aro.org, prabhakar.mahadev-lad.rj@...renesas.com,
        biju.das.jz@...renesas.com
Cc:     linux-renesas-soc@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-serial@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v2 08/28] clk: renesas: rzg2l: add struct clk_hw_data

From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>

Add clk_hw_data struct that keeps the core part of a clock data. The
sd_hw_data embeds a member of type struct clk_hw_data along with other
members (in the next commits). This commit prepares the field for
refactoring the SD MUX clock driver.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
---

Changes in v2:
- collected tags

 drivers/clk/renesas/rzg2l-cpg.c | 52 +++++++++++++++++++++------------
 1 file changed, 34 insertions(+), 18 deletions(-)

diff --git a/drivers/clk/renesas/rzg2l-cpg.c b/drivers/clk/renesas/rzg2l-cpg.c
index 02058a2d39ca..ac05463d1d98 100644
--- a/drivers/clk/renesas/rzg2l-cpg.c
+++ b/drivers/clk/renesas/rzg2l-cpg.c
@@ -63,13 +63,29 @@
 
 #define MAX_VCLK_FREQ		(148500000)
 
-struct sd_hw_data {
+/**
+ * struct clk_hw_data - clock hardware data
+ * @hw: clock hw
+ * @conf: clock configuration (register offset, shift, width)
+ * @priv: CPG private data structure
+ */
+struct clk_hw_data {
 	struct clk_hw hw;
 	u32 conf;
 	struct rzg2l_cpg_priv *priv;
 };
 
-#define to_sd_hw_data(_hw)	container_of(_hw, struct sd_hw_data, hw)
+#define to_clk_hw_data(_hw)	container_of(_hw, struct clk_hw_data, hw)
+
+/**
+ * struct sd_hw_data - SD clock hardware data
+ * @hw_data: clock hw data
+ */
+struct sd_hw_data {
+	struct clk_hw_data hw_data;
+};
+
+#define to_sd_hw_data(_hw)	container_of(_hw, struct sd_hw_data, hw_data)
 
 struct rzg2l_pll5_param {
 	u32 pl5_fracin;
@@ -188,10 +204,10 @@ rzg2l_cpg_mux_clk_register(const struct cpg_core_clk *core,
 
 static int rzg2l_cpg_sd_clk_mux_set_parent(struct clk_hw *hw, u8 index)
 {
-	struct sd_hw_data *hwdata = to_sd_hw_data(hw);
-	struct rzg2l_cpg_priv *priv = hwdata->priv;
-	u32 off = GET_REG_OFFSET(hwdata->conf);
-	u32 shift = GET_SHIFT(hwdata->conf);
+	struct clk_hw_data *clk_hw_data = to_clk_hw_data(hw);
+	struct rzg2l_cpg_priv *priv = clk_hw_data->priv;
+	u32 off = GET_REG_OFFSET(clk_hw_data->conf);
+	u32 shift = GET_SHIFT(clk_hw_data->conf);
 	const u32 clk_src_266 = 2;
 	u32 msk, val, bitmask;
 	unsigned long flags;
@@ -208,7 +224,7 @@ static int rzg2l_cpg_sd_clk_mux_set_parent(struct clk_hw *hw, u8 index)
 	 * The clock mux has 3 input clocks(533 MHz, 400 MHz, and 266 MHz), and
 	 * the index to value mapping is done by adding 1 to the index.
 	 */
-	bitmask = (GENMASK(GET_WIDTH(hwdata->conf) - 1, 0) << shift) << 16;
+	bitmask = (GENMASK(GET_WIDTH(clk_hw_data->conf) - 1, 0) << shift) << 16;
 	msk = off ? CPG_CLKSTATUS_SELSDHI1_STS : CPG_CLKSTATUS_SELSDHI0_STS;
 	spin_lock_irqsave(&priv->rmw_lock, flags);
 	if (index != clk_src_266) {
@@ -237,12 +253,12 @@ static int rzg2l_cpg_sd_clk_mux_set_parent(struct clk_hw *hw, u8 index)
 
 static u8 rzg2l_cpg_sd_clk_mux_get_parent(struct clk_hw *hw)
 {
-	struct sd_hw_data *hwdata = to_sd_hw_data(hw);
-	struct rzg2l_cpg_priv *priv = hwdata->priv;
-	u32 val = readl(priv->base + GET_REG_OFFSET(hwdata->conf));
+	struct clk_hw_data *clk_hw_data = to_clk_hw_data(hw);
+	struct rzg2l_cpg_priv *priv = clk_hw_data->priv;
+	u32 val = readl(priv->base + GET_REG_OFFSET(clk_hw_data->conf));
 
-	val >>= GET_SHIFT(hwdata->conf);
-	val &= GENMASK(GET_WIDTH(hwdata->conf) - 1, 0);
+	val >>= GET_SHIFT(clk_hw_data->conf);
+	val &= GENMASK(GET_WIDTH(clk_hw_data->conf) - 1, 0);
 
 	return val ? val - 1 : 0;
 }
@@ -258,17 +274,17 @@ rzg2l_cpg_sd_mux_clk_register(const struct cpg_core_clk *core,
 			      void __iomem *base,
 			      struct rzg2l_cpg_priv *priv)
 {
-	struct sd_hw_data *clk_hw_data;
+	struct sd_hw_data *sd_hw_data;
 	struct clk_init_data init;
 	struct clk_hw *clk_hw;
 	int ret;
 
-	clk_hw_data = devm_kzalloc(priv->dev, sizeof(*clk_hw_data), GFP_KERNEL);
-	if (!clk_hw_data)
+	sd_hw_data = devm_kzalloc(priv->dev, sizeof(*sd_hw_data), GFP_KERNEL);
+	if (!sd_hw_data)
 		return ERR_PTR(-ENOMEM);
 
-	clk_hw_data->priv = priv;
-	clk_hw_data->conf = core->conf;
+	sd_hw_data->hw_data.priv = priv;
+	sd_hw_data->hw_data.conf = core->conf;
 
 	init.name = core->name;
 	init.ops = &rzg2l_cpg_sd_clk_mux_ops;
@@ -276,7 +292,7 @@ rzg2l_cpg_sd_mux_clk_register(const struct cpg_core_clk *core,
 	init.num_parents = core->num_parents;
 	init.parent_names = core->parent_names;
 
-	clk_hw = &clk_hw_data->hw;
+	clk_hw = &sd_hw_data->hw_data.hw;
 	clk_hw->init = &init;
 
 	ret = devm_clk_hw_register(priv->dev, clk_hw);
-- 
2.39.2