clk: at91: clk-utmi: add support for parent_hw

Add support for parent_hw in utmi clock drivers.
With this parent-child relation is described with pointers rather
than strings making registration a bit faster.

All the SoC based drivers that rely on clk-utmi were adapted
to the new API change. The switch itself for SoCs will be done
in subsequent patches.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20230615093227.576102-8-claudiu.beznea@microchip.com

Author: claudiubeznea

drivers/clk/at91/at91sam9g45.c

@@ -145,7 +145,7 @@ static void __init at91sam9g45_pmc_setup(struct device_node *np)
 
 	at91sam9g45_pmc->chws[PMC_PLLACK] = hw;
 
-	hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck");
+	hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck", NULL);
 	if (IS_ERR(hw))
 		goto err_free;
 

drivers/clk/at91/at91sam9rl.c

@@ -109,7 +109,7 @@ static void __init at91sam9rl_pmc_setup(struct device_node *np)
 
 	at91sam9rl_pmc->chws[PMC_PLLACK] = hw;
 
-	hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck");
+	hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck", NULL);
 	if (IS_ERR(hw))
 		goto err_free;
 

drivers/clk/at91/at91sam9x5.c

@@ -193,7 +193,7 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np,
 
 	at91sam9x5_pmc->chws[PMC_PLLACK] = hw;
 
-	hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck");
+	hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck", NULL);
 	if (IS_ERR(hw))
 		goto err_free;
 

drivers/clk/at91/clk-utmi.c

@@ -144,21 +144,30 @@ static struct clk_hw * __init
 at91_clk_register_utmi_internal(struct regmap *regmap_pmc,
 				struct regmap *regmap_sfr,
 				const char *name, const char *parent_name,
+				struct clk_hw *parent_hw,
 				const struct clk_ops *ops, unsigned long flags)
 {
 	struct clk_utmi *utmi;
 	struct clk_hw *hw;
-	struct clk_init_data init;
+	struct clk_init_data init = {};
 	int ret;
 
+	if (!(parent_name || parent_hw))
+		return ERR_PTR(-EINVAL);
+
 	utmi = kzalloc(sizeof(*utmi), GFP_KERNEL);
 	if (!utmi)
 		return ERR_PTR(-ENOMEM);
 
 	init.name = name;
 	init.ops = ops;
-	init.parent_names = parent_name ? &parent_name : NULL;
-	init.num_parents = parent_name ? 1 : 0;
+	if (parent_hw) {
+		init.parent_hws = parent_hw ? (const struct clk_hw **)&parent_hw : NULL;
+		init.num_parents = parent_hw ? 1 : 0;
+	} else {
+		init.parent_names = parent_name ? &parent_name : NULL;
+		init.num_parents = parent_name ? 1 : 0;
+	}
 	init.flags = flags;
 
 	utmi->hw.init = &init;
@@ -177,10 +186,11 @@ at91_clk_register_utmi_internal(struct regmap *regmap_pmc,
 
 struct clk_hw * __init
 at91_clk_register_utmi(struct regmap *regmap_pmc, struct regmap *regmap_sfr,
-		       const char *name, const char *parent_name)
+		       const char *name, const char *parent_name,
+		       struct clk_hw *parent_hw)
 {
 	return at91_clk_register_utmi_internal(regmap_pmc, regmap_sfr, name,
-			parent_name, &utmi_ops, CLK_SET_RATE_GATE);
+			parent_name, parent_hw, &utmi_ops, CLK_SET_RATE_GATE);
 }
 
 static int clk_utmi_sama7g5_prepare(struct clk_hw *hw)
@@ -279,8 +289,8 @@ static const struct clk_ops sama7g5_utmi_ops = {
 
 struct clk_hw * __init
 at91_clk_sama7g5_register_utmi(struct regmap *regmap_pmc, const char *name,
-			       const char *parent_name)
+			       const char *parent_name, struct clk_hw *parent_hw)
 {
 	return at91_clk_register_utmi_internal(regmap_pmc, NULL, name,
-			parent_name, &sama7g5_utmi_ops, 0);
+			parent_name, parent_hw, &sama7g5_utmi_ops, 0);
 }

drivers/clk/at91/dt-compat.c

@@ -1055,7 +1055,7 @@ static void __init of_at91sam9x5_clk_utmi_setup(struct device_node *np)
 			regmap_sfr = NULL;
 	}
 
-	hw = at91_clk_register_utmi(regmap_pmc, regmap_sfr, name, parent_name);
+	hw = at91_clk_register_utmi(regmap_pmc, regmap_sfr, name, parent_name, NULL);
 	if (IS_ERR(hw))
 		return;
 

drivers/clk/at91/pmc.h

@@ -269,10 +269,11 @@ at91rm9200_clk_register_usb(struct regmap *regmap, const char *name,
 
 struct clk_hw * __init
 at91_clk_register_utmi(struct regmap *regmap_pmc, struct regmap *regmap_sfr,
-		       const char *name, const char *parent_name);
+		       const char *name, const char *parent_name,
+		       struct clk_hw *parent_hw);
 
 struct clk_hw * __init
 at91_clk_sama7g5_register_utmi(struct regmap *regmap, const char *name,
-			       const char *parent_name);
+			       const char *parent_name, struct clk_hw *parent_hw);
 
 #endif /* __PMC_H_ */

drivers/clk/at91/sama5d2.c

@@ -249,7 +249,7 @@ static void __init sama5d2_pmc_setup(struct device_node *np)
 	if (IS_ERR(regmap_sfr))
 		regmap_sfr = NULL;
 
-	hw = at91_clk_register_utmi(regmap, regmap_sfr, "utmick", "mainck");
+	hw = at91_clk_register_utmi(regmap, regmap_sfr, "utmick", "mainck", NULL);
 	if (IS_ERR(hw))
 		goto err_free;
 

drivers/clk/at91/sama5d3.c

@@ -172,7 +172,7 @@ static void __init sama5d3_pmc_setup(struct device_node *np)
 
 	sama5d3_pmc->chws[PMC_PLLACK] = hw;
 
-	hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck");
+	hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck", NULL);
 	if (IS_ERR(hw))
 		goto err_free;
 

drivers/clk/at91/sama5d4.c

@@ -187,7 +187,7 @@ static void __init sama5d4_pmc_setup(struct device_node *np)
 
 	sama5d4_pmc->chws[PMC_PLLACK] = hw;
 
-	hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck");
+	hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck", NULL);
 	if (IS_ERR(hw))
 		goto err_free;
 

drivers/clk/at91/sama7g5.c

@@ -1035,7 +1035,7 @@ static void __init sama7g5_pmc_setup(struct device_node *np)
 			sama7g5_pmc->chws[sama7g5_mckx[i].eid] = hw;
 	}
 
-	hw = at91_clk_sama7g5_register_utmi(regmap, "utmick", "main_xtal");
+	hw = at91_clk_sama7g5_register_utmi(regmap, "utmick", "main_xtal", NULL);
 	if (IS_ERR(hw))
 		goto err_free;