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

Add support for parent_hw in master 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-master 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/20230615093227.576102-4-claudiu.beznea@microchip.com

drivers/clk/at91/at91rm9200.c

@@ -140,7 +140,7 @@ static void __init at91rm9200_pmc_setup(struct device_node *np)
 	parent_names[2] = "pllack";
 	parent_names[3] = "pllbck";
 	hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4,
-					   parent_names,
+					   parent_names, NULL,
 					   &at91rm9200_master_layout,
 					   &rm9200_mck_characteristics,
 					   &rm9200_mck_lock);
@@ -148,7 +148,7 @@ static void __init at91rm9200_pmc_setup(struct device_node *np)
 		goto err_free;
 
 	hw = at91_clk_register_master_div(regmap, "masterck_div",
-					  "masterck_pres",
+					  "masterck_pres", NULL,
 					  &at91rm9200_master_layout,
 					  &rm9200_mck_characteristics,
 					  &rm9200_mck_lock, CLK_SET_RATE_GATE, 0);

drivers/clk/at91/at91sam9260.c

@@ -416,7 +416,7 @@ static void __init at91sam926x_pmc_setup(struct device_node *np,
 	parent_names[2] = "pllack";
 	parent_names[3] = "pllbck";
 	hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4,
-					   parent_names,
+					   parent_names, NULL,
 					   &at91rm9200_master_layout,
 					   data->mck_characteristics,
 					   &at91sam9260_mck_lock);
@@ -424,7 +424,7 @@ static void __init at91sam926x_pmc_setup(struct device_node *np,
 		goto err_free;
 
 	hw = at91_clk_register_master_div(regmap, "masterck_div",
-					  "masterck_pres",
+					  "masterck_pres", NULL,
 					  &at91rm9200_master_layout,
 					  data->mck_characteristics,
 					  &at91sam9260_mck_lock,

drivers/clk/at91/at91sam9g45.c

@@ -156,7 +156,7 @@ static void __init at91sam9g45_pmc_setup(struct device_node *np)
 	parent_names[2] = "plladivck";
 	parent_names[3] = "utmick";
 	hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4,
-					   parent_names,
+					   parent_names, NULL,
 					   &at91rm9200_master_layout,
 					   &mck_characteristics,
 					   &at91sam9g45_mck_lock);
@@ -164,7 +164,7 @@ static void __init at91sam9g45_pmc_setup(struct device_node *np)
 		goto err_free;
 
 	hw = at91_clk_register_master_div(regmap, "masterck_div",
-					  "masterck_pres",
+					  "masterck_pres", NULL,
 					  &at91rm9200_master_layout,
 					  &mck_characteristics,
 					  &at91sam9g45_mck_lock,

drivers/clk/at91/at91sam9n12.c

@@ -183,7 +183,7 @@ static void __init at91sam9n12_pmc_setup(struct device_node *np)
 	parent_names[2] = "plladivck";
 	parent_names[3] = "pllbck";
 	hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4,
-					   parent_names,
+					   parent_names, NULL,
 					   &at91sam9x5_master_layout,
 					   &mck_characteristics,
 					   &at91sam9n12_mck_lock);
@@ -191,7 +191,7 @@ static void __init at91sam9n12_pmc_setup(struct device_node *np)
 		goto err_free;
 
 	hw = at91_clk_register_master_div(regmap, "masterck_div",
-					  "masterck_pres",
+					  "masterck_pres", NULL,
 					  &at91sam9x5_master_layout,
 					  &mck_characteristics,
 					  &at91sam9n12_mck_lock,

drivers/clk/at91/at91sam9rl.c

@@ -120,7 +120,7 @@ static void __init at91sam9rl_pmc_setup(struct device_node *np)
 	parent_names[2] = "pllack";
 	parent_names[3] = "utmick";
 	hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4,
-					   parent_names,
+					   parent_names, NULL,
 					   &at91rm9200_master_layout,
 					   &sam9rl_mck_characteristics,
 					   &sam9rl_mck_lock);
@@ -128,7 +128,7 @@ static void __init at91sam9rl_pmc_setup(struct device_node *np)
 		goto err_free;
 
 	hw = at91_clk_register_master_div(regmap, "masterck_div",
-					  "masterck_pres",
+					  "masterck_pres", NULL,
 					  &at91rm9200_master_layout,
 					  &sam9rl_mck_characteristics,
 					  &sam9rl_mck_lock, CLK_SET_RATE_GATE, 0);

drivers/clk/at91/at91sam9x5.c

@@ -204,14 +204,14 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np,
 	parent_names[2] = "plladivck";
 	parent_names[3] = "utmick";
 	hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4,
-					   parent_names,
+					   parent_names, NULL,
 					   &at91sam9x5_master_layout,
 					   &mck_characteristics, &mck_lock);
 	if (IS_ERR(hw))
 		goto err_free;
 
 	hw = at91_clk_register_master_div(regmap, "masterck_div",
-					  "masterck_pres",
+					  "masterck_pres", NULL,
 					  &at91sam9x5_master_layout,
 					  &mck_characteristics, &mck_lock,
 					  CLK_SET_RATE_GATE, 0);

drivers/clk/at91/clk-master.c

@@ -473,18 +473,19 @@ static struct clk_hw * __init
 at91_clk_register_master_internal(struct regmap *regmap,
 		const char *name, int num_parents,
 		const char **parent_names,
+		struct clk_hw **parent_hws,
 		const struct clk_master_layout *layout,
 		const struct clk_master_characteristics *characteristics,
 		const struct clk_ops *ops, spinlock_t *lock, u32 flags)
 {
 	struct clk_master *master;
-	struct clk_init_data init;
+	struct clk_init_data init = {};
 	struct clk_hw *hw;
 	unsigned int mckr;
 	unsigned long irqflags;
 	int ret;
 
-	if (!name || !num_parents || !parent_names || !lock)
+	if (!name || !num_parents || !(parent_names || parent_hws) || !lock)
 		return ERR_PTR(-EINVAL);
 
 	master = kzalloc(sizeof(*master), GFP_KERNEL);
@@ -493,7 +494,10 @@ at91_clk_register_master_internal(struct regmap *regmap,
 
 	init.name = name;
 	init.ops = ops;
-	init.parent_names = parent_names;
+	if (parent_hws)
+		init.parent_hws = (const struct clk_hw **)parent_hws;
+	else
+		init.parent_names = parent_names;
 	init.num_parents = num_parents;
 	init.flags = flags;
 
@@ -527,12 +531,13 @@ struct clk_hw * __init
 at91_clk_register_master_pres(struct regmap *regmap,
 		const char *name, int num_parents,
 		const char **parent_names,
+		struct clk_hw **parent_hws,
 		const struct clk_master_layout *layout,
 		const struct clk_master_characteristics *characteristics,
 		spinlock_t *lock)
 {
 	return at91_clk_register_master_internal(regmap, name, num_parents,
-						 parent_names, layout,
+						 parent_names, parent_hws, layout,
 						 characteristics,
 						 &master_pres_ops,
 						 lock, CLK_SET_RATE_GATE);
@@ -541,7 +546,7 @@ at91_clk_register_master_pres(struct regmap *regmap,
 struct clk_hw * __init
 at91_clk_register_master_div(struct regmap *regmap,
 		const char *name, const char *parent_name,
-		const struct clk_master_layout *layout,
+		struct clk_hw *parent_hw, const struct clk_master_layout *layout,
 		const struct clk_master_characteristics *characteristics,
 		spinlock_t *lock, u32 flags, u32 safe_div)
 {
@@ -554,7 +559,8 @@ at91_clk_register_master_div(struct regmap *regmap,
 		ops = &master_div_ops_chg;
 
 	hw = at91_clk_register_master_internal(regmap, name, 1,
-					       &parent_name, layout,
+					       parent_name ? &parent_name : NULL,
+					       parent_hw ? &parent_hw : NULL, layout,
 					       characteristics, ops,
 					       lock, flags);
 
@@ -806,18 +812,19 @@ struct clk_hw * __init
 at91_clk_sama7g5_register_master(struct regmap *regmap,
 				 const char *name, int num_parents,
 				 const char **parent_names,
+				 struct clk_hw **parent_hws,
 				 u32 *mux_table,
 				 spinlock_t *lock, u8 id,
 				 bool critical, int chg_pid)
 {
 	struct clk_master *master;
 	struct clk_hw *hw;
-	struct clk_init_data init;
+	struct clk_init_data init = {};
 	unsigned long flags;
 	unsigned int val;
 	int ret;
 
-	if (!name || !num_parents || !parent_names || !mux_table ||
+	if (!name || !num_parents || !(parent_names || parent_hws) || !mux_table ||
 	    !lock || id > MASTER_MAX_ID)
 		return ERR_PTR(-EINVAL);
 
@@ -827,7 +834,10 @@ at91_clk_sama7g5_register_master(struct regmap *regmap,
 
 	init.name = name;
 	init.ops = &sama7g5_master_ops;
-	init.parent_names = parent_names;
+	if (parent_hws)
+		init.parent_hws = (const struct clk_hw **)parent_hws;
+	else
+		init.parent_names = parent_names;
 	init.num_parents = num_parents;
 	init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE;
 	if (chg_pid >= 0)

drivers/clk/at91/dt-compat.c

@@ -420,12 +420,12 @@ of_at91_clk_master_setup(struct device_node *np,
 		return;
 
 	hw = at91_clk_register_master_pres(regmap, "masterck_pres", num_parents,
-					   parent_names, layout,
+					   parent_names, NULL, layout,
 					   characteristics, &mck_lock);
 	if (IS_ERR(hw))
 		goto out_free_characteristics;
 
-	hw = at91_clk_register_master_div(regmap, name, "masterck_pres",
+	hw = at91_clk_register_master_div(regmap, name, "masterck_pres", NULL,
 					  layout, characteristics,
 					  &mck_lock, CLK_SET_RATE_GATE, 0);
 	if (IS_ERR(hw))

drivers/clk/at91/pmc.h

@@ -177,13 +177,14 @@ at91_clk_register_sam9x5_main(struct regmap *regmap, const char *name,
 struct clk_hw * __init
 at91_clk_register_master_pres(struct regmap *regmap, const char *name,
 			      int num_parents, const char **parent_names,
+			      struct clk_hw **parent_hws,
 			      const struct clk_master_layout *layout,
 			      const struct clk_master_characteristics *characteristics,
 			      spinlock_t *lock);
 
 struct clk_hw * __init
 at91_clk_register_master_div(struct regmap *regmap, const char *name,
-			     const char *parent_names,
+			     const char *parent_names, struct clk_hw *parent_hw,
 			     const struct clk_master_layout *layout,
 			     const struct clk_master_characteristics *characteristics,
 			     spinlock_t *lock, u32 flags, u32 safe_div);
@@ -191,7 +192,8 @@ at91_clk_register_master_div(struct regmap *regmap, const char *name,
 struct clk_hw * __init
 at91_clk_sama7g5_register_master(struct regmap *regmap,
 				 const char *name, int num_parents,
-				 const char **parent_names, u32 *mux_table,
+				 const char **parent_names,
+				 struct clk_hw **parent_hws, u32 *mux_table,
 				 spinlock_t *lock, u8 id, bool critical,
 				 int chg_pid);
 

drivers/clk/at91/sam9x60.c

@@ -280,13 +280,13 @@ static void __init sam9x60_pmc_setup(struct device_node *np)
 	parent_names[1] = "mainck";
 	parent_names[2] = "pllack_divck";
 	hw = at91_clk_register_master_pres(regmap, "masterck_pres", 3,
-					   parent_names, &sam9x60_master_layout,
+					   parent_names, NULL, &sam9x60_master_layout,
 					   &mck_characteristics, &mck_lock);
 	if (IS_ERR(hw))
 		goto err_free;
 
 	hw = at91_clk_register_master_div(regmap, "masterck_div",
-					  "masterck_pres", &sam9x60_master_layout,
+					  "masterck_pres", NULL, &sam9x60_master_layout,
 					  &mck_characteristics, &mck_lock,
 					  CLK_SET_RATE_GATE, 0);
 	if (IS_ERR(hw))

drivers/clk/at91/sama5d2.c

@@ -260,14 +260,14 @@ static void __init sama5d2_pmc_setup(struct device_node *np)
 	parent_names[2] = "plladivck";
 	parent_names[3] = "utmick";
 	hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4,
-					   parent_names,
+					   parent_names, NULL,
 					   &at91sam9x5_master_layout,
 					   &mck_characteristics, &mck_lock);
 	if (IS_ERR(hw))
 		goto err_free;
 
 	hw = at91_clk_register_master_div(regmap, "masterck_div",
-					  "masterck_pres",
+					  "masterck_pres", NULL,
 					  &at91sam9x5_master_layout,
 					  &mck_characteristics, &mck_lock,
 					  CLK_SET_RATE_GATE, 0);

drivers/clk/at91/sama5d3.c

@@ -183,14 +183,14 @@ static void __init sama5d3_pmc_setup(struct device_node *np)
 	parent_names[2] = "plladivck";
 	parent_names[3] = "utmick";
 	hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4,
-					   parent_names,
+					   parent_names, NULL,
 					   &at91sam9x5_master_layout,
 					   &mck_characteristics, &mck_lock);
 	if (IS_ERR(hw))
 		goto err_free;
 
 	hw = at91_clk_register_master_div(regmap, "masterck_div",
-					  "masterck_pres",
+					  "masterck_pres", NULL,
 					  &at91sam9x5_master_layout,
 					  &mck_characteristics, &mck_lock,
 					  CLK_SET_RATE_GATE, 0);

drivers/clk/at91/sama5d4.c

@@ -198,14 +198,14 @@ static void __init sama5d4_pmc_setup(struct device_node *np)
 	parent_names[2] = "plladivck";
 	parent_names[3] = "utmick";
 	hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4,
-					   parent_names,
+					   parent_names, NULL,
 					   &at91sam9x5_master_layout,
 					   &mck_characteristics, &mck_lock);
 	if (IS_ERR(hw))
 		goto err_free;
 
 	hw = at91_clk_register_master_div(regmap, "masterck_div",
-					  "masterck_pres",
+					  "masterck_pres", NULL,
 					  &at91sam9x5_master_layout,
 					  &mck_characteristics, &mck_lock,
 					  CLK_SET_RATE_GATE, 0);

drivers/clk/at91/sama7g5.c

@@ -995,7 +995,7 @@ static void __init sama7g5_pmc_setup(struct device_node *np)
 	}
 
 	parent_names[0] = "cpupll_divpmcck";
-	hw = at91_clk_register_master_div(regmap, "mck0", "cpupll_divpmcck",
+	hw = at91_clk_register_master_div(regmap, "mck0", "cpupll_divpmcck", NULL,
 					  &mck0_layout, &mck0_characteristics,
 					  &pmc_mck0_lock, CLK_GET_RATE_NOCACHE, 5);
 	if (IS_ERR(hw))
@@ -1022,7 +1022,7 @@ static void __init sama7g5_pmc_setup(struct device_node *np)
 				   sama7g5_mckx[i].ep_count);
 
 		hw = at91_clk_sama7g5_register_master(regmap, sama7g5_mckx[i].n,
-				   num_parents, parent_names, mux_table,
+				   num_parents, parent_names, NULL, mux_table,
 				   &pmc_mckX_lock, sama7g5_mckx[i].id,
 				   sama7g5_mckx[i].c,
 				   sama7g5_mckx[i].ep_chg_id);