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

Add support for parent_hw in peripheral 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-peripheral 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/20230615093227.576102-5-claudiu.beznea@microchip.com

drivers/clk/at91/at91rm9200.c

@@ -193,7 +193,7 @@ static void __init at91rm9200_pmc_setup(struct device_node *np)
 	for (i = 0; i < ARRAY_SIZE(at91rm9200_periphck); i++) {
 		hw = at91_clk_register_peripheral(regmap,
 						  at91rm9200_periphck[i].n,
-						  "masterck_div",
+						  "masterck_div", NULL,
 						  at91rm9200_periphck[i].id);
 		if (IS_ERR(hw))
 			goto err_free;

drivers/clk/at91/at91sam9260.c

@@ -470,7 +470,7 @@ static void __init at91sam926x_pmc_setup(struct device_node *np,
 	for (i = 0; i < data->num_pck; i++) {
 		hw = at91_clk_register_peripheral(regmap,
 						  data->pck[i].n,
-						  "masterck_div",
+						  "masterck_div", NULL,
 						  data->pck[i].id);
 		if (IS_ERR(hw))
 			goto err_free;

drivers/clk/at91/at91sam9g45.c

@@ -214,7 +214,7 @@ static void __init at91sam9g45_pmc_setup(struct device_node *np)
 	for (i = 0; i < ARRAY_SIZE(at91sam9g45_periphck); i++) {
 		hw = at91_clk_register_peripheral(regmap,
 						  at91sam9g45_periphck[i].n,
-						  "masterck_div",
+						  "masterck_div", NULL,
 						  at91sam9g45_periphck[i].id);
 		if (IS_ERR(hw))
 			goto err_free;

drivers/clk/at91/at91sam9n12.c

@@ -240,7 +240,7 @@ static void __init at91sam9n12_pmc_setup(struct device_node *np)
 		hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
 							 &at91sam9n12_pcr_layout,
 							 at91sam9n12_periphck[i].n,
-							 "masterck_div",
+							 "masterck_div", NULL,
 							 at91sam9n12_periphck[i].id,
 							 &range, INT_MIN, 0);
 		if (IS_ERR(hw))

drivers/clk/at91/at91sam9rl.c

@@ -170,7 +170,7 @@ static void __init at91sam9rl_pmc_setup(struct device_node *np)
 	for (i = 0; i < ARRAY_SIZE(at91sam9rl_periphck); i++) {
 		hw = at91_clk_register_peripheral(regmap,
 						  at91sam9rl_periphck[i].n,
-						  "masterck_div",
+						  "masterck_div", NULL,
 						  at91sam9rl_periphck[i].id);
 		if (IS_ERR(hw))
 			goto err_free;

drivers/clk/at91/at91sam9x5.c

@@ -274,7 +274,7 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np,
 		hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
 							 &at91sam9x5_pcr_layout,
 							 at91sam9x5_periphck[i].n,
-							 "masterck_div",
+							 "masterck_div", NULL,
 							 at91sam9x5_periphck[i].id,
 							 &range, INT_MIN, 0);
 		if (IS_ERR(hw))
@@ -287,7 +287,7 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np,
 		hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
 							 &at91sam9x5_pcr_layout,
 							 extra_pcks[i].n,
-							 "masterck_div",
+							 "masterck_div", NULL,
 							 extra_pcks[i].id,
 							 &range, INT_MIN, 0);
 		if (IS_ERR(hw))

drivers/clk/at91/clk-peripheral.c

@@ -97,14 +97,15 @@ static const struct clk_ops peripheral_ops = {
 
 struct clk_hw * __init
 at91_clk_register_peripheral(struct regmap *regmap, const char *name,
-			     const char *parent_name, u32 id)
+			     const char *parent_name, struct clk_hw *parent_hw,
+			     u32 id)
 {
 	struct clk_peripheral *periph;
-	struct clk_init_data init;
+	struct clk_init_data init = {};
 	struct clk_hw *hw;
 	int ret;
 
-	if (!name || !parent_name || id > PERIPHERAL_ID_MAX)
+	if (!name || !(parent_name || parent_hw) || id > PERIPHERAL_ID_MAX)
 		return ERR_PTR(-EINVAL);
 
 	periph = kzalloc(sizeof(*periph), GFP_KERNEL);
@@ -113,7 +114,10 @@ at91_clk_register_peripheral(struct regmap *regmap, const char *name,
 
 	init.name = name;
 	init.ops = &peripheral_ops;
-	init.parent_names = &parent_name;
+	if (parent_hw)
+		init.parent_hws = (const struct clk_hw **)&parent_hw;
+	else
+		init.parent_names = &parent_name;
 	init.num_parents = 1;
 	init.flags = 0;
 
@@ -444,15 +448,16 @@ struct clk_hw * __init
 at91_clk_register_sam9x5_peripheral(struct regmap *regmap, spinlock_t *lock,
 				    const struct clk_pcr_layout *layout,
 				    const char *name, const char *parent_name,
+				    struct clk_hw *parent_hw,
 				    u32 id, const struct clk_range *range,
 				    int chg_pid, unsigned long flags)
 {
 	struct clk_sam9x5_peripheral *periph;
-	struct clk_init_data init;
+	struct clk_init_data init = {};
 	struct clk_hw *hw;
 	int ret;
 
-	if (!name || !parent_name)
+	if (!name || !(parent_name || parent_hw))
 		return ERR_PTR(-EINVAL);
 
 	periph = kzalloc(sizeof(*periph), GFP_KERNEL);
@@ -460,7 +465,10 @@ at91_clk_register_sam9x5_peripheral(struct regmap *regmap, spinlock_t *lock,
 		return ERR_PTR(-ENOMEM);
 
 	init.name = name;
-	init.parent_names = &parent_name;
+	if (parent_hw)
+		init.parent_hws = (const struct clk_hw **)&parent_hw;
+	else
+		init.parent_names = &parent_name;
 	init.num_parents = 1;
 	init.flags = flags;
 	if (chg_pid < 0) {

drivers/clk/at91/dt-compat.c

@@ -490,7 +490,7 @@ of_at91_clk_periph_setup(struct device_node *np, u8 type)
 
 		if (type == PERIPHERAL_AT91RM9200) {
 			hw = at91_clk_register_peripheral(regmap, name,
-							  parent_name, id);
+							  parent_name, NULL, id);
 		} else {
 			struct clk_range range = CLK_RANGE(0, 0);
 			unsigned long flags = 0;
@@ -512,6 +512,7 @@ of_at91_clk_periph_setup(struct device_node *np, u8 type)
 								 &dt_pcr_layout,
 								 name,
 								 parent_name,
+								 NULL,
 								 id, &range,
 								 INT_MIN,
 								 flags);

drivers/clk/at91/pmc.h

@@ -199,11 +199,13 @@ at91_clk_sama7g5_register_master(struct regmap *regmap,
 
 struct clk_hw * __init
 at91_clk_register_peripheral(struct regmap *regmap, const char *name,
-			     const char *parent_name, u32 id);
+			     const char *parent_name, struct clk_hw *parent_hw,
+			     u32 id);
 struct clk_hw * __init
 at91_clk_register_sam9x5_peripheral(struct regmap *regmap, spinlock_t *lock,
 				    const struct clk_pcr_layout *layout,
 				    const char *name, const char *parent_name,
+				    struct clk_hw *parent_hw,
 				    u32 id, const struct clk_range *range,
 				    int chg_pid, unsigned long flags);
 

drivers/clk/at91/sam9x60.c

@@ -337,7 +337,7 @@ static void __init sam9x60_pmc_setup(struct device_node *np)
 		hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
 							 &sam9x60_pcr_layout,
 							 sam9x60_periphck[i].n,
-							 "masterck_div",
+							 "masterck_div", NULL,
 							 sam9x60_periphck[i].id,
 							 &range, INT_MIN,
 							 sam9x60_periphck[i].flags);

drivers/clk/at91/sama5d2.c

@@ -324,7 +324,7 @@ static void __init sama5d2_pmc_setup(struct device_node *np)
 		hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
 							 &sama5d2_pcr_layout,
 							 sama5d2_periphck[i].n,
-							 "masterck_div",
+							 "masterck_div", NULL,
 							 sama5d2_periphck[i].id,
 							 &range, INT_MIN,
 							 sama5d2_periphck[i].flags);
@@ -338,7 +338,7 @@ static void __init sama5d2_pmc_setup(struct device_node *np)
 		hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
 							 &sama5d2_pcr_layout,
 							 sama5d2_periph32ck[i].n,
-							 "h32mxck",
+							 "h32mxck", NULL,
 							 sama5d2_periph32ck[i].id,
 							 &sama5d2_periph32ck[i].r,
 							 INT_MIN, 0);

drivers/clk/at91/sama5d3.c

@@ -244,7 +244,7 @@ static void __init sama5d3_pmc_setup(struct device_node *np)
 		hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
 							 &sama5d3_pcr_layout,
 							 sama5d3_periphck[i].n,
-							 "masterck_div",
+							 "masterck_div", NULL,
 							 sama5d3_periphck[i].id,
 							 &sama5d3_periphck[i].r,
 							 INT_MIN,

drivers/clk/at91/sama5d4.c

@@ -267,7 +267,7 @@ static void __init sama5d4_pmc_setup(struct device_node *np)
 		hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
 							 &sama5d4_pcr_layout,
 							 sama5d4_periphck[i].n,
-							 "masterck_div",
+							 "masterck_div", NULL,
 							 sama5d4_periphck[i].id,
 							 &range, INT_MIN,
 							 sama5d4_periphck[i].flags);
@@ -281,7 +281,7 @@ static void __init sama5d4_pmc_setup(struct device_node *np)
 		hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
 							 &sama5d4_pcr_layout,
 							 sama5d4_periph32ck[i].n,
-							 "h32mxck",
+							 "h32mxck", NULL,
 							 sama5d4_periph32ck[i].id,
 							 &range, INT_MIN, 0);
 		if (IS_ERR(hw))

drivers/clk/at91/sama7g5.c

@@ -1079,7 +1079,7 @@ static void __init sama7g5_pmc_setup(struct device_node *np)
 		hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
 						&sama7g5_pcr_layout,
 						sama7g5_periphck[i].n,
-						sama7g5_periphck[i].p,
+						sama7g5_periphck[i].p, NULL,
 						sama7g5_periphck[i].id,
 						&sama7g5_periphck[i].r,
 						sama7g5_periphck[i].chgp ? 0 :