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

Add support for parent_hw in system 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-system 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/20230615093227.576102-7-claudiu.beznea@microchip.com

14 files changed, 24 insertions, 19 deletions

diff --git a/drivers/clk/at91/at91rm9200.c b/drivers/clk/at91/at91rm9200.c
index 2dd69628b7ba..3f19e737ae4d 100644
--- a/drivers/clk/at91/at91rm9200.c
+++ b/drivers/clk/at91/at91rm9200.c
@@ -182,7 +182,7 @@ static void __init at91rm9200_pmc_setup(struct device_node *np)
 
 	for (i = 0; i < ARRAY_SIZE(at91rm9200_systemck); i++) {
 		hw = at91_clk_register_system(regmap, at91rm9200_systemck[i].n,
-					      at91rm9200_systemck[i].p,
+					      at91rm9200_systemck[i].p, NULL,
 					      at91rm9200_systemck[i].id, 0);
 		if (IS_ERR(hw))
 			goto err_free;
diff --git a/drivers/clk/at91/at91sam9260.c b/drivers/clk/at91/at91sam9260.c
index 7d292d0c2bfc..0799a13060ea 100644
--- a/drivers/clk/at91/at91sam9260.c
+++ b/drivers/clk/at91/at91sam9260.c
@@ -459,7 +459,7 @@ static void __init at91sam926x_pmc_setup(struct device_node *np,
 
 	for (i = 0; i < data->num_sck; i++) {
 		hw = at91_clk_register_system(regmap, data->sck[i].n,
-					      data->sck[i].p,
+					      data->sck[i].p, NULL,
 					      data->sck[i].id, 0);
 		if (IS_ERR(hw))
 			goto err_free;
diff --git a/drivers/clk/at91/at91sam9g45.c b/drivers/clk/at91/at91sam9g45.c
index b49415952510..ec2f26c3a80a 100644
--- a/drivers/clk/at91/at91sam9g45.c
+++ b/drivers/clk/at91/at91sam9g45.c
@@ -202,7 +202,7 @@ static void __init at91sam9g45_pmc_setup(struct device_node *np)
 
 	for (i = 0; i < ARRAY_SIZE(at91sam9g45_systemck); i++) {
 		hw = at91_clk_register_system(regmap, at91sam9g45_systemck[i].n,
-					      at91sam9g45_systemck[i].p,
+					      at91sam9g45_systemck[i].p, NULL,
 					      at91sam9g45_systemck[i].id,
 					      at91sam9g45_systemck[i].flags);
 		if (IS_ERR(hw))
diff --git a/drivers/clk/at91/at91sam9n12.c b/drivers/clk/at91/at91sam9n12.c
index 63151cd0d3b2..751786184ae2 100644
--- a/drivers/clk/at91/at91sam9n12.c
+++ b/drivers/clk/at91/at91sam9n12.c
@@ -227,7 +227,7 @@ static void __init at91sam9n12_pmc_setup(struct device_node *np)
 
 	for (i = 0; i < ARRAY_SIZE(at91sam9n12_systemck); i++) {
 		hw = at91_clk_register_system(regmap, at91sam9n12_systemck[i].n,
-					      at91sam9n12_systemck[i].p,
+					      at91sam9n12_systemck[i].p, NULL,
 					      at91sam9n12_systemck[i].id,
 					      at91sam9n12_systemck[i].flags);
 		if (IS_ERR(hw))
diff --git a/drivers/clk/at91/at91sam9rl.c b/drivers/clk/at91/at91sam9rl.c
index 858987757b87..051b2eeb9276 100644
--- a/drivers/clk/at91/at91sam9rl.c
+++ b/drivers/clk/at91/at91sam9rl.c
@@ -159,7 +159,7 @@ static void __init at91sam9rl_pmc_setup(struct device_node *np)
 
 	for (i = 0; i < ARRAY_SIZE(at91sam9rl_systemck); i++) {
 		hw = at91_clk_register_system(regmap, at91sam9rl_systemck[i].n,
-					      at91sam9rl_systemck[i].p,
+					      at91sam9rl_systemck[i].p, NULL,
 					      at91sam9rl_systemck[i].id, 0);
 		if (IS_ERR(hw))
 			goto err_free;
diff --git a/drivers/clk/at91/at91sam9x5.c b/drivers/clk/at91/at91sam9x5.c
index 6a971b34f7dd..e1be2c4c54be 100644
--- a/drivers/clk/at91/at91sam9x5.c
+++ b/drivers/clk/at91/at91sam9x5.c
@@ -252,7 +252,7 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np,
 
 	for (i = 0; i < ARRAY_SIZE(at91sam9x5_systemck); i++) {
 		hw = at91_clk_register_system(regmap, at91sam9x5_systemck[i].n,
-					      at91sam9x5_systemck[i].p,
+					      at91sam9x5_systemck[i].p, NULL,
 					      at91sam9x5_systemck[i].id,
 					      at91sam9x5_systemck[i].flags);
 		if (IS_ERR(hw))
@@ -263,7 +263,7 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np,
 
 	if (has_lcdck) {
 		hw = at91_clk_register_system(regmap, "lcdck", "masterck_div",
-					      3, 0);
+					      NULL, 3, 0);
 		if (IS_ERR(hw))
 			goto err_free;
 
diff --git a/drivers/clk/at91/clk-system.c b/drivers/clk/at91/clk-system.c
index 10193650429e..90eed39d0785 100644
--- a/drivers/clk/at91/clk-system.c
+++ b/drivers/clk/at91/clk-system.c
@@ -105,14 +105,15 @@ static const struct clk_ops system_ops = {
 
 struct clk_hw * __init
 at91_clk_register_system(struct regmap *regmap, const char *name,
-			 const char *parent_name, u8 id, unsigned long flags)
+			 const char *parent_name, struct clk_hw *parent_hw, u8 id,
+			 unsigned long flags)
 {
 	struct clk_system *sys;
 	struct clk_hw *hw;
-	struct clk_init_data init;
+	struct clk_init_data init = {};
 	int ret;
 
-	if (!parent_name || id > SYSTEM_MAX_ID)
+	if (!(parent_name || parent_hw) || id > SYSTEM_MAX_ID)
 		return ERR_PTR(-EINVAL);
 
 	sys = kzalloc(sizeof(*sys), GFP_KERNEL);
@@ -121,7 +122,10 @@ at91_clk_register_system(struct regmap *regmap, const char *name,
 
 	init.name = name;
 	init.ops = &system_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 = CLK_SET_RATE_PARENT | flags;
 
diff --git a/drivers/clk/at91/dt-compat.c b/drivers/clk/at91/dt-compat.c
index 96ce2287e13a..e5fcf2e0d235 100644
--- a/drivers/clk/at91/dt-compat.c
+++ b/drivers/clk/at91/dt-compat.c
@@ -908,8 +908,8 @@ static void __init of_at91rm9200_clk_sys_setup(struct device_node *np)
 		if (!strcmp(sysclknp->name, "ddrck"))
 			flags = CLK_IS_CRITICAL;
 
-		hw = at91_clk_register_system(regmap, name, parent_name, id,
-					      flags);
+		hw = at91_clk_register_system(regmap, name, parent_name, NULL,
+					      id, flags);
 		if (IS_ERR(hw))
 			continue;
 
diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h
index 658bbf574af9..101e005a9550 100644
--- a/drivers/clk/at91/pmc.h
+++ b/drivers/clk/at91/pmc.h
@@ -251,7 +251,8 @@ at91sam9x5_clk_register_smd(struct regmap *regmap, const char *name,
 
 struct clk_hw * __init
 at91_clk_register_system(struct regmap *regmap, const char *name,
-			 const char *parent_name, u8 id, unsigned long flags);
+			 const char *parent_name, struct clk_hw *parent_hw,
+			 u8 id, unsigned long flags);
 
 struct clk_hw * __init
 at91sam9x5_clk_register_usb(struct regmap *regmap, const char *name,
diff --git a/drivers/clk/at91/sam9x60.c b/drivers/clk/at91/sam9x60.c
index 369123dc009c..505827013b46 100644
--- a/drivers/clk/at91/sam9x60.c
+++ b/drivers/clk/at91/sam9x60.c
@@ -324,7 +324,7 @@ static void __init sam9x60_pmc_setup(struct device_node *np)
 
 	for (i = 0; i < ARRAY_SIZE(sam9x60_systemck); i++) {
 		hw = at91_clk_register_system(regmap, sam9x60_systemck[i].n,
-					      sam9x60_systemck[i].p,
+					      sam9x60_systemck[i].p, NULL,
 					      sam9x60_systemck[i].id,
 					      sam9x60_systemck[i].flags);
 		if (IS_ERR(hw))
diff --git a/drivers/clk/at91/sama5d2.c b/drivers/clk/at91/sama5d2.c
index 8eda5f95d142..c5df06190e1c 100644
--- a/drivers/clk/at91/sama5d2.c
+++ b/drivers/clk/at91/sama5d2.c
@@ -311,7 +311,7 @@ static void __init sama5d2_pmc_setup(struct device_node *np)
 
 	for (i = 0; i < ARRAY_SIZE(sama5d2_systemck); i++) {
 		hw = at91_clk_register_system(regmap, sama5d2_systemck[i].n,
-					      sama5d2_systemck[i].p,
+					      sama5d2_systemck[i].p, NULL,
 					      sama5d2_systemck[i].id,
 					      sama5d2_systemck[i].flags);
 		if (IS_ERR(hw))
diff --git a/drivers/clk/at91/sama5d3.c b/drivers/clk/at91/sama5d3.c
index 68a540cf8eda..15fa180a3f58 100644
--- a/drivers/clk/at91/sama5d3.c
+++ b/drivers/clk/at91/sama5d3.c
@@ -231,7 +231,7 @@ static void __init sama5d3_pmc_setup(struct device_node *np)
 
 	for (i = 0; i < ARRAY_SIZE(sama5d3_systemck); i++) {
 		hw = at91_clk_register_system(regmap, sama5d3_systemck[i].n,
-					      sama5d3_systemck[i].p,
+					      sama5d3_systemck[i].p, NULL,
 					      sama5d3_systemck[i].id,
 					      sama5d3_systemck[i].flags);
 		if (IS_ERR(hw))
diff --git a/drivers/clk/at91/sama5d4.c b/drivers/clk/at91/sama5d4.c
index 9145fa184388..2440a34d1d67 100644
--- a/drivers/clk/at91/sama5d4.c
+++ b/drivers/clk/at91/sama5d4.c
@@ -254,7 +254,7 @@ static void __init sama5d4_pmc_setup(struct device_node *np)
 
 	for (i = 0; i < ARRAY_SIZE(sama5d4_systemck); i++) {
 		hw = at91_clk_register_system(regmap, sama5d4_systemck[i].n,
-					      sama5d4_systemck[i].p,
+					      sama5d4_systemck[i].p, NULL,
 					      sama5d4_systemck[i].id,
 					      sama5d4_systemck[i].flags);
 		if (IS_ERR(hw))
diff --git a/drivers/clk/at91/sama7g5.c b/drivers/clk/at91/sama7g5.c
index 22942af8dce4..b606d642a22b 100644
--- a/drivers/clk/at91/sama7g5.c
+++ b/drivers/clk/at91/sama7g5.c
@@ -1067,7 +1067,7 @@ static void __init sama7g5_pmc_setup(struct device_node *np)
 
 	for (i = 0; i < ARRAY_SIZE(sama7g5_systemck); i++) {
 		hw = at91_clk_register_system(regmap, sama7g5_systemck[i].n,
-					      sama7g5_systemck[i].p,
+					      sama7g5_systemck[i].p, NULL,
 					      sama7g5_systemck[i].id, 0);
 		if (IS_ERR(hw))
 			goto err_free;