clk: at91: sckc: switch to parent_data/parent_hw

Switch slow clock drivers to use parent_data and parent_hw.
With this parent-child relation is described with pointers rather
than strings.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20230615093227.576102-10-claudiu.beznea@microchip.com

Author: claudiubeznea

drivers/clk/at91/sckc.c

@@ -117,17 +117,17 @@ static const struct clk_ops slow_osc_ops = {
 static struct clk_hw * __init
 at91_clk_register_slow_osc(void __iomem *sckcr,
 			   const char *name,
-			   const char *parent_name,
+			   const struct clk_parent_data *parent_data,
 			   unsigned long startup,
 			   bool bypass,
 			   const struct clk_slow_bits *bits)
 {
 	struct clk_slow_osc *osc;
 	struct clk_hw *hw;
-	struct clk_init_data init;
+	struct clk_init_data init = {};
 	int ret;
 
-	if (!sckcr || !name || !parent_name)
+	if (!sckcr || !name || !parent_data)
 		return ERR_PTR(-EINVAL);
 
 	osc = kzalloc(sizeof(*osc), GFP_KERNEL);
@@ -136,7 +136,7 @@ at91_clk_register_slow_osc(void __iomem *sckcr,
 
 	init.name = name;
 	init.ops = &slow_osc_ops;
-	init.parent_names = &parent_name;
+	init.parent_data = parent_data;
 	init.num_parents = 1;
 	init.flags = CLK_IGNORE_UNUSED;
 
@@ -317,16 +317,16 @@ static const struct clk_ops sam9x5_slow_ops = {
 static struct clk_hw * __init
 at91_clk_register_sam9x5_slow(void __iomem *sckcr,
 			      const char *name,
-			      const char **parent_names,
+			      const struct clk_hw **parent_hws,
 			      int num_parents,
 			      const struct clk_slow_bits *bits)
 {
 	struct clk_sam9x5_slow *slowck;
 	struct clk_hw *hw;
-	struct clk_init_data init;
+	struct clk_init_data init = {};
 	int ret;
 
-	if (!sckcr || !name || !parent_names || !num_parents)
+	if (!sckcr || !name || !parent_hws || !num_parents)
 		return ERR_PTR(-EINVAL);
 
 	slowck = kzalloc(sizeof(*slowck), GFP_KERNEL);
@@ -335,7 +335,7 @@ at91_clk_register_sam9x5_slow(void __iomem *sckcr,
 
 	init.name = name;
 	init.ops = &sam9x5_slow_ops;
-	init.parent_names = parent_names;
+	init.parent_hws = parent_hws;
 	init.num_parents = num_parents;
 	init.flags = 0;
 
@@ -366,18 +366,21 @@ static void __init at91sam9x5_sckc_register(struct device_node *np,
 					    unsigned int rc_osc_startup_us,
 					    const struct clk_slow_bits *bits)
 {
-	const char *parent_names[2] = { "slow_rc_osc", "slow_osc" };
 	void __iomem *regbase = of_iomap(np, 0);
 	struct device_node *child = NULL;
 	const char *xtal_name;
 	struct clk_hw *slow_rc, *slow_osc, *slowck;
+	static struct clk_parent_data parent_data = {
+		.name = "slow_xtal",
+	};
+	const struct clk_hw *parent_hws[2];
 	bool bypass;
 	int ret;
 
 	if (!regbase)
 		return;
 
-	slow_rc = at91_clk_register_slow_rc_osc(regbase, parent_names[0],
+	slow_rc = at91_clk_register_slow_rc_osc(regbase, "slow_rc_osc",
 						32768, 50000000,
 						rc_osc_startup_us, bits);
 	if (IS_ERR(slow_rc))
@@ -401,12 +404,16 @@ static void __init at91sam9x5_sckc_register(struct device_node *np,
 	if (!xtal_name)
 		goto unregister_slow_rc;
 
-	slow_osc = at91_clk_register_slow_osc(regbase, parent_names[1],
-					      xtal_name, 1200000, bypass, bits);
+	parent_data.fw_name = xtal_name;
+
+	slow_osc = at91_clk_register_slow_osc(regbase, "slow_osc",
+					      &parent_data, 1200000, bypass, bits);
 	if (IS_ERR(slow_osc))
 		goto unregister_slow_rc;
 
-	slowck = at91_clk_register_sam9x5_slow(regbase, "slowck", parent_names,
+	parent_hws[0] = slow_rc;
+	parent_hws[1] = slow_osc;
+	slowck = at91_clk_register_sam9x5_slow(regbase, "slowck", parent_hws,
 					       2, bits);
 	if (IS_ERR(slowck))
 		goto unregister_slow_osc;
@@ -464,14 +471,17 @@ static void __init of_sam9x60_sckc_setup(struct device_node *np)
 	struct clk_hw_onecell_data *clk_data;
 	struct clk_hw *slow_rc, *slow_osc;
 	const char *xtal_name;
-	const char *parent_names[2] = { "slow_rc_osc", "slow_osc" };
+	const struct clk_hw *parent_hws[2];
+	static struct clk_parent_data parent_data = {
+		.name = "slow_xtal",
+	};
 	bool bypass;
 	int ret;
 
 	if (!regbase)
 		return;
 
-	slow_rc = clk_hw_register_fixed_rate_with_accuracy(NULL, parent_names[0],
+	slow_rc = clk_hw_register_fixed_rate_with_accuracy(NULL, "slow_rc_osc",
 							   NULL, 0, 32768,
 							   93750000);
 	if (IS_ERR(slow_rc))
@@ -481,9 +491,10 @@ static void __init of_sam9x60_sckc_setup(struct device_node *np)
 	if (!xtal_name)
 		goto unregister_slow_rc;
 
+	parent_data.fw_name = xtal_name;
 	bypass = of_property_read_bool(np, "atmel,osc-bypass");
-	slow_osc = at91_clk_register_slow_osc(regbase, parent_names[1],
-					      xtal_name, 5000000, bypass,
+	slow_osc = at91_clk_register_slow_osc(regbase, "slow_osc",
+					      &parent_data, 5000000, bypass,
 					      &at91sam9x60_bits);
 	if (IS_ERR(slow_osc))
 		goto unregister_slow_rc;
@@ -494,14 +505,16 @@ static void __init of_sam9x60_sckc_setup(struct device_node *np)
 
 	/* MD_SLCK and TD_SLCK. */
 	clk_data->num = 2;
-	clk_data->hws[0] = clk_hw_register_fixed_rate(NULL, "md_slck",
-						      parent_names[0],
-						      0, 32768);
+	clk_data->hws[0] = clk_hw_register_fixed_rate_parent_hw(NULL, "md_slck",
+								slow_rc,
+								0, 32768);
 	if (IS_ERR(clk_data->hws[0]))
 		goto clk_data_free;
 
+	parent_hws[0] = slow_rc;
+	parent_hws[1] = slow_osc;
 	clk_data->hws[1] = at91_clk_register_sam9x5_slow(regbase, "td_slck",
-							 parent_names, 2,
+							 parent_hws, 2,
 							 &at91sam9x60_bits);
 	if (IS_ERR(clk_data->hws[1]))
 		goto unregister_md_slck;
@@ -572,30 +585,36 @@ static void __init of_sama5d4_sckc_setup(struct device_node *np)
 	void __iomem *regbase = of_iomap(np, 0);
 	struct clk_hw *slow_rc, *slowck;
 	struct clk_sama5d4_slow_osc *osc;
-	struct clk_init_data init;
+	struct clk_init_data init = {};
 	const char *xtal_name;
-	const char *parent_names[2] = { "slow_rc_osc", "slow_osc" };
+	const struct clk_hw *parent_hws[2];
+	static struct clk_parent_data parent_data = {
+		.name = "slow_xtal",
+	};
 	int ret;
 
 	if (!regbase)
 		return;
 
 	slow_rc = clk_hw_register_fixed_rate_with_accuracy(NULL,
-							   parent_names[0],
+							   "slow_rc_osc",
 							   NULL, 0, 32768,
 							   250000000);
 	if (IS_ERR(slow_rc))
 		return;
 
 	xtal_name = of_clk_get_parent_name(np, 0);
+	if (!xtal_name)
+		goto unregister_slow_rc;
+	parent_data.fw_name = xtal_name;
 
 	osc = kzalloc(sizeof(*osc), GFP_KERNEL);
 	if (!osc)
 		goto unregister_slow_rc;
 
-	init.name = parent_names[1];
+	init.name = "slow_osc";
 	init.ops = &sama5d4_slow_osc_ops;
-	init.parent_names = &xtal_name;
+	init.parent_data = &parent_data;
 	init.num_parents = 1;
 	init.flags = CLK_IGNORE_UNUSED;
 
@@ -608,8 +627,10 @@ static void __init of_sama5d4_sckc_setup(struct device_node *np)
 	if (ret)
 		goto free_slow_osc_data;
 
+	parent_hws[0] = slow_rc;
+	parent_hws[1] = &osc->hw;
 	slowck = at91_clk_register_sam9x5_slow(regbase, "slowck",
-					       parent_names, 2,
+					       parent_hws, 2,
 					       &at91sama5d4_bits);
 	if (IS_ERR(slowck))
 		goto unregister_slow_osc;