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

Add support for parent_hw in programmable clock driver.
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-programmable 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/20230615093227.576102-6-claudiu.beznea@microchip.com

Author: claudiubeznea

drivers/clk/at91/at91rm9200.c

@@ -171,7 +171,7 @@ static void __init at91rm9200_pmc_setup(struct device_node *np)
 		snprintf(name, sizeof(name), "prog%d", i);
 
 		hw = at91_clk_register_programmable(regmap, name,
-						    parent_names, 4, i,
+						    parent_names, NULL, 4, i,
 						    &at91rm9200_programmable_layout,
 						    NULL);
 		if (IS_ERR(hw))

drivers/clk/at91/at91sam9260.c

@@ -448,7 +448,7 @@ static void __init at91sam926x_pmc_setup(struct device_node *np,
 		snprintf(name, sizeof(name), "prog%d", i);
 
 		hw = at91_clk_register_programmable(regmap, name,
-						    parent_names, 4, i,
+						    parent_names, NULL, 4, i,
 						    &at91rm9200_programmable_layout,
 						    NULL);
 		if (IS_ERR(hw))

drivers/clk/at91/at91sam9g45.c

@@ -191,7 +191,7 @@ static void __init at91sam9g45_pmc_setup(struct device_node *np)
 		snprintf(name, sizeof(name), "prog%d", i);
 
 		hw = at91_clk_register_programmable(regmap, name,
-						    parent_names, 5, i,
+						    parent_names, NULL, 5, i,
 						    &at91sam9g45_programmable_layout,
 						    NULL);
 		if (IS_ERR(hw))

drivers/clk/at91/at91sam9n12.c

@@ -216,7 +216,7 @@ static void __init at91sam9n12_pmc_setup(struct device_node *np)
 		snprintf(name, sizeof(name), "prog%d", i);
 
 		hw = at91_clk_register_programmable(regmap, name,
-						    parent_names, 5, i,
+						    parent_names, NULL, 5, i,
 						    &at91sam9x5_programmable_layout,
 						    NULL);
 		if (IS_ERR(hw))

drivers/clk/at91/at91sam9rl.c

@@ -148,7 +148,7 @@ static void __init at91sam9rl_pmc_setup(struct device_node *np)
 		snprintf(name, sizeof(name), "prog%d", i);
 
 		hw = at91_clk_register_programmable(regmap, name,
-						    parent_names, 5, i,
+						    parent_names, NULL, 5, i,
 						    &at91rm9200_programmable_layout,
 						    NULL);
 		if (IS_ERR(hw))

drivers/clk/at91/at91sam9x5.c

@@ -241,7 +241,7 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np,
 		snprintf(name, sizeof(name), "prog%d", i);
 
 		hw = at91_clk_register_programmable(regmap, name,
-						    parent_names, 5, i,
+						    parent_names, NULL, 5, i,
 						    &at91sam9x5_programmable_layout,
 						    NULL);
 		if (IS_ERR(hw))

drivers/clk/at91/clk-programmable.c

@@ -215,16 +215,16 @@ static const struct clk_ops programmable_ops = {
 struct clk_hw * __init
 at91_clk_register_programmable(struct regmap *regmap,
 			       const char *name, const char **parent_names,
-			       u8 num_parents, u8 id,
+			       struct clk_hw **parent_hws, u8 num_parents, u8 id,
 			       const struct clk_programmable_layout *layout,
 			       u32 *mux_table)
 {
 	struct clk_programmable *prog;
 	struct clk_hw *hw;
-	struct clk_init_data init;
+	struct clk_init_data init = {};
 	int ret;
 
-	if (id > PROG_ID_MAX)
+	if (id > PROG_ID_MAX || !(parent_names || parent_hws))
 		return ERR_PTR(-EINVAL);
 
 	prog = kzalloc(sizeof(*prog), GFP_KERNEL);
@@ -233,7 +233,10 @@ at91_clk_register_programmable(struct regmap *regmap,
 
 	init.name = name;
 	init.ops = &programmable_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;
 

drivers/clk/at91/dt-compat.c

@@ -770,7 +770,7 @@ of_at91_clk_prog_setup(struct device_node *np,
 			name = progclknp->name;
 
 		hw = at91_clk_register_programmable(regmap, name,
-						    parent_names, num_parents,
+						    parent_names, NULL, num_parents,
 						    id, layout, mux_table);
 		if (IS_ERR(hw))
 			continue;

drivers/clk/at91/pmc.h

@@ -234,7 +234,8 @@ sam9x60_clk_register_frac_pll(struct regmap *regmap, spinlock_t *lock,
 
 struct clk_hw * __init
 at91_clk_register_programmable(struct regmap *regmap, const char *name,
-			       const char **parent_names, u8 num_parents, u8 id,
+			       const char **parent_names, struct clk_hw **parent_hws,
+			       u8 num_parents, u8 id,
 			       const struct clk_programmable_layout *layout,
 			       u32 *mux_table);
 

drivers/clk/at91/sam9x60.c

@@ -313,7 +313,7 @@ static void __init sam9x60_pmc_setup(struct device_node *np)
 		snprintf(name, sizeof(name), "prog%d", i);
 
 		hw = at91_clk_register_programmable(regmap, name,
-						    parent_names, 6, i,
+						    parent_names, NULL, 6, i,
 						    &sam9x60_programmable_layout,
 						    NULL);
 		if (IS_ERR(hw))