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path: root/drivers/clk/samsung/clk.c
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Diffstat (limited to 'drivers/clk/samsung/clk.c')
-rw-r--r--drivers/clk/samsung/clk.c123
1 files changed, 69 insertions, 54 deletions
diff --git a/drivers/clk/samsung/clk.c b/drivers/clk/samsung/clk.c
index 91bec3ebdc8..49629c71c9e 100644
--- a/drivers/clk/samsung/clk.c
+++ b/drivers/clk/samsung/clk.c
@@ -14,13 +14,6 @@
#include <linux/syscore_ops.h>
#include "clk.h"
-static DEFINE_SPINLOCK(lock);
-static struct clk **clk_table;
-static void __iomem *reg_base;
-#ifdef CONFIG_OF
-static struct clk_onecell_data clk_data;
-#endif
-
void samsung_clk_save(void __iomem *base,
struct samsung_clk_reg_dump *rd,
unsigned int num_regs)
@@ -55,40 +48,58 @@ struct samsung_clk_reg_dump *samsung_clk_alloc_reg_dump(
}
/* setup the essentials required to support clock lookup using ccf */
-void __init samsung_clk_init(struct device_node *np, void __iomem *base,
- unsigned long nr_clks)
+struct samsung_clk_provider *__init samsung_clk_init(struct device_node *np,
+ void __iomem *base, unsigned long nr_clks)
{
- reg_base = base;
+ struct samsung_clk_provider *ctx;
+ struct clk **clk_table;
+ int ret;
+ int i;
- clk_table = kzalloc(sizeof(struct clk *) * nr_clks, GFP_KERNEL);
+ ctx = kzalloc(sizeof(struct samsung_clk_provider), GFP_KERNEL);
+ if (!ctx)
+ panic("could not allocate clock provider context.\n");
+
+ clk_table = kcalloc(nr_clks, sizeof(struct clk *), GFP_KERNEL);
if (!clk_table)
panic("could not allocate clock lookup table\n");
+ for (i = 0; i < nr_clks; ++i)
+ clk_table[i] = ERR_PTR(-ENOENT);
+
+ ctx->reg_base = base;
+ ctx->clk_data.clks = clk_table;
+ ctx->clk_data.clk_num = nr_clks;
+ spin_lock_init(&ctx->lock);
+
if (!np)
- return;
+ return ctx;
-#ifdef CONFIG_OF
- clk_data.clks = clk_table;
- clk_data.clk_num = nr_clks;
- of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
-#endif
+ ret = of_clk_add_provider(np, of_clk_src_onecell_get,
+ &ctx->clk_data);
+ if (ret)
+ panic("could not register clock provide\n");
+
+ return ctx;
}
/* add a clock instance to the clock lookup table used for dt based lookup */
-void samsung_clk_add_lookup(struct clk *clk, unsigned int id)
+void samsung_clk_add_lookup(struct samsung_clk_provider *ctx, struct clk *clk,
+ unsigned int id)
{
- if (clk_table && id)
- clk_table[id] = clk;
+ if (ctx->clk_data.clks && id)
+ ctx->clk_data.clks[id] = clk;
}
/* register a list of aliases */
-void __init samsung_clk_register_alias(struct samsung_clock_alias *list,
- unsigned int nr_clk)
+void __init samsung_clk_register_alias(struct samsung_clk_provider *ctx,
+ struct samsung_clock_alias *list,
+ unsigned int nr_clk)
{
struct clk *clk;
unsigned int idx, ret;
- if (!clk_table) {
+ if (!ctx->clk_data.clks) {
pr_err("%s: clock table missing\n", __func__);
return;
}
@@ -100,7 +111,7 @@ void __init samsung_clk_register_alias(struct samsung_clock_alias *list,
continue;
}
- clk = clk_table[list->id];
+ clk = ctx->clk_data.clks[list->id];
if (!clk) {
pr_err("%s: failed to find clock %d\n", __func__,
list->id);
@@ -115,7 +126,7 @@ void __init samsung_clk_register_alias(struct samsung_clock_alias *list,
}
/* register a list of fixed clocks */
-void __init samsung_clk_register_fixed_rate(
+void __init samsung_clk_register_fixed_rate(struct samsung_clk_provider *ctx,
struct samsung_fixed_rate_clock *list, unsigned int nr_clk)
{
struct clk *clk;
@@ -130,7 +141,7 @@ void __init samsung_clk_register_fixed_rate(
continue;
}
- samsung_clk_add_lookup(clk, list->id);
+ samsung_clk_add_lookup(ctx, clk, list->id);
/*
* Unconditionally add a clock lookup for the fixed rate clocks.
@@ -144,7 +155,7 @@ void __init samsung_clk_register_fixed_rate(
}
/* register a list of fixed factor clocks */
-void __init samsung_clk_register_fixed_factor(
+void __init samsung_clk_register_fixed_factor(struct samsung_clk_provider *ctx,
struct samsung_fixed_factor_clock *list, unsigned int nr_clk)
{
struct clk *clk;
@@ -159,28 +170,30 @@ void __init samsung_clk_register_fixed_factor(
continue;
}
- samsung_clk_add_lookup(clk, list->id);
+ samsung_clk_add_lookup(ctx, clk, list->id);
}
}
/* register a list of mux clocks */
-void __init samsung_clk_register_mux(struct samsung_mux_clock *list,
- unsigned int nr_clk)
+void __init samsung_clk_register_mux(struct samsung_clk_provider *ctx,
+ struct samsung_mux_clock *list,
+ unsigned int nr_clk)
{
struct clk *clk;
unsigned int idx, ret;
for (idx = 0; idx < nr_clk; idx++, list++) {
clk = clk_register_mux(NULL, list->name, list->parent_names,
- list->num_parents, list->flags, reg_base + list->offset,
- list->shift, list->width, list->mux_flags, &lock);
+ list->num_parents, list->flags,
+ ctx->reg_base + list->offset,
+ list->shift, list->width, list->mux_flags, &ctx->lock);
if (IS_ERR(clk)) {
pr_err("%s: failed to register clock %s\n", __func__,
list->name);
continue;
}
- samsung_clk_add_lookup(clk, list->id);
+ samsung_clk_add_lookup(ctx, clk, list->id);
/* register a clock lookup only if a clock alias is specified */
if (list->alias) {
@@ -194,8 +207,9 @@ void __init samsung_clk_register_mux(struct samsung_mux_clock *list,
}
/* register a list of div clocks */
-void __init samsung_clk_register_div(struct samsung_div_clock *list,
- unsigned int nr_clk)
+void __init samsung_clk_register_div(struct samsung_clk_provider *ctx,
+ struct samsung_div_clock *list,
+ unsigned int nr_clk)
{
struct clk *clk;
unsigned int idx, ret;
@@ -203,22 +217,22 @@ void __init samsung_clk_register_div(struct samsung_div_clock *list,
for (idx = 0; idx < nr_clk; idx++, list++) {
if (list->table)
clk = clk_register_divider_table(NULL, list->name,
- list->parent_name, list->flags,
- reg_base + list->offset, list->shift,
- list->width, list->div_flags,
- list->table, &lock);
+ list->parent_name, list->flags,
+ ctx->reg_base + list->offset,
+ list->shift, list->width, list->div_flags,
+ list->table, &ctx->lock);
else
clk = clk_register_divider(NULL, list->name,
- list->parent_name, list->flags,
- reg_base + list->offset, list->shift,
- list->width, list->div_flags, &lock);
+ list->parent_name, list->flags,
+ ctx->reg_base + list->offset, list->shift,
+ list->width, list->div_flags, &ctx->lock);
if (IS_ERR(clk)) {
pr_err("%s: failed to register clock %s\n", __func__,
list->name);
continue;
}
- samsung_clk_add_lookup(clk, list->id);
+ samsung_clk_add_lookup(ctx, clk, list->id);
/* register a clock lookup only if a clock alias is specified */
if (list->alias) {
@@ -232,16 +246,17 @@ void __init samsung_clk_register_div(struct samsung_div_clock *list,
}
/* register a list of gate clocks */
-void __init samsung_clk_register_gate(struct samsung_gate_clock *list,
- unsigned int nr_clk)
+void __init samsung_clk_register_gate(struct samsung_clk_provider *ctx,
+ struct samsung_gate_clock *list,
+ unsigned int nr_clk)
{
struct clk *clk;
unsigned int idx, ret;
for (idx = 0; idx < nr_clk; idx++, list++) {
clk = clk_register_gate(NULL, list->name, list->parent_name,
- list->flags, reg_base + list->offset,
- list->bit_idx, list->gate_flags, &lock);
+ list->flags, ctx->reg_base + list->offset,
+ list->bit_idx, list->gate_flags, &ctx->lock);
if (IS_ERR(clk)) {
pr_err("%s: failed to register clock %s\n", __func__,
list->name);
@@ -257,7 +272,7 @@ void __init samsung_clk_register_gate(struct samsung_gate_clock *list,
__func__, list->alias);
}
- samsung_clk_add_lookup(clk, list->id);
+ samsung_clk_add_lookup(ctx, clk, list->id);
}
}
@@ -266,21 +281,21 @@ void __init samsung_clk_register_gate(struct samsung_gate_clock *list,
* tree and register it
*/
#ifdef CONFIG_OF
-void __init samsung_clk_of_register_fixed_ext(
+void __init samsung_clk_of_register_fixed_ext(struct samsung_clk_provider *ctx,
struct samsung_fixed_rate_clock *fixed_rate_clk,
unsigned int nr_fixed_rate_clk,
struct of_device_id *clk_matches)
{
const struct of_device_id *match;
- struct device_node *np;
+ struct device_node *clk_np;
u32 freq;
- for_each_matching_node_and_match(np, clk_matches, &match) {
- if (of_property_read_u32(np, "clock-frequency", &freq))
+ for_each_matching_node_and_match(clk_np, clk_matches, &match) {
+ if (of_property_read_u32(clk_np, "clock-frequency", &freq))
continue;
- fixed_rate_clk[(u32)match->data].fixed_rate = freq;
+ fixed_rate_clk[(unsigned long)match->data].fixed_rate = freq;
}
- samsung_clk_register_fixed_rate(fixed_rate_clk, nr_fixed_rate_clk);
+ samsung_clk_register_fixed_rate(ctx, fixed_rate_clk, nr_fixed_rate_clk);
}
#endif
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-27 05:41:55 +0000