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path: root/drivers/clk/ti/divider.c
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Diffstat (limited to 'drivers/clk/ti/divider.c')
-rw-r--r--drivers/clk/ti/divider.c128
1 files changed, 72 insertions, 56 deletions
diff --git a/drivers/clk/ti/divider.c b/drivers/clk/ti/divider.c
index 6bb8778..88f04a4 100644
--- a/drivers/clk/ti/divider.c
+++ b/drivers/clk/ti/divider.c
@@ -39,7 +39,7 @@ static unsigned int _get_table_maxdiv(const struct clk_div_table *table)
return maxdiv;
}
-static unsigned int _get_maxdiv(struct clk_divider *divider)
+static unsigned int _get_maxdiv(struct clk_omap_divider *divider)
{
if (divider->flags & CLK_DIVIDER_ONE_BASED)
return div_mask(divider);
@@ -61,7 +61,7 @@ static unsigned int _get_table_div(const struct clk_div_table *table,
return 0;
}
-static unsigned int _get_div(struct clk_divider *divider, unsigned int val)
+static unsigned int _get_div(struct clk_omap_divider *divider, unsigned int val)
{
if (divider->flags & CLK_DIVIDER_ONE_BASED)
return val;
@@ -83,7 +83,7 @@ static unsigned int _get_table_val(const struct clk_div_table *table,
return 0;
}
-static unsigned int _get_val(struct clk_divider *divider, u8 div)
+static unsigned int _get_val(struct clk_omap_divider *divider, u8 div)
{
if (divider->flags & CLK_DIVIDER_ONE_BASED)
return div;
@@ -97,10 +97,10 @@ static unsigned int _get_val(struct clk_divider *divider, u8 div)
static unsigned long ti_clk_divider_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
- struct clk_divider *divider = to_clk_divider(hw);
+ struct clk_omap_divider *divider = to_clk_omap_divider(hw);
unsigned int div, val;
- val = ti_clk_ll_ops->clk_readl(divider->reg) >> divider->shift;
+ val = ti_clk_ll_ops->clk_readl(&divider->reg) >> divider->shift;
val &= div_mask(divider);
div = _get_div(divider, val);
@@ -131,7 +131,7 @@ static bool _is_valid_table_div(const struct clk_div_table *table,
return false;
}
-static bool _is_valid_div(struct clk_divider *divider, unsigned int div)
+static bool _is_valid_div(struct clk_omap_divider *divider, unsigned int div)
{
if (divider->flags & CLK_DIVIDER_POWER_OF_TWO)
return is_power_of_2(div);
@@ -172,7 +172,7 @@ static int _div_round(const struct clk_div_table *table,
static int ti_clk_divider_bestdiv(struct clk_hw *hw, unsigned long rate,
unsigned long *best_parent_rate)
{
- struct clk_divider *divider = to_clk_divider(hw);
+ struct clk_omap_divider *divider = to_clk_omap_divider(hw);
int i, bestdiv = 0;
unsigned long parent_rate, best = 0, now, maxdiv;
unsigned long parent_rate_saved = *best_parent_rate;
@@ -239,14 +239,14 @@ static long ti_clk_divider_round_rate(struct clk_hw *hw, unsigned long rate,
static int ti_clk_divider_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
- struct clk_divider *divider;
+ struct clk_omap_divider *divider;
unsigned int div, value;
u32 val;
if (!hw || !rate)
return -EINVAL;
- divider = to_clk_divider(hw);
+ divider = to_clk_omap_divider(hw);
div = DIV_ROUND_UP(parent_rate, rate);
value = _get_val(divider, div);
@@ -257,11 +257,11 @@ static int ti_clk_divider_set_rate(struct clk_hw *hw, unsigned long rate,
if (divider->flags & CLK_DIVIDER_HIWORD_MASK) {
val = div_mask(divider) << (divider->shift + 16);
} else {
- val = ti_clk_ll_ops->clk_readl(divider->reg);
+ val = ti_clk_ll_ops->clk_readl(&divider->reg);
val &= ~(div_mask(divider) << divider->shift);
}
val |= value << divider->shift;
- ti_clk_ll_ops->clk_writel(val, divider->reg);
+ ti_clk_ll_ops->clk_writel(val, &divider->reg);
return 0;
}
@@ -274,11 +274,12 @@ const struct clk_ops ti_clk_divider_ops = {
static struct clk *_register_divider(struct device *dev, const char *name,
const char *parent_name,
- unsigned long flags, void __iomem *reg,
+ unsigned long flags,
+ struct clk_omap_reg *reg,
u8 shift, u8 width, u8 clk_divider_flags,
const struct clk_div_table *table)
{
- struct clk_divider *div;
+ struct clk_omap_divider *div;
struct clk *clk;
struct clk_init_data init;
@@ -303,7 +304,7 @@ static struct clk *_register_divider(struct device *dev, const char *name,
init.num_parents = (parent_name ? 1 : 0);
/* struct clk_divider assignments */
- div->reg = reg;
+ memcpy(&div->reg, reg, sizeof(*reg));
div->shift = shift;
div->width = width;
div->flags = clk_divider_flags;
@@ -311,7 +312,7 @@ static struct clk *_register_divider(struct device *dev, const char *name,
div->table = table;
/* register the clock */
- clk = clk_register(dev, &div->hw);
+ clk = ti_clk_register(dev, &div->hw, name);
if (IS_ERR(clk))
kfree(div);
@@ -319,20 +320,17 @@ static struct clk *_register_divider(struct device *dev, const char *name,
return clk;
}
-static struct clk_div_table *
-_get_div_table_from_setup(struct ti_clk_divider *setup, u8 *width)
+int ti_clk_parse_divider_data(int *div_table, int num_dividers, int max_div,
+ u8 flags, u8 *width,
+ const struct clk_div_table **table)
{
int valid_div = 0;
- struct clk_div_table *table;
- int i;
- int div;
u32 val;
- u8 flags;
-
- if (!setup->num_dividers) {
- /* Clk divider table not provided, determine min/max divs */
- flags = setup->flags;
+ int div;
+ int i;
+ struct clk_div_table *tmp;
+ if (!div_table) {
if (flags & CLKF_INDEX_STARTS_AT_ONE)
val = 1;
else
@@ -340,7 +338,7 @@ _get_div_table_from_setup(struct ti_clk_divider *setup, u8 *width)
div = 1;
- while (div < setup->max_div) {
+ while (div < max_div) {
if (flags & CLKF_INDEX_POWER_OF_TWO)
div <<= 1;
else
@@ -349,37 +347,59 @@ _get_div_table_from_setup(struct ti_clk_divider *setup, u8 *width)
}
*width = fls(val);
+ *table = NULL;
- return NULL;
+ return 0;
}
- for (i = 0; i < setup->num_dividers; i++)
- if (setup->dividers[i])
+ i = 0;
+
+ while (!num_dividers || i < num_dividers) {
+ if (div_table[i] == -1)
+ break;
+ if (div_table[i])
valid_div++;
+ i++;
+ }
- table = kzalloc(sizeof(*table) * (valid_div + 1), GFP_KERNEL);
- if (!table)
- return ERR_PTR(-ENOMEM);
+ num_dividers = i;
+
+ tmp = kzalloc(sizeof(*tmp) * (valid_div + 1), GFP_KERNEL);
+ if (!tmp)
+ return -ENOMEM;
valid_div = 0;
*width = 0;
- for (i = 0; i < setup->num_dividers; i++)
- if (setup->dividers[i]) {
- table[valid_div].div = setup->dividers[i];
- table[valid_div].val = i;
+ for (i = 0; i < num_dividers; i++)
+ if (div_table[i] > 0) {
+ tmp[valid_div].div = div_table[i];
+ tmp[valid_div].val = i;
valid_div++;
*width = i;
}
*width = fls(*width);
+ *table = tmp;
+
+ return 0;
+}
+
+static const struct clk_div_table *
+_get_div_table_from_setup(struct ti_clk_divider *setup, u8 *width)
+{
+ const struct clk_div_table *table = NULL;
+
+ ti_clk_parse_divider_data(setup->dividers, setup->num_dividers,
+ setup->max_div, setup->flags, width,
+ &table);
return table;
}
struct clk_hw *ti_clk_build_component_div(struct ti_clk_divider *setup)
{
- struct clk_divider *div;
+ struct clk_omap_divider *div;
struct clk_omap_reg *reg;
if (!setup)
@@ -408,22 +428,17 @@ struct clk_hw *ti_clk_build_component_div(struct ti_clk_divider *setup)
struct clk *ti_clk_register_divider(struct ti_clk *setup)
{
- struct ti_clk_divider *div;
- struct clk_omap_reg *reg_setup;
- u32 reg;
+ struct ti_clk_divider *div = setup->data;
+ struct clk_omap_reg reg = {
+ .index = div->module,
+ .offset = div->reg,
+ };
u8 width;
u32 flags = 0;
u8 div_flags = 0;
- struct clk_div_table *table;
+ const struct clk_div_table *table;
struct clk *clk;
- div = setup->data;
-
- reg_setup = (struct clk_omap_reg *)&reg;
-
- reg_setup->index = div->module;
- reg_setup->offset = div->reg;
-
if (div->flags & CLKF_INDEX_STARTS_AT_ONE)
div_flags |= CLK_DIVIDER_ONE_BASED;
@@ -438,7 +453,7 @@ struct clk *ti_clk_register_divider(struct ti_clk *setup)
return (struct clk *)table;
clk = _register_divider(NULL, setup->name, div->parent,
- flags, (void __iomem *)reg, div->bit_shift,
+ flags, &reg, div->bit_shift,
width, div_flags, table);
if (IS_ERR(clk))
@@ -542,14 +557,15 @@ static int _get_divider_width(struct device_node *node,
}
static int __init ti_clk_divider_populate(struct device_node *node,
- void __iomem **reg, const struct clk_div_table **table,
+ struct clk_omap_reg *reg, const struct clk_div_table **table,
u32 *flags, u8 *div_flags, u8 *width, u8 *shift)
{
u32 val;
+ int ret;
- *reg = ti_clk_get_reg_addr(node, 0);
- if (IS_ERR(*reg))
- return PTR_ERR(*reg);
+ ret = ti_clk_get_reg_addr(node, 0, reg);
+ if (ret)
+ return ret;
if (!of_property_read_u32(node, "ti,bit-shift", &val))
*shift = val;
@@ -588,7 +604,7 @@ static void __init of_ti_divider_clk_setup(struct device_node *node)
{
struct clk *clk;
const char *parent_name;
- void __iomem *reg;
+ struct clk_omap_reg reg;
u8 clk_divider_flags = 0;
u8 width = 0;
u8 shift = 0;
@@ -601,7 +617,7 @@ static void __init of_ti_divider_clk_setup(struct device_node *node)
&clk_divider_flags, &width, &shift))
goto cleanup;
- clk = _register_divider(NULL, node->name, parent_name, flags, reg,
+ clk = _register_divider(NULL, node->name, parent_name, flags, &reg,
shift, width, clk_divider_flags, table);
if (!IS_ERR(clk)) {
@@ -617,7 +633,7 @@ CLK_OF_DECLARE(divider_clk, "ti,divider-clock", of_ti_divider_clk_setup);
static void __init of_ti_composite_divider_clk_setup(struct device_node *node)
{
- struct clk_divider *div;
+ struct clk_omap_divider *div;
u32 val;
div = kzalloc(sizeof(*div), GFP_KERNEL);