Export routines that can be used by other drivers avoiding duplicating code.
Signed-off-by: Dario Binacchi dariobin@libero.it Reviewed-by: Simon Glass sjg@chromium.org
---
(no changes since v2)
Changes in v2: - Add the clk_ prefix to the divider functions. - Add kernel-doc comments to the exported functions.
drivers/clk/clk-divider.c | 24 +++++++-------- include/linux/clk-provider.h | 57 ++++++++++++++++++++++++++++++++++++ 2 files changed, 69 insertions(+), 12 deletions(-)
diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c index 8f59d7fb72..9df50a5e72 100644 --- a/drivers/clk/clk-divider.c +++ b/drivers/clk/clk-divider.c @@ -28,8 +28,8 @@
#define UBOOT_DM_CLK_CCF_DIVIDER "ccf_clk_divider"
-static unsigned int _get_table_div(const struct clk_div_table *table, - unsigned int val) +unsigned int clk_divider_get_table_div(const struct clk_div_table *table, + unsigned int val) { const struct clk_div_table *clkt;
@@ -49,7 +49,7 @@ static unsigned int _get_div(const struct clk_div_table *table, if (flags & CLK_DIVIDER_MAX_AT_ZERO) return val ? val : clk_div_mask(width) + 1; if (table) - return _get_table_div(table, val); + return clk_divider_get_table_div(table, val); return val + 1; }
@@ -89,8 +89,8 @@ static ulong clk_divider_recalc_rate(struct clk *clk) divider->flags, divider->width); }
-static bool _is_valid_table_div(const struct clk_div_table *table, - unsigned int div) +bool clk_divider_is_valid_table_div(const struct clk_div_table *table, + unsigned int div) { const struct clk_div_table *clkt;
@@ -100,18 +100,18 @@ static bool _is_valid_table_div(const struct clk_div_table *table, return false; }
-static bool _is_valid_div(const struct clk_div_table *table, unsigned int div, - unsigned long flags) +bool clk_divider_is_valid_div(const struct clk_div_table *table, + unsigned int div, unsigned long flags) { if (flags & CLK_DIVIDER_POWER_OF_TWO) return is_power_of_2(div); if (table) - return _is_valid_table_div(table, div); + return clk_divider_is_valid_table_div(table, div); return true; }
-static unsigned int _get_table_val(const struct clk_div_table *table, - unsigned int div) +unsigned int clk_divider_get_table_val(const struct clk_div_table *table, + unsigned int div) { const struct clk_div_table *clkt;
@@ -131,7 +131,7 @@ static unsigned int _get_val(const struct clk_div_table *table, if (flags & CLK_DIVIDER_MAX_AT_ZERO) return (div == clk_div_mask(width) + 1) ? 0 : div; if (table) - return _get_table_val(table, div); + return clk_divider_get_table_val(table, div); return div - 1; } int divider_get_val(unsigned long rate, unsigned long parent_rate, @@ -142,7 +142,7 @@ int divider_get_val(unsigned long rate, unsigned long parent_rate,
div = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
- if (!_is_valid_div(table, div, flags)) + if (!clk_divider_is_valid_div(table, div, flags)) return -EINVAL;
value = _get_val(table, div, flags, width); diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index 79dce8f0ad..a94539037a 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -76,6 +76,19 @@ struct clk_mux { extern const struct clk_ops clk_mux_ops; u8 clk_mux_get_parent(struct clk *clk);
+/** + * clk_mux_index_to_val() - Convert the parent index to the register value + * + * It returns the value to write in the hardware register to output the selected + * input clock parent. + * + * @table: array of register values corresponding to the parent index (optional) + * @flags: hardware-specific flags + * @index: parent clock index + * @return the register value + */ +unsigned int clk_mux_index_to_val(u32 *table, unsigned int flags, u8 index); + struct clk_gate { struct clk clk; void __iomem *reg; @@ -125,6 +138,50 @@ struct clk_divider { #define CLK_DIVIDER_READ_ONLY BIT(5) #define CLK_DIVIDER_MAX_AT_ZERO BIT(6) extern const struct clk_ops clk_divider_ops; + +/** + * clk_divider_get_table_div() - convert the register value to the divider + * + * @table: array of register values corresponding to valid dividers + * @val: value to convert + * @return the divider + */ +unsigned int clk_divider_get_table_div(const struct clk_div_table *table, + unsigned int val); + +/** + * clk_divider_get_table_val() - convert the divider to the register value + * + * It returns the value to write in the hardware register to divide the input + * clock rate by @div. + * + * @table: array of register values corresponding to valid dividers + * @div: requested divider + * @return the register value + */ +unsigned int clk_divider_get_table_val(const struct clk_div_table *table, + unsigned int div); + +/** + * clk_divider_is_valid_div() - check if the divider is valid + * + * @table: array of valid dividers (optional) + * @div: divider to check + * @flags: hardware-specific flags + * @return true if the divider is valid, false otherwise + */ +bool clk_divider_is_valid_div(const struct clk_div_table *table, + unsigned int div, unsigned long flags); + +/** + * clk_divider_is_valid_table_div - check if the divider is in the @table array + * + * @table: array of valid dividers + * @div: divider to check + * @return true if the divider is found in the @table array, false otherwise + */ +bool clk_divider_is_valid_table_div(const struct clk_div_table *table, + unsigned int div); unsigned long divider_recalc_rate(struct clk *hw, unsigned long parent_rate, unsigned int val, const struct clk_div_table *table,