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clk: export generic routines

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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>
This commit is contained in:
Dario Binacchi
2020-12-30 00:06:27 +01:00
committed by Lokesh Vutla
parent ffa6602905
commit 5688f3bf0b
2 changed files with 69 additions and 12 deletions
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57
include/linux/clk-provider.h
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@@ -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,