mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
d754b15951
The current function name is a bit confusing, and doesn't really allow to create an explicit function to reverse the operation. We also for now change the parent rate through a pointer, while we don't return anything. In order to be less confusing, and easier to use for downstream users, change the function name to something hopefully clearer, and return the adjusted rate instead of changing the pointer. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Chen-Yu Tsai <wens@csie.org>
114 lines
2.8 KiB
C
114 lines
2.8 KiB
C
#ifndef _CCU_MUX_H_
|
|
#define _CCU_MUX_H_
|
|
|
|
#include <linux/clk-provider.h>
|
|
|
|
#include "ccu_common.h"
|
|
|
|
struct ccu_mux_fixed_prediv {
|
|
u8 index;
|
|
u16 div;
|
|
};
|
|
|
|
struct ccu_mux_internal {
|
|
u8 shift;
|
|
u8 width;
|
|
const u8 *table;
|
|
|
|
const struct ccu_mux_fixed_prediv *fixed_predivs;
|
|
u8 n_predivs;
|
|
|
|
struct {
|
|
u8 index;
|
|
u8 shift;
|
|
u8 width;
|
|
} variable_prediv;
|
|
};
|
|
|
|
#define _SUNXI_CCU_MUX_TABLE(_shift, _width, _table) \
|
|
{ \
|
|
.shift = _shift, \
|
|
.width = _width, \
|
|
.table = _table, \
|
|
}
|
|
|
|
#define _SUNXI_CCU_MUX(_shift, _width) \
|
|
_SUNXI_CCU_MUX_TABLE(_shift, _width, NULL)
|
|
|
|
struct ccu_mux {
|
|
u16 reg;
|
|
u32 enable;
|
|
|
|
struct ccu_mux_internal mux;
|
|
struct ccu_common common;
|
|
};
|
|
|
|
#define SUNXI_CCU_MUX_TABLE_WITH_GATE(_struct, _name, _parents, _table, \
|
|
_reg, _shift, _width, _gate, \
|
|
_flags) \
|
|
struct ccu_mux _struct = { \
|
|
.enable = _gate, \
|
|
.mux = _SUNXI_CCU_MUX_TABLE(_shift, _width, _table), \
|
|
.common = { \
|
|
.reg = _reg, \
|
|
.hw.init = CLK_HW_INIT_PARENTS(_name, \
|
|
_parents, \
|
|
&ccu_mux_ops, \
|
|
_flags), \
|
|
} \
|
|
}
|
|
|
|
#define SUNXI_CCU_MUX_WITH_GATE(_struct, _name, _parents, _reg, \
|
|
_shift, _width, _gate, _flags) \
|
|
SUNXI_CCU_MUX_TABLE_WITH_GATE(_struct, _name, _parents, NULL, \
|
|
_reg, _shift, _width, _gate, \
|
|
_flags)
|
|
|
|
#define SUNXI_CCU_MUX(_struct, _name, _parents, _reg, _shift, _width, \
|
|
_flags) \
|
|
SUNXI_CCU_MUX_TABLE_WITH_GATE(_struct, _name, _parents, NULL, \
|
|
_reg, _shift, _width, 0, _flags)
|
|
|
|
static inline struct ccu_mux *hw_to_ccu_mux(struct clk_hw *hw)
|
|
{
|
|
struct ccu_common *common = hw_to_ccu_common(hw);
|
|
|
|
return container_of(common, struct ccu_mux, common);
|
|
}
|
|
|
|
extern const struct clk_ops ccu_mux_ops;
|
|
|
|
unsigned long ccu_mux_helper_apply_prediv(struct ccu_common *common,
|
|
struct ccu_mux_internal *cm,
|
|
int parent_index,
|
|
unsigned long parent_rate);
|
|
int ccu_mux_helper_determine_rate(struct ccu_common *common,
|
|
struct ccu_mux_internal *cm,
|
|
struct clk_rate_request *req,
|
|
unsigned long (*round)(struct ccu_mux_internal *,
|
|
struct clk_hw *,
|
|
unsigned long *,
|
|
unsigned long,
|
|
void *),
|
|
void *data);
|
|
u8 ccu_mux_helper_get_parent(struct ccu_common *common,
|
|
struct ccu_mux_internal *cm);
|
|
int ccu_mux_helper_set_parent(struct ccu_common *common,
|
|
struct ccu_mux_internal *cm,
|
|
u8 index);
|
|
|
|
struct ccu_mux_nb {
|
|
struct notifier_block clk_nb;
|
|
struct ccu_common *common;
|
|
struct ccu_mux_internal *cm;
|
|
|
|
u32 delay_us; /* How many us to wait after reparenting */
|
|
u8 bypass_index; /* Which parent to temporarily use */
|
|
u8 original_index; /* This is set by the notifier callback */
|
|
};
|
|
|
|
#define to_ccu_mux_nb(_nb) container_of(_nb, struct ccu_mux_nb, clk_nb)
|
|
|
|
int ccu_mux_notifier_register(struct clk *clk, struct ccu_mux_nb *mux_nb);
|
|
|
|
#endif /* _CCU_MUX_H_ */
|