linux/drivers/clk/sunxi-ng/ccu_mux.h
Chen-Yu Tsai 178ca5312a clk: sunxi-ng: mux: Increase fixed pre-divider div size
Some clocks have a predivider value that is larger than what u8 can
store. One such example is the OUT clk found on A20/A31, which has
a /750 pre-divider on one of the osc24M parents.

Increase the size of the div field to u16.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-08-08 20:03:20 +02:00

92 lines
2.0 KiB
C

#ifndef _CCU_MUX_H_
#define _CCU_MUX_H_
#include <linux/clk-provider.h>
#include "ccu_common.h"
struct ccu_mux_internal {
u8 shift;
u8 width;
struct {
u8 index;
u16 div;
} fixed_prediv;
struct {
u8 index;
u8 shift;
u8 width;
} variable_prediv;
};
#define SUNXI_CLK_MUX(_shift, _width) \
{ \
.shift = _shift, \
.width = _width, \
}
struct ccu_mux {
u16 reg;
u32 enable;
struct ccu_mux_internal mux;
struct ccu_common common;
};
#define SUNXI_CCU_MUX(_struct, _name, _parents, _reg, _shift, _width, _flags) \
struct ccu_mux _struct = { \
.mux = SUNXI_CLK_MUX(_shift, _width), \
.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) \
struct ccu_mux _struct = { \
.enable = _gate, \
.mux = SUNXI_CLK_MUX(_shift, _width), \
.common = { \
.reg = _reg, \
.hw.init = CLK_HW_INIT_PARENTS(_name, \
_parents, \
&ccu_mux_ops, \
_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;
void ccu_mux_helper_adjust_parent_for_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 *,
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);
#endif /* _CCU_MUX_H_ */