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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2018 BayLibre, SAS.
* Author: Jerome Brunet <jbrunet@baylibre.com>
*/
#ifndef __CLK_REGMAP_H
#define __CLK_REGMAP_H
#include <linux/clk-provider.h>
#include <linux/regmap.h>
/**
* struct clk_regmap - regmap backed clock
*
* @hw: handle between common and hardware-specific interfaces
* @map: pointer to the regmap structure controlling the clock
* @data: data specific to the clock type
*
* Clock which is controlled by regmap backed registers. The actual type of
* of the clock is controlled by the clock_ops and data.
*/
struct clk_regmap {
struct clk_hw hw;
struct regmap *map;
void *data;
};
#define to_clk_regmap(_hw) container_of(_hw, struct clk_regmap, hw)
/**
* struct clk_regmap_gate_data - regmap backed gate specific data
*
* @offset: offset of the register controlling gate
* @bit_idx: single bit controlling gate
* @flags: hardware-specific flags
*
* Flags:
* Same as clk_gate except CLK_GATE_HIWORD_MASK which is ignored
*/
struct clk_regmap_gate_data {
unsigned int offset;
u8 bit_idx;
u8 flags;
};
static inline struct clk_regmap_gate_data *
clk_get_regmap_gate_data(struct clk_regmap *clk)
{
return (struct clk_regmap_gate_data *)clk->data;
}
extern const struct clk_ops clk_regmap_gate_ops;
extern const struct clk_ops clk_regmap_gate_ro_ops;
/**
* struct clk_regmap_div_data - regmap backed adjustable divider specific data
*
* @offset: offset of the register controlling the divider
* @shift: shift to the divider bit field
* @width: width of the divider bit field
* @table: array of value/divider pairs, last entry should have div = 0
*
* Flags:
* Same as clk_divider except CLK_DIVIDER_HIWORD_MASK which is ignored
*/
struct clk_regmap_div_data {
unsigned int offset;
u8 shift;
u8 width;
u8 flags;
const struct clk_div_table *table;
};
static inline struct clk_regmap_div_data *
clk_get_regmap_div_data(struct clk_regmap *clk)
{
return (struct clk_regmap_div_data *)clk->data;
}
extern const struct clk_ops clk_regmap_divider_ops;
extern const struct clk_ops clk_regmap_divider_ro_ops;
/**
* struct clk_regmap_mux_data - regmap backed multiplexer clock specific data
*
* @hw: handle between common and hardware-specific interfaces
* @offset: offset of theregister controlling multiplexer
* @table: array of parent indexed register values
* @shift: shift to multiplexer bit field
* @mask: mask of mutliplexer bit field
* @flags: hardware-specific flags
*
* Flags:
* Same as clk_divider except CLK_MUX_HIWORD_MASK which is ignored
*/
struct clk_regmap_mux_data {
unsigned int offset;
u32 *table;
u32 mask;
u8 shift;
u8 flags;
};
static inline struct clk_regmap_mux_data *
clk_get_regmap_mux_data(struct clk_regmap *clk)
{
return (struct clk_regmap_mux_data *)clk->data;
}
extern const struct clk_ops clk_regmap_mux_ops;
extern const struct clk_ops clk_regmap_mux_ro_ops;
#define __MESON_GATE(_name, _reg, _bit, _ops) \
struct clk_regmap _name = { \
.data = &(struct clk_regmap_gate_data){ \
.offset = (_reg), \
.bit_idx = (_bit), \
}, \
.hw.init = &(struct clk_init_data) { \
.name = #_name, \
.ops = _ops, \
.parent_names = (const char *[]){ "clk81" }, \
.num_parents = 1, \
.flags = (CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED), \
}, \
}
#define MESON_GATE(_name, _reg, _bit) \
__MESON_GATE(_name, _reg, _bit, &clk_regmap_gate_ops)
#define MESON_GATE_RO(_name, _reg, _bit) \
__MESON_GATE(_name, _reg, _bit, &clk_regmap_gate_ro_ops)
#endif /* __CLK_REGMAP_H */
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