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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) STMicroelectronics 2022 - All Rights Reserved
* Author: Gabriel Fernandez <gabriel.fernandez@foss.st.com> for STMicroelectronics.
*/
#include <linux/clk-provider.h>
struct stm32_rcc_match_data;
struct stm32_mux_cfg {
u16 offset;
u8 shift;
u8 width;
u8 flags;
u32 *table;
u8 ready;
};
struct stm32_gate_cfg {
u16 offset;
u8 bit_idx;
u8 set_clr;
};
struct stm32_div_cfg {
u16 offset;
u8 shift;
u8 width;
u8 flags;
u8 ready;
const struct clk_div_table *table;
};
struct stm32_composite_cfg {
int mux;
int gate;
int div;
};
#define NO_ID 0xFFFFFFFF
#define NO_STM32_MUX 0xFFFF
#define NO_STM32_DIV 0xFFFF
#define NO_STM32_GATE 0xFFFF
struct clock_config {
unsigned long id;
int sec_id;
void *clock_cfg;
struct clk_hw *(*func)(struct device *dev,
const struct stm32_rcc_match_data *data,
void __iomem *base,
spinlock_t *lock,
const struct clock_config *cfg);
};
struct clk_stm32_clock_data {
u16 *gate_cpt;
const struct stm32_gate_cfg *gates;
const struct stm32_mux_cfg *muxes;
const struct stm32_div_cfg *dividers;
struct clk_hw *(*is_multi_mux)(struct clk_hw *hw);
};
struct stm32_rcc_match_data {
struct clk_hw_onecell_data *hw_clks;
unsigned int num_clocks;
const struct clock_config *tab_clocks;
unsigned int maxbinding;
struct clk_stm32_clock_data *clock_data;
struct clk_stm32_reset_data *reset_data;
int (*check_security)(void __iomem *base,
const struct clock_config *cfg);
int (*multi_mux)(void __iomem *base, const struct clock_config *cfg);
};
int stm32_rcc_init(struct device *dev, const struct of_device_id *match_data,
void __iomem *base);
/* MUX define */
#define MUX_NO_RDY 0xFF
#define MUX_SAFE BIT(7)
/* DIV define */
#define DIV_NO_RDY 0xFF
/* Definition of clock structure */
struct clk_stm32_mux {
u16 mux_id;
struct clk_hw hw;
void __iomem *base;
struct clk_stm32_clock_data *clock_data;
spinlock_t *lock; /* spin lock */
};
#define to_clk_stm32_mux(_hw) container_of(_hw, struct clk_stm32_mux, hw)
struct clk_stm32_gate {
u16 gate_id;
struct clk_hw hw;
void __iomem *base;
struct clk_stm32_clock_data *clock_data;
spinlock_t *lock; /* spin lock */
};
#define to_clk_stm32_gate(_hw) container_of(_hw, struct clk_stm32_gate, hw)
struct clk_stm32_div {
u16 div_id;
struct clk_hw hw;
void __iomem *base;
struct clk_stm32_clock_data *clock_data;
spinlock_t *lock; /* spin lock */
};
#define to_clk_stm32_divider(_hw) container_of(_hw, struct clk_stm32_div, hw)
struct clk_stm32_composite {
u16 gate_id;
u16 mux_id;
u16 div_id;
struct clk_hw hw;
void __iomem *base;
struct clk_stm32_clock_data *clock_data;
spinlock_t *lock; /* spin lock */
};
#define to_clk_stm32_composite(_hw) container_of(_hw, struct clk_stm32_composite, hw)
/* Clock operators */
extern const struct clk_ops clk_stm32_mux_ops;
extern const struct clk_ops clk_stm32_gate_ops;
extern const struct clk_ops clk_stm32_divider_ops;
extern const struct clk_ops clk_stm32_composite_ops;
/* Clock registering */
struct clk_hw *clk_stm32_mux_register(struct device *dev,
const struct stm32_rcc_match_data *data,
void __iomem *base,
spinlock_t *lock,
const struct clock_config *cfg);
struct clk_hw *clk_stm32_gate_register(struct device *dev,
const struct stm32_rcc_match_data *data,
void __iomem *base,
spinlock_t *lock,
const struct clock_config *cfg);
struct clk_hw *clk_stm32_div_register(struct device *dev,
const struct stm32_rcc_match_data *data,
void __iomem *base,
spinlock_t *lock,
const struct clock_config *cfg);
struct clk_hw *clk_stm32_composite_register(struct device *dev,
const struct stm32_rcc_match_data *data,
void __iomem *base,
spinlock_t *lock,
const struct clock_config *cfg);
#define STM32_CLOCK_CFG(_binding, _clk, _sec_id, _struct, _register)\
{\
.id = (_binding),\
.sec_id = (_sec_id),\
.clock_cfg = (_struct) {_clk},\
.func = (_register),\
}
#define STM32_MUX_CFG(_binding, _clk, _sec_id)\
STM32_CLOCK_CFG(_binding, &(_clk), _sec_id, struct clk_stm32_mux *,\
&clk_stm32_mux_register)
#define STM32_GATE_CFG(_binding, _clk, _sec_id)\
STM32_CLOCK_CFG(_binding, &(_clk), _sec_id, struct clk_stm32_gate *,\
&clk_stm32_gate_register)
#define STM32_DIV_CFG(_binding, _clk, _sec_id)\
STM32_CLOCK_CFG(_binding, &(_clk), _sec_id, struct clk_stm32_div *,\
&clk_stm32_div_register)
#define STM32_COMPOSITE_CFG(_binding, _clk, _sec_id)\
STM32_CLOCK_CFG(_binding, &(_clk), _sec_id, struct clk_stm32_composite *,\
&clk_stm32_composite_register)
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