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/*
* Copyright (C) 2017 Sanechips Technology Co., Ltd.
* Copyright 2017 Linaro Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __PINCTRL_ZX_H
#define __PINCTRL_ZX_H
/**
* struct zx_mux_desc - hardware mux descriptor
* @name: mux function name
* @muxval: mux register bit value
*/
struct zx_mux_desc {
const char *name;
u8 muxval;
};
/**
* struct zx_pin_data - hardware per-pin data
* @aon_pin: whether it's an AON pin
* @offset: register offset within TOP pinmux controller
* @bitpos: bit position within TOP pinmux register
* @width: bit width within TOP pinmux register
* @coffset: pinconf register offset within AON controller
* @cbitpos: pinconf bit position within AON register
* @muxes: available mux function names and corresponding register values
*
* Unlike TOP pinmux and AON pinconf registers which are arranged pretty
* arbitrarily, AON pinmux register bits are well organized per pin id, and
* each pin occupies two bits, so that we can calculate the AON register offset
* and bit position from pin id. Thus, we only need to define TOP pinmux and
* AON pinconf register data for the pin.
*/
struct zx_pin_data {
bool aon_pin;
u16 offset;
u16 bitpos;
u16 width;
u16 coffset;
u16 cbitpos;
struct zx_mux_desc *muxes;
};
struct zx_pinctrl_soc_info {
const struct pinctrl_pin_desc *pins;
unsigned int npins;
};
#define TOP_PIN(pin, off, bp, wd, coff, cbp, ...) { \
.number = pin, \
.name = #pin, \
.drv_data = &(struct zx_pin_data) { \
.aon_pin = false, \
.offset = off, \
.bitpos = bp, \
.width = wd, \
.coffset = coff, \
.cbitpos = cbp, \
.muxes = (struct zx_mux_desc[]) { \
__VA_ARGS__, { } }, \
}, \
}
#define AON_PIN(pin, off, bp, wd, coff, cbp, ...) { \
.number = pin, \
.name = #pin, \
.drv_data = &(struct zx_pin_data) { \
.aon_pin = true, \
.offset = off, \
.bitpos = bp, \
.width = wd, \
.coffset = coff, \
.cbitpos = cbp, \
.muxes = (struct zx_mux_desc[]) { \
__VA_ARGS__, { } }, \
}, \
}
#define ZX_RESERVED(pin) PINCTRL_PIN(pin, #pin)
#define TOP_MUX(_val, _name) { \
.name = _name, \
.muxval = _val, \
}
/*
* When the flag is set, it's a mux configuration for an AON pin that sits in
* AON register. Otherwise, it's one for AON pin but sitting in TOP register.
*/
#define AON_MUX_FLAG BIT(7)
#define AON_MUX(_val, _name) { \
.name = _name, \
.muxval = _val | AON_MUX_FLAG, \
}
int zx_pinctrl_init(struct platform_device *pdev,
struct zx_pinctrl_soc_info *info);
#endif /* __PINCTRL_ZX_H */
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