forked from Minki/linux
b906faf7b6
This patch adds members sz_reg fixed in struct mtk_pin_field_calc - The 'fixed' is used to represent the consecutive pins share the same bits within the same register with the 1st pin so that it can largely reduce the entry size a bit. - The 'sz_reg' is used to indicate the range of bits we use in a register that may vary by SoC The above changes make the code more generic and this is useful as there might be other existing or future chips all use the same logic to access their register set and then being a little more abstract could help in the long run. Signed-off-by: Ryder Lee <ryder.lee@mediatek.com> Signed-off-by: Sean Wang <sean.wang@mediatek.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
134 lines
3.7 KiB
C
134 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2018 MediaTek Inc.
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*
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* Author: Sean Wang <sean.wang@mediatek.com>
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*
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*/
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#ifndef __PINCTRL_MTK_COMMON_V2_H
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#define __PINCTRL_MTK_COMMON_V2_H
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#define MTK_GPIO_MODE 1
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#define MTK_INPUT 0
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#define MTK_OUTPUT 1
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#define MTK_DISABLE 0
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#define MTK_ENABLE 1
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#define PIN_FIELD_CALC(_s_pin, _e_pin, _s_addr, _x_addrs, _s_bit, \
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_x_bits, _sz_reg, _fixed) { \
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.s_pin = _s_pin, \
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.e_pin = _e_pin, \
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.s_addr = _s_addr, \
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.x_addrs = _x_addrs, \
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.s_bit = _s_bit, \
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.x_bits = _x_bits, \
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.sz_reg = _sz_reg, \
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.fixed = _fixed, \
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}
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#define PIN_FIELD(_s_pin, _e_pin, _s_addr, _x_addrs, _s_bit, _x_bits) \
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PIN_FIELD_CALC(_s_pin, _e_pin, _s_addr, _x_addrs, _s_bit, \
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_x_bits, 32, 0)
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#define PINS_FIELD(_s_pin, _e_pin, _s_addr, _x_addrs, _s_bit, _x_bits) \
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PIN_FIELD_CALC(_s_pin, _e_pin, _s_addr, _x_addrs, _s_bit, \
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_x_bits, 32, 1)
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/* List these attributes which could be modified for the pin */
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enum {
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PINCTRL_PIN_REG_MODE,
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PINCTRL_PIN_REG_DIR,
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PINCTRL_PIN_REG_DI,
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PINCTRL_PIN_REG_DO,
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PINCTRL_PIN_REG_SR,
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PINCTRL_PIN_REG_SMT,
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PINCTRL_PIN_REG_PD,
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PINCTRL_PIN_REG_PU,
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PINCTRL_PIN_REG_E4,
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PINCTRL_PIN_REG_E8,
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PINCTRL_PIN_REG_TDSEL,
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PINCTRL_PIN_REG_RDSEL,
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PINCTRL_PIN_REG_MAX,
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};
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/* struct mtk_pin_field - the structure that holds the information of the field
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* used to describe the attribute for the pin
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* @offset: the register offset relative to the base address
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* @mask: the mask used to filter out the field from the register
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* @bitpos: the start bit relative to the register
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* @next: the indication that the field would be extended to the
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next register
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*/
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struct mtk_pin_field {
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u32 offset;
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u32 mask;
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u8 bitpos;
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u8 next;
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};
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/* struct mtk_pin_field_calc - the structure that holds the range providing
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* the guide used to look up the relevant field
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* @s_pin: the start pin within the range
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* @e_pin: the end pin within the range
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* @s_addr: the start address for the range
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* @x_addrs: the address distance between two consecutive registers
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* within the range
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* @s_bit: the start bit for the first register within the range
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* @x_bits: the bit distance between two consecutive pins within
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* the range
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* @sz_reg: the size of bits in a register
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* @fixed: the consecutive pins share the same bits with the 1st
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* pin
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*/
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struct mtk_pin_field_calc {
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u16 s_pin;
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u16 e_pin;
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u32 s_addr;
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u8 x_addrs;
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u8 s_bit;
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u8 x_bits;
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u8 sz_reg;
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u8 fixed;
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};
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/* struct mtk_pin_reg_calc - the structure that holds all ranges used to
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* determine which register the pin would make use of
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* for certain pin attribute.
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* @range: the start address for the range
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* @nranges: the number of items in the range
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*/
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struct mtk_pin_reg_calc {
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const struct mtk_pin_field_calc *range;
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unsigned int nranges;
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};
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/* struct mtk_pin_soc - the structure that holds SoC-specific data */
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struct mtk_pin_soc {
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const struct mtk_pin_reg_calc *reg_cal;
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const struct pinctrl_pin_desc *pins;
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unsigned int npins;
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const struct group_desc *grps;
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unsigned int ngrps;
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const struct function_desc *funcs;
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unsigned int nfuncs;
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const struct mtk_eint_regs *eint_regs;
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const struct mtk_eint_hw *eint_hw;
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};
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struct mtk_pinctrl {
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struct pinctrl_dev *pctrl;
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void __iomem *base;
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struct device *dev;
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struct gpio_chip chip;
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const struct mtk_pin_soc *soc;
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struct mtk_eint *eint;
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};
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void mtk_rmw(struct mtk_pinctrl *pctl, u32 reg, u32 mask, u32 set);
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int mtk_hw_set_value(struct mtk_pinctrl *hw, int pin, int field, int value);
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int mtk_hw_get_value(struct mtk_pinctrl *hw, int pin, int field, int *value);
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#endif /* __PINCTRL_MTK_COMMON_V2_H */
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