diff options
Diffstat (limited to 'drivers/pinctrl/mediatek/pinctrl-mtk-common.h')
| -rw-r--r-- | drivers/pinctrl/mediatek/pinctrl-mtk-common.h | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.h b/drivers/pinctrl/mediatek/pinctrl-mtk-common.h new file mode 100644 index 000000000000..95a9d57ca1fd --- /dev/null +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.h @@ -0,0 +1,185 @@ +/* + * Copyright (c) 2014 MediaTek Inc. + * Author: Hongzhou.Yang <hongzhou.yang@mediatek.com> + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef __PINCTRL_MTK_COMMON_H +#define __PINCTRL_MTK_COMMON_H + +#include <linux/pinctrl/pinctrl.h> +#include <linux/spinlock.h> +#include <linux/regmap.h> + +#define NO_EINT_SUPPORT 255 + +struct mtk_desc_function { + const char *name; + unsigned char muxval; +}; + +struct mtk_desc_eint { + unsigned char eintmux; + unsigned char eintnum; +}; + +struct mtk_desc_pin { + struct pinctrl_pin_desc pin; + const char *chip; + const struct mtk_desc_eint eint; + const struct mtk_desc_function *functions; +}; + +#define MTK_PIN(_pin, _pad, _chip, _eint, ...) \ + { \ + .pin = _pin, \ + .chip = _chip, \ + .eint = _eint, \ + .functions = (struct mtk_desc_function[]){ \ + __VA_ARGS__, { } }, \ + } + +#define MTK_EINT_FUNCTION(_eintmux, _eintnum) \ + { \ + .eintmux = _eintmux, \ + .eintnum = _eintnum, \ + } + +#define MTK_FUNCTION(_val, _name) \ + { \ + .muxval = _val, \ + .name = _name, \ + } + +#define SET_ADDR(x, y) (x + (y->devdata->port_align)) +#define CLR_ADDR(x, y) (x + (y->devdata->port_align << 1)) + +struct mtk_pinctrl_group { + const char *name; + unsigned long config; + unsigned pin; +}; + +/** + * struct mtk_drv_group_desc - Provide driving group data. + * @max_drv: The maximum current of this group. + * @min_drv: The minimum current of this group. + * @low_bit: The lowest bit of this group. + * @high_bit: The highest bit of this group. + * @step: The step current of this group. + */ +struct mtk_drv_group_desc { + unsigned char min_drv; + unsigned char max_drv; + unsigned char low_bit; + unsigned char high_bit; + unsigned char step; +}; + +#define MTK_DRV_GRP(_min, _max, _low, _high, _step) \ + { \ + .min_drv = _min, \ + .max_drv = _max, \ + .low_bit = _low, \ + .high_bit = _high, \ + .step = _step, \ + } + +/** + * struct mtk_pin_drv_grp - Provide each pin driving info. + * @pin: The pin number. + * @offset: The offset of driving register for this pin. + * @bit: The bit of driving register for this pin. + * @grp: The group for this pin belongs to. + */ +struct mtk_pin_drv_grp { + unsigned int pin; + unsigned int offset; + unsigned char bit; + unsigned char grp; +}; + +#define MTK_PIN_DRV_GRP(_pin, _offset, _bit, _grp) \ + { \ + .pin = _pin, \ + .offset = _offset, \ + .bit = _bit, \ + .grp = _grp, \ + } + +/** + * struct mtk_pinctrl_devdata - Provide HW GPIO related data. + * @pins: An array describing all pins the pin controller affects. + * @npins: The number of entries in @pins. + * + * @grp_desc: The driving group info. + * @pin_drv_grp: The driving group for all pins. + * @spec_pull_set: Each SoC may have special pins for pull up/down setting, + * these pins' pull setting are very different, they have separate pull + * up/down bit, R0 and R1 resistor bit, so they need special pull setting. + * If special setting is success, this should return 0, otherwise it should + * return non-zero value. + * + * @dir_offset: The direction register offset. + * @pullen_offset: The pull-up/pull-down enable register offset. + * @pinmux_offset: The pinmux register offset. + * + * @type1_start: Some chips have two base addresses for pull select register, + * that means some pins use the first address and others use the second. This + * member record the start of pin number to use the second address. + * @type1_end: The end of pin number to use the second address. + * + * @port_shf: The shift between two registers. + * @port_mask: The mask of register. + * @port_align: Provide clear register and set register step. + */ +struct mtk_pinctrl_devdata { + const struct mtk_desc_pin *pins; + unsigned int npins; + const struct mtk_drv_group_desc *grp_desc; + unsigned int n_grp_cls; + const struct mtk_pin_drv_grp *pin_drv_grp; + unsigned int n_pin_drv_grps; + int (*spec_pull_set)(struct regmap *reg, unsigned int pin, + unsigned char align, bool isup, unsigned int arg); + unsigned int dir_offset; + unsigned int ies_offset; + unsigned int smt_offset; + unsigned int pullen_offset; + unsigned int pullsel_offset; + unsigned int drv_offset; + unsigned int invser_offset; + unsigned int dout_offset; + unsigned int din_offset; + unsigned int pinmux_offset; + unsigned short type1_start; + unsigned short type1_end; + unsigned char port_shf; + unsigned char port_mask; + unsigned char port_align; +}; + +struct mtk_pinctrl { + struct regmap *regmap1; + struct regmap *regmap2; + struct device *dev; + struct gpio_chip *chip; + struct mtk_pinctrl_group *groups; + unsigned ngroups; + const char **grp_names; + struct pinctrl_dev *pctl_dev; + const struct mtk_pinctrl_devdata *devdata; +}; + +int mtk_pctrl_init(struct platform_device *pdev, + const struct mtk_pinctrl_devdata *data); + +#endif /* __PINCTRL_MTK_COMMON_H */ |