1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * (C) Copyright 2016 - Beniamino Galvani <b.galvani@gmail.com> 4 */ 5 6 #ifndef __PINCTRL_MESON_H__ 7 #define __PINCTRL_MESON_H__ 8 9 #include <linux/types.h> 10 11 struct meson_pmx_group { 12 const char *name; 13 const unsigned int *pins; 14 unsigned int num_pins; 15 bool is_gpio; 16 unsigned int reg; 17 unsigned int bit; 18 }; 19 20 struct meson_pmx_func { 21 const char *name; 22 const char * const *groups; 23 unsigned int num_groups; 24 }; 25 26 struct meson_pinctrl_data { 27 const char *name; 28 struct meson_pmx_group *groups; 29 struct meson_pmx_func *funcs; 30 struct meson_bank *banks; 31 unsigned int pin_base; 32 unsigned int num_pins; 33 unsigned int num_groups; 34 unsigned int num_funcs; 35 unsigned int num_banks; 36 }; 37 38 struct meson_pinctrl { 39 struct meson_pinctrl_data *data; 40 void __iomem *reg_mux; 41 void __iomem *reg_gpio; 42 }; 43 44 /** 45 * struct meson_reg_desc - a register descriptor 46 * 47 * @reg: register offset in the regmap 48 * @bit: bit index in register 49 * 50 * The structure describes the information needed to control pull, 51 * pull-enable, direction, etc. for a single pin 52 */ 53 struct meson_reg_desc { 54 unsigned int reg; 55 unsigned int bit; 56 }; 57 58 /** 59 * enum meson_reg_type - type of registers encoded in @meson_reg_desc 60 */ 61 enum meson_reg_type { 62 REG_PULLEN, 63 REG_PULL, 64 REG_DIR, 65 REG_OUT, 66 REG_IN, 67 NUM_REG, 68 }; 69 70 /** 71 * struct meson bank 72 * 73 * @name: bank name 74 * @first: first pin of the bank 75 * @last: last pin of the bank 76 * @regs: array of register descriptors 77 * 78 * A bank represents a set of pins controlled by a contiguous set of 79 * bits in the domain registers. The structure specifies which bits in 80 * the regmap control the different functionalities. Each member of 81 * the @regs array refers to the first pin of the bank. 82 */ 83 struct meson_bank { 84 const char *name; 85 unsigned int first; 86 unsigned int last; 87 struct meson_reg_desc regs[NUM_REG]; 88 }; 89 90 #define PIN(x, b) (b + x) 91 92 #define GROUP(grp, r, b) \ 93 { \ 94 .name = #grp, \ 95 .pins = grp ## _pins, \ 96 .num_pins = ARRAY_SIZE(grp ## _pins), \ 97 .reg = r, \ 98 .bit = b, \ 99 } 100 101 #define GPIO_GROUP(gpio, b) \ 102 { \ 103 .name = #gpio, \ 104 .pins = (const unsigned int[]){ PIN(gpio, b) }, \ 105 .num_pins = 1, \ 106 .is_gpio = true, \ 107 } 108 109 #define FUNCTION(fn) \ 110 { \ 111 .name = #fn, \ 112 .groups = fn ## _groups, \ 113 .num_groups = ARRAY_SIZE(fn ## _groups), \ 114 } 115 116 #define BANK(n, f, l, per, peb, pr, pb, dr, db, or, ob, ir, ib) \ 117 { \ 118 .name = n, \ 119 .first = f, \ 120 .last = l, \ 121 .regs = { \ 122 [REG_PULLEN] = { per, peb }, \ 123 [REG_PULL] = { pr, pb }, \ 124 [REG_DIR] = { dr, db }, \ 125 [REG_OUT] = { or, ob }, \ 126 [REG_IN] = { ir, ib }, \ 127 }, \ 128 } 129 130 #define MESON_PIN(x, b) PINCTRL_PIN(PIN(x, b), #x) 131 132 extern const struct pinctrl_ops meson_pinctrl_ops; 133 134 int meson_pinctrl_probe(struct udevice *dev); 135 136 #endif /* __PINCTRL_MESON_H__ */ 137