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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 | // SPDX-License-Identifier: GPL-2.0-or-later /* * GPIO Chip driver for Analog Devices * ADP5588/ADP5587 I/O Expander and QWERTY Keypad Controller * * (C) Copyright 2022 - Analog Devices, Inc. * * Written and/or maintained by Timesys Corporation * * Contact: Nathan Barrett-Morrison <nathan.morrison@timesys.com> * Contact: Greg Malysa <greg.malysa@timesys.com> * * Based on Michael Hennerich's Linux driver: * Michael Hennerich <michael.hennerich@analog.com> * */ #include <dm.h> #include <i2c.h> #include <asm-generic/gpio.h> #define ADP5588_MAXGPIO 18 #define ADP5588_BANK(offs) ((offs) >> 3) #define ADP5588_BIT(offs) (1u << ((offs) & 0x7)) #define DEV_ID 0x00 /* Device ID */ #define GPIO_DAT_STAT1 0x14 /* GPIO Data Status, Read twice to clear */ #define GPIO_DAT_STAT2 0x15 /* GPIO Data Status, Read twice to clear */ #define GPIO_DAT_STAT3 0x16 /* GPIO Data Status, Read twice to clear */ #define GPIO_DAT_OUT1 0x17 /* GPIO DATA OUT */ #define GPIO_DAT_OUT2 0x18 /* GPIO DATA OUT */ #define GPIO_DAT_OUT3 0x19 /* GPIO DATA OUT */ #define GPIO_INT_EN1 0x1A /* GPIO Interrupt Enable */ #define GPIO_INT_EN2 0x1B /* GPIO Interrupt Enable */ #define GPIO_INT_EN3 0x1C /* GPIO Interrupt Enable */ #define KP_GPIO1 0x1D /* Keypad or GPIO Selection */ #define KP_GPIO2 0x1E /* Keypad or GPIO Selection */ #define KP_GPIO3 0x1F /* Keypad or GPIO Selection */ #define GPIO_DIR1 0x23 /* GPIO Data Direction */ #define GPIO_DIR2 0x24 /* GPIO Data Direction */ #define GPIO_DIR3 0x25 /* GPIO Data Direction */ #define GPIO_PULL1 0x2C /* GPIO Pull Disable */ #define GPIO_PULL2 0x2D /* GPIO Pull Disable */ #define GPIO_PULL3 0x2E /* GPIO Pull Disable */ #define ID_MASK 0x0F struct adp5588_gpio { u8 dat_out[3]; u8 dir[3]; }; static int adp5588_gpio_read(struct udevice *dev, u8 reg) { int ret; u8 val; ret = dm_i2c_read(dev, reg, &val, 1); if (ret < 0) { pr_err("%s: read error\n", __func__); return ret; } return val; } static int adp5588_gpio_write(struct udevice *dev, u8 reg, u8 val) { int ret; ret = dm_i2c_write(dev, reg, &val, 1); if (ret < 0) { pr_err("%s: write error\n", __func__); return ret; } return 0; } static int adp5588_get_value(struct udevice *dev, u32 offset) { struct adp5588_gpio *plat = dev_get_plat(dev); unsigned int bank = ADP5588_BANK(offset); unsigned int bit = ADP5588_BIT(offset); int val; if (plat->dir[bank] & bit) val = plat->dat_out[bank]; else val = adp5588_gpio_read(dev, GPIO_DAT_STAT1 + bank); return !!(val & bit); } static int adp5588_set_value(struct udevice *dev, u32 offset, int32_t value) { unsigned int bank, bit; int ret; struct adp5588_gpio *plat = dev_get_plat(dev); bank = ADP5588_BANK(offset); bit = ADP5588_BIT(offset); if (value) plat->dat_out[bank] |= bit; else plat->dat_out[bank] &= ~bit; ret = adp5588_gpio_write(dev, GPIO_DAT_OUT1 + bank, plat->dat_out[bank]); return ret; } static int adp5588_direction_input(struct udevice *dev, u32 offset) { int ret; unsigned int bank; struct adp5588_gpio *plat = dev_get_plat(dev); bank = ADP5588_BANK(offset); plat->dir[bank] &= ~ADP5588_BIT(offset); ret = adp5588_gpio_write(dev, GPIO_DIR1 + bank, plat->dir[bank]); return ret; } static int adp5588_direction_output(struct udevice *dev, u32 offset, int value) { int ret; unsigned int bank, bit; struct adp5588_gpio *plat = dev_get_plat(dev); bank = ADP5588_BANK(offset); bit = ADP5588_BIT(offset); plat->dir[bank] |= bit; if (value) plat->dat_out[bank] |= bit; else plat->dat_out[bank] &= ~bit; ret = adp5588_gpio_write(dev, GPIO_DAT_OUT1 + bank, plat->dat_out[bank]); ret |= adp5588_gpio_write(dev, GPIO_DIR1 + bank, plat->dir[bank]); return ret; } static int adp5588_ofdata_platdata(struct udevice *dev) { struct adp5588_gpio *plat = dev_get_plat(dev); struct gpio_dev_priv *priv = dev_get_uclass_priv(dev); int node = dev_of_offset(dev); int ret, i, revid; priv->gpio_count = ADP5588_MAXGPIO; priv->bank_name = fdt_get_name(gd->fdt_blob, node, NULL); ret = adp5588_gpio_read(dev, DEV_ID); if (ret < 0) return ret; revid = ret & ID_MASK; printf("ADP5588 Detected: Rev %x, Rev ID %x\n", ret, revid); for (i = 0, ret = 0; i <= ADP5588_BANK(ADP5588_MAXGPIO); i++) { plat->dat_out[i] = adp5588_gpio_read(dev, GPIO_DAT_OUT1 + i); plat->dir[i] = adp5588_gpio_read(dev, GPIO_DIR1 + i); ret |= adp5588_gpio_write(dev, KP_GPIO1 + i, 0); ret |= adp5588_gpio_write(dev, GPIO_PULL1 + i, 0); ret |= adp5588_gpio_write(dev, GPIO_INT_EN1 + i, 0); if (ret) { pr_err("%s: Initialization error\n", __func__); return ret; } } return 0; } static const struct dm_gpio_ops adp5588_ops = { .direction_input = adp5588_direction_input, .direction_output = adp5588_direction_output, .get_value = adp5588_get_value, .set_value = adp5588_set_value, }; static const struct udevice_id adp5588_of_match_list[] = { { .compatible = "adi,adp5588"}, { /* sentinel */ } }; U_BOOT_DRIVER(gpio_adp5588) = { .name = "gpio_adp5588", .id = UCLASS_GPIO, .ops = &adp5588_ops, .of_match = adp5588_of_match_list, .of_to_plat = adp5588_ofdata_platdata, .plat_auto = sizeof(struct adp5588_gpio), .flags = DM_FLAG_PRE_RELOC, }; |