eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 1 | /* |
Aaron Sierra | 1e19169 | 2014-02-07 16:35:48 -0600 | [diff] [blame] | 2 | * PCA953x 4/8/16/24/40 bit I/O ports |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2005 Ben Gardner <bgardner@wabtec.com> |
| 5 | * Copyright (C) 2007 Marvell International Ltd. |
| 6 | * |
| 7 | * Derived from drivers/i2c/chips/pca9539.c |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; version 2 of the License. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/init.h> |
H Hartley Sweeten | d120c17 | 2009-09-22 16:46:37 -0700 | [diff] [blame] | 16 | #include <linux/gpio.h> |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 17 | #include <linux/interrupt.h> |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 18 | #include <linux/i2c.h> |
Vivien Didelot | 5877457 | 2013-08-29 15:24:14 -0400 | [diff] [blame] | 19 | #include <linux/platform_data/pca953x.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 20 | #include <linux/slab.h> |
Nate Case | 1965d30 | 2009-06-17 16:26:17 -0700 | [diff] [blame] | 21 | #include <linux/of_platform.h> |
Andy Shevchenko | f32517b | 2015-10-01 14:20:28 +0300 | [diff] [blame] | 22 | #include <linux/acpi.h> |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 23 | |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 24 | #define PCA953X_INPUT 0 |
| 25 | #define PCA953X_OUTPUT 1 |
| 26 | #define PCA953X_INVERT 2 |
| 27 | #define PCA953X_DIRECTION 3 |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 28 | |
Andreas Schallenberg | ae79c19 | 2012-05-09 09:46:17 +0200 | [diff] [blame] | 29 | #define REG_ADDR_AI 0x80 |
| 30 | |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 31 | #define PCA957X_IN 0 |
| 32 | #define PCA957X_INVRT 1 |
| 33 | #define PCA957X_BKEN 2 |
| 34 | #define PCA957X_PUPD 3 |
| 35 | #define PCA957X_CFG 4 |
| 36 | #define PCA957X_OUT 5 |
| 37 | #define PCA957X_MSK 6 |
| 38 | #define PCA957X_INTS 7 |
| 39 | |
Yong Li | 44896be | 2016-04-07 12:56:32 +0800 | [diff] [blame^] | 40 | #define PCAL953X_IN_LATCH 34 |
| 41 | #define PCAL953X_INT_MASK 37 |
| 42 | #define PCAL953X_INT_STAT 38 |
| 43 | |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 44 | #define PCA_GPIO_MASK 0x00FF |
| 45 | #define PCA_INT 0x0100 |
Yong Li | 44896be | 2016-04-07 12:56:32 +0800 | [diff] [blame^] | 46 | #define PCA_PCAL 0x0200 |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 47 | #define PCA953X_TYPE 0x1000 |
| 48 | #define PCA957X_TYPE 0x2000 |
Andy Shevchenko | c666414 | 2015-10-01 14:20:27 +0300 | [diff] [blame] | 49 | #define PCA_TYPE_MASK 0xF000 |
| 50 | |
| 51 | #define PCA_CHIP_TYPE(x) ((x) & PCA_TYPE_MASK) |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 52 | |
Jean Delvare | 3760f73 | 2008-04-29 23:11:40 +0200 | [diff] [blame] | 53 | static const struct i2c_device_id pca953x_id[] = { |
Gregory CLEMENT | 89f5df0 | 2013-01-22 22:10:24 +0100 | [diff] [blame] | 54 | { "pca9505", 40 | PCA953X_TYPE | PCA_INT, }, |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 55 | { "pca9534", 8 | PCA953X_TYPE | PCA_INT, }, |
| 56 | { "pca9535", 16 | PCA953X_TYPE | PCA_INT, }, |
| 57 | { "pca9536", 4 | PCA953X_TYPE, }, |
| 58 | { "pca9537", 4 | PCA953X_TYPE | PCA_INT, }, |
| 59 | { "pca9538", 8 | PCA953X_TYPE | PCA_INT, }, |
| 60 | { "pca9539", 16 | PCA953X_TYPE | PCA_INT, }, |
| 61 | { "pca9554", 8 | PCA953X_TYPE | PCA_INT, }, |
| 62 | { "pca9555", 16 | PCA953X_TYPE | PCA_INT, }, |
| 63 | { "pca9556", 8 | PCA953X_TYPE, }, |
| 64 | { "pca9557", 8 | PCA953X_TYPE, }, |
| 65 | { "pca9574", 8 | PCA957X_TYPE | PCA_INT, }, |
| 66 | { "pca9575", 16 | PCA957X_TYPE | PCA_INT, }, |
Aaron Sierra | eb32b5a | 2014-02-13 13:59:23 +0100 | [diff] [blame] | 67 | { "pca9698", 40 | PCA953X_TYPE, }, |
David Brownell | ab5dc37 | 2009-01-06 14:42:27 -0800 | [diff] [blame] | 68 | |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 69 | { "max7310", 8 | PCA953X_TYPE, }, |
| 70 | { "max7312", 16 | PCA953X_TYPE | PCA_INT, }, |
| 71 | { "max7313", 16 | PCA953X_TYPE | PCA_INT, }, |
| 72 | { "max7315", 8 | PCA953X_TYPE | PCA_INT, }, |
| 73 | { "pca6107", 8 | PCA953X_TYPE | PCA_INT, }, |
| 74 | { "tca6408", 8 | PCA953X_TYPE | PCA_INT, }, |
| 75 | { "tca6416", 16 | PCA953X_TYPE | PCA_INT, }, |
Andreas Schallenberg | ae79c19 | 2012-05-09 09:46:17 +0200 | [diff] [blame] | 76 | { "tca6424", 24 | PCA953X_TYPE | PCA_INT, }, |
Thierry Reding | 2db8aba | 2015-09-29 12:55:44 +0200 | [diff] [blame] | 77 | { "tca9539", 16 | PCA953X_TYPE | PCA_INT, }, |
Aaron Sierra | e73760a | 2014-02-07 16:36:21 -0600 | [diff] [blame] | 78 | { "xra1202", 8 | PCA953X_TYPE }, |
Jean Delvare | 3760f73 | 2008-04-29 23:11:40 +0200 | [diff] [blame] | 79 | { } |
Guennadi Liakhovetski | f5e8ff4 | 2008-02-06 01:39:04 -0800 | [diff] [blame] | 80 | }; |
Jean Delvare | 3760f73 | 2008-04-29 23:11:40 +0200 | [diff] [blame] | 81 | MODULE_DEVICE_TABLE(i2c, pca953x_id); |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 82 | |
Andy Shevchenko | f32517b | 2015-10-01 14:20:28 +0300 | [diff] [blame] | 83 | static const struct acpi_device_id pca953x_acpi_ids[] = { |
Yong Li | 44896be | 2016-04-07 12:56:32 +0800 | [diff] [blame^] | 84 | { "INT3491", 16 | PCA953X_TYPE | PCA_INT | PCA_PCAL, }, |
Andy Shevchenko | f32517b | 2015-10-01 14:20:28 +0300 | [diff] [blame] | 85 | { } |
| 86 | }; |
| 87 | MODULE_DEVICE_TABLE(acpi, pca953x_acpi_ids); |
| 88 | |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 89 | #define MAX_BANK 5 |
| 90 | #define BANK_SZ 8 |
| 91 | |
| 92 | #define NBANK(chip) (chip->gpio_chip.ngpio / BANK_SZ) |
| 93 | |
Guennadi Liakhovetski | f3dc363 | 2008-02-06 01:39:03 -0800 | [diff] [blame] | 94 | struct pca953x_chip { |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 95 | unsigned gpio_start; |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 96 | u8 reg_output[MAX_BANK]; |
| 97 | u8 reg_direction[MAX_BANK]; |
Roland Stigge | 6e20fb1 | 2011-02-10 15:01:23 -0800 | [diff] [blame] | 98 | struct mutex i2c_lock; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 99 | |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 100 | #ifdef CONFIG_GPIO_PCA953X_IRQ |
| 101 | struct mutex irq_lock; |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 102 | u8 irq_mask[MAX_BANK]; |
| 103 | u8 irq_stat[MAX_BANK]; |
| 104 | u8 irq_trig_raise[MAX_BANK]; |
| 105 | u8 irq_trig_fall[MAX_BANK]; |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 106 | #endif |
| 107 | |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 108 | struct i2c_client *client; |
| 109 | struct gpio_chip gpio_chip; |
Uwe Kleine-König | 6215499 | 2010-05-26 14:42:17 -0700 | [diff] [blame] | 110 | const char *const *names; |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 111 | int chip_type; |
Andy Shevchenko | c666414 | 2015-10-01 14:20:27 +0300 | [diff] [blame] | 112 | unsigned long driver_data; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 113 | }; |
| 114 | |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 115 | static int pca953x_read_single(struct pca953x_chip *chip, int reg, u32 *val, |
| 116 | int off) |
| 117 | { |
| 118 | int ret; |
| 119 | int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ); |
| 120 | int offset = off / BANK_SZ; |
| 121 | |
| 122 | ret = i2c_smbus_read_byte_data(chip->client, |
| 123 | (reg << bank_shift) + offset); |
| 124 | *val = ret; |
| 125 | |
| 126 | if (ret < 0) { |
| 127 | dev_err(&chip->client->dev, "failed reading register\n"); |
| 128 | return ret; |
| 129 | } |
| 130 | |
| 131 | return 0; |
| 132 | } |
| 133 | |
| 134 | static int pca953x_write_single(struct pca953x_chip *chip, int reg, u32 val, |
| 135 | int off) |
| 136 | { |
| 137 | int ret = 0; |
| 138 | int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ); |
| 139 | int offset = off / BANK_SZ; |
| 140 | |
| 141 | ret = i2c_smbus_write_byte_data(chip->client, |
| 142 | (reg << bank_shift) + offset, val); |
| 143 | |
| 144 | if (ret < 0) { |
| 145 | dev_err(&chip->client->dev, "failed writing register\n"); |
| 146 | return ret; |
| 147 | } |
| 148 | |
| 149 | return 0; |
| 150 | } |
| 151 | |
| 152 | static int pca953x_write_regs(struct pca953x_chip *chip, int reg, u8 *val) |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 153 | { |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 154 | int ret = 0; |
Guennadi Liakhovetski | f5e8ff4 | 2008-02-06 01:39:04 -0800 | [diff] [blame] | 155 | |
| 156 | if (chip->gpio_chip.ngpio <= 8) |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 157 | ret = i2c_smbus_write_byte_data(chip->client, reg, *val); |
| 158 | else if (chip->gpio_chip.ngpio >= 24) { |
| 159 | int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ); |
Andreas Schallenberg | 96b7064 | 2012-05-21 09:52:43 +0200 | [diff] [blame] | 160 | ret = i2c_smbus_write_i2c_block_data(chip->client, |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 161 | (reg << bank_shift) | REG_ADDR_AI, |
| 162 | NBANK(chip), val); |
Laurent Navet | 50e4443 | 2013-03-20 13:15:58 +0100 | [diff] [blame] | 163 | } else { |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 164 | switch (chip->chip_type) { |
| 165 | case PCA953X_TYPE: |
| 166 | ret = i2c_smbus_write_word_data(chip->client, |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 167 | reg << 1, (u16) *val); |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 168 | break; |
| 169 | case PCA957X_TYPE: |
| 170 | ret = i2c_smbus_write_byte_data(chip->client, reg << 1, |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 171 | val[0]); |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 172 | if (ret < 0) |
| 173 | break; |
| 174 | ret = i2c_smbus_write_byte_data(chip->client, |
| 175 | (reg << 1) + 1, |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 176 | val[1]); |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 177 | break; |
| 178 | } |
| 179 | } |
Guennadi Liakhovetski | f5e8ff4 | 2008-02-06 01:39:04 -0800 | [diff] [blame] | 180 | |
| 181 | if (ret < 0) { |
| 182 | dev_err(&chip->client->dev, "failed writing register\n"); |
David Brownell | ab5dc37 | 2009-01-06 14:42:27 -0800 | [diff] [blame] | 183 | return ret; |
Guennadi Liakhovetski | f5e8ff4 | 2008-02-06 01:39:04 -0800 | [diff] [blame] | 184 | } |
| 185 | |
| 186 | return 0; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 187 | } |
| 188 | |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 189 | static int pca953x_read_regs(struct pca953x_chip *chip, int reg, u8 *val) |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 190 | { |
| 191 | int ret; |
| 192 | |
Andreas Schallenberg | 96b7064 | 2012-05-21 09:52:43 +0200 | [diff] [blame] | 193 | if (chip->gpio_chip.ngpio <= 8) { |
Guennadi Liakhovetski | f5e8ff4 | 2008-02-06 01:39:04 -0800 | [diff] [blame] | 194 | ret = i2c_smbus_read_byte_data(chip->client, reg); |
Andreas Schallenberg | 96b7064 | 2012-05-21 09:52:43 +0200 | [diff] [blame] | 195 | *val = ret; |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 196 | } else if (chip->gpio_chip.ngpio >= 24) { |
| 197 | int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ); |
| 198 | |
Andreas Schallenberg | 96b7064 | 2012-05-21 09:52:43 +0200 | [diff] [blame] | 199 | ret = i2c_smbus_read_i2c_block_data(chip->client, |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 200 | (reg << bank_shift) | REG_ADDR_AI, |
| 201 | NBANK(chip), val); |
Andreas Schallenberg | 96b7064 | 2012-05-21 09:52:43 +0200 | [diff] [blame] | 202 | } else { |
Guennadi Liakhovetski | f5e8ff4 | 2008-02-06 01:39:04 -0800 | [diff] [blame] | 203 | ret = i2c_smbus_read_word_data(chip->client, reg << 1); |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 204 | val[0] = (u16)ret & 0xFF; |
| 205 | val[1] = (u16)ret >> 8; |
Andreas Schallenberg | 96b7064 | 2012-05-21 09:52:43 +0200 | [diff] [blame] | 206 | } |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 207 | if (ret < 0) { |
| 208 | dev_err(&chip->client->dev, "failed reading register\n"); |
David Brownell | ab5dc37 | 2009-01-06 14:42:27 -0800 | [diff] [blame] | 209 | return ret; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 210 | } |
| 211 | |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 212 | return 0; |
| 213 | } |
| 214 | |
Guennadi Liakhovetski | f3dc363 | 2008-02-06 01:39:03 -0800 | [diff] [blame] | 215 | static int pca953x_gpio_direction_input(struct gpio_chip *gc, unsigned off) |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 216 | { |
Linus Walleij | 468e67f | 2015-12-07 11:20:54 +0100 | [diff] [blame] | 217 | struct pca953x_chip *chip = gpiochip_get_data(gc); |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 218 | u8 reg_val; |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 219 | int ret, offset = 0; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 220 | |
Roland Stigge | 6e20fb1 | 2011-02-10 15:01:23 -0800 | [diff] [blame] | 221 | mutex_lock(&chip->i2c_lock); |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 222 | reg_val = chip->reg_direction[off / BANK_SZ] | (1u << (off % BANK_SZ)); |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 223 | |
| 224 | switch (chip->chip_type) { |
| 225 | case PCA953X_TYPE: |
| 226 | offset = PCA953X_DIRECTION; |
| 227 | break; |
| 228 | case PCA957X_TYPE: |
| 229 | offset = PCA957X_CFG; |
| 230 | break; |
| 231 | } |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 232 | ret = pca953x_write_single(chip, offset, reg_val, off); |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 233 | if (ret) |
Roland Stigge | 6e20fb1 | 2011-02-10 15:01:23 -0800 | [diff] [blame] | 234 | goto exit; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 235 | |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 236 | chip->reg_direction[off / BANK_SZ] = reg_val; |
Roland Stigge | 6e20fb1 | 2011-02-10 15:01:23 -0800 | [diff] [blame] | 237 | ret = 0; |
| 238 | exit: |
| 239 | mutex_unlock(&chip->i2c_lock); |
| 240 | return ret; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 241 | } |
| 242 | |
Guennadi Liakhovetski | f3dc363 | 2008-02-06 01:39:03 -0800 | [diff] [blame] | 243 | static int pca953x_gpio_direction_output(struct gpio_chip *gc, |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 244 | unsigned off, int val) |
| 245 | { |
Linus Walleij | 468e67f | 2015-12-07 11:20:54 +0100 | [diff] [blame] | 246 | struct pca953x_chip *chip = gpiochip_get_data(gc); |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 247 | u8 reg_val; |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 248 | int ret, offset = 0; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 249 | |
Roland Stigge | 6e20fb1 | 2011-02-10 15:01:23 -0800 | [diff] [blame] | 250 | mutex_lock(&chip->i2c_lock); |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 251 | /* set output level */ |
| 252 | if (val) |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 253 | reg_val = chip->reg_output[off / BANK_SZ] |
| 254 | | (1u << (off % BANK_SZ)); |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 255 | else |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 256 | reg_val = chip->reg_output[off / BANK_SZ] |
| 257 | & ~(1u << (off % BANK_SZ)); |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 258 | |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 259 | switch (chip->chip_type) { |
| 260 | case PCA953X_TYPE: |
| 261 | offset = PCA953X_OUTPUT; |
| 262 | break; |
| 263 | case PCA957X_TYPE: |
| 264 | offset = PCA957X_OUT; |
| 265 | break; |
| 266 | } |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 267 | ret = pca953x_write_single(chip, offset, reg_val, off); |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 268 | if (ret) |
Roland Stigge | 6e20fb1 | 2011-02-10 15:01:23 -0800 | [diff] [blame] | 269 | goto exit; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 270 | |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 271 | chip->reg_output[off / BANK_SZ] = reg_val; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 272 | |
| 273 | /* then direction */ |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 274 | reg_val = chip->reg_direction[off / BANK_SZ] & ~(1u << (off % BANK_SZ)); |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 275 | switch (chip->chip_type) { |
| 276 | case PCA953X_TYPE: |
| 277 | offset = PCA953X_DIRECTION; |
| 278 | break; |
| 279 | case PCA957X_TYPE: |
| 280 | offset = PCA957X_CFG; |
| 281 | break; |
| 282 | } |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 283 | ret = pca953x_write_single(chip, offset, reg_val, off); |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 284 | if (ret) |
Roland Stigge | 6e20fb1 | 2011-02-10 15:01:23 -0800 | [diff] [blame] | 285 | goto exit; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 286 | |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 287 | chip->reg_direction[off / BANK_SZ] = reg_val; |
Roland Stigge | 6e20fb1 | 2011-02-10 15:01:23 -0800 | [diff] [blame] | 288 | ret = 0; |
| 289 | exit: |
| 290 | mutex_unlock(&chip->i2c_lock); |
| 291 | return ret; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 292 | } |
| 293 | |
Guennadi Liakhovetski | f3dc363 | 2008-02-06 01:39:03 -0800 | [diff] [blame] | 294 | static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off) |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 295 | { |
Linus Walleij | 468e67f | 2015-12-07 11:20:54 +0100 | [diff] [blame] | 296 | struct pca953x_chip *chip = gpiochip_get_data(gc); |
Andreas Schallenberg | ae79c19 | 2012-05-09 09:46:17 +0200 | [diff] [blame] | 297 | u32 reg_val; |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 298 | int ret, offset = 0; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 299 | |
Roland Stigge | 6e20fb1 | 2011-02-10 15:01:23 -0800 | [diff] [blame] | 300 | mutex_lock(&chip->i2c_lock); |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 301 | switch (chip->chip_type) { |
| 302 | case PCA953X_TYPE: |
| 303 | offset = PCA953X_INPUT; |
| 304 | break; |
| 305 | case PCA957X_TYPE: |
| 306 | offset = PCA957X_IN; |
| 307 | break; |
| 308 | } |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 309 | ret = pca953x_read_single(chip, offset, ®_val, off); |
Roland Stigge | 6e20fb1 | 2011-02-10 15:01:23 -0800 | [diff] [blame] | 310 | mutex_unlock(&chip->i2c_lock); |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 311 | if (ret < 0) { |
| 312 | /* NOTE: diagnostic already emitted; that's all we should |
| 313 | * do unless gpio_*_value_cansleep() calls become different |
| 314 | * from their nonsleeping siblings (and report faults). |
| 315 | */ |
| 316 | return 0; |
| 317 | } |
| 318 | |
Andrew Ruder | 40a625d | 2013-08-07 16:52:40 -0500 | [diff] [blame] | 319 | return (reg_val & (1u << (off % BANK_SZ))) ? 1 : 0; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 320 | } |
| 321 | |
Guennadi Liakhovetski | f3dc363 | 2008-02-06 01:39:03 -0800 | [diff] [blame] | 322 | static void pca953x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val) |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 323 | { |
Linus Walleij | 468e67f | 2015-12-07 11:20:54 +0100 | [diff] [blame] | 324 | struct pca953x_chip *chip = gpiochip_get_data(gc); |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 325 | u8 reg_val; |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 326 | int ret, offset = 0; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 327 | |
Roland Stigge | 6e20fb1 | 2011-02-10 15:01:23 -0800 | [diff] [blame] | 328 | mutex_lock(&chip->i2c_lock); |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 329 | if (val) |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 330 | reg_val = chip->reg_output[off / BANK_SZ] |
| 331 | | (1u << (off % BANK_SZ)); |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 332 | else |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 333 | reg_val = chip->reg_output[off / BANK_SZ] |
| 334 | & ~(1u << (off % BANK_SZ)); |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 335 | |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 336 | switch (chip->chip_type) { |
| 337 | case PCA953X_TYPE: |
| 338 | offset = PCA953X_OUTPUT; |
| 339 | break; |
| 340 | case PCA957X_TYPE: |
| 341 | offset = PCA957X_OUT; |
| 342 | break; |
| 343 | } |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 344 | ret = pca953x_write_single(chip, offset, reg_val, off); |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 345 | if (ret) |
Roland Stigge | 6e20fb1 | 2011-02-10 15:01:23 -0800 | [diff] [blame] | 346 | goto exit; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 347 | |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 348 | chip->reg_output[off / BANK_SZ] = reg_val; |
Roland Stigge | 6e20fb1 | 2011-02-10 15:01:23 -0800 | [diff] [blame] | 349 | exit: |
| 350 | mutex_unlock(&chip->i2c_lock); |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 351 | } |
| 352 | |
Phil Reid | b4818af | 2015-12-04 15:52:30 +0800 | [diff] [blame] | 353 | |
| 354 | static void pca953x_gpio_set_multiple(struct gpio_chip *gc, |
| 355 | unsigned long *mask, unsigned long *bits) |
| 356 | { |
Linus Walleij | 468e67f | 2015-12-07 11:20:54 +0100 | [diff] [blame] | 357 | struct pca953x_chip *chip = gpiochip_get_data(gc); |
Phil Reid | b4818af | 2015-12-04 15:52:30 +0800 | [diff] [blame] | 358 | u8 reg_val[MAX_BANK]; |
| 359 | int ret, offset = 0; |
| 360 | int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ); |
| 361 | int bank; |
| 362 | |
| 363 | switch (chip->chip_type) { |
| 364 | case PCA953X_TYPE: |
| 365 | offset = PCA953X_OUTPUT; |
| 366 | break; |
| 367 | case PCA957X_TYPE: |
| 368 | offset = PCA957X_OUT; |
| 369 | break; |
| 370 | } |
| 371 | |
| 372 | memcpy(reg_val, chip->reg_output, NBANK(chip)); |
| 373 | mutex_lock(&chip->i2c_lock); |
| 374 | for(bank=0; bank<NBANK(chip); bank++) { |
Geert Uytterhoeven | e0a8604 | 2016-03-11 17:31:27 +0100 | [diff] [blame] | 375 | unsigned bankmask = mask[bank / sizeof(*mask)] >> |
| 376 | ((bank % sizeof(*mask)) * 8); |
Phil Reid | b4818af | 2015-12-04 15:52:30 +0800 | [diff] [blame] | 377 | if(bankmask) { |
Geert Uytterhoeven | e0a8604 | 2016-03-11 17:31:27 +0100 | [diff] [blame] | 378 | unsigned bankval = bits[bank / sizeof(*bits)] >> |
| 379 | ((bank % sizeof(*bits)) * 8); |
Phil Reid | b4818af | 2015-12-04 15:52:30 +0800 | [diff] [blame] | 380 | reg_val[bank] = (reg_val[bank] & ~bankmask) | bankval; |
| 381 | } |
| 382 | } |
| 383 | ret = i2c_smbus_write_i2c_block_data(chip->client, offset << bank_shift, NBANK(chip), reg_val); |
| 384 | if (ret) |
| 385 | goto exit; |
| 386 | |
| 387 | memcpy(chip->reg_output, reg_val, NBANK(chip)); |
| 388 | exit: |
| 389 | mutex_unlock(&chip->i2c_lock); |
| 390 | } |
| 391 | |
Guennadi Liakhovetski | f5e8ff4 | 2008-02-06 01:39:04 -0800 | [diff] [blame] | 392 | static void pca953x_setup_gpio(struct pca953x_chip *chip, int gpios) |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 393 | { |
| 394 | struct gpio_chip *gc; |
| 395 | |
| 396 | gc = &chip->gpio_chip; |
| 397 | |
Guennadi Liakhovetski | f3dc363 | 2008-02-06 01:39:03 -0800 | [diff] [blame] | 398 | gc->direction_input = pca953x_gpio_direction_input; |
| 399 | gc->direction_output = pca953x_gpio_direction_output; |
| 400 | gc->get = pca953x_gpio_get_value; |
| 401 | gc->set = pca953x_gpio_set_value; |
Phil Reid | b4818af | 2015-12-04 15:52:30 +0800 | [diff] [blame] | 402 | gc->set_multiple = pca953x_gpio_set_multiple; |
Linus Walleij | 9fb1f39 | 2013-12-04 14:42:46 +0100 | [diff] [blame] | 403 | gc->can_sleep = true; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 404 | |
| 405 | gc->base = chip->gpio_start; |
Guennadi Liakhovetski | f5e8ff4 | 2008-02-06 01:39:04 -0800 | [diff] [blame] | 406 | gc->ngpio = gpios; |
| 407 | gc->label = chip->client->name; |
Linus Walleij | 58383c7 | 2015-11-04 09:56:26 +0100 | [diff] [blame] | 408 | gc->parent = &chip->client->dev; |
Guennadi Liakhovetski | d72cbed | 2008-04-28 02:14:45 -0700 | [diff] [blame] | 409 | gc->owner = THIS_MODULE; |
Daniel Silverstone | 77906a54 | 2009-06-17 16:26:15 -0700 | [diff] [blame] | 410 | gc->names = chip->names; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 411 | } |
| 412 | |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 413 | #ifdef CONFIG_GPIO_PCA953X_IRQ |
Lennert Buytenhek | 6f5cfc0 | 2011-01-12 17:00:15 -0800 | [diff] [blame] | 414 | static void pca953x_irq_mask(struct irq_data *d) |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 415 | { |
Linus Walleij | 7bcbce5 | 2014-05-09 13:27:57 +0200 | [diff] [blame] | 416 | struct gpio_chip *gc = irq_data_get_irq_chip_data(d); |
Linus Walleij | 468e67f | 2015-12-07 11:20:54 +0100 | [diff] [blame] | 417 | struct pca953x_chip *chip = gpiochip_get_data(gc); |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 418 | |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 419 | chip->irq_mask[d->hwirq / BANK_SZ] &= ~(1 << (d->hwirq % BANK_SZ)); |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 420 | } |
| 421 | |
Lennert Buytenhek | 6f5cfc0 | 2011-01-12 17:00:15 -0800 | [diff] [blame] | 422 | static void pca953x_irq_unmask(struct irq_data *d) |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 423 | { |
Linus Walleij | 7bcbce5 | 2014-05-09 13:27:57 +0200 | [diff] [blame] | 424 | struct gpio_chip *gc = irq_data_get_irq_chip_data(d); |
Linus Walleij | 468e67f | 2015-12-07 11:20:54 +0100 | [diff] [blame] | 425 | struct pca953x_chip *chip = gpiochip_get_data(gc); |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 426 | |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 427 | chip->irq_mask[d->hwirq / BANK_SZ] |= 1 << (d->hwirq % BANK_SZ); |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 428 | } |
| 429 | |
Lennert Buytenhek | 6f5cfc0 | 2011-01-12 17:00:15 -0800 | [diff] [blame] | 430 | static void pca953x_irq_bus_lock(struct irq_data *d) |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 431 | { |
Linus Walleij | 7bcbce5 | 2014-05-09 13:27:57 +0200 | [diff] [blame] | 432 | struct gpio_chip *gc = irq_data_get_irq_chip_data(d); |
Linus Walleij | 468e67f | 2015-12-07 11:20:54 +0100 | [diff] [blame] | 433 | struct pca953x_chip *chip = gpiochip_get_data(gc); |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 434 | |
| 435 | mutex_lock(&chip->irq_lock); |
| 436 | } |
| 437 | |
Lennert Buytenhek | 6f5cfc0 | 2011-01-12 17:00:15 -0800 | [diff] [blame] | 438 | static void pca953x_irq_bus_sync_unlock(struct irq_data *d) |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 439 | { |
Linus Walleij | 7bcbce5 | 2014-05-09 13:27:57 +0200 | [diff] [blame] | 440 | struct gpio_chip *gc = irq_data_get_irq_chip_data(d); |
Linus Walleij | 468e67f | 2015-12-07 11:20:54 +0100 | [diff] [blame] | 441 | struct pca953x_chip *chip = gpiochip_get_data(gc); |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 442 | u8 new_irqs; |
| 443 | int level, i; |
Yong Li | 44896be | 2016-04-07 12:56:32 +0800 | [diff] [blame^] | 444 | u8 invert_irq_mask[MAX_BANK]; |
| 445 | |
| 446 | if (chip->driver_data & PCA_PCAL) { |
| 447 | /* Enable latch on interrupt-enabled inputs */ |
| 448 | pca953x_write_regs(chip, PCAL953X_IN_LATCH, chip->irq_mask); |
| 449 | |
| 450 | for (i = 0; i < NBANK(chip); i++) |
| 451 | invert_irq_mask[i] = ~chip->irq_mask[i]; |
| 452 | |
| 453 | /* Unmask enabled interrupts */ |
| 454 | pca953x_write_regs(chip, PCAL953X_INT_MASK, invert_irq_mask); |
| 455 | } |
Marc Zyngier | a2cb9ae | 2010-04-27 13:13:07 -0700 | [diff] [blame] | 456 | |
| 457 | /* Look for any newly setup interrupt */ |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 458 | for (i = 0; i < NBANK(chip); i++) { |
| 459 | new_irqs = chip->irq_trig_fall[i] | chip->irq_trig_raise[i]; |
| 460 | new_irqs &= ~chip->reg_direction[i]; |
Marc Zyngier | a2cb9ae | 2010-04-27 13:13:07 -0700 | [diff] [blame] | 461 | |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 462 | while (new_irqs) { |
| 463 | level = __ffs(new_irqs); |
| 464 | pca953x_gpio_direction_input(&chip->gpio_chip, |
| 465 | level + (BANK_SZ * i)); |
| 466 | new_irqs &= ~(1 << level); |
| 467 | } |
Marc Zyngier | a2cb9ae | 2010-04-27 13:13:07 -0700 | [diff] [blame] | 468 | } |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 469 | |
| 470 | mutex_unlock(&chip->irq_lock); |
| 471 | } |
| 472 | |
Lennert Buytenhek | 6f5cfc0 | 2011-01-12 17:00:15 -0800 | [diff] [blame] | 473 | static int pca953x_irq_set_type(struct irq_data *d, unsigned int type) |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 474 | { |
Linus Walleij | 7bcbce5 | 2014-05-09 13:27:57 +0200 | [diff] [blame] | 475 | struct gpio_chip *gc = irq_data_get_irq_chip_data(d); |
Linus Walleij | 468e67f | 2015-12-07 11:20:54 +0100 | [diff] [blame] | 476 | struct pca953x_chip *chip = gpiochip_get_data(gc); |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 477 | int bank_nb = d->hwirq / BANK_SZ; |
| 478 | u8 mask = 1 << (d->hwirq % BANK_SZ); |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 479 | |
| 480 | if (!(type & IRQ_TYPE_EDGE_BOTH)) { |
| 481 | dev_err(&chip->client->dev, "irq %d: unsupported type %d\n", |
Lennert Buytenhek | 6f5cfc0 | 2011-01-12 17:00:15 -0800 | [diff] [blame] | 482 | d->irq, type); |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 483 | return -EINVAL; |
| 484 | } |
| 485 | |
| 486 | if (type & IRQ_TYPE_EDGE_FALLING) |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 487 | chip->irq_trig_fall[bank_nb] |= mask; |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 488 | else |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 489 | chip->irq_trig_fall[bank_nb] &= ~mask; |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 490 | |
| 491 | if (type & IRQ_TYPE_EDGE_RISING) |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 492 | chip->irq_trig_raise[bank_nb] |= mask; |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 493 | else |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 494 | chip->irq_trig_raise[bank_nb] &= ~mask; |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 495 | |
Marc Zyngier | a2cb9ae | 2010-04-27 13:13:07 -0700 | [diff] [blame] | 496 | return 0; |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 497 | } |
| 498 | |
| 499 | static struct irq_chip pca953x_irq_chip = { |
| 500 | .name = "pca953x", |
Lennert Buytenhek | 6f5cfc0 | 2011-01-12 17:00:15 -0800 | [diff] [blame] | 501 | .irq_mask = pca953x_irq_mask, |
| 502 | .irq_unmask = pca953x_irq_unmask, |
| 503 | .irq_bus_lock = pca953x_irq_bus_lock, |
| 504 | .irq_bus_sync_unlock = pca953x_irq_bus_sync_unlock, |
| 505 | .irq_set_type = pca953x_irq_set_type, |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 506 | }; |
| 507 | |
Joshua Scott | b6ac128 | 2015-05-22 12:35:12 +1200 | [diff] [blame] | 508 | static bool pca953x_irq_pending(struct pca953x_chip *chip, u8 *pending) |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 509 | { |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 510 | u8 cur_stat[MAX_BANK]; |
| 511 | u8 old_stat[MAX_BANK]; |
Joshua Scott | b6ac128 | 2015-05-22 12:35:12 +1200 | [diff] [blame] | 512 | bool pending_seen = false; |
| 513 | bool trigger_seen = false; |
| 514 | u8 trigger[MAX_BANK]; |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 515 | int ret, i, offset = 0; |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 516 | |
Yong Li | 44896be | 2016-04-07 12:56:32 +0800 | [diff] [blame^] | 517 | if (chip->driver_data & PCA_PCAL) { |
| 518 | /* Read the current interrupt status from the device */ |
| 519 | ret = pca953x_read_regs(chip, PCAL953X_INT_STAT, trigger); |
| 520 | if (ret) |
| 521 | return false; |
| 522 | |
| 523 | /* Check latched inputs and clear interrupt status */ |
| 524 | ret = pca953x_read_regs(chip, PCA953X_INPUT, cur_stat); |
| 525 | if (ret) |
| 526 | return false; |
| 527 | |
| 528 | for (i = 0; i < NBANK(chip); i++) { |
| 529 | /* Apply filter for rising/falling edge selection */ |
| 530 | pending[i] = (~cur_stat[i] & chip->irq_trig_fall[i]) | |
| 531 | (cur_stat[i] & chip->irq_trig_raise[i]); |
| 532 | pending[i] &= trigger[i]; |
| 533 | if (pending[i]) |
| 534 | pending_seen = true; |
| 535 | } |
| 536 | |
| 537 | return pending_seen; |
| 538 | } |
| 539 | |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 540 | switch (chip->chip_type) { |
| 541 | case PCA953X_TYPE: |
| 542 | offset = PCA953X_INPUT; |
| 543 | break; |
| 544 | case PCA957X_TYPE: |
| 545 | offset = PCA957X_IN; |
| 546 | break; |
| 547 | } |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 548 | ret = pca953x_read_regs(chip, offset, cur_stat); |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 549 | if (ret) |
Joshua Scott | b6ac128 | 2015-05-22 12:35:12 +1200 | [diff] [blame] | 550 | return false; |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 551 | |
| 552 | /* Remove output pins from the equation */ |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 553 | for (i = 0; i < NBANK(chip); i++) |
| 554 | cur_stat[i] &= chip->reg_direction[i]; |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 555 | |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 556 | memcpy(old_stat, chip->irq_stat, NBANK(chip)); |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 557 | |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 558 | for (i = 0; i < NBANK(chip); i++) { |
| 559 | trigger[i] = (cur_stat[i] ^ old_stat[i]) & chip->irq_mask[i]; |
Joshua Scott | b6ac128 | 2015-05-22 12:35:12 +1200 | [diff] [blame] | 560 | if (trigger[i]) |
| 561 | trigger_seen = true; |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 562 | } |
| 563 | |
Joshua Scott | b6ac128 | 2015-05-22 12:35:12 +1200 | [diff] [blame] | 564 | if (!trigger_seen) |
| 565 | return false; |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 566 | |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 567 | memcpy(chip->irq_stat, cur_stat, NBANK(chip)); |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 568 | |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 569 | for (i = 0; i < NBANK(chip); i++) { |
| 570 | pending[i] = (old_stat[i] & chip->irq_trig_fall[i]) | |
| 571 | (cur_stat[i] & chip->irq_trig_raise[i]); |
| 572 | pending[i] &= trigger[i]; |
Joshua Scott | b6ac128 | 2015-05-22 12:35:12 +1200 | [diff] [blame] | 573 | if (pending[i]) |
| 574 | pending_seen = true; |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 575 | } |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 576 | |
Joshua Scott | b6ac128 | 2015-05-22 12:35:12 +1200 | [diff] [blame] | 577 | return pending_seen; |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 578 | } |
| 579 | |
| 580 | static irqreturn_t pca953x_irq_handler(int irq, void *devid) |
| 581 | { |
| 582 | struct pca953x_chip *chip = devid; |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 583 | u8 pending[MAX_BANK]; |
| 584 | u8 level; |
Toby Smith | 3275d07 | 2014-04-30 18:01:40 +1000 | [diff] [blame] | 585 | unsigned nhandled = 0; |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 586 | int i; |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 587 | |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 588 | if (!pca953x_irq_pending(chip, pending)) |
Toby Smith | 3275d07 | 2014-04-30 18:01:40 +1000 | [diff] [blame] | 589 | return IRQ_NONE; |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 590 | |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 591 | for (i = 0; i < NBANK(chip); i++) { |
| 592 | while (pending[i]) { |
| 593 | level = __ffs(pending[i]); |
Linus Walleij | 7bcbce5 | 2014-05-09 13:27:57 +0200 | [diff] [blame] | 594 | handle_nested_irq(irq_find_mapping(chip->gpio_chip.irqdomain, |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 595 | level + (BANK_SZ * i))); |
| 596 | pending[i] &= ~(1 << level); |
Toby Smith | 3275d07 | 2014-04-30 18:01:40 +1000 | [diff] [blame] | 597 | nhandled++; |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 598 | } |
| 599 | } |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 600 | |
Toby Smith | 3275d07 | 2014-04-30 18:01:40 +1000 | [diff] [blame] | 601 | return (nhandled > 0) ? IRQ_HANDLED : IRQ_NONE; |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 602 | } |
| 603 | |
| 604 | static int pca953x_irq_setup(struct pca953x_chip *chip, |
David Jander | c6dcf59 | 2011-06-14 11:00:55 +0200 | [diff] [blame] | 605 | int irq_base) |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 606 | { |
| 607 | struct i2c_client *client = chip->client; |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 608 | int ret, i, offset = 0; |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 609 | |
Markus Pargmann | 4bb9334 | 2014-07-29 09:24:43 +0200 | [diff] [blame] | 610 | if (client->irq && irq_base != -1 |
Andy Shevchenko | c666414 | 2015-10-01 14:20:27 +0300 | [diff] [blame] | 611 | && (chip->driver_data & PCA_INT)) { |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 612 | |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 613 | switch (chip->chip_type) { |
| 614 | case PCA953X_TYPE: |
| 615 | offset = PCA953X_INPUT; |
| 616 | break; |
| 617 | case PCA957X_TYPE: |
| 618 | offset = PCA957X_IN; |
| 619 | break; |
| 620 | } |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 621 | ret = pca953x_read_regs(chip, offset, chip->irq_stat); |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 622 | if (ret) |
Linus Walleij | b42748c | 2013-01-25 17:59:28 +0100 | [diff] [blame] | 623 | return ret; |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 624 | |
| 625 | /* |
| 626 | * There is no way to know which GPIO line generated the |
| 627 | * interrupt. We have to rely on the previous read for |
| 628 | * this purpose. |
| 629 | */ |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 630 | for (i = 0; i < NBANK(chip); i++) |
| 631 | chip->irq_stat[i] &= chip->reg_direction[i]; |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 632 | mutex_init(&chip->irq_lock); |
| 633 | |
Linus Walleij | b42748c | 2013-01-25 17:59:28 +0100 | [diff] [blame] | 634 | ret = devm_request_threaded_irq(&client->dev, |
| 635 | client->irq, |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 636 | NULL, |
| 637 | pca953x_irq_handler, |
Toby Smith | 9132913 | 2014-04-30 18:01:41 +1000 | [diff] [blame] | 638 | IRQF_TRIGGER_LOW | IRQF_ONESHOT | |
| 639 | IRQF_SHARED, |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 640 | dev_name(&client->dev), chip); |
| 641 | if (ret) { |
| 642 | dev_err(&client->dev, "failed to request irq %d\n", |
| 643 | client->irq); |
Gregory CLEMENT | 0e8f2fd | 2013-01-25 17:59:27 +0100 | [diff] [blame] | 644 | return ret; |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 645 | } |
| 646 | |
Linus Walleij | 7bcbce5 | 2014-05-09 13:27:57 +0200 | [diff] [blame] | 647 | ret = gpiochip_irqchip_add(&chip->gpio_chip, |
| 648 | &pca953x_irq_chip, |
| 649 | irq_base, |
| 650 | handle_simple_irq, |
| 651 | IRQ_TYPE_NONE); |
| 652 | if (ret) { |
| 653 | dev_err(&client->dev, |
| 654 | "could not connect irqchip to gpiochip\n"); |
| 655 | return ret; |
| 656 | } |
Grygorii Strashko | fdd5040 | 2015-07-07 17:34:49 +0300 | [diff] [blame] | 657 | |
| 658 | gpiochip_set_chained_irqchip(&chip->gpio_chip, |
| 659 | &pca953x_irq_chip, |
| 660 | client->irq, NULL); |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 661 | } |
| 662 | |
| 663 | return 0; |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 664 | } |
| 665 | |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 666 | #else /* CONFIG_GPIO_PCA953X_IRQ */ |
| 667 | static int pca953x_irq_setup(struct pca953x_chip *chip, |
David Jander | c6dcf59 | 2011-06-14 11:00:55 +0200 | [diff] [blame] | 668 | int irq_base) |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 669 | { |
| 670 | struct i2c_client *client = chip->client; |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 671 | |
Andy Shevchenko | c666414 | 2015-10-01 14:20:27 +0300 | [diff] [blame] | 672 | if (irq_base != -1 && (chip->driver_data & PCA_INT)) |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 673 | dev_warn(&client->dev, "interrupt support not compiled in\n"); |
| 674 | |
| 675 | return 0; |
| 676 | } |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 677 | #endif |
| 678 | |
Bill Pemberton | 3836309 | 2012-11-19 13:22:34 -0500 | [diff] [blame] | 679 | static int device_pca953x_init(struct pca953x_chip *chip, u32 invert) |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 680 | { |
| 681 | int ret; |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 682 | u8 val[MAX_BANK]; |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 683 | |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 684 | ret = pca953x_read_regs(chip, PCA953X_OUTPUT, chip->reg_output); |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 685 | if (ret) |
| 686 | goto out; |
| 687 | |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 688 | ret = pca953x_read_regs(chip, PCA953X_DIRECTION, |
| 689 | chip->reg_direction); |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 690 | if (ret) |
| 691 | goto out; |
| 692 | |
| 693 | /* set platform specific polarity inversion */ |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 694 | if (invert) |
| 695 | memset(val, 0xFF, NBANK(chip)); |
| 696 | else |
| 697 | memset(val, 0, NBANK(chip)); |
| 698 | |
| 699 | ret = pca953x_write_regs(chip, PCA953X_INVERT, val); |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 700 | out: |
| 701 | return ret; |
| 702 | } |
| 703 | |
Bill Pemberton | 3836309 | 2012-11-19 13:22:34 -0500 | [diff] [blame] | 704 | static int device_pca957x_init(struct pca953x_chip *chip, u32 invert) |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 705 | { |
| 706 | int ret; |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 707 | u8 val[MAX_BANK]; |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 708 | |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 709 | ret = pca953x_read_regs(chip, PCA957X_OUT, chip->reg_output); |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 710 | if (ret) |
| 711 | goto out; |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 712 | ret = pca953x_read_regs(chip, PCA957X_CFG, chip->reg_direction); |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 713 | if (ret) |
| 714 | goto out; |
| 715 | |
| 716 | /* set platform specific polarity inversion */ |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 717 | if (invert) |
| 718 | memset(val, 0xFF, NBANK(chip)); |
| 719 | else |
| 720 | memset(val, 0, NBANK(chip)); |
Nicholas Krause | c75a377 | 2015-08-26 17:52:19 -0400 | [diff] [blame] | 721 | ret = pca953x_write_regs(chip, PCA957X_INVRT, val); |
| 722 | if (ret) |
| 723 | goto out; |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 724 | |
Colin Cronin | 20a8a96 | 2015-05-18 11:41:43 -0700 | [diff] [blame] | 725 | /* To enable register 6, 7 to control pull up and pull down */ |
Gregory CLEMENT | f5f0b7a | 2013-01-22 22:10:23 +0100 | [diff] [blame] | 726 | memset(val, 0x02, NBANK(chip)); |
Nicholas Krause | c75a377 | 2015-08-26 17:52:19 -0400 | [diff] [blame] | 727 | ret = pca953x_write_regs(chip, PCA957X_BKEN, val); |
| 728 | if (ret) |
| 729 | goto out; |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 730 | |
| 731 | return 0; |
| 732 | out: |
| 733 | return ret; |
| 734 | } |
| 735 | |
Ben Dooks | 6f29c9a | 2015-12-08 10:19:26 +0000 | [diff] [blame] | 736 | static const struct of_device_id pca953x_dt_ids[]; |
| 737 | |
Bill Pemberton | 3836309 | 2012-11-19 13:22:34 -0500 | [diff] [blame] | 738 | static int pca953x_probe(struct i2c_client *client, |
Jean Delvare | 3760f73 | 2008-04-29 23:11:40 +0200 | [diff] [blame] | 739 | const struct i2c_device_id *id) |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 740 | { |
Guennadi Liakhovetski | f3dc363 | 2008-02-06 01:39:03 -0800 | [diff] [blame] | 741 | struct pca953x_platform_data *pdata; |
| 742 | struct pca953x_chip *chip; |
Chandrabhanu Mahapatra | 6a7b36a | 2012-07-10 19:05:37 +0530 | [diff] [blame] | 743 | int irq_base = 0; |
Wolfram Sang | 7ea2aa2 | 2011-10-14 15:32:00 +0200 | [diff] [blame] | 744 | int ret; |
Chandrabhanu Mahapatra | 6a7b36a | 2012-07-10 19:05:37 +0530 | [diff] [blame] | 745 | u32 invert = 0; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 746 | |
Linus Walleij | b42748c | 2013-01-25 17:59:28 +0100 | [diff] [blame] | 747 | chip = devm_kzalloc(&client->dev, |
| 748 | sizeof(struct pca953x_chip), GFP_KERNEL); |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 749 | if (chip == NULL) |
| 750 | return -ENOMEM; |
| 751 | |
Jingoo Han | e56aee1 | 2013-07-30 17:08:05 +0900 | [diff] [blame] | 752 | pdata = dev_get_platdata(&client->dev); |
David Jander | c6dcf59 | 2011-06-14 11:00:55 +0200 | [diff] [blame] | 753 | if (pdata) { |
| 754 | irq_base = pdata->irq_base; |
| 755 | chip->gpio_start = pdata->gpio_base; |
| 756 | invert = pdata->invert; |
| 757 | chip->names = pdata->names; |
| 758 | } else { |
Markus Pargmann | 4bb9334 | 2014-07-29 09:24:43 +0200 | [diff] [blame] | 759 | chip->gpio_start = -1; |
| 760 | irq_base = 0; |
Nate Case | 1965d30 | 2009-06-17 16:26:17 -0700 | [diff] [blame] | 761 | } |
| 762 | |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 763 | chip->client = client; |
| 764 | |
Andy Shevchenko | f32517b | 2015-10-01 14:20:28 +0300 | [diff] [blame] | 765 | if (id) { |
| 766 | chip->driver_data = id->driver_data; |
| 767 | } else { |
| 768 | const struct acpi_device_id *id; |
Ben Dooks | 6f29c9a | 2015-12-08 10:19:26 +0000 | [diff] [blame] | 769 | const struct of_device_id *match; |
Andy Shevchenko | f32517b | 2015-10-01 14:20:28 +0300 | [diff] [blame] | 770 | |
Ben Dooks | 6f29c9a | 2015-12-08 10:19:26 +0000 | [diff] [blame] | 771 | match = of_match_device(pca953x_dt_ids, &client->dev); |
| 772 | if (match) { |
| 773 | chip->driver_data = (int)(uintptr_t)match->data; |
| 774 | } else { |
| 775 | id = acpi_match_device(pca953x_acpi_ids, &client->dev); |
| 776 | if (!id) |
| 777 | return -ENODEV; |
Andy Shevchenko | f32517b | 2015-10-01 14:20:28 +0300 | [diff] [blame] | 778 | |
Ben Dooks | 6f29c9a | 2015-12-08 10:19:26 +0000 | [diff] [blame] | 779 | chip->driver_data = id->driver_data; |
| 780 | } |
Andy Shevchenko | f32517b | 2015-10-01 14:20:28 +0300 | [diff] [blame] | 781 | } |
| 782 | |
Andy Shevchenko | c666414 | 2015-10-01 14:20:27 +0300 | [diff] [blame] | 783 | chip->chip_type = PCA_CHIP_TYPE(chip->driver_data); |
Daniel Silverstone | 77906a54 | 2009-06-17 16:26:15 -0700 | [diff] [blame] | 784 | |
Roland Stigge | 6e20fb1 | 2011-02-10 15:01:23 -0800 | [diff] [blame] | 785 | mutex_init(&chip->i2c_lock); |
| 786 | |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 787 | /* initialize cached registers from their original values. |
| 788 | * we can't share this chip with another i2c master. |
| 789 | */ |
Andy Shevchenko | c666414 | 2015-10-01 14:20:27 +0300 | [diff] [blame] | 790 | pca953x_setup_gpio(chip, chip->driver_data & PCA_GPIO_MASK); |
Guennadi Liakhovetski | f5e8ff4 | 2008-02-06 01:39:04 -0800 | [diff] [blame] | 791 | |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 792 | if (chip->chip_type == PCA953X_TYPE) |
Wolfram Sang | 7ea2aa2 | 2011-10-14 15:32:00 +0200 | [diff] [blame] | 793 | ret = device_pca953x_init(chip, invert); |
Haojian Zhuang | 33226ff | 2011-04-18 22:12:46 +0800 | [diff] [blame] | 794 | else |
Wolfram Sang | 7ea2aa2 | 2011-10-14 15:32:00 +0200 | [diff] [blame] | 795 | ret = device_pca957x_init(chip, invert); |
| 796 | if (ret) |
Linus Walleij | b42748c | 2013-01-25 17:59:28 +0100 | [diff] [blame] | 797 | return ret; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 798 | |
Laxman Dewangan | 0ece84f | 2016-02-22 17:43:28 +0530 | [diff] [blame] | 799 | ret = devm_gpiochip_add_data(&client->dev, &chip->gpio_chip, chip); |
Marc Zyngier | 89ea8bb | 2010-03-05 13:44:36 -0800 | [diff] [blame] | 800 | if (ret) |
Linus Walleij | b42748c | 2013-01-25 17:59:28 +0100 | [diff] [blame] | 801 | return ret; |
Guennadi Liakhovetski | f5e8ff4 | 2008-02-06 01:39:04 -0800 | [diff] [blame] | 802 | |
Andy Shevchenko | c666414 | 2015-10-01 14:20:27 +0300 | [diff] [blame] | 803 | ret = pca953x_irq_setup(chip, irq_base); |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 804 | if (ret) |
Linus Walleij | b42748c | 2013-01-25 17:59:28 +0100 | [diff] [blame] | 805 | return ret; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 806 | |
David Jander | c6dcf59 | 2011-06-14 11:00:55 +0200 | [diff] [blame] | 807 | if (pdata && pdata->setup) { |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 808 | ret = pdata->setup(client, chip->gpio_chip.base, |
| 809 | chip->gpio_chip.ngpio, pdata->context); |
| 810 | if (ret < 0) |
| 811 | dev_warn(&client->dev, "setup failed, %d\n", ret); |
| 812 | } |
| 813 | |
| 814 | i2c_set_clientdata(client, chip); |
| 815 | return 0; |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 816 | } |
| 817 | |
Guennadi Liakhovetski | f3dc363 | 2008-02-06 01:39:03 -0800 | [diff] [blame] | 818 | static int pca953x_remove(struct i2c_client *client) |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 819 | { |
Jingoo Han | e56aee1 | 2013-07-30 17:08:05 +0900 | [diff] [blame] | 820 | struct pca953x_platform_data *pdata = dev_get_platdata(&client->dev); |
Guennadi Liakhovetski | f3dc363 | 2008-02-06 01:39:03 -0800 | [diff] [blame] | 821 | struct pca953x_chip *chip = i2c_get_clientdata(client); |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 822 | int ret = 0; |
| 823 | |
David Jander | c6dcf59 | 2011-06-14 11:00:55 +0200 | [diff] [blame] | 824 | if (pdata && pdata->teardown) { |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 825 | ret = pdata->teardown(client, chip->gpio_chip.base, |
| 826 | chip->gpio_chip.ngpio, pdata->context); |
| 827 | if (ret < 0) { |
| 828 | dev_err(&client->dev, "%s failed, %d\n", |
| 829 | "teardown", ret); |
| 830 | return ret; |
| 831 | } |
| 832 | } |
| 833 | |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 834 | return 0; |
| 835 | } |
| 836 | |
Ben Dooks | 6f29c9a | 2015-12-08 10:19:26 +0000 | [diff] [blame] | 837 | /* convenience to stop overlong match-table lines */ |
| 838 | #define OF_953X(__nrgpio, __int) (void *)(__nrgpio | PCA953X_TYPE | __int) |
| 839 | #define OF_957X(__nrgpio, __int) (void *)(__nrgpio | PCA957X_TYPE | __int) |
| 840 | |
Maxime Ripard | ed32620 | 2012-11-08 18:01:52 +0100 | [diff] [blame] | 841 | static const struct of_device_id pca953x_dt_ids[] = { |
Ben Dooks | 6f29c9a | 2015-12-08 10:19:26 +0000 | [diff] [blame] | 842 | { .compatible = "nxp,pca9505", .data = OF_953X(40, PCA_INT), }, |
| 843 | { .compatible = "nxp,pca9534", .data = OF_953X( 8, PCA_INT), }, |
| 844 | { .compatible = "nxp,pca9535", .data = OF_953X(16, PCA_INT), }, |
| 845 | { .compatible = "nxp,pca9536", .data = OF_953X( 4, 0), }, |
| 846 | { .compatible = "nxp,pca9537", .data = OF_953X( 4, PCA_INT), }, |
| 847 | { .compatible = "nxp,pca9538", .data = OF_953X( 8, PCA_INT), }, |
| 848 | { .compatible = "nxp,pca9539", .data = OF_953X(16, PCA_INT), }, |
| 849 | { .compatible = "nxp,pca9554", .data = OF_953X( 8, PCA_INT), }, |
| 850 | { .compatible = "nxp,pca9555", .data = OF_953X(16, PCA_INT), }, |
| 851 | { .compatible = "nxp,pca9556", .data = OF_953X( 8, 0), }, |
| 852 | { .compatible = "nxp,pca9557", .data = OF_953X( 8, 0), }, |
| 853 | { .compatible = "nxp,pca9574", .data = OF_957X( 8, PCA_INT), }, |
| 854 | { .compatible = "nxp,pca9575", .data = OF_957X(16, PCA_INT), }, |
| 855 | { .compatible = "nxp,pca9698", .data = OF_953X(40, 0), }, |
Maxime Ripard | ed32620 | 2012-11-08 18:01:52 +0100 | [diff] [blame] | 856 | |
Ben Dooks | 6f29c9a | 2015-12-08 10:19:26 +0000 | [diff] [blame] | 857 | { .compatible = "maxim,max7310", .data = OF_953X( 8, 0), }, |
| 858 | { .compatible = "maxim,max7312", .data = OF_953X(16, PCA_INT), }, |
| 859 | { .compatible = "maxim,max7313", .data = OF_953X(16, PCA_INT), }, |
| 860 | { .compatible = "maxim,max7315", .data = OF_953X( 8, PCA_INT), }, |
Maxime Ripard | ed32620 | 2012-11-08 18:01:52 +0100 | [diff] [blame] | 861 | |
Ben Dooks | 6f29c9a | 2015-12-08 10:19:26 +0000 | [diff] [blame] | 862 | { .compatible = "ti,pca6107", .data = OF_953X( 8, PCA_INT), }, |
| 863 | { .compatible = "ti,tca6408", .data = OF_953X( 8, PCA_INT), }, |
| 864 | { .compatible = "ti,tca6416", .data = OF_953X(16, PCA_INT), }, |
| 865 | { .compatible = "ti,tca6424", .data = OF_953X(24, PCA_INT), }, |
Aaron Sierra | e73760a | 2014-02-07 16:36:21 -0600 | [diff] [blame] | 866 | |
Ben Dooks | 6f29c9a | 2015-12-08 10:19:26 +0000 | [diff] [blame] | 867 | { .compatible = "onsemi,pca9654", .data = OF_953X( 8, PCA_INT), }, |
Ben Dooks | 9f49f6d | 2015-12-08 10:19:25 +0000 | [diff] [blame] | 868 | |
Ben Dooks | 6f29c9a | 2015-12-08 10:19:26 +0000 | [diff] [blame] | 869 | { .compatible = "exar,xra1202", .data = OF_953X( 8, 0), }, |
Maxime Ripard | ed32620 | 2012-11-08 18:01:52 +0100 | [diff] [blame] | 870 | { } |
| 871 | }; |
| 872 | |
| 873 | MODULE_DEVICE_TABLE(of, pca953x_dt_ids); |
| 874 | |
Guennadi Liakhovetski | f3dc363 | 2008-02-06 01:39:03 -0800 | [diff] [blame] | 875 | static struct i2c_driver pca953x_driver = { |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 876 | .driver = { |
Guennadi Liakhovetski | f3dc363 | 2008-02-06 01:39:03 -0800 | [diff] [blame] | 877 | .name = "pca953x", |
Maxime Ripard | ed32620 | 2012-11-08 18:01:52 +0100 | [diff] [blame] | 878 | .of_match_table = pca953x_dt_ids, |
Andy Shevchenko | f32517b | 2015-10-01 14:20:28 +0300 | [diff] [blame] | 879 | .acpi_match_table = ACPI_PTR(pca953x_acpi_ids), |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 880 | }, |
Guennadi Liakhovetski | f3dc363 | 2008-02-06 01:39:03 -0800 | [diff] [blame] | 881 | .probe = pca953x_probe, |
| 882 | .remove = pca953x_remove, |
Jean Delvare | 3760f73 | 2008-04-29 23:11:40 +0200 | [diff] [blame] | 883 | .id_table = pca953x_id, |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 884 | }; |
| 885 | |
Guennadi Liakhovetski | f3dc363 | 2008-02-06 01:39:03 -0800 | [diff] [blame] | 886 | static int __init pca953x_init(void) |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 887 | { |
Guennadi Liakhovetski | f3dc363 | 2008-02-06 01:39:03 -0800 | [diff] [blame] | 888 | return i2c_add_driver(&pca953x_driver); |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 889 | } |
David Brownell | 2f8d119 | 2008-10-15 22:03:13 -0700 | [diff] [blame] | 890 | /* register after i2c postcore initcall and before |
| 891 | * subsys initcalls that may rely on these GPIOs |
| 892 | */ |
| 893 | subsys_initcall(pca953x_init); |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 894 | |
Guennadi Liakhovetski | f3dc363 | 2008-02-06 01:39:03 -0800 | [diff] [blame] | 895 | static void __exit pca953x_exit(void) |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 896 | { |
Guennadi Liakhovetski | f3dc363 | 2008-02-06 01:39:03 -0800 | [diff] [blame] | 897 | i2c_del_driver(&pca953x_driver); |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 898 | } |
Guennadi Liakhovetski | f3dc363 | 2008-02-06 01:39:03 -0800 | [diff] [blame] | 899 | module_exit(pca953x_exit); |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 900 | |
| 901 | MODULE_AUTHOR("eric miao <eric.miao@marvell.com>"); |
Guennadi Liakhovetski | f3dc363 | 2008-02-06 01:39:03 -0800 | [diff] [blame] | 902 | MODULE_DESCRIPTION("GPIO expander driver for PCA953x"); |
eric miao | 9e60fdc | 2008-02-04 22:28:26 -0800 | [diff] [blame] | 903 | MODULE_LICENSE("GPL"); |