Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) ST-Ericsson SA 2010 |
| 3 | * |
| 4 | * License Terms: GNU General Public License, version 2 |
| 5 | * Author: Hanumath Prasad <hanumath.prasad@stericsson.com> for ST-Ericsson |
| 6 | * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson |
| 7 | */ |
| 8 | |
| 9 | #include <linux/module.h> |
| 10 | #include <linux/init.h> |
| 11 | #include <linux/platform_device.h> |
| 12 | #include <linux/slab.h> |
| 13 | #include <linux/gpio.h> |
Lee Jones | 3113e67 | 2012-09-07 12:14:59 +0100 | [diff] [blame] | 14 | #include <linux/of.h> |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 15 | #include <linux/interrupt.h> |
Sundar Iyer | c6eda6c | 2010-12-13 09:33:12 +0530 | [diff] [blame] | 16 | #include <linux/mfd/tc3589x.h> |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 17 | |
| 18 | /* |
| 19 | * These registers are modified under the irq bus lock and cached to avoid |
| 20 | * unnecessary writes in bus_sync_unlock. |
| 21 | */ |
| 22 | enum { REG_IBE, REG_IEV, REG_IS, REG_IE }; |
| 23 | |
| 24 | #define CACHE_NR_REGS 4 |
| 25 | #define CACHE_NR_BANKS 3 |
| 26 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 27 | struct tc3589x_gpio { |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 28 | struct gpio_chip chip; |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 29 | struct tc3589x *tc3589x; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 30 | struct device *dev; |
| 31 | struct mutex irq_lock; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 32 | /* Caches of interrupt control registers for bus_lock */ |
| 33 | u8 regs[CACHE_NR_REGS][CACHE_NR_BANKS]; |
| 34 | u8 oldregs[CACHE_NR_REGS][CACHE_NR_BANKS]; |
| 35 | }; |
| 36 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 37 | static inline struct tc3589x_gpio *to_tc3589x_gpio(struct gpio_chip *chip) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 38 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 39 | return container_of(chip, struct tc3589x_gpio, chip); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 40 | } |
| 41 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 42 | static int tc3589x_gpio_get(struct gpio_chip *chip, unsigned offset) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 43 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 44 | struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip); |
| 45 | struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; |
| 46 | u8 reg = TC3589x_GPIODATA0 + (offset / 8) * 2; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 47 | u8 mask = 1 << (offset % 8); |
| 48 | int ret; |
| 49 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 50 | ret = tc3589x_reg_read(tc3589x, reg); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 51 | if (ret < 0) |
| 52 | return ret; |
| 53 | |
| 54 | return ret & mask; |
| 55 | } |
| 56 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 57 | static void tc3589x_gpio_set(struct gpio_chip *chip, unsigned offset, int val) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 58 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 59 | struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip); |
| 60 | struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; |
| 61 | u8 reg = TC3589x_GPIODATA0 + (offset / 8) * 2; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 62 | unsigned pos = offset % 8; |
| 63 | u8 data[] = {!!val << pos, 1 << pos}; |
| 64 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 65 | tc3589x_block_write(tc3589x, reg, ARRAY_SIZE(data), data); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 66 | } |
| 67 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 68 | static int tc3589x_gpio_direction_output(struct gpio_chip *chip, |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 69 | unsigned offset, int val) |
| 70 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 71 | struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip); |
| 72 | struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; |
| 73 | u8 reg = TC3589x_GPIODIR0 + offset / 8; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 74 | unsigned pos = offset % 8; |
| 75 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 76 | tc3589x_gpio_set(chip, offset, val); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 77 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 78 | return tc3589x_set_bits(tc3589x, reg, 1 << pos, 1 << pos); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 79 | } |
| 80 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 81 | static int tc3589x_gpio_direction_input(struct gpio_chip *chip, |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 82 | unsigned offset) |
| 83 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 84 | struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip); |
| 85 | struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; |
| 86 | u8 reg = TC3589x_GPIODIR0 + offset / 8; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 87 | unsigned pos = offset % 8; |
| 88 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 89 | return tc3589x_set_bits(tc3589x, reg, 1 << pos, 0); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 90 | } |
| 91 | |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 92 | static struct gpio_chip template_chip = { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 93 | .label = "tc3589x", |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 94 | .owner = THIS_MODULE, |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 95 | .direction_input = tc3589x_gpio_direction_input, |
| 96 | .get = tc3589x_gpio_get, |
| 97 | .direction_output = tc3589x_gpio_direction_output, |
| 98 | .set = tc3589x_gpio_set, |
Linus Walleij | 9fb1f39 | 2013-12-04 14:42:46 +0100 | [diff] [blame] | 99 | .can_sleep = true, |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 100 | }; |
| 101 | |
Lennert Buytenhek | 33fcc1b | 2011-01-12 17:00:19 -0800 | [diff] [blame] | 102 | static int tc3589x_gpio_irq_set_type(struct irq_data *d, unsigned int type) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 103 | { |
Linus Walleij | cf42f1c | 2014-04-09 13:38:33 +0200 | [diff] [blame] | 104 | struct gpio_chip *gc = irq_data_get_irq_chip_data(d); |
| 105 | struct tc3589x_gpio *tc3589x_gpio = container_of(gc, struct tc3589x_gpio, chip); |
Lee Jones | efe4c94 | 2012-09-07 12:14:58 +0100 | [diff] [blame] | 106 | int offset = d->hwirq; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 107 | int regoffset = offset / 8; |
| 108 | int mask = 1 << (offset % 8); |
| 109 | |
| 110 | if (type == IRQ_TYPE_EDGE_BOTH) { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 111 | tc3589x_gpio->regs[REG_IBE][regoffset] |= mask; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 112 | return 0; |
| 113 | } |
| 114 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 115 | tc3589x_gpio->regs[REG_IBE][regoffset] &= ~mask; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 116 | |
| 117 | if (type == IRQ_TYPE_LEVEL_LOW || type == IRQ_TYPE_LEVEL_HIGH) |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 118 | tc3589x_gpio->regs[REG_IS][regoffset] |= mask; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 119 | else |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 120 | tc3589x_gpio->regs[REG_IS][regoffset] &= ~mask; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 121 | |
| 122 | if (type == IRQ_TYPE_EDGE_RISING || type == IRQ_TYPE_LEVEL_HIGH) |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 123 | tc3589x_gpio->regs[REG_IEV][regoffset] |= mask; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 124 | else |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 125 | tc3589x_gpio->regs[REG_IEV][regoffset] &= ~mask; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 126 | |
| 127 | return 0; |
| 128 | } |
| 129 | |
Lennert Buytenhek | 33fcc1b | 2011-01-12 17:00:19 -0800 | [diff] [blame] | 130 | static void tc3589x_gpio_irq_lock(struct irq_data *d) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 131 | { |
Linus Walleij | cf42f1c | 2014-04-09 13:38:33 +0200 | [diff] [blame] | 132 | struct gpio_chip *gc = irq_data_get_irq_chip_data(d); |
| 133 | struct tc3589x_gpio *tc3589x_gpio = container_of(gc, struct tc3589x_gpio, chip); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 134 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 135 | mutex_lock(&tc3589x_gpio->irq_lock); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 136 | } |
| 137 | |
Lennert Buytenhek | 33fcc1b | 2011-01-12 17:00:19 -0800 | [diff] [blame] | 138 | static void tc3589x_gpio_irq_sync_unlock(struct irq_data *d) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 139 | { |
Linus Walleij | cf42f1c | 2014-04-09 13:38:33 +0200 | [diff] [blame] | 140 | struct gpio_chip *gc = irq_data_get_irq_chip_data(d); |
| 141 | struct tc3589x_gpio *tc3589x_gpio = container_of(gc, struct tc3589x_gpio, chip); |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 142 | struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 143 | static const u8 regmap[] = { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 144 | [REG_IBE] = TC3589x_GPIOIBE0, |
| 145 | [REG_IEV] = TC3589x_GPIOIEV0, |
| 146 | [REG_IS] = TC3589x_GPIOIS0, |
| 147 | [REG_IE] = TC3589x_GPIOIE0, |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 148 | }; |
| 149 | int i, j; |
| 150 | |
| 151 | for (i = 0; i < CACHE_NR_REGS; i++) { |
| 152 | for (j = 0; j < CACHE_NR_BANKS; j++) { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 153 | u8 old = tc3589x_gpio->oldregs[i][j]; |
| 154 | u8 new = tc3589x_gpio->regs[i][j]; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 155 | |
| 156 | if (new == old) |
| 157 | continue; |
| 158 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 159 | tc3589x_gpio->oldregs[i][j] = new; |
| 160 | tc3589x_reg_write(tc3589x, regmap[i] + j * 8, new); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 161 | } |
| 162 | } |
| 163 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 164 | mutex_unlock(&tc3589x_gpio->irq_lock); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 165 | } |
| 166 | |
Lennert Buytenhek | 33fcc1b | 2011-01-12 17:00:19 -0800 | [diff] [blame] | 167 | static void tc3589x_gpio_irq_mask(struct irq_data *d) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 168 | { |
Linus Walleij | cf42f1c | 2014-04-09 13:38:33 +0200 | [diff] [blame] | 169 | struct gpio_chip *gc = irq_data_get_irq_chip_data(d); |
| 170 | struct tc3589x_gpio *tc3589x_gpio = container_of(gc, struct tc3589x_gpio, chip); |
Lee Jones | efe4c94 | 2012-09-07 12:14:58 +0100 | [diff] [blame] | 171 | int offset = d->hwirq; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 172 | int regoffset = offset / 8; |
| 173 | int mask = 1 << (offset % 8); |
| 174 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 175 | tc3589x_gpio->regs[REG_IE][regoffset] &= ~mask; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 176 | } |
| 177 | |
Lennert Buytenhek | 33fcc1b | 2011-01-12 17:00:19 -0800 | [diff] [blame] | 178 | static void tc3589x_gpio_irq_unmask(struct irq_data *d) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 179 | { |
Linus Walleij | cf42f1c | 2014-04-09 13:38:33 +0200 | [diff] [blame] | 180 | struct gpio_chip *gc = irq_data_get_irq_chip_data(d); |
| 181 | struct tc3589x_gpio *tc3589x_gpio = container_of(gc, struct tc3589x_gpio, chip); |
Lee Jones | efe4c94 | 2012-09-07 12:14:58 +0100 | [diff] [blame] | 182 | int offset = d->hwirq; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 183 | int regoffset = offset / 8; |
| 184 | int mask = 1 << (offset % 8); |
| 185 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 186 | tc3589x_gpio->regs[REG_IE][regoffset] |= mask; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 187 | } |
| 188 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 189 | static struct irq_chip tc3589x_gpio_irq_chip = { |
| 190 | .name = "tc3589x-gpio", |
Lennert Buytenhek | 33fcc1b | 2011-01-12 17:00:19 -0800 | [diff] [blame] | 191 | .irq_bus_lock = tc3589x_gpio_irq_lock, |
| 192 | .irq_bus_sync_unlock = tc3589x_gpio_irq_sync_unlock, |
| 193 | .irq_mask = tc3589x_gpio_irq_mask, |
| 194 | .irq_unmask = tc3589x_gpio_irq_unmask, |
| 195 | .irq_set_type = tc3589x_gpio_irq_set_type, |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 196 | }; |
| 197 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 198 | static irqreturn_t tc3589x_gpio_irq(int irq, void *dev) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 199 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 200 | struct tc3589x_gpio *tc3589x_gpio = dev; |
| 201 | struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 202 | u8 status[CACHE_NR_BANKS]; |
| 203 | int ret; |
| 204 | int i; |
| 205 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 206 | ret = tc3589x_block_read(tc3589x, TC3589x_GPIOMIS0, |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 207 | ARRAY_SIZE(status), status); |
| 208 | if (ret < 0) |
| 209 | return IRQ_NONE; |
| 210 | |
| 211 | for (i = 0; i < ARRAY_SIZE(status); i++) { |
| 212 | unsigned int stat = status[i]; |
| 213 | if (!stat) |
| 214 | continue; |
| 215 | |
| 216 | while (stat) { |
| 217 | int bit = __ffs(stat); |
| 218 | int line = i * 8 + bit; |
Linus Walleij | cf42f1c | 2014-04-09 13:38:33 +0200 | [diff] [blame] | 219 | int irq = irq_find_mapping(tc3589x_gpio->chip.irqdomain, |
| 220 | line); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 221 | |
Linus Walleij | e300376 | 2013-10-11 19:06:12 +0200 | [diff] [blame] | 222 | handle_nested_irq(irq); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 223 | stat &= ~(1 << bit); |
| 224 | } |
| 225 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 226 | tc3589x_reg_write(tc3589x, TC3589x_GPIOIC0 + i, status[i]); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 227 | } |
| 228 | |
| 229 | return IRQ_HANDLED; |
| 230 | } |
| 231 | |
Bill Pemberton | 3836309 | 2012-11-19 13:22:34 -0500 | [diff] [blame] | 232 | static int tc3589x_gpio_probe(struct platform_device *pdev) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 233 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 234 | struct tc3589x *tc3589x = dev_get_drvdata(pdev->dev.parent); |
Lee Jones | 3113e67 | 2012-09-07 12:14:59 +0100 | [diff] [blame] | 235 | struct device_node *np = pdev->dev.of_node; |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 236 | struct tc3589x_gpio *tc3589x_gpio; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 237 | int ret; |
| 238 | int irq; |
| 239 | |
Linus Walleij | 53e41f5 | 2014-12-15 10:39:47 +0100 | [diff] [blame] | 240 | if (!np) { |
| 241 | dev_err(&pdev->dev, "No Device Tree node found\n"); |
Lee Jones | 3113e67 | 2012-09-07 12:14:59 +0100 | [diff] [blame] | 242 | return -EINVAL; |
| 243 | } |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 244 | |
| 245 | irq = platform_get_irq(pdev, 0); |
| 246 | if (irq < 0) |
| 247 | return irq; |
| 248 | |
Linus Walleij | 033f275 | 2014-04-09 12:38:56 +0200 | [diff] [blame] | 249 | tc3589x_gpio = devm_kzalloc(&pdev->dev, sizeof(struct tc3589x_gpio), |
| 250 | GFP_KERNEL); |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 251 | if (!tc3589x_gpio) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 252 | return -ENOMEM; |
| 253 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 254 | mutex_init(&tc3589x_gpio->irq_lock); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 255 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 256 | tc3589x_gpio->dev = &pdev->dev; |
| 257 | tc3589x_gpio->tc3589x = tc3589x; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 258 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 259 | tc3589x_gpio->chip = template_chip; |
| 260 | tc3589x_gpio->chip.ngpio = tc3589x->num_gpio; |
| 261 | tc3589x_gpio->chip.dev = &pdev->dev; |
Linus Walleij | 90f2d0f | 2014-10-28 11:06:56 +0100 | [diff] [blame] | 262 | tc3589x_gpio->chip.base = -1; |
Laurent Navet | e90c636 | 2013-03-20 13:16:02 +0100 | [diff] [blame] | 263 | tc3589x_gpio->chip.of_node = np; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 264 | |
| 265 | /* Bring the GPIO module out of reset */ |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 266 | ret = tc3589x_set_bits(tc3589x, TC3589x_RSTCTRL, |
| 267 | TC3589x_RSTCTRL_GPIRST, 0); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 268 | if (ret < 0) |
Linus Walleij | 033f275 | 2014-04-09 12:38:56 +0200 | [diff] [blame] | 269 | return ret; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 270 | |
Linus Walleij | 033f275 | 2014-04-09 12:38:56 +0200 | [diff] [blame] | 271 | ret = devm_request_threaded_irq(&pdev->dev, |
| 272 | irq, NULL, tc3589x_gpio_irq, |
| 273 | IRQF_ONESHOT, "tc3589x-gpio", |
| 274 | tc3589x_gpio); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 275 | if (ret) { |
| 276 | dev_err(&pdev->dev, "unable to get irq: %d\n", ret); |
Linus Walleij | 033f275 | 2014-04-09 12:38:56 +0200 | [diff] [blame] | 277 | return ret; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 278 | } |
| 279 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 280 | ret = gpiochip_add(&tc3589x_gpio->chip); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 281 | if (ret) { |
| 282 | dev_err(&pdev->dev, "unable to add gpiochip: %d\n", ret); |
Linus Walleij | 033f275 | 2014-04-09 12:38:56 +0200 | [diff] [blame] | 283 | return ret; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 284 | } |
| 285 | |
Linus Walleij | cf42f1c | 2014-04-09 13:38:33 +0200 | [diff] [blame] | 286 | ret = gpiochip_irqchip_add(&tc3589x_gpio->chip, |
| 287 | &tc3589x_gpio_irq_chip, |
| 288 | 0, |
| 289 | handle_simple_irq, |
| 290 | IRQ_TYPE_NONE); |
| 291 | if (ret) { |
| 292 | dev_err(&pdev->dev, |
| 293 | "could not connect irqchip to gpiochip\n"); |
| 294 | return ret; |
| 295 | } |
| 296 | |
Linus Walleij | 3f97d5fc | 2014-09-26 14:19:52 +0200 | [diff] [blame] | 297 | gpiochip_set_chained_irqchip(&tc3589x_gpio->chip, |
| 298 | &tc3589x_gpio_irq_chip, |
| 299 | irq, |
| 300 | NULL); |
| 301 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 302 | platform_set_drvdata(pdev, tc3589x_gpio); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 303 | |
| 304 | return 0; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 305 | } |
| 306 | |
Bill Pemberton | 206210c | 2012-11-19 13:25:50 -0500 | [diff] [blame] | 307 | static int tc3589x_gpio_remove(struct platform_device *pdev) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 308 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 309 | struct tc3589x_gpio *tc3589x_gpio = platform_get_drvdata(pdev); |
Rabin Vincent | f0a7a98 | 2010-09-13 13:04:02 +0100 | [diff] [blame] | 310 | |
abdoulaye berthe | 9f5132a | 2014-07-12 22:30:12 +0200 | [diff] [blame] | 311 | gpiochip_remove(&tc3589x_gpio->chip); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 312 | |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 313 | return 0; |
| 314 | } |
| 315 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 316 | static struct platform_driver tc3589x_gpio_driver = { |
| 317 | .driver.name = "tc3589x-gpio", |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 318 | .driver.owner = THIS_MODULE, |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 319 | .probe = tc3589x_gpio_probe, |
Bill Pemberton | 8283c4f | 2012-11-19 13:20:08 -0500 | [diff] [blame] | 320 | .remove = tc3589x_gpio_remove, |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 321 | }; |
| 322 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 323 | static int __init tc3589x_gpio_init(void) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 324 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 325 | return platform_driver_register(&tc3589x_gpio_driver); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 326 | } |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 327 | subsys_initcall(tc3589x_gpio_init); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 328 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 329 | static void __exit tc3589x_gpio_exit(void) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 330 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 331 | platform_driver_unregister(&tc3589x_gpio_driver); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 332 | } |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 333 | module_exit(tc3589x_gpio_exit); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 334 | |
| 335 | MODULE_LICENSE("GPL v2"); |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 336 | MODULE_DESCRIPTION("TC3589x GPIO driver"); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 337 | MODULE_AUTHOR("Hanumath Prasad, Rabin Vincent"); |