blob: c0595bbf3268d4bd8fff5dc5118e721c769c064d [file] [log] [blame]
Rabin Vincentd88b25b2010-05-10 23:43:47 +02001/*
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 Jones3113e672012-09-07 12:14:59 +010014#include <linux/of.h>
Rabin Vincentd88b25b2010-05-10 23:43:47 +020015#include <linux/irq.h>
Lee Jonesefe4c942012-09-07 12:14:58 +010016#include <linux/irqdomain.h>
Rabin Vincentd88b25b2010-05-10 23:43:47 +020017#include <linux/interrupt.h>
Sundar Iyerc6eda6c2010-12-13 09:33:12 +053018#include <linux/mfd/tc3589x.h>
Rabin Vincentd88b25b2010-05-10 23:43:47 +020019
20/*
21 * These registers are modified under the irq bus lock and cached to avoid
22 * unnecessary writes in bus_sync_unlock.
23 */
24enum { REG_IBE, REG_IEV, REG_IS, REG_IE };
25
26#define CACHE_NR_REGS 4
27#define CACHE_NR_BANKS 3
28
Sundar Iyer20406eb2010-12-13 09:33:14 +053029struct tc3589x_gpio {
Rabin Vincentd88b25b2010-05-10 23:43:47 +020030 struct gpio_chip chip;
Sundar Iyer20406eb2010-12-13 09:33:14 +053031 struct tc3589x *tc3589x;
Rabin Vincentd88b25b2010-05-10 23:43:47 +020032 struct device *dev;
33 struct mutex irq_lock;
Lee Jonesefe4c942012-09-07 12:14:58 +010034 struct irq_domain *domain;
Rabin Vincentd88b25b2010-05-10 23:43:47 +020035
36 int irq_base;
37
38 /* Caches of interrupt control registers for bus_lock */
39 u8 regs[CACHE_NR_REGS][CACHE_NR_BANKS];
40 u8 oldregs[CACHE_NR_REGS][CACHE_NR_BANKS];
41};
42
Sundar Iyer20406eb2010-12-13 09:33:14 +053043static inline struct tc3589x_gpio *to_tc3589x_gpio(struct gpio_chip *chip)
Rabin Vincentd88b25b2010-05-10 23:43:47 +020044{
Sundar Iyer20406eb2010-12-13 09:33:14 +053045 return container_of(chip, struct tc3589x_gpio, chip);
Rabin Vincentd88b25b2010-05-10 23:43:47 +020046}
47
Sundar Iyer20406eb2010-12-13 09:33:14 +053048static int tc3589x_gpio_get(struct gpio_chip *chip, unsigned offset)
Rabin Vincentd88b25b2010-05-10 23:43:47 +020049{
Sundar Iyer20406eb2010-12-13 09:33:14 +053050 struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip);
51 struct tc3589x *tc3589x = tc3589x_gpio->tc3589x;
52 u8 reg = TC3589x_GPIODATA0 + (offset / 8) * 2;
Rabin Vincentd88b25b2010-05-10 23:43:47 +020053 u8 mask = 1 << (offset % 8);
54 int ret;
55
Sundar Iyer20406eb2010-12-13 09:33:14 +053056 ret = tc3589x_reg_read(tc3589x, reg);
Rabin Vincentd88b25b2010-05-10 23:43:47 +020057 if (ret < 0)
58 return ret;
59
60 return ret & mask;
61}
62
Sundar Iyer20406eb2010-12-13 09:33:14 +053063static void tc3589x_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
Rabin Vincentd88b25b2010-05-10 23:43:47 +020064{
Sundar Iyer20406eb2010-12-13 09:33:14 +053065 struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip);
66 struct tc3589x *tc3589x = tc3589x_gpio->tc3589x;
67 u8 reg = TC3589x_GPIODATA0 + (offset / 8) * 2;
Rabin Vincentd88b25b2010-05-10 23:43:47 +020068 unsigned pos = offset % 8;
69 u8 data[] = {!!val << pos, 1 << pos};
70
Sundar Iyer20406eb2010-12-13 09:33:14 +053071 tc3589x_block_write(tc3589x, reg, ARRAY_SIZE(data), data);
Rabin Vincentd88b25b2010-05-10 23:43:47 +020072}
73
Sundar Iyer20406eb2010-12-13 09:33:14 +053074static int tc3589x_gpio_direction_output(struct gpio_chip *chip,
Rabin Vincentd88b25b2010-05-10 23:43:47 +020075 unsigned offset, int val)
76{
Sundar Iyer20406eb2010-12-13 09:33:14 +053077 struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip);
78 struct tc3589x *tc3589x = tc3589x_gpio->tc3589x;
79 u8 reg = TC3589x_GPIODIR0 + offset / 8;
Rabin Vincentd88b25b2010-05-10 23:43:47 +020080 unsigned pos = offset % 8;
81
Sundar Iyer20406eb2010-12-13 09:33:14 +053082 tc3589x_gpio_set(chip, offset, val);
Rabin Vincentd88b25b2010-05-10 23:43:47 +020083
Sundar Iyer20406eb2010-12-13 09:33:14 +053084 return tc3589x_set_bits(tc3589x, reg, 1 << pos, 1 << pos);
Rabin Vincentd88b25b2010-05-10 23:43:47 +020085}
86
Sundar Iyer20406eb2010-12-13 09:33:14 +053087static int tc3589x_gpio_direction_input(struct gpio_chip *chip,
Rabin Vincentd88b25b2010-05-10 23:43:47 +020088 unsigned offset)
89{
Sundar Iyer20406eb2010-12-13 09:33:14 +053090 struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip);
91 struct tc3589x *tc3589x = tc3589x_gpio->tc3589x;
92 u8 reg = TC3589x_GPIODIR0 + offset / 8;
Rabin Vincentd88b25b2010-05-10 23:43:47 +020093 unsigned pos = offset % 8;
94
Sundar Iyer20406eb2010-12-13 09:33:14 +053095 return tc3589x_set_bits(tc3589x, reg, 1 << pos, 0);
Rabin Vincentd88b25b2010-05-10 23:43:47 +020096}
97
Lee Jonesefe4c942012-09-07 12:14:58 +010098/**
99 * tc3589x_gpio_irq_get_virq(): Map an interrupt on a chip to a virtual IRQ
100 *
101 * @tc3589x_gpio: tc3589x_gpio_irq controller to operate on.
102 * @irq: index of the interrupt requested in the chip IRQs
103 *
104 * Useful for drivers to request their own IRQs.
105 */
106static int tc3589x_gpio_irq_get_virq(struct tc3589x_gpio *tc3589x_gpio,
107 int irq)
108{
109 if (!tc3589x_gpio)
110 return -EINVAL;
111
112 return irq_create_mapping(tc3589x_gpio->domain, irq);
113}
114
Sundar Iyer20406eb2010-12-13 09:33:14 +0530115static int tc3589x_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200116{
Sundar Iyer20406eb2010-12-13 09:33:14 +0530117 struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200118
Lee Jonesefe4c942012-09-07 12:14:58 +0100119 return tc3589x_gpio_irq_get_virq(tc3589x_gpio, offset);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200120}
121
122static struct gpio_chip template_chip = {
Sundar Iyer20406eb2010-12-13 09:33:14 +0530123 .label = "tc3589x",
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200124 .owner = THIS_MODULE,
Sundar Iyer20406eb2010-12-13 09:33:14 +0530125 .direction_input = tc3589x_gpio_direction_input,
126 .get = tc3589x_gpio_get,
127 .direction_output = tc3589x_gpio_direction_output,
128 .set = tc3589x_gpio_set,
129 .to_irq = tc3589x_gpio_to_irq,
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200130 .can_sleep = 1,
131};
132
Lennert Buytenhek33fcc1b2011-01-12 17:00:19 -0800133static int tc3589x_gpio_irq_set_type(struct irq_data *d, unsigned int type)
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200134{
Lennert Buytenhek33fcc1b2011-01-12 17:00:19 -0800135 struct tc3589x_gpio *tc3589x_gpio = irq_data_get_irq_chip_data(d);
Lee Jonesefe4c942012-09-07 12:14:58 +0100136 int offset = d->hwirq;
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200137 int regoffset = offset / 8;
138 int mask = 1 << (offset % 8);
139
140 if (type == IRQ_TYPE_EDGE_BOTH) {
Sundar Iyer20406eb2010-12-13 09:33:14 +0530141 tc3589x_gpio->regs[REG_IBE][regoffset] |= mask;
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200142 return 0;
143 }
144
Sundar Iyer20406eb2010-12-13 09:33:14 +0530145 tc3589x_gpio->regs[REG_IBE][regoffset] &= ~mask;
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200146
147 if (type == IRQ_TYPE_LEVEL_LOW || type == IRQ_TYPE_LEVEL_HIGH)
Sundar Iyer20406eb2010-12-13 09:33:14 +0530148 tc3589x_gpio->regs[REG_IS][regoffset] |= mask;
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200149 else
Sundar Iyer20406eb2010-12-13 09:33:14 +0530150 tc3589x_gpio->regs[REG_IS][regoffset] &= ~mask;
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200151
152 if (type == IRQ_TYPE_EDGE_RISING || type == IRQ_TYPE_LEVEL_HIGH)
Sundar Iyer20406eb2010-12-13 09:33:14 +0530153 tc3589x_gpio->regs[REG_IEV][regoffset] |= mask;
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200154 else
Sundar Iyer20406eb2010-12-13 09:33:14 +0530155 tc3589x_gpio->regs[REG_IEV][regoffset] &= ~mask;
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200156
157 return 0;
158}
159
Lennert Buytenhek33fcc1b2011-01-12 17:00:19 -0800160static void tc3589x_gpio_irq_lock(struct irq_data *d)
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200161{
Lennert Buytenhek33fcc1b2011-01-12 17:00:19 -0800162 struct tc3589x_gpio *tc3589x_gpio = irq_data_get_irq_chip_data(d);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200163
Sundar Iyer20406eb2010-12-13 09:33:14 +0530164 mutex_lock(&tc3589x_gpio->irq_lock);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200165}
166
Lennert Buytenhek33fcc1b2011-01-12 17:00:19 -0800167static void tc3589x_gpio_irq_sync_unlock(struct irq_data *d)
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200168{
Lennert Buytenhek33fcc1b2011-01-12 17:00:19 -0800169 struct tc3589x_gpio *tc3589x_gpio = irq_data_get_irq_chip_data(d);
Sundar Iyer20406eb2010-12-13 09:33:14 +0530170 struct tc3589x *tc3589x = tc3589x_gpio->tc3589x;
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200171 static const u8 regmap[] = {
Sundar Iyer20406eb2010-12-13 09:33:14 +0530172 [REG_IBE] = TC3589x_GPIOIBE0,
173 [REG_IEV] = TC3589x_GPIOIEV0,
174 [REG_IS] = TC3589x_GPIOIS0,
175 [REG_IE] = TC3589x_GPIOIE0,
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200176 };
177 int i, j;
178
179 for (i = 0; i < CACHE_NR_REGS; i++) {
180 for (j = 0; j < CACHE_NR_BANKS; j++) {
Sundar Iyer20406eb2010-12-13 09:33:14 +0530181 u8 old = tc3589x_gpio->oldregs[i][j];
182 u8 new = tc3589x_gpio->regs[i][j];
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200183
184 if (new == old)
185 continue;
186
Sundar Iyer20406eb2010-12-13 09:33:14 +0530187 tc3589x_gpio->oldregs[i][j] = new;
188 tc3589x_reg_write(tc3589x, regmap[i] + j * 8, new);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200189 }
190 }
191
Sundar Iyer20406eb2010-12-13 09:33:14 +0530192 mutex_unlock(&tc3589x_gpio->irq_lock);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200193}
194
Lennert Buytenhek33fcc1b2011-01-12 17:00:19 -0800195static void tc3589x_gpio_irq_mask(struct irq_data *d)
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200196{
Lennert Buytenhek33fcc1b2011-01-12 17:00:19 -0800197 struct tc3589x_gpio *tc3589x_gpio = irq_data_get_irq_chip_data(d);
Lee Jonesefe4c942012-09-07 12:14:58 +0100198 int offset = d->hwirq;
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200199 int regoffset = offset / 8;
200 int mask = 1 << (offset % 8);
201
Sundar Iyer20406eb2010-12-13 09:33:14 +0530202 tc3589x_gpio->regs[REG_IE][regoffset] &= ~mask;
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200203}
204
Lennert Buytenhek33fcc1b2011-01-12 17:00:19 -0800205static void tc3589x_gpio_irq_unmask(struct irq_data *d)
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200206{
Lennert Buytenhek33fcc1b2011-01-12 17:00:19 -0800207 struct tc3589x_gpio *tc3589x_gpio = irq_data_get_irq_chip_data(d);
Lee Jonesefe4c942012-09-07 12:14:58 +0100208 int offset = d->hwirq;
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200209 int regoffset = offset / 8;
210 int mask = 1 << (offset % 8);
211
Sundar Iyer20406eb2010-12-13 09:33:14 +0530212 tc3589x_gpio->regs[REG_IE][regoffset] |= mask;
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200213}
214
Sundar Iyer20406eb2010-12-13 09:33:14 +0530215static struct irq_chip tc3589x_gpio_irq_chip = {
216 .name = "tc3589x-gpio",
Lennert Buytenhek33fcc1b2011-01-12 17:00:19 -0800217 .irq_bus_lock = tc3589x_gpio_irq_lock,
218 .irq_bus_sync_unlock = tc3589x_gpio_irq_sync_unlock,
219 .irq_mask = tc3589x_gpio_irq_mask,
220 .irq_unmask = tc3589x_gpio_irq_unmask,
221 .irq_set_type = tc3589x_gpio_irq_set_type,
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200222};
223
Sundar Iyer20406eb2010-12-13 09:33:14 +0530224static irqreturn_t tc3589x_gpio_irq(int irq, void *dev)
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200225{
Sundar Iyer20406eb2010-12-13 09:33:14 +0530226 struct tc3589x_gpio *tc3589x_gpio = dev;
227 struct tc3589x *tc3589x = tc3589x_gpio->tc3589x;
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200228 u8 status[CACHE_NR_BANKS];
229 int ret;
230 int i;
231
Sundar Iyer20406eb2010-12-13 09:33:14 +0530232 ret = tc3589x_block_read(tc3589x, TC3589x_GPIOMIS0,
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200233 ARRAY_SIZE(status), status);
234 if (ret < 0)
235 return IRQ_NONE;
236
237 for (i = 0; i < ARRAY_SIZE(status); i++) {
238 unsigned int stat = status[i];
239 if (!stat)
240 continue;
241
242 while (stat) {
243 int bit = __ffs(stat);
244 int line = i * 8 + bit;
Lee Jonesefe4c942012-09-07 12:14:58 +0100245 int virq = tc3589x_gpio_irq_get_virq(tc3589x_gpio, line);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200246
Lee Jonesefe4c942012-09-07 12:14:58 +0100247 handle_nested_irq(virq);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200248 stat &= ~(1 << bit);
249 }
250
Sundar Iyer20406eb2010-12-13 09:33:14 +0530251 tc3589x_reg_write(tc3589x, TC3589x_GPIOIC0 + i, status[i]);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200252 }
253
254 return IRQ_HANDLED;
255}
256
Lee Jonesefe4c942012-09-07 12:14:58 +0100257static int tc3589x_gpio_irq_map(struct irq_domain *d, unsigned int virq,
258 irq_hw_number_t hwirq)
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200259{
Lee Jonesefe4c942012-09-07 12:14:58 +0100260 struct tc3589x *tc3589x_gpio = d->host_data;
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200261
Lee Jonesefe4c942012-09-07 12:14:58 +0100262 irq_set_chip_data(virq, tc3589x_gpio);
263 irq_set_chip_and_handler(virq, &tc3589x_gpio_irq_chip,
264 handle_simple_irq);
265 irq_set_nested_thread(virq, 1);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200266#ifdef CONFIG_ARM
Lee Jonesefe4c942012-09-07 12:14:58 +0100267 set_irq_flags(virq, IRQF_VALID);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200268#else
Lee Jonesefe4c942012-09-07 12:14:58 +0100269 irq_set_noprobe(virq);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200270#endif
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200271
272 return 0;
273}
274
Lee Jonesefe4c942012-09-07 12:14:58 +0100275static void tc3589x_gpio_irq_unmap(struct irq_domain *d, unsigned int virq)
276{
277#ifdef CONFIG_ARM
278 set_irq_flags(virq, 0);
279#endif
280 irq_set_chip_and_handler(virq, NULL, NULL);
281 irq_set_chip_data(virq, NULL);
282}
283
284static struct irq_domain_ops tc3589x_irq_ops = {
285 .map = tc3589x_gpio_irq_map,
286 .unmap = tc3589x_gpio_irq_unmap,
287 .xlate = irq_domain_xlate_twocell,
288};
289
Lee Jones3113e672012-09-07 12:14:59 +0100290static int tc3589x_gpio_irq_init(struct tc3589x_gpio *tc3589x_gpio,
291 struct device_node *np)
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200292{
Sundar Iyer20406eb2010-12-13 09:33:14 +0530293 int base = tc3589x_gpio->irq_base;
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200294
Linus Walleija362605b2012-10-16 19:43:53 +0200295 /*
296 * If this results in a linear domain, irq_create_mapping() will
297 * take care of allocating IRQ descriptors at runtime. When a base
298 * is provided, the IRQ descriptors will be allocated when the
299 * domain is instantiated.
300 */
301 tc3589x_gpio->domain = irq_domain_add_simple(np,
302 tc3589x_gpio->chip.ngpio, base, &tc3589x_irq_ops,
303 tc3589x_gpio);
Lee Jonesefe4c942012-09-07 12:14:58 +0100304 if (!tc3589x_gpio->domain) {
305 dev_err(tc3589x_gpio->dev, "Failed to create irqdomain\n");
306 return -ENOSYS;
307 }
308
309 return 0;
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200310}
311
Bill Pemberton38363092012-11-19 13:22:34 -0500312static int tc3589x_gpio_probe(struct platform_device *pdev)
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200313{
Sundar Iyer20406eb2010-12-13 09:33:14 +0530314 struct tc3589x *tc3589x = dev_get_drvdata(pdev->dev.parent);
315 struct tc3589x_gpio_platform_data *pdata;
Lee Jones3113e672012-09-07 12:14:59 +0100316 struct device_node *np = pdev->dev.of_node;
Sundar Iyer20406eb2010-12-13 09:33:14 +0530317 struct tc3589x_gpio *tc3589x_gpio;
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200318 int ret;
319 int irq;
320
Sundar Iyer20406eb2010-12-13 09:33:14 +0530321 pdata = tc3589x->pdata->gpio;
Lee Jones3113e672012-09-07 12:14:59 +0100322
323 if (!(pdata || np)) {
324 dev_err(&pdev->dev, "No platform data or Device Tree found\n");
325 return -EINVAL;
326 }
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200327
328 irq = platform_get_irq(pdev, 0);
329 if (irq < 0)
330 return irq;
331
Sundar Iyer20406eb2010-12-13 09:33:14 +0530332 tc3589x_gpio = kzalloc(sizeof(struct tc3589x_gpio), GFP_KERNEL);
333 if (!tc3589x_gpio)
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200334 return -ENOMEM;
335
Sundar Iyer20406eb2010-12-13 09:33:14 +0530336 mutex_init(&tc3589x_gpio->irq_lock);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200337
Sundar Iyer20406eb2010-12-13 09:33:14 +0530338 tc3589x_gpio->dev = &pdev->dev;
339 tc3589x_gpio->tc3589x = tc3589x;
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200340
Sundar Iyer20406eb2010-12-13 09:33:14 +0530341 tc3589x_gpio->chip = template_chip;
342 tc3589x_gpio->chip.ngpio = tc3589x->num_gpio;
343 tc3589x_gpio->chip.dev = &pdev->dev;
Lee Jones3113e672012-09-07 12:14:59 +0100344 tc3589x_gpio->chip.base = (pdata) ? pdata->gpio_base : -1;
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200345
Lee Jones3113e672012-09-07 12:14:59 +0100346#ifdef CONFIG_OF_GPIO
347 tc3589x_gpio->chip.of_node = np;
348#endif
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200349
Lee Jonesefe4c942012-09-07 12:14:58 +0100350 tc3589x_gpio->irq_base = tc3589x->irq_base ?
351 tc3589x->irq_base + TC3589x_INT_GPIO(0) : 0;
352
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200353 /* Bring the GPIO module out of reset */
Sundar Iyer20406eb2010-12-13 09:33:14 +0530354 ret = tc3589x_set_bits(tc3589x, TC3589x_RSTCTRL,
355 TC3589x_RSTCTRL_GPIRST, 0);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200356 if (ret < 0)
357 goto out_free;
358
Lee Jones3113e672012-09-07 12:14:59 +0100359 ret = tc3589x_gpio_irq_init(tc3589x_gpio, np);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200360 if (ret)
361 goto out_free;
362
Sundar Iyer20406eb2010-12-13 09:33:14 +0530363 ret = request_threaded_irq(irq, NULL, tc3589x_gpio_irq, IRQF_ONESHOT,
364 "tc3589x-gpio", tc3589x_gpio);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200365 if (ret) {
366 dev_err(&pdev->dev, "unable to get irq: %d\n", ret);
Lee Jonesefe4c942012-09-07 12:14:58 +0100367 goto out_free;
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200368 }
369
Sundar Iyer20406eb2010-12-13 09:33:14 +0530370 ret = gpiochip_add(&tc3589x_gpio->chip);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200371 if (ret) {
372 dev_err(&pdev->dev, "unable to add gpiochip: %d\n", ret);
373 goto out_freeirq;
374 }
375
Lee Jones3113e672012-09-07 12:14:59 +0100376 if (pdata && pdata->setup)
Sundar Iyer20406eb2010-12-13 09:33:14 +0530377 pdata->setup(tc3589x, tc3589x_gpio->chip.base);
Rabin Vincentf0a7a982010-09-13 13:04:02 +0100378
Sundar Iyer20406eb2010-12-13 09:33:14 +0530379 platform_set_drvdata(pdev, tc3589x_gpio);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200380
381 return 0;
382
383out_freeirq:
Sundar Iyer20406eb2010-12-13 09:33:14 +0530384 free_irq(irq, tc3589x_gpio);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200385out_free:
Sundar Iyer20406eb2010-12-13 09:33:14 +0530386 kfree(tc3589x_gpio);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200387 return ret;
388}
389
Bill Pemberton206210c2012-11-19 13:25:50 -0500390static int tc3589x_gpio_remove(struct platform_device *pdev)
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200391{
Sundar Iyer20406eb2010-12-13 09:33:14 +0530392 struct tc3589x_gpio *tc3589x_gpio = platform_get_drvdata(pdev);
393 struct tc3589x *tc3589x = tc3589x_gpio->tc3589x;
394 struct tc3589x_gpio_platform_data *pdata = tc3589x->pdata->gpio;
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200395 int irq = platform_get_irq(pdev, 0);
396 int ret;
397
Lee Jones3113e672012-09-07 12:14:59 +0100398 if (pdata && pdata->remove)
Sundar Iyer20406eb2010-12-13 09:33:14 +0530399 pdata->remove(tc3589x, tc3589x_gpio->chip.base);
Rabin Vincentf0a7a982010-09-13 13:04:02 +0100400
Sundar Iyer20406eb2010-12-13 09:33:14 +0530401 ret = gpiochip_remove(&tc3589x_gpio->chip);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200402 if (ret < 0) {
Sundar Iyer20406eb2010-12-13 09:33:14 +0530403 dev_err(tc3589x_gpio->dev,
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200404 "unable to remove gpiochip: %d\n", ret);
405 return ret;
406 }
407
Sundar Iyer20406eb2010-12-13 09:33:14 +0530408 free_irq(irq, tc3589x_gpio);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200409
410 platform_set_drvdata(pdev, NULL);
Sundar Iyer20406eb2010-12-13 09:33:14 +0530411 kfree(tc3589x_gpio);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200412
413 return 0;
414}
415
Sundar Iyer20406eb2010-12-13 09:33:14 +0530416static struct platform_driver tc3589x_gpio_driver = {
417 .driver.name = "tc3589x-gpio",
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200418 .driver.owner = THIS_MODULE,
Sundar Iyer20406eb2010-12-13 09:33:14 +0530419 .probe = tc3589x_gpio_probe,
Bill Pemberton8283c4f2012-11-19 13:20:08 -0500420 .remove = tc3589x_gpio_remove,
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200421};
422
Sundar Iyer20406eb2010-12-13 09:33:14 +0530423static int __init tc3589x_gpio_init(void)
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200424{
Sundar Iyer20406eb2010-12-13 09:33:14 +0530425 return platform_driver_register(&tc3589x_gpio_driver);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200426}
Sundar Iyer20406eb2010-12-13 09:33:14 +0530427subsys_initcall(tc3589x_gpio_init);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200428
Sundar Iyer20406eb2010-12-13 09:33:14 +0530429static void __exit tc3589x_gpio_exit(void)
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200430{
Sundar Iyer20406eb2010-12-13 09:33:14 +0530431 platform_driver_unregister(&tc3589x_gpio_driver);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200432}
Sundar Iyer20406eb2010-12-13 09:33:14 +0530433module_exit(tc3589x_gpio_exit);
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200434
435MODULE_LICENSE("GPL v2");
Sundar Iyer20406eb2010-12-13 09:33:14 +0530436MODULE_DESCRIPTION("TC3589x GPIO driver");
Rabin Vincentd88b25b2010-05-10 23:43:47 +0200437MODULE_AUTHOR("Hanumath Prasad, Rabin Vincent");