blob: 8b88ca2eda9c6cc0621eb13230fbad5bb39d76f3 [file] [log] [blame]
David Brownelle9d359472008-10-20 23:51:46 +02001/*
Grant Likelyc103de22011-06-04 18:38:28 -06002 * Access to GPIOs on TWL4030/TPS659x0 chips
David Brownelle9d359472008-10-20 23:51:46 +02003 *
4 * Copyright (C) 2006-2007 Texas Instruments, Inc.
5 * Copyright (C) 2006 MontaVista Software, Inc.
6 *
7 * Code re-arranged and cleaned up by:
8 * Syed Mohammed Khasim <x0khasim@ti.com>
9 *
10 * Initial Code:
11 * Andy Lowe / Nishanth Menon
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 */
27
28#include <linux/module.h>
29#include <linux/init.h>
30#include <linux/interrupt.h>
31#include <linux/kthread.h>
32#include <linux/irq.h>
33#include <linux/gpio.h>
34#include <linux/platform_device.h>
Benoit Coussonb8589e22012-02-29 22:51:32 +010035#include <linux/of.h>
36#include <linux/irqdomain.h>
David Brownelle9d359472008-10-20 23:51:46 +020037
Santosh Shilimkarb07682b2009-12-13 20:05:51 +010038#include <linux/i2c/twl.h>
David Brownelle9d359472008-10-20 23:51:46 +020039
David Brownelle9d359472008-10-20 23:51:46 +020040/*
41 * The GPIO "subchip" supports 18 GPIOs which can be configured as
42 * inputs or outputs, with pullups or pulldowns on each pin. Each
43 * GPIO can trigger interrupts on either or both edges.
44 *
45 * GPIO interrupts can be fed to either of two IRQ lines; this is
46 * intended to support multiple hosts.
47 *
48 * There are also two LED pins used sometimes as output-only GPIOs.
49 */
50
David Brownelle9d359472008-10-20 23:51:46 +020051/* genirq interfaces are not available to modules */
52#ifdef MODULE
53#define is_module() true
54#else
55#define is_module() false
56#endif
57
58/* GPIO_CTRL Fields */
59#define MASK_GPIO_CTRL_GPIO0CD1 BIT(0)
60#define MASK_GPIO_CTRL_GPIO1CD2 BIT(1)
61#define MASK_GPIO_CTRL_GPIO_ON BIT(2)
62
63/* Mask for GPIO registers when aggregated into a 32-bit integer */
64#define GPIO_32_MASK 0x0003ffff
65
Peter Ujfalusi72c79012012-12-06 10:52:05 +000066struct gpio_twl4030_priv {
67 struct gpio_chip gpio_chip;
Peter Ujfalusic111fea2012-12-20 10:44:11 +010068 struct mutex mutex;
Peter Ujfalusi72c79012012-12-06 10:52:05 +000069 int irq_base;
70
Peter Ujfalusic111fea2012-12-20 10:44:11 +010071 /* Bitfields for state caching */
Peter Ujfalusi72c79012012-12-06 10:52:05 +000072 unsigned int usage_count;
Peter Ujfalusic111fea2012-12-20 10:44:11 +010073 unsigned int direction;
74 unsigned int out_state;
Peter Ujfalusi72c79012012-12-06 10:52:05 +000075};
David Brownelle9d359472008-10-20 23:51:46 +020076
77/*----------------------------------------------------------------------*/
78
Peter Ujfalusi72c79012012-12-06 10:52:05 +000079static inline struct gpio_twl4030_priv *to_gpio_twl4030(struct gpio_chip *chip)
80{
81 return container_of(chip, struct gpio_twl4030_priv, gpio_chip);
82}
83
David Brownelle9d359472008-10-20 23:51:46 +020084/*
85 * To configure TWL4030 GPIO module registers
86 */
87static inline int gpio_twl4030_write(u8 address, u8 data)
88{
Balaji T Kfc7b92f2009-12-13 21:23:33 +010089 return twl_i2c_write_u8(TWL4030_MODULE_GPIO, data, address);
David Brownelle9d359472008-10-20 23:51:46 +020090}
91
92/*----------------------------------------------------------------------*/
93
94/*
Peter Ujfalusi9859eb92012-11-13 10:35:13 +010095 * LED register offsets from TWL_MODULE_LED base
David Brownelle9d359472008-10-20 23:51:46 +020096 * PWMs A and B are dedicated to LEDs A and B, respectively.
97 */
98
Peter Ujfalusi9859eb92012-11-13 10:35:13 +010099#define TWL4030_LED_LEDEN_REG 0x00
100#define TWL4030_PWMAON_REG 0x01
101#define TWL4030_PWMAOFF_REG 0x02
102#define TWL4030_PWMBON_REG 0x03
103#define TWL4030_PWMBOFF_REG 0x04
David Brownelle9d359472008-10-20 23:51:46 +0200104
105/* LEDEN bits */
106#define LEDEN_LEDAON BIT(0)
107#define LEDEN_LEDBON BIT(1)
108#define LEDEN_LEDAEXT BIT(2)
109#define LEDEN_LEDBEXT BIT(3)
110#define LEDEN_LEDAPWM BIT(4)
111#define LEDEN_LEDBPWM BIT(5)
112#define LEDEN_PWM_LENGTHA BIT(6)
113#define LEDEN_PWM_LENGTHB BIT(7)
114
David Brownelle9d359472008-10-20 23:51:46 +0200115#define PWMxON_LENGTH BIT(7)
116
117/*----------------------------------------------------------------------*/
118
119/*
120 * To read a TWL4030 GPIO module register
121 */
122static inline int gpio_twl4030_read(u8 address)
123{
124 u8 data;
125 int ret = 0;
126
Balaji T Kfc7b92f2009-12-13 21:23:33 +0100127 ret = twl_i2c_read_u8(TWL4030_MODULE_GPIO, &data, address);
David Brownelle9d359472008-10-20 23:51:46 +0200128 return (ret < 0) ? ret : data;
129}
130
131/*----------------------------------------------------------------------*/
132
Peter Ujfalusic111fea2012-12-20 10:44:11 +0100133static u8 cached_leden;
David Brownelle9d359472008-10-20 23:51:46 +0200134
135/* The LED lines are open drain outputs ... a FET pulls to GND, so an
136 * external pullup is needed. We could also expose the integrated PWM
137 * as a LED brightness control; we initialize it as "always on".
138 */
139static void twl4030_led_set_value(int led, int value)
140{
141 u8 mask = LEDEN_LEDAON | LEDEN_LEDAPWM;
142 int status;
143
144 if (led)
145 mask <<= 1;
146
David Brownelle9d359472008-10-20 23:51:46 +0200147 if (value)
148 cached_leden &= ~mask;
149 else
150 cached_leden |= mask;
Balaji T Kfc7b92f2009-12-13 21:23:33 +0100151 status = twl_i2c_write_u8(TWL4030_MODULE_LED, cached_leden,
Peter Ujfalusi9859eb92012-11-13 10:35:13 +0100152 TWL4030_LED_LEDEN_REG);
David Brownelle9d359472008-10-20 23:51:46 +0200153}
154
155static int twl4030_set_gpio_direction(int gpio, int is_input)
156{
157 u8 d_bnk = gpio >> 3;
158 u8 d_msk = BIT(gpio & 0x7);
159 u8 reg = 0;
160 u8 base = REG_GPIODATADIR1 + d_bnk;
161 int ret = 0;
162
David Brownelle9d359472008-10-20 23:51:46 +0200163 ret = gpio_twl4030_read(base);
164 if (ret >= 0) {
165 if (is_input)
166 reg = ret & ~d_msk;
167 else
168 reg = ret | d_msk;
169
170 ret = gpio_twl4030_write(base, reg);
171 }
David Brownelle9d359472008-10-20 23:51:46 +0200172 return ret;
173}
174
175static int twl4030_set_gpio_dataout(int gpio, int enable)
176{
177 u8 d_bnk = gpio >> 3;
178 u8 d_msk = BIT(gpio & 0x7);
179 u8 base = 0;
180
181 if (enable)
182 base = REG_SETGPIODATAOUT1 + d_bnk;
183 else
184 base = REG_CLEARGPIODATAOUT1 + d_bnk;
185
186 return gpio_twl4030_write(base, d_msk);
187}
188
189static int twl4030_get_gpio_datain(int gpio)
190{
191 u8 d_bnk = gpio >> 3;
192 u8 d_off = gpio & 0x7;
193 u8 base = 0;
194 int ret = 0;
195
David Brownelle9d359472008-10-20 23:51:46 +0200196 base = REG_GPIODATAIN1 + d_bnk;
197 ret = gpio_twl4030_read(base);
198 if (ret > 0)
199 ret = (ret >> d_off) & 0x1;
200
201 return ret;
202}
203
David Brownelle9d359472008-10-20 23:51:46 +0200204/*----------------------------------------------------------------------*/
205
206static int twl_request(struct gpio_chip *chip, unsigned offset)
207{
Peter Ujfalusi72c79012012-12-06 10:52:05 +0000208 struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip);
David Brownelle9d359472008-10-20 23:51:46 +0200209 int status = 0;
210
Peter Ujfalusic111fea2012-12-20 10:44:11 +0100211 mutex_lock(&priv->mutex);
David Brownelle9d359472008-10-20 23:51:46 +0200212
213 /* Support the two LED outputs as output-only GPIOs. */
214 if (offset >= TWL4030_GPIO_MAX) {
215 u8 ledclr_mask = LEDEN_LEDAON | LEDEN_LEDAEXT
216 | LEDEN_LEDAPWM | LEDEN_PWM_LENGTHA;
Peter Ujfalusi9859eb92012-11-13 10:35:13 +0100217 u8 reg = TWL4030_PWMAON_REG;
David Brownelle9d359472008-10-20 23:51:46 +0200218
219 offset -= TWL4030_GPIO_MAX;
220 if (offset) {
221 ledclr_mask <<= 1;
Peter Ujfalusi9859eb92012-11-13 10:35:13 +0100222 reg = TWL4030_PWMBON_REG;
David Brownelle9d359472008-10-20 23:51:46 +0200223 }
224
225 /* initialize PWM to always-drive */
Peter Ujfalusi9859eb92012-11-13 10:35:13 +0100226 /* Configure PWM OFF register first */
227 status = twl_i2c_write_u8(TWL4030_MODULE_LED, 0x7f, reg + 1);
David Brownelle9d359472008-10-20 23:51:46 +0200228 if (status < 0)
229 goto done;
Peter Ujfalusi9859eb92012-11-13 10:35:13 +0100230
231 /* Followed by PWM ON register */
232 status = twl_i2c_write_u8(TWL4030_MODULE_LED, 0x7f, reg);
David Brownelle9d359472008-10-20 23:51:46 +0200233 if (status < 0)
234 goto done;
235
236 /* init LED to not-driven (high) */
Peter Ujfalusi9859eb92012-11-13 10:35:13 +0100237 status = twl_i2c_read_u8(TWL4030_MODULE_LED, &cached_leden,
238 TWL4030_LED_LEDEN_REG);
David Brownelle9d359472008-10-20 23:51:46 +0200239 if (status < 0)
240 goto done;
241 cached_leden &= ~ledclr_mask;
Peter Ujfalusi9859eb92012-11-13 10:35:13 +0100242 status = twl_i2c_write_u8(TWL4030_MODULE_LED, cached_leden,
243 TWL4030_LED_LEDEN_REG);
David Brownelle9d359472008-10-20 23:51:46 +0200244 if (status < 0)
245 goto done;
246
247 status = 0;
248 goto done;
249 }
250
251 /* on first use, turn GPIO module "on" */
Peter Ujfalusi72c79012012-12-06 10:52:05 +0000252 if (!priv->usage_count) {
David Brownelle9d359472008-10-20 23:51:46 +0200253 struct twl4030_gpio_platform_data *pdata;
254 u8 value = MASK_GPIO_CTRL_GPIO_ON;
255
256 /* optionally have the first two GPIOs switch vMMC1
257 * and vMMC2 power supplies based on card presence.
258 */
Jingoo Hane56aee12013-07-30 17:08:05 +0900259 pdata = dev_get_platdata(chip->dev);
Benoit Coussonb8589e22012-02-29 22:51:32 +0100260 if (pdata)
261 value |= pdata->mmc_cd & 0x03;
David Brownelle9d359472008-10-20 23:51:46 +0200262
263 status = gpio_twl4030_write(REG_GPIO_CTRL, value);
264 }
265
David Brownelle9d359472008-10-20 23:51:46 +0200266done:
Peter Ujfalusi72c79012012-12-06 10:52:05 +0000267 if (!status)
268 priv->usage_count |= BIT(offset);
269
Peter Ujfalusic111fea2012-12-20 10:44:11 +0100270 mutex_unlock(&priv->mutex);
David Brownelle9d359472008-10-20 23:51:46 +0200271 return status;
272}
273
274static void twl_free(struct gpio_chip *chip, unsigned offset)
275{
Peter Ujfalusi72c79012012-12-06 10:52:05 +0000276 struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip);
277
Peter Ujfalusic111fea2012-12-20 10:44:11 +0100278 mutex_lock(&priv->mutex);
David Brownelle9d359472008-10-20 23:51:46 +0200279 if (offset >= TWL4030_GPIO_MAX) {
280 twl4030_led_set_value(offset - TWL4030_GPIO_MAX, 1);
Peter Ujfalusic111fea2012-12-20 10:44:11 +0100281 goto out;
David Brownelle9d359472008-10-20 23:51:46 +0200282 }
283
Peter Ujfalusi72c79012012-12-06 10:52:05 +0000284 priv->usage_count &= ~BIT(offset);
David Brownelle9d359472008-10-20 23:51:46 +0200285
286 /* on last use, switch off GPIO module */
Peter Ujfalusi72c79012012-12-06 10:52:05 +0000287 if (!priv->usage_count)
David Brownelle9d359472008-10-20 23:51:46 +0200288 gpio_twl4030_write(REG_GPIO_CTRL, 0x0);
289
Peter Ujfalusic111fea2012-12-20 10:44:11 +0100290out:
291 mutex_unlock(&priv->mutex);
David Brownelle9d359472008-10-20 23:51:46 +0200292}
293
294static int twl_direction_in(struct gpio_chip *chip, unsigned offset)
295{
Peter Ujfalusic111fea2012-12-20 10:44:11 +0100296 struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip);
297 int ret;
298
299 mutex_lock(&priv->mutex);
300 if (offset < TWL4030_GPIO_MAX)
301 ret = twl4030_set_gpio_direction(offset, 1);
302 else
Roger Quadrosf5837ec12013-12-05 11:23:35 +0200303 ret = -EINVAL; /* LED outputs can't be set as input */
Peter Ujfalusic111fea2012-12-20 10:44:11 +0100304
305 if (!ret)
306 priv->direction &= ~BIT(offset);
307
308 mutex_unlock(&priv->mutex);
309
310 return ret;
David Brownelle9d359472008-10-20 23:51:46 +0200311}
312
313static int twl_get(struct gpio_chip *chip, unsigned offset)
314{
Peter Ujfalusi72c79012012-12-06 10:52:05 +0000315 struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip);
Peter Ujfalusic111fea2012-12-20 10:44:11 +0100316 int ret;
David Brownelle9d359472008-10-20 23:51:46 +0200317 int status = 0;
318
Peter Ujfalusic111fea2012-12-20 10:44:11 +0100319 mutex_lock(&priv->mutex);
320 if (!(priv->usage_count & BIT(offset))) {
321 ret = -EPERM;
322 goto out;
David Brownelle9d359472008-10-20 23:51:46 +0200323 }
Peter Ujfalusic111fea2012-12-20 10:44:11 +0100324
325 if (priv->direction & BIT(offset))
326 status = priv->out_state & BIT(offset);
327 else
328 status = twl4030_get_gpio_datain(offset);
329
330 ret = (status <= 0) ? 0 : 1;
331out:
332 mutex_unlock(&priv->mutex);
333 return ret;
David Brownelle9d359472008-10-20 23:51:46 +0200334}
335
336static void twl_set(struct gpio_chip *chip, unsigned offset, int value)
337{
Peter Ujfalusic111fea2012-12-20 10:44:11 +0100338 struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip);
339
340 mutex_lock(&priv->mutex);
David Brownelle9d359472008-10-20 23:51:46 +0200341 if (offset < TWL4030_GPIO_MAX)
342 twl4030_set_gpio_dataout(offset, value);
343 else
344 twl4030_led_set_value(offset - TWL4030_GPIO_MAX, value);
Peter Ujfalusic111fea2012-12-20 10:44:11 +0100345
346 if (value)
347 priv->out_state |= BIT(offset);
348 else
349 priv->out_state &= ~BIT(offset);
350
351 mutex_unlock(&priv->mutex);
352}
353
354static int twl_direction_out(struct gpio_chip *chip, unsigned offset, int value)
355{
356 struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip);
Roger Quadrosf5837ec12013-12-05 11:23:35 +0200357 int ret = 0;
Peter Ujfalusic111fea2012-12-20 10:44:11 +0100358
359 mutex_lock(&priv->mutex);
Roger Quadrosf5837ec12013-12-05 11:23:35 +0200360 if (offset < TWL4030_GPIO_MAX) {
Tony Lindgren0b2aa8b2013-11-18 15:22:49 -0800361 ret = twl4030_set_gpio_direction(offset, 0);
Roger Quadrosf5837ec12013-12-05 11:23:35 +0200362 if (ret) {
363 mutex_unlock(&priv->mutex);
364 return ret;
365 }
366 }
367
368 /*
369 * LED gpios i.e. offset >= TWL4030_GPIO_MAX are always output
370 */
Peter Ujfalusic111fea2012-12-20 10:44:11 +0100371
372 priv->direction |= BIT(offset);
373 mutex_unlock(&priv->mutex);
374
375 twl_set(chip, offset, value);
376
Tony Lindgren0b2aa8b2013-11-18 15:22:49 -0800377 return ret;
David Brownelle9d359472008-10-20 23:51:46 +0200378}
379
380static int twl_to_irq(struct gpio_chip *chip, unsigned offset)
381{
Peter Ujfalusi72c79012012-12-06 10:52:05 +0000382 struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip);
383
384 return (priv->irq_base && (offset < TWL4030_GPIO_MAX))
385 ? (priv->irq_base + offset)
David Brownelle9d359472008-10-20 23:51:46 +0200386 : -EINVAL;
387}
388
Peter Ujfalusi72c79012012-12-06 10:52:05 +0000389static struct gpio_chip template_chip = {
David Brownelle9d359472008-10-20 23:51:46 +0200390 .label = "twl4030",
391 .owner = THIS_MODULE,
392 .request = twl_request,
393 .free = twl_free,
394 .direction_input = twl_direction_in,
395 .get = twl_get,
396 .direction_output = twl_direction_out,
397 .set = twl_set,
398 .to_irq = twl_to_irq,
Linus Walleij9fb1f392013-12-04 14:42:46 +0100399 .can_sleep = true,
David Brownelle9d359472008-10-20 23:51:46 +0200400};
401
402/*----------------------------------------------------------------------*/
403
Bill Pemberton38363092012-11-19 13:22:34 -0500404static int gpio_twl4030_pulls(u32 ups, u32 downs)
David Brownelle9d359472008-10-20 23:51:46 +0200405{
Peter Ujfalusi14591d82012-11-13 09:28:45 +0100406 u8 message[5];
David Brownelle9d359472008-10-20 23:51:46 +0200407 unsigned i, gpio_bit;
408
409 /* For most pins, a pulldown was enabled by default.
410 * We should have data that's specific to this board.
411 */
Peter Ujfalusi14591d82012-11-13 09:28:45 +0100412 for (gpio_bit = 1, i = 0; i < 5; i++) {
David Brownelle9d359472008-10-20 23:51:46 +0200413 u8 bit_mask;
414 unsigned j;
415
416 for (bit_mask = 0, j = 0; j < 8; j += 2, gpio_bit <<= 1) {
417 if (ups & gpio_bit)
418 bit_mask |= 1 << (j + 1);
419 else if (downs & gpio_bit)
420 bit_mask |= 1 << (j + 0);
421 }
422 message[i] = bit_mask;
423 }
424
Balaji T Kfc7b92f2009-12-13 21:23:33 +0100425 return twl_i2c_write(TWL4030_MODULE_GPIO, message,
David Brownelle9d359472008-10-20 23:51:46 +0200426 REG_GPIOPUPDCTR1, 5);
427}
428
Bill Pemberton38363092012-11-19 13:22:34 -0500429static int gpio_twl4030_debounce(u32 debounce, u8 mmc_cd)
David Brownellcabb3fc2009-01-06 14:42:26 -0800430{
Peter Ujfalusi14591d82012-11-13 09:28:45 +0100431 u8 message[3];
David Brownellcabb3fc2009-01-06 14:42:26 -0800432
433 /* 30 msec of debouncing is always used for MMC card detect,
434 * and is optional for everything else.
435 */
Peter Ujfalusi14591d82012-11-13 09:28:45 +0100436 message[0] = (debounce & 0xff) | (mmc_cd & 0x03);
David Brownellcabb3fc2009-01-06 14:42:26 -0800437 debounce >>= 8;
Peter Ujfalusi14591d82012-11-13 09:28:45 +0100438 message[1] = (debounce & 0xff);
David Brownellcabb3fc2009-01-06 14:42:26 -0800439 debounce >>= 8;
Peter Ujfalusi14591d82012-11-13 09:28:45 +0100440 message[2] = (debounce & 0x03);
David Brownellcabb3fc2009-01-06 14:42:26 -0800441
Balaji T Kfc7b92f2009-12-13 21:23:33 +0100442 return twl_i2c_write(TWL4030_MODULE_GPIO, message,
David Brownellcabb3fc2009-01-06 14:42:26 -0800443 REG_GPIO_DEBEN1, 3);
444}
445
David Brownelle9d359472008-10-20 23:51:46 +0200446static int gpio_twl4030_remove(struct platform_device *pdev);
447
Tony Lindgrenfd3a5d5b2013-11-18 15:22:50 -0800448static struct twl4030_gpio_platform_data *of_gpio_twl4030(struct device *dev,
449 struct twl4030_gpio_platform_data *pdata)
Florian Vaussardf74ce8f2012-09-05 09:46:25 +0200450{
451 struct twl4030_gpio_platform_data *omap_twl_info;
452
453 omap_twl_info = devm_kzalloc(dev, sizeof(*omap_twl_info), GFP_KERNEL);
454 if (!omap_twl_info)
455 return NULL;
456
Tony Lindgrenfd3a5d5b2013-11-18 15:22:50 -0800457 if (pdata)
458 *omap_twl_info = *pdata;
459
Florian Vaussardf74ce8f2012-09-05 09:46:25 +0200460 omap_twl_info->use_leds = of_property_read_bool(dev->of_node,
461 "ti,use-leds");
462
463 of_property_read_u32(dev->of_node, "ti,debounce",
464 &omap_twl_info->debounce);
465 of_property_read_u32(dev->of_node, "ti,mmc-cd",
466 (u32 *)&omap_twl_info->mmc_cd);
467 of_property_read_u32(dev->of_node, "ti,pullups",
468 &omap_twl_info->pullups);
469 of_property_read_u32(dev->of_node, "ti,pulldowns",
470 &omap_twl_info->pulldowns);
471
472 return omap_twl_info;
473}
474
Bill Pemberton38363092012-11-19 13:22:34 -0500475static int gpio_twl4030_probe(struct platform_device *pdev)
David Brownelle9d359472008-10-20 23:51:46 +0200476{
Jingoo Hane56aee12013-07-30 17:08:05 +0900477 struct twl4030_gpio_platform_data *pdata = dev_get_platdata(&pdev->dev);
Benoit Coussonb8589e22012-02-29 22:51:32 +0100478 struct device_node *node = pdev->dev.of_node;
Peter Ujfalusi72c79012012-12-06 10:52:05 +0000479 struct gpio_twl4030_priv *priv;
Benoit Cousson2d9dd992012-02-29 22:48:32 +0100480 int ret, irq_base;
David Brownelle9d359472008-10-20 23:51:46 +0200481
Peter Ujfalusi72c79012012-12-06 10:52:05 +0000482 priv = devm_kzalloc(&pdev->dev, sizeof(struct gpio_twl4030_priv),
483 GFP_KERNEL);
484 if (!priv)
485 return -ENOMEM;
486
David Brownelle9d359472008-10-20 23:51:46 +0200487 /* maybe setup IRQs */
Benoit Cousson2d9dd992012-02-29 22:48:32 +0100488 if (is_module()) {
489 dev_err(&pdev->dev, "can't dispatch IRQs from modules\n");
490 goto no_irqs;
David Brownelle9d359472008-10-20 23:51:46 +0200491 }
492
Benoit Cousson2d9dd992012-02-29 22:48:32 +0100493 irq_base = irq_alloc_descs(-1, 0, TWL4030_GPIO_MAX, 0);
494 if (irq_base < 0) {
495 dev_err(&pdev->dev, "Failed to alloc irq_descs\n");
496 return irq_base;
497 }
498
Benoit Coussonb8589e22012-02-29 22:51:32 +0100499 irq_domain_add_legacy(node, TWL4030_GPIO_MAX, irq_base, 0,
500 &irq_domain_simple_ops, NULL);
501
Benoit Cousson2d9dd992012-02-29 22:48:32 +0100502 ret = twl4030_sih_setup(&pdev->dev, TWL4030_MODULE_GPIO, irq_base);
503 if (ret < 0)
504 return ret;
505
Peter Ujfalusi72c79012012-12-06 10:52:05 +0000506 priv->irq_base = irq_base;
Benoit Cousson2d9dd992012-02-29 22:48:32 +0100507
David Brownelle9d359472008-10-20 23:51:46 +0200508no_irqs:
Peter Ujfalusi72c79012012-12-06 10:52:05 +0000509 priv->gpio_chip = template_chip;
510 priv->gpio_chip.base = -1;
511 priv->gpio_chip.ngpio = TWL4030_GPIO_MAX;
512 priv->gpio_chip.dev = &pdev->dev;
David Brownelle9d359472008-10-20 23:51:46 +0200513
Peter Ujfalusic111fea2012-12-20 10:44:11 +0100514 mutex_init(&priv->mutex);
515
Florian Vaussardf74ce8f2012-09-05 09:46:25 +0200516 if (node)
Tony Lindgrenfd3a5d5b2013-11-18 15:22:50 -0800517 pdata = of_gpio_twl4030(&pdev->dev, pdata);
Benoit Coussonb8589e22012-02-29 22:51:32 +0100518
Florian Vaussardf74ce8f2012-09-05 09:46:25 +0200519 if (pdata == NULL) {
520 dev_err(&pdev->dev, "Platform data is missing\n");
521 return -ENXIO;
Benoit Coussonb8589e22012-02-29 22:51:32 +0100522 }
David Brownelle9d359472008-10-20 23:51:46 +0200523
Florian Vaussardf74ce8f2012-09-05 09:46:25 +0200524 /*
525 * NOTE: boards may waste power if they don't set pullups
526 * and pulldowns correctly ... default for non-ULPI pins is
527 * pulldown, and some other pins may have external pullups
528 * or pulldowns. Careful!
529 */
530 ret = gpio_twl4030_pulls(pdata->pullups, pdata->pulldowns);
531 if (ret)
532 dev_dbg(&pdev->dev, "pullups %.05x %.05x --> %d\n",
533 pdata->pullups, pdata->pulldowns, ret);
534
535 ret = gpio_twl4030_debounce(pdata->debounce, pdata->mmc_cd);
536 if (ret)
537 dev_dbg(&pdev->dev, "debounce %.03x %.01x --> %d\n",
538 pdata->debounce, pdata->mmc_cd, ret);
539
540 /*
541 * NOTE: we assume VIBRA_CTL.VIBRA_EN, in MODULE_AUDIO_VOICE,
542 * is (still) clear if use_leds is set.
543 */
544 if (pdata->use_leds)
Peter Ujfalusi72c79012012-12-06 10:52:05 +0000545 priv->gpio_chip.ngpio += 2;
Florian Vaussardf74ce8f2012-09-05 09:46:25 +0200546
Peter Ujfalusi72c79012012-12-06 10:52:05 +0000547 ret = gpiochip_add(&priv->gpio_chip);
David Brownelle9d359472008-10-20 23:51:46 +0200548 if (ret < 0) {
Benoit Cousson2d9dd992012-02-29 22:48:32 +0100549 dev_err(&pdev->dev, "could not register gpiochip, %d\n", ret);
Peter Ujfalusi72c79012012-12-06 10:52:05 +0000550 priv->gpio_chip.ngpio = 0;
David Brownelle9d359472008-10-20 23:51:46 +0200551 gpio_twl4030_remove(pdev);
Tony Lindgrena940d9a2012-09-04 17:43:30 -0700552 goto out;
553 }
554
Peter Ujfalusi72c79012012-12-06 10:52:05 +0000555 platform_set_drvdata(pdev, priv);
Tony Lindgrena940d9a2012-09-04 17:43:30 -0700556
557 if (pdata && pdata->setup) {
David Brownelle9d359472008-10-20 23:51:46 +0200558 int status;
559
Peter Ujfalusi72c79012012-12-06 10:52:05 +0000560 status = pdata->setup(&pdev->dev, priv->gpio_chip.base,
561 TWL4030_GPIO_MAX);
David Brownelle9d359472008-10-20 23:51:46 +0200562 if (status)
563 dev_dbg(&pdev->dev, "setup --> %d\n", status);
564 }
565
Tony Lindgrena940d9a2012-09-04 17:43:30 -0700566out:
David Brownelle9d359472008-10-20 23:51:46 +0200567 return ret;
568}
569
Bill Pemberton206210c2012-11-19 13:25:50 -0500570/* Cannot use as gpio_twl4030_probe() calls us */
Mike Frysinger46c529c2009-10-26 16:50:06 -0700571static int gpio_twl4030_remove(struct platform_device *pdev)
David Brownelle9d359472008-10-20 23:51:46 +0200572{
Jingoo Hane56aee12013-07-30 17:08:05 +0900573 struct twl4030_gpio_platform_data *pdata = dev_get_platdata(&pdev->dev);
Peter Ujfalusi72c79012012-12-06 10:52:05 +0000574 struct gpio_twl4030_priv *priv = platform_get_drvdata(pdev);
David Brownelle9d359472008-10-20 23:51:46 +0200575 int status;
576
Benoit Coussonb8589e22012-02-29 22:51:32 +0100577 if (pdata && pdata->teardown) {
Peter Ujfalusi72c79012012-12-06 10:52:05 +0000578 status = pdata->teardown(&pdev->dev, priv->gpio_chip.base,
579 TWL4030_GPIO_MAX);
David Brownelle9d359472008-10-20 23:51:46 +0200580 if (status) {
581 dev_dbg(&pdev->dev, "teardown --> %d\n", status);
582 return status;
583 }
584 }
585
Peter Ujfalusi72c79012012-12-06 10:52:05 +0000586 status = gpiochip_remove(&priv->gpio_chip);
David Brownelle9d359472008-10-20 23:51:46 +0200587 if (status < 0)
588 return status;
589
590 if (is_module())
591 return 0;
592
593 /* REVISIT no support yet for deregistering all the IRQs */
594 WARN_ON(1);
595 return -EIO;
596}
597
Benoit Coussonb8589e22012-02-29 22:51:32 +0100598static const struct of_device_id twl_gpio_match[] = {
599 { .compatible = "ti,twl4030-gpio", },
600 { },
601};
602MODULE_DEVICE_TABLE(of, twl_gpio_match);
603
David Brownelle9d359472008-10-20 23:51:46 +0200604/* Note: this hardware lives inside an I2C-based multi-function device. */
605MODULE_ALIAS("platform:twl4030_gpio");
606
607static struct platform_driver gpio_twl4030_driver = {
Benoit Coussonb8589e22012-02-29 22:51:32 +0100608 .driver = {
609 .name = "twl4030_gpio",
610 .owner = THIS_MODULE,
Sachin Kamate5560af2013-09-28 17:34:09 +0530611 .of_match_table = twl_gpio_match,
Benoit Coussonb8589e22012-02-29 22:51:32 +0100612 },
David Brownelle9d359472008-10-20 23:51:46 +0200613 .probe = gpio_twl4030_probe,
Mike Frysinger46c529c2009-10-26 16:50:06 -0700614 .remove = gpio_twl4030_remove,
David Brownelle9d359472008-10-20 23:51:46 +0200615};
616
617static int __init gpio_twl4030_init(void)
618{
619 return platform_driver_register(&gpio_twl4030_driver);
620}
621subsys_initcall(gpio_twl4030_init);
622
623static void __exit gpio_twl4030_exit(void)
624{
625 platform_driver_unregister(&gpio_twl4030_driver);
626}
627module_exit(gpio_twl4030_exit);
628
629MODULE_AUTHOR("Texas Instruments, Inc.");
630MODULE_DESCRIPTION("GPIO interface for TWL4030");
631MODULE_LICENSE("GPL");