Commit | Line | Data |
---|---|---|
e9d35947 | 1 | /* |
c103de24 | 2 | * Access to GPIOs on TWL4030/TPS659x0 chips |
e9d35947 DB |
3 | * |
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> | |
b8589e2a BC |
35 | #include <linux/of.h> |
36 | #include <linux/irqdomain.h> | |
e9d35947 | 37 | |
b07682b6 | 38 | #include <linux/i2c/twl.h> |
e9d35947 | 39 | |
e9d35947 DB |
40 | /* |
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 | ||
e9d35947 DB |
51 | /* 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 | ||
72c7901e PU |
66 | struct gpio_twl4030_priv { |
67 | struct gpio_chip gpio_chip; | |
c111feab | 68 | struct mutex mutex; |
72c7901e PU |
69 | int irq_base; |
70 | ||
c111feab | 71 | /* Bitfields for state caching */ |
72c7901e | 72 | unsigned int usage_count; |
c111feab PU |
73 | unsigned int direction; |
74 | unsigned int out_state; | |
72c7901e | 75 | }; |
e9d35947 DB |
76 | |
77 | /*----------------------------------------------------------------------*/ | |
78 | ||
72c7901e PU |
79 | static 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 | ||
e9d35947 DB |
84 | /* |
85 | * To configure TWL4030 GPIO module registers | |
86 | */ | |
87 | static inline int gpio_twl4030_write(u8 address, u8 data) | |
88 | { | |
fc7b92fc | 89 | return twl_i2c_write_u8(TWL4030_MODULE_GPIO, data, address); |
e9d35947 DB |
90 | } |
91 | ||
92 | /*----------------------------------------------------------------------*/ | |
93 | ||
94 | /* | |
9859eb99 | 95 | * LED register offsets from TWL_MODULE_LED base |
e9d35947 DB |
96 | * PWMs A and B are dedicated to LEDs A and B, respectively. |
97 | */ | |
98 | ||
9859eb99 PU |
99 | #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 | |
e9d35947 DB |
104 | |
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 | ||
e9d35947 DB |
115 | #define PWMxON_LENGTH BIT(7) |
116 | ||
117 | /*----------------------------------------------------------------------*/ | |
118 | ||
119 | /* | |
120 | * To read a TWL4030 GPIO module register | |
121 | */ | |
122 | static inline int gpio_twl4030_read(u8 address) | |
123 | { | |
124 | u8 data; | |
125 | int ret = 0; | |
126 | ||
fc7b92fc | 127 | ret = twl_i2c_read_u8(TWL4030_MODULE_GPIO, &data, address); |
e9d35947 DB |
128 | return (ret < 0) ? ret : data; |
129 | } | |
130 | ||
131 | /*----------------------------------------------------------------------*/ | |
132 | ||
c111feab | 133 | static u8 cached_leden; |
e9d35947 DB |
134 | |
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 | */ | |
139 | static void twl4030_led_set_value(int led, int value) | |
140 | { | |
141 | u8 mask = LEDEN_LEDAON | LEDEN_LEDAPWM; | |
e9d35947 DB |
142 | |
143 | if (led) | |
144 | mask <<= 1; | |
145 | ||
e9d35947 DB |
146 | if (value) |
147 | cached_leden &= ~mask; | |
148 | else | |
149 | cached_leden |= mask; | |
fd0f885b AS |
150 | |
151 | WARN_ON_ONCE(twl_i2c_write_u8(TWL4030_MODULE_LED, cached_leden, | |
152 | TWL4030_LED_LEDEN_REG)); | |
e9d35947 DB |
153 | } |
154 | ||
155 | static 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 | ||
e9d35947 DB |
163 | 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 | } | |
e9d35947 DB |
172 | return ret; |
173 | } | |
174 | ||
175 | static 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 | ||
189 | static 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 | ||
e9d35947 DB |
196 | 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 | ||
e9d35947 DB |
204 | /*----------------------------------------------------------------------*/ |
205 | ||
206 | static int twl_request(struct gpio_chip *chip, unsigned offset) | |
207 | { | |
72c7901e | 208 | struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip); |
e9d35947 DB |
209 | int status = 0; |
210 | ||
c111feab | 211 | mutex_lock(&priv->mutex); |
e9d35947 DB |
212 | |
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; | |
9859eb99 | 217 | u8 reg = TWL4030_PWMAON_REG; |
e9d35947 DB |
218 | |
219 | offset -= TWL4030_GPIO_MAX; | |
220 | if (offset) { | |
221 | ledclr_mask <<= 1; | |
9859eb99 | 222 | reg = TWL4030_PWMBON_REG; |
e9d35947 DB |
223 | } |
224 | ||
225 | /* initialize PWM to always-drive */ | |
9859eb99 PU |
226 | /* Configure PWM OFF register first */ |
227 | status = twl_i2c_write_u8(TWL4030_MODULE_LED, 0x7f, reg + 1); | |
e9d35947 DB |
228 | if (status < 0) |
229 | goto done; | |
9859eb99 PU |
230 | |
231 | /* Followed by PWM ON register */ | |
232 | status = twl_i2c_write_u8(TWL4030_MODULE_LED, 0x7f, reg); | |
e9d35947 DB |
233 | if (status < 0) |
234 | goto done; | |
235 | ||
236 | /* init LED to not-driven (high) */ | |
9859eb99 PU |
237 | status = twl_i2c_read_u8(TWL4030_MODULE_LED, &cached_leden, |
238 | TWL4030_LED_LEDEN_REG); | |
e9d35947 DB |
239 | if (status < 0) |
240 | goto done; | |
241 | cached_leden &= ~ledclr_mask; | |
9859eb99 PU |
242 | status = twl_i2c_write_u8(TWL4030_MODULE_LED, cached_leden, |
243 | TWL4030_LED_LEDEN_REG); | |
e9d35947 DB |
244 | if (status < 0) |
245 | goto done; | |
246 | ||
247 | status = 0; | |
248 | goto done; | |
249 | } | |
250 | ||
251 | /* on first use, turn GPIO module "on" */ | |
72c7901e | 252 | if (!priv->usage_count) { |
e9d35947 DB |
253 | 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 | */ | |
e56aee18 | 259 | pdata = dev_get_platdata(chip->dev); |
b8589e2a BC |
260 | if (pdata) |
261 | value |= pdata->mmc_cd & 0x03; | |
e9d35947 DB |
262 | |
263 | status = gpio_twl4030_write(REG_GPIO_CTRL, value); | |
264 | } | |
265 | ||
72c7901e | 266 | done: |
e9d35947 | 267 | if (!status) |
72c7901e | 268 | priv->usage_count |= BIT(offset); |
e9d35947 | 269 | |
c111feab | 270 | mutex_unlock(&priv->mutex); |
e9d35947 DB |
271 | return status; |
272 | } | |
273 | ||
274 | static void twl_free(struct gpio_chip *chip, unsigned offset) | |
275 | { | |
72c7901e PU |
276 | struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip); |
277 | ||
c111feab | 278 | mutex_lock(&priv->mutex); |
e9d35947 DB |
279 | if (offset >= TWL4030_GPIO_MAX) { |
280 | twl4030_led_set_value(offset - TWL4030_GPIO_MAX, 1); | |
c111feab | 281 | goto out; |
e9d35947 DB |
282 | } |
283 | ||
72c7901e | 284 | priv->usage_count &= ~BIT(offset); |
e9d35947 DB |
285 | |
286 | /* on last use, switch off GPIO module */ | |
72c7901e | 287 | if (!priv->usage_count) |
e9d35947 DB |
288 | gpio_twl4030_write(REG_GPIO_CTRL, 0x0); |
289 | ||
c111feab PU |
290 | out: |
291 | mutex_unlock(&priv->mutex); | |
e9d35947 DB |
292 | } |
293 | ||
294 | static int twl_direction_in(struct gpio_chip *chip, unsigned offset) | |
295 | { | |
c111feab PU |
296 | 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 | |
f5837ec1 | 303 | ret = -EINVAL; /* LED outputs can't be set as input */ |
c111feab PU |
304 | |
305 | if (!ret) | |
306 | priv->direction &= ~BIT(offset); | |
307 | ||
308 | mutex_unlock(&priv->mutex); | |
309 | ||
310 | return ret; | |
e9d35947 DB |
311 | } |
312 | ||
313 | static int twl_get(struct gpio_chip *chip, unsigned offset) | |
314 | { | |
72c7901e | 315 | struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip); |
c111feab | 316 | int ret; |
e9d35947 DB |
317 | int status = 0; |
318 | ||
c111feab PU |
319 | mutex_lock(&priv->mutex); |
320 | if (!(priv->usage_count & BIT(offset))) { | |
321 | ret = -EPERM; | |
322 | goto out; | |
323 | } | |
72c7901e | 324 | |
c111feab PU |
325 | if (priv->direction & BIT(offset)) |
326 | status = priv->out_state & BIT(offset); | |
e9d35947 | 327 | else |
c111feab | 328 | status = twl4030_get_gpio_datain(offset); |
72c7901e | 329 | |
c111feab PU |
330 | ret = (status <= 0) ? 0 : 1; |
331 | out: | |
332 | mutex_unlock(&priv->mutex); | |
333 | return ret; | |
e9d35947 DB |
334 | } |
335 | ||
c111feab | 336 | static void twl_set(struct gpio_chip *chip, unsigned offset, int value) |
e9d35947 | 337 | { |
c111feab PU |
338 | struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip); |
339 | ||
340 | mutex_lock(&priv->mutex); | |
341 | if (offset < TWL4030_GPIO_MAX) | |
e9d35947 | 342 | twl4030_set_gpio_dataout(offset, value); |
c111feab | 343 | else |
e9d35947 | 344 | twl4030_led_set_value(offset - TWL4030_GPIO_MAX, value); |
c111feab PU |
345 | |
346 | if (value) | |
347 | priv->out_state |= BIT(offset); | |
348 | else | |
349 | priv->out_state &= ~BIT(offset); | |
350 | ||
351 | mutex_unlock(&priv->mutex); | |
e9d35947 DB |
352 | } |
353 | ||
c111feab | 354 | static int twl_direction_out(struct gpio_chip *chip, unsigned offset, int value) |
e9d35947 | 355 | { |
c111feab | 356 | struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip); |
f5837ec1 | 357 | int ret = 0; |
c111feab PU |
358 | |
359 | mutex_lock(&priv->mutex); | |
f5837ec1 | 360 | if (offset < TWL4030_GPIO_MAX) { |
0b2aa8be | 361 | ret = twl4030_set_gpio_direction(offset, 0); |
f5837ec1 RQ |
362 | 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 | */ | |
c111feab PU |
371 | |
372 | priv->direction |= BIT(offset); | |
373 | mutex_unlock(&priv->mutex); | |
374 | ||
375 | twl_set(chip, offset, value); | |
376 | ||
0b2aa8be | 377 | return ret; |
e9d35947 DB |
378 | } |
379 | ||
380 | static int twl_to_irq(struct gpio_chip *chip, unsigned offset) | |
381 | { | |
72c7901e PU |
382 | struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip); |
383 | ||
384 | return (priv->irq_base && (offset < TWL4030_GPIO_MAX)) | |
385 | ? (priv->irq_base + offset) | |
e9d35947 DB |
386 | : -EINVAL; |
387 | } | |
388 | ||
72c7901e | 389 | static struct gpio_chip template_chip = { |
e9d35947 DB |
390 | .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, | |
9fb1f39e | 399 | .can_sleep = true, |
e9d35947 DB |
400 | }; |
401 | ||
402 | /*----------------------------------------------------------------------*/ | |
403 | ||
3836309d | 404 | static int gpio_twl4030_pulls(u32 ups, u32 downs) |
e9d35947 | 405 | { |
14591d88 | 406 | u8 message[5]; |
e9d35947 DB |
407 | 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 | */ | |
14591d88 | 412 | for (gpio_bit = 1, i = 0; i < 5; i++) { |
e9d35947 DB |
413 | 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 | ||
fc7b92fc | 425 | return twl_i2c_write(TWL4030_MODULE_GPIO, message, |
e9d35947 DB |
426 | REG_GPIOPUPDCTR1, 5); |
427 | } | |
428 | ||
3836309d | 429 | static int gpio_twl4030_debounce(u32 debounce, u8 mmc_cd) |
cabb3fc4 | 430 | { |
14591d88 | 431 | u8 message[3]; |
cabb3fc4 DB |
432 | |
433 | /* 30 msec of debouncing is always used for MMC card detect, | |
434 | * and is optional for everything else. | |
435 | */ | |
14591d88 | 436 | message[0] = (debounce & 0xff) | (mmc_cd & 0x03); |
cabb3fc4 | 437 | debounce >>= 8; |
14591d88 | 438 | message[1] = (debounce & 0xff); |
cabb3fc4 | 439 | debounce >>= 8; |
14591d88 | 440 | message[2] = (debounce & 0x03); |
cabb3fc4 | 441 | |
fc7b92fc | 442 | return twl_i2c_write(TWL4030_MODULE_GPIO, message, |
cabb3fc4 DB |
443 | REG_GPIO_DEBEN1, 3); |
444 | } | |
445 | ||
e9d35947 DB |
446 | static int gpio_twl4030_remove(struct platform_device *pdev); |
447 | ||
fd3a5d5b TL |
448 | static struct twl4030_gpio_platform_data *of_gpio_twl4030(struct device *dev, |
449 | struct twl4030_gpio_platform_data *pdata) | |
f74ce8fb FV |
450 | { |
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 | ||
fd3a5d5b TL |
457 | if (pdata) |
458 | *omap_twl_info = *pdata; | |
459 | ||
f74ce8fb FV |
460 | 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 | ||
3836309d | 475 | static int gpio_twl4030_probe(struct platform_device *pdev) |
e9d35947 | 476 | { |
e56aee18 | 477 | struct twl4030_gpio_platform_data *pdata = dev_get_platdata(&pdev->dev); |
b8589e2a | 478 | struct device_node *node = pdev->dev.of_node; |
72c7901e | 479 | struct gpio_twl4030_priv *priv; |
2d9dd99b | 480 | int ret, irq_base; |
e9d35947 | 481 | |
72c7901e PU |
482 | priv = devm_kzalloc(&pdev->dev, sizeof(struct gpio_twl4030_priv), |
483 | GFP_KERNEL); | |
484 | if (!priv) | |
485 | return -ENOMEM; | |
486 | ||
e9d35947 | 487 | /* maybe setup IRQs */ |
2d9dd99b BC |
488 | if (is_module()) { |
489 | dev_err(&pdev->dev, "can't dispatch IRQs from modules\n"); | |
490 | goto no_irqs; | |
491 | } | |
492 | ||
493 | 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; | |
e9d35947 DB |
497 | } |
498 | ||
b8589e2a BC |
499 | irq_domain_add_legacy(node, TWL4030_GPIO_MAX, irq_base, 0, |
500 | &irq_domain_simple_ops, NULL); | |
501 | ||
2d9dd99b BC |
502 | ret = twl4030_sih_setup(&pdev->dev, TWL4030_MODULE_GPIO, irq_base); |
503 | if (ret < 0) | |
504 | return ret; | |
505 | ||
72c7901e | 506 | priv->irq_base = irq_base; |
2d9dd99b | 507 | |
e9d35947 | 508 | no_irqs: |
72c7901e PU |
509 | 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; | |
e9d35947 | 513 | |
c111feab PU |
514 | mutex_init(&priv->mutex); |
515 | ||
f74ce8fb | 516 | if (node) |
fd3a5d5b | 517 | pdata = of_gpio_twl4030(&pdev->dev, pdata); |
b8589e2a | 518 | |
f74ce8fb FV |
519 | if (pdata == NULL) { |
520 | dev_err(&pdev->dev, "Platform data is missing\n"); | |
521 | return -ENXIO; | |
b8589e2a | 522 | } |
e9d35947 | 523 | |
f74ce8fb FV |
524 | /* |
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) | |
72c7901e | 545 | priv->gpio_chip.ngpio += 2; |
f74ce8fb | 546 | |
72c7901e | 547 | ret = gpiochip_add(&priv->gpio_chip); |
e9d35947 | 548 | if (ret < 0) { |
2d9dd99b | 549 | dev_err(&pdev->dev, "could not register gpiochip, %d\n", ret); |
72c7901e | 550 | priv->gpio_chip.ngpio = 0; |
e9d35947 | 551 | gpio_twl4030_remove(pdev); |
a940d9a1 TL |
552 | goto out; |
553 | } | |
554 | ||
72c7901e | 555 | platform_set_drvdata(pdev, priv); |
a940d9a1 | 556 | |
fe5e23d3 | 557 | if (pdata->setup) { |
e9d35947 DB |
558 | int status; |
559 | ||
72c7901e PU |
560 | status = pdata->setup(&pdev->dev, priv->gpio_chip.base, |
561 | TWL4030_GPIO_MAX); | |
e9d35947 DB |
562 | if (status) |
563 | dev_dbg(&pdev->dev, "setup --> %d\n", status); | |
564 | } | |
565 | ||
a940d9a1 | 566 | out: |
e9d35947 DB |
567 | return ret; |
568 | } | |
569 | ||
206210ce | 570 | /* Cannot use as gpio_twl4030_probe() calls us */ |
46c529cf | 571 | static int gpio_twl4030_remove(struct platform_device *pdev) |
e9d35947 | 572 | { |
e56aee18 | 573 | struct twl4030_gpio_platform_data *pdata = dev_get_platdata(&pdev->dev); |
72c7901e | 574 | struct gpio_twl4030_priv *priv = platform_get_drvdata(pdev); |
e9d35947 DB |
575 | int status; |
576 | ||
b8589e2a | 577 | if (pdata && pdata->teardown) { |
72c7901e PU |
578 | status = pdata->teardown(&pdev->dev, priv->gpio_chip.base, |
579 | TWL4030_GPIO_MAX); | |
e9d35947 DB |
580 | if (status) { |
581 | dev_dbg(&pdev->dev, "teardown --> %d\n", status); | |
582 | return status; | |
583 | } | |
584 | } | |
585 | ||
9f5132ae | 586 | gpiochip_remove(&priv->gpio_chip); |
e9d35947 DB |
587 | |
588 | if (is_module()) | |
589 | return 0; | |
590 | ||
591 | /* REVISIT no support yet for deregistering all the IRQs */ | |
592 | WARN_ON(1); | |
593 | return -EIO; | |
594 | } | |
595 | ||
b8589e2a BC |
596 | static const struct of_device_id twl_gpio_match[] = { |
597 | { .compatible = "ti,twl4030-gpio", }, | |
598 | { }, | |
599 | }; | |
600 | MODULE_DEVICE_TABLE(of, twl_gpio_match); | |
601 | ||
e9d35947 DB |
602 | /* Note: this hardware lives inside an I2C-based multi-function device. */ |
603 | MODULE_ALIAS("platform:twl4030_gpio"); | |
604 | ||
605 | static struct platform_driver gpio_twl4030_driver = { | |
b8589e2a BC |
606 | .driver = { |
607 | .name = "twl4030_gpio", | |
e5560af4 | 608 | .of_match_table = twl_gpio_match, |
b8589e2a | 609 | }, |
e9d35947 | 610 | .probe = gpio_twl4030_probe, |
46c529cf | 611 | .remove = gpio_twl4030_remove, |
e9d35947 DB |
612 | }; |
613 | ||
614 | static int __init gpio_twl4030_init(void) | |
615 | { | |
616 | return platform_driver_register(&gpio_twl4030_driver); | |
617 | } | |
618 | subsys_initcall(gpio_twl4030_init); | |
619 | ||
620 | static void __exit gpio_twl4030_exit(void) | |
621 | { | |
622 | platform_driver_unregister(&gpio_twl4030_driver); | |
623 | } | |
624 | module_exit(gpio_twl4030_exit); | |
625 | ||
626 | MODULE_AUTHOR("Texas Instruments, Inc."); | |
627 | MODULE_DESCRIPTION("GPIO interface for TWL4030"); | |
628 | MODULE_LICENSE("GPL"); |