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 DB |
39 | |
40 | ||
41 | /* | |
42 | * The GPIO "subchip" supports 18 GPIOs which can be configured as | |
43 | * inputs or outputs, with pullups or pulldowns on each pin. Each | |
44 | * GPIO can trigger interrupts on either or both edges. | |
45 | * | |
46 | * GPIO interrupts can be fed to either of two IRQ lines; this is | |
47 | * intended to support multiple hosts. | |
48 | * | |
49 | * There are also two LED pins used sometimes as output-only GPIOs. | |
50 | */ | |
51 | ||
e9d35947 DB |
52 | /* genirq interfaces are not available to modules */ |
53 | #ifdef MODULE | |
54 | #define is_module() true | |
55 | #else | |
56 | #define is_module() false | |
57 | #endif | |
58 | ||
59 | /* GPIO_CTRL Fields */ | |
60 | #define MASK_GPIO_CTRL_GPIO0CD1 BIT(0) | |
61 | #define MASK_GPIO_CTRL_GPIO1CD2 BIT(1) | |
62 | #define MASK_GPIO_CTRL_GPIO_ON BIT(2) | |
63 | ||
64 | /* Mask for GPIO registers when aggregated into a 32-bit integer */ | |
65 | #define GPIO_32_MASK 0x0003ffff | |
66 | ||
67 | /* Data structures */ | |
68 | static DEFINE_MUTEX(gpio_lock); | |
69 | ||
72c7901e PU |
70 | struct gpio_twl4030_priv { |
71 | struct gpio_chip gpio_chip; | |
72 | int irq_base; | |
73 | ||
74 | unsigned int usage_count; | |
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 | ||
133 | static u8 cached_leden; /* protected by gpio_lock */ | |
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; | |
142 | int status; | |
143 | ||
144 | if (led) | |
145 | mask <<= 1; | |
146 | ||
147 | mutex_lock(&gpio_lock); | |
148 | if (value) | |
149 | cached_leden &= ~mask; | |
150 | else | |
151 | cached_leden |= mask; | |
fc7b92fc | 152 | status = twl_i2c_write_u8(TWL4030_MODULE_LED, cached_leden, |
9859eb99 | 153 | TWL4030_LED_LEDEN_REG); |
e9d35947 DB |
154 | mutex_unlock(&gpio_lock); |
155 | } | |
156 | ||
157 | static int twl4030_set_gpio_direction(int gpio, int is_input) | |
158 | { | |
159 | u8 d_bnk = gpio >> 3; | |
160 | u8 d_msk = BIT(gpio & 0x7); | |
161 | u8 reg = 0; | |
162 | u8 base = REG_GPIODATADIR1 + d_bnk; | |
163 | int ret = 0; | |
164 | ||
165 | mutex_lock(&gpio_lock); | |
166 | ret = gpio_twl4030_read(base); | |
167 | if (ret >= 0) { | |
168 | if (is_input) | |
169 | reg = ret & ~d_msk; | |
170 | else | |
171 | reg = ret | d_msk; | |
172 | ||
173 | ret = gpio_twl4030_write(base, reg); | |
174 | } | |
175 | mutex_unlock(&gpio_lock); | |
176 | return ret; | |
177 | } | |
178 | ||
179 | static int twl4030_set_gpio_dataout(int gpio, int enable) | |
180 | { | |
181 | u8 d_bnk = gpio >> 3; | |
182 | u8 d_msk = BIT(gpio & 0x7); | |
183 | u8 base = 0; | |
184 | ||
185 | if (enable) | |
186 | base = REG_SETGPIODATAOUT1 + d_bnk; | |
187 | else | |
188 | base = REG_CLEARGPIODATAOUT1 + d_bnk; | |
189 | ||
190 | return gpio_twl4030_write(base, d_msk); | |
191 | } | |
192 | ||
193 | static int twl4030_get_gpio_datain(int gpio) | |
194 | { | |
195 | u8 d_bnk = gpio >> 3; | |
196 | u8 d_off = gpio & 0x7; | |
197 | u8 base = 0; | |
198 | int ret = 0; | |
199 | ||
e9d35947 DB |
200 | base = REG_GPIODATAIN1 + d_bnk; |
201 | ret = gpio_twl4030_read(base); | |
202 | if (ret > 0) | |
203 | ret = (ret >> d_off) & 0x1; | |
204 | ||
205 | return ret; | |
206 | } | |
207 | ||
e9d35947 DB |
208 | /*----------------------------------------------------------------------*/ |
209 | ||
210 | static int twl_request(struct gpio_chip *chip, unsigned offset) | |
211 | { | |
72c7901e | 212 | struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip); |
e9d35947 DB |
213 | int status = 0; |
214 | ||
215 | mutex_lock(&gpio_lock); | |
216 | ||
217 | /* Support the two LED outputs as output-only GPIOs. */ | |
218 | if (offset >= TWL4030_GPIO_MAX) { | |
219 | u8 ledclr_mask = LEDEN_LEDAON | LEDEN_LEDAEXT | |
220 | | LEDEN_LEDAPWM | LEDEN_PWM_LENGTHA; | |
9859eb99 | 221 | u8 reg = TWL4030_PWMAON_REG; |
e9d35947 DB |
222 | |
223 | offset -= TWL4030_GPIO_MAX; | |
224 | if (offset) { | |
225 | ledclr_mask <<= 1; | |
9859eb99 | 226 | reg = TWL4030_PWMBON_REG; |
e9d35947 DB |
227 | } |
228 | ||
229 | /* initialize PWM to always-drive */ | |
9859eb99 PU |
230 | /* Configure PWM OFF register first */ |
231 | status = twl_i2c_write_u8(TWL4030_MODULE_LED, 0x7f, reg + 1); | |
e9d35947 DB |
232 | if (status < 0) |
233 | goto done; | |
9859eb99 PU |
234 | |
235 | /* Followed by PWM ON register */ | |
236 | status = twl_i2c_write_u8(TWL4030_MODULE_LED, 0x7f, reg); | |
e9d35947 DB |
237 | if (status < 0) |
238 | goto done; | |
239 | ||
240 | /* init LED to not-driven (high) */ | |
9859eb99 PU |
241 | status = twl_i2c_read_u8(TWL4030_MODULE_LED, &cached_leden, |
242 | TWL4030_LED_LEDEN_REG); | |
e9d35947 DB |
243 | if (status < 0) |
244 | goto done; | |
245 | cached_leden &= ~ledclr_mask; | |
9859eb99 PU |
246 | status = twl_i2c_write_u8(TWL4030_MODULE_LED, cached_leden, |
247 | TWL4030_LED_LEDEN_REG); | |
e9d35947 DB |
248 | if (status < 0) |
249 | goto done; | |
250 | ||
251 | status = 0; | |
252 | goto done; | |
253 | } | |
254 | ||
255 | /* on first use, turn GPIO module "on" */ | |
72c7901e | 256 | if (!priv->usage_count) { |
e9d35947 DB |
257 | struct twl4030_gpio_platform_data *pdata; |
258 | u8 value = MASK_GPIO_CTRL_GPIO_ON; | |
259 | ||
260 | /* optionally have the first two GPIOs switch vMMC1 | |
261 | * and vMMC2 power supplies based on card presence. | |
262 | */ | |
263 | pdata = chip->dev->platform_data; | |
b8589e2a BC |
264 | if (pdata) |
265 | value |= pdata->mmc_cd & 0x03; | |
e9d35947 DB |
266 | |
267 | status = gpio_twl4030_write(REG_GPIO_CTRL, value); | |
268 | } | |
269 | ||
72c7901e | 270 | done: |
e9d35947 | 271 | if (!status) |
72c7901e | 272 | priv->usage_count |= BIT(offset); |
e9d35947 | 273 | |
e9d35947 DB |
274 | mutex_unlock(&gpio_lock); |
275 | return status; | |
276 | } | |
277 | ||
278 | static void twl_free(struct gpio_chip *chip, unsigned offset) | |
279 | { | |
72c7901e PU |
280 | struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip); |
281 | ||
e9d35947 DB |
282 | if (offset >= TWL4030_GPIO_MAX) { |
283 | twl4030_led_set_value(offset - TWL4030_GPIO_MAX, 1); | |
284 | return; | |
285 | } | |
286 | ||
287 | mutex_lock(&gpio_lock); | |
288 | ||
72c7901e | 289 | priv->usage_count &= ~BIT(offset); |
e9d35947 DB |
290 | |
291 | /* on last use, switch off GPIO module */ | |
72c7901e | 292 | if (!priv->usage_count) |
e9d35947 DB |
293 | gpio_twl4030_write(REG_GPIO_CTRL, 0x0); |
294 | ||
295 | mutex_unlock(&gpio_lock); | |
296 | } | |
297 | ||
298 | static int twl_direction_in(struct gpio_chip *chip, unsigned offset) | |
299 | { | |
300 | return (offset < TWL4030_GPIO_MAX) | |
301 | ? twl4030_set_gpio_direction(offset, 1) | |
302 | : -EINVAL; | |
303 | } | |
304 | ||
305 | static int twl_get(struct gpio_chip *chip, unsigned offset) | |
306 | { | |
72c7901e | 307 | struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip); |
e9d35947 DB |
308 | int status = 0; |
309 | ||
72c7901e PU |
310 | if (!(priv->usage_count & BIT(offset))) |
311 | return -EPERM; | |
312 | ||
e9d35947 DB |
313 | if (offset < TWL4030_GPIO_MAX) |
314 | status = twl4030_get_gpio_datain(offset); | |
315 | else if (offset == TWL4030_GPIO_MAX) | |
316 | status = cached_leden & LEDEN_LEDAON; | |
317 | else | |
318 | status = cached_leden & LEDEN_LEDBON; | |
72c7901e | 319 | |
e9d35947 DB |
320 | return (status < 0) ? 0 : status; |
321 | } | |
322 | ||
323 | static int twl_direction_out(struct gpio_chip *chip, unsigned offset, int value) | |
324 | { | |
325 | if (offset < TWL4030_GPIO_MAX) { | |
326 | twl4030_set_gpio_dataout(offset, value); | |
327 | return twl4030_set_gpio_direction(offset, 0); | |
328 | } else { | |
329 | twl4030_led_set_value(offset - TWL4030_GPIO_MAX, value); | |
330 | return 0; | |
331 | } | |
332 | } | |
333 | ||
334 | static void twl_set(struct gpio_chip *chip, unsigned offset, int value) | |
335 | { | |
336 | if (offset < TWL4030_GPIO_MAX) | |
337 | twl4030_set_gpio_dataout(offset, value); | |
338 | else | |
339 | twl4030_led_set_value(offset - TWL4030_GPIO_MAX, value); | |
340 | } | |
341 | ||
342 | static int twl_to_irq(struct gpio_chip *chip, unsigned offset) | |
343 | { | |
72c7901e PU |
344 | struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip); |
345 | ||
346 | return (priv->irq_base && (offset < TWL4030_GPIO_MAX)) | |
347 | ? (priv->irq_base + offset) | |
e9d35947 DB |
348 | : -EINVAL; |
349 | } | |
350 | ||
72c7901e | 351 | static struct gpio_chip template_chip = { |
e9d35947 DB |
352 | .label = "twl4030", |
353 | .owner = THIS_MODULE, | |
354 | .request = twl_request, | |
355 | .free = twl_free, | |
356 | .direction_input = twl_direction_in, | |
357 | .get = twl_get, | |
358 | .direction_output = twl_direction_out, | |
359 | .set = twl_set, | |
360 | .to_irq = twl_to_irq, | |
361 | .can_sleep = 1, | |
362 | }; | |
363 | ||
364 | /*----------------------------------------------------------------------*/ | |
365 | ||
3836309d | 366 | static int gpio_twl4030_pulls(u32 ups, u32 downs) |
e9d35947 | 367 | { |
14591d88 | 368 | u8 message[5]; |
e9d35947 DB |
369 | unsigned i, gpio_bit; |
370 | ||
371 | /* For most pins, a pulldown was enabled by default. | |
372 | * We should have data that's specific to this board. | |
373 | */ | |
14591d88 | 374 | for (gpio_bit = 1, i = 0; i < 5; i++) { |
e9d35947 DB |
375 | u8 bit_mask; |
376 | unsigned j; | |
377 | ||
378 | for (bit_mask = 0, j = 0; j < 8; j += 2, gpio_bit <<= 1) { | |
379 | if (ups & gpio_bit) | |
380 | bit_mask |= 1 << (j + 1); | |
381 | else if (downs & gpio_bit) | |
382 | bit_mask |= 1 << (j + 0); | |
383 | } | |
384 | message[i] = bit_mask; | |
385 | } | |
386 | ||
fc7b92fc | 387 | return twl_i2c_write(TWL4030_MODULE_GPIO, message, |
e9d35947 DB |
388 | REG_GPIOPUPDCTR1, 5); |
389 | } | |
390 | ||
3836309d | 391 | static int gpio_twl4030_debounce(u32 debounce, u8 mmc_cd) |
cabb3fc4 | 392 | { |
14591d88 | 393 | u8 message[3]; |
cabb3fc4 DB |
394 | |
395 | /* 30 msec of debouncing is always used for MMC card detect, | |
396 | * and is optional for everything else. | |
397 | */ | |
14591d88 | 398 | message[0] = (debounce & 0xff) | (mmc_cd & 0x03); |
cabb3fc4 | 399 | debounce >>= 8; |
14591d88 | 400 | message[1] = (debounce & 0xff); |
cabb3fc4 | 401 | debounce >>= 8; |
14591d88 | 402 | message[2] = (debounce & 0x03); |
cabb3fc4 | 403 | |
fc7b92fc | 404 | return twl_i2c_write(TWL4030_MODULE_GPIO, message, |
cabb3fc4 DB |
405 | REG_GPIO_DEBEN1, 3); |
406 | } | |
407 | ||
e9d35947 DB |
408 | static int gpio_twl4030_remove(struct platform_device *pdev); |
409 | ||
f74ce8fb FV |
410 | static struct twl4030_gpio_platform_data *of_gpio_twl4030(struct device *dev) |
411 | { | |
412 | struct twl4030_gpio_platform_data *omap_twl_info; | |
413 | ||
414 | omap_twl_info = devm_kzalloc(dev, sizeof(*omap_twl_info), GFP_KERNEL); | |
415 | if (!omap_twl_info) | |
416 | return NULL; | |
417 | ||
f74ce8fb FV |
418 | omap_twl_info->use_leds = of_property_read_bool(dev->of_node, |
419 | "ti,use-leds"); | |
420 | ||
421 | of_property_read_u32(dev->of_node, "ti,debounce", | |
422 | &omap_twl_info->debounce); | |
423 | of_property_read_u32(dev->of_node, "ti,mmc-cd", | |
424 | (u32 *)&omap_twl_info->mmc_cd); | |
425 | of_property_read_u32(dev->of_node, "ti,pullups", | |
426 | &omap_twl_info->pullups); | |
427 | of_property_read_u32(dev->of_node, "ti,pulldowns", | |
428 | &omap_twl_info->pulldowns); | |
429 | ||
430 | return omap_twl_info; | |
431 | } | |
432 | ||
3836309d | 433 | static int gpio_twl4030_probe(struct platform_device *pdev) |
e9d35947 DB |
434 | { |
435 | struct twl4030_gpio_platform_data *pdata = pdev->dev.platform_data; | |
b8589e2a | 436 | struct device_node *node = pdev->dev.of_node; |
72c7901e | 437 | struct gpio_twl4030_priv *priv; |
2d9dd99b | 438 | int ret, irq_base; |
e9d35947 | 439 | |
72c7901e PU |
440 | priv = devm_kzalloc(&pdev->dev, sizeof(struct gpio_twl4030_priv), |
441 | GFP_KERNEL); | |
442 | if (!priv) | |
443 | return -ENOMEM; | |
444 | ||
e9d35947 | 445 | /* maybe setup IRQs */ |
2d9dd99b BC |
446 | if (is_module()) { |
447 | dev_err(&pdev->dev, "can't dispatch IRQs from modules\n"); | |
448 | goto no_irqs; | |
449 | } | |
450 | ||
451 | irq_base = irq_alloc_descs(-1, 0, TWL4030_GPIO_MAX, 0); | |
452 | if (irq_base < 0) { | |
453 | dev_err(&pdev->dev, "Failed to alloc irq_descs\n"); | |
454 | return irq_base; | |
e9d35947 DB |
455 | } |
456 | ||
b8589e2a BC |
457 | irq_domain_add_legacy(node, TWL4030_GPIO_MAX, irq_base, 0, |
458 | &irq_domain_simple_ops, NULL); | |
459 | ||
2d9dd99b BC |
460 | ret = twl4030_sih_setup(&pdev->dev, TWL4030_MODULE_GPIO, irq_base); |
461 | if (ret < 0) | |
462 | return ret; | |
463 | ||
72c7901e | 464 | priv->irq_base = irq_base; |
2d9dd99b | 465 | |
e9d35947 | 466 | no_irqs: |
72c7901e PU |
467 | priv->gpio_chip = template_chip; |
468 | priv->gpio_chip.base = -1; | |
469 | priv->gpio_chip.ngpio = TWL4030_GPIO_MAX; | |
470 | priv->gpio_chip.dev = &pdev->dev; | |
e9d35947 | 471 | |
f74ce8fb FV |
472 | if (node) |
473 | pdata = of_gpio_twl4030(&pdev->dev); | |
b8589e2a | 474 | |
f74ce8fb FV |
475 | if (pdata == NULL) { |
476 | dev_err(&pdev->dev, "Platform data is missing\n"); | |
477 | return -ENXIO; | |
b8589e2a | 478 | } |
e9d35947 | 479 | |
f74ce8fb FV |
480 | /* |
481 | * NOTE: boards may waste power if they don't set pullups | |
482 | * and pulldowns correctly ... default for non-ULPI pins is | |
483 | * pulldown, and some other pins may have external pullups | |
484 | * or pulldowns. Careful! | |
485 | */ | |
486 | ret = gpio_twl4030_pulls(pdata->pullups, pdata->pulldowns); | |
487 | if (ret) | |
488 | dev_dbg(&pdev->dev, "pullups %.05x %.05x --> %d\n", | |
489 | pdata->pullups, pdata->pulldowns, ret); | |
490 | ||
491 | ret = gpio_twl4030_debounce(pdata->debounce, pdata->mmc_cd); | |
492 | if (ret) | |
493 | dev_dbg(&pdev->dev, "debounce %.03x %.01x --> %d\n", | |
494 | pdata->debounce, pdata->mmc_cd, ret); | |
495 | ||
496 | /* | |
497 | * NOTE: we assume VIBRA_CTL.VIBRA_EN, in MODULE_AUDIO_VOICE, | |
498 | * is (still) clear if use_leds is set. | |
499 | */ | |
500 | if (pdata->use_leds) | |
72c7901e | 501 | priv->gpio_chip.ngpio += 2; |
f74ce8fb | 502 | |
72c7901e | 503 | ret = gpiochip_add(&priv->gpio_chip); |
e9d35947 | 504 | if (ret < 0) { |
2d9dd99b | 505 | dev_err(&pdev->dev, "could not register gpiochip, %d\n", ret); |
72c7901e | 506 | priv->gpio_chip.ngpio = 0; |
e9d35947 | 507 | gpio_twl4030_remove(pdev); |
a940d9a1 TL |
508 | goto out; |
509 | } | |
510 | ||
72c7901e | 511 | platform_set_drvdata(pdev, priv); |
a940d9a1 TL |
512 | |
513 | if (pdata && pdata->setup) { | |
e9d35947 DB |
514 | int status; |
515 | ||
72c7901e PU |
516 | status = pdata->setup(&pdev->dev, priv->gpio_chip.base, |
517 | TWL4030_GPIO_MAX); | |
e9d35947 DB |
518 | if (status) |
519 | dev_dbg(&pdev->dev, "setup --> %d\n", status); | |
520 | } | |
521 | ||
a940d9a1 | 522 | out: |
e9d35947 DB |
523 | return ret; |
524 | } | |
525 | ||
206210ce | 526 | /* Cannot use as gpio_twl4030_probe() calls us */ |
46c529cf | 527 | static int gpio_twl4030_remove(struct platform_device *pdev) |
e9d35947 DB |
528 | { |
529 | struct twl4030_gpio_platform_data *pdata = pdev->dev.platform_data; | |
72c7901e | 530 | struct gpio_twl4030_priv *priv = platform_get_drvdata(pdev); |
e9d35947 DB |
531 | int status; |
532 | ||
b8589e2a | 533 | if (pdata && pdata->teardown) { |
72c7901e PU |
534 | status = pdata->teardown(&pdev->dev, priv->gpio_chip.base, |
535 | TWL4030_GPIO_MAX); | |
e9d35947 DB |
536 | if (status) { |
537 | dev_dbg(&pdev->dev, "teardown --> %d\n", status); | |
538 | return status; | |
539 | } | |
540 | } | |
541 | ||
72c7901e | 542 | status = gpiochip_remove(&priv->gpio_chip); |
e9d35947 DB |
543 | if (status < 0) |
544 | return status; | |
545 | ||
546 | if (is_module()) | |
547 | return 0; | |
548 | ||
549 | /* REVISIT no support yet for deregistering all the IRQs */ | |
550 | WARN_ON(1); | |
551 | return -EIO; | |
552 | } | |
553 | ||
b8589e2a BC |
554 | static const struct of_device_id twl_gpio_match[] = { |
555 | { .compatible = "ti,twl4030-gpio", }, | |
556 | { }, | |
557 | }; | |
558 | MODULE_DEVICE_TABLE(of, twl_gpio_match); | |
559 | ||
e9d35947 DB |
560 | /* Note: this hardware lives inside an I2C-based multi-function device. */ |
561 | MODULE_ALIAS("platform:twl4030_gpio"); | |
562 | ||
563 | static struct platform_driver gpio_twl4030_driver = { | |
b8589e2a BC |
564 | .driver = { |
565 | .name = "twl4030_gpio", | |
566 | .owner = THIS_MODULE, | |
567 | .of_match_table = of_match_ptr(twl_gpio_match), | |
568 | }, | |
e9d35947 | 569 | .probe = gpio_twl4030_probe, |
46c529cf | 570 | .remove = gpio_twl4030_remove, |
e9d35947 DB |
571 | }; |
572 | ||
573 | static int __init gpio_twl4030_init(void) | |
574 | { | |
575 | return platform_driver_register(&gpio_twl4030_driver); | |
576 | } | |
577 | subsys_initcall(gpio_twl4030_init); | |
578 | ||
579 | static void __exit gpio_twl4030_exit(void) | |
580 | { | |
581 | platform_driver_unregister(&gpio_twl4030_driver); | |
582 | } | |
583 | module_exit(gpio_twl4030_exit); | |
584 | ||
585 | MODULE_AUTHOR("Texas Instruments, Inc."); | |
586 | MODULE_DESCRIPTION("GPIO interface for TWL4030"); | |
587 | MODULE_LICENSE("GPL"); |