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7d4d0a3e MB |
1 | /* |
2 | * wm831x-irq.c -- Interrupt controller support for Wolfson WM831x PMICs | |
3 | * | |
4 | * Copyright 2009 Wolfson Microelectronics PLC. | |
5 | * | |
6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include <linux/kernel.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/i2c.h> | |
5fb4d38b | 18 | #include <linux/irq.h> |
7d4d0a3e MB |
19 | #include <linux/mfd/core.h> |
20 | #include <linux/interrupt.h> | |
21 | ||
22 | #include <linux/mfd/wm831x/core.h> | |
23 | #include <linux/mfd/wm831x/pdata.h> | |
896060c7 | 24 | #include <linux/mfd/wm831x/gpio.h> |
7d4d0a3e MB |
25 | #include <linux/mfd/wm831x/irq.h> |
26 | ||
27 | #include <linux/delay.h> | |
28 | ||
7d4d0a3e MB |
29 | struct wm831x_irq_data { |
30 | int primary; | |
31 | int reg; | |
32 | int mask; | |
7d4d0a3e MB |
33 | }; |
34 | ||
35 | static struct wm831x_irq_data wm831x_irqs[] = { | |
36 | [WM831X_IRQ_TEMP_THW] = { | |
37 | .primary = WM831X_TEMP_INT, | |
38 | .reg = 1, | |
39 | .mask = WM831X_TEMP_THW_EINT, | |
40 | }, | |
41 | [WM831X_IRQ_GPIO_1] = { | |
42 | .primary = WM831X_GP_INT, | |
43 | .reg = 5, | |
44 | .mask = WM831X_GP1_EINT, | |
45 | }, | |
46 | [WM831X_IRQ_GPIO_2] = { | |
47 | .primary = WM831X_GP_INT, | |
48 | .reg = 5, | |
49 | .mask = WM831X_GP2_EINT, | |
50 | }, | |
51 | [WM831X_IRQ_GPIO_3] = { | |
52 | .primary = WM831X_GP_INT, | |
53 | .reg = 5, | |
54 | .mask = WM831X_GP3_EINT, | |
55 | }, | |
56 | [WM831X_IRQ_GPIO_4] = { | |
57 | .primary = WM831X_GP_INT, | |
58 | .reg = 5, | |
59 | .mask = WM831X_GP4_EINT, | |
60 | }, | |
61 | [WM831X_IRQ_GPIO_5] = { | |
62 | .primary = WM831X_GP_INT, | |
63 | .reg = 5, | |
64 | .mask = WM831X_GP5_EINT, | |
65 | }, | |
66 | [WM831X_IRQ_GPIO_6] = { | |
67 | .primary = WM831X_GP_INT, | |
68 | .reg = 5, | |
69 | .mask = WM831X_GP6_EINT, | |
70 | }, | |
71 | [WM831X_IRQ_GPIO_7] = { | |
72 | .primary = WM831X_GP_INT, | |
73 | .reg = 5, | |
74 | .mask = WM831X_GP7_EINT, | |
75 | }, | |
76 | [WM831X_IRQ_GPIO_8] = { | |
77 | .primary = WM831X_GP_INT, | |
78 | .reg = 5, | |
79 | .mask = WM831X_GP8_EINT, | |
80 | }, | |
81 | [WM831X_IRQ_GPIO_9] = { | |
82 | .primary = WM831X_GP_INT, | |
83 | .reg = 5, | |
84 | .mask = WM831X_GP9_EINT, | |
85 | }, | |
86 | [WM831X_IRQ_GPIO_10] = { | |
87 | .primary = WM831X_GP_INT, | |
88 | .reg = 5, | |
89 | .mask = WM831X_GP10_EINT, | |
90 | }, | |
91 | [WM831X_IRQ_GPIO_11] = { | |
92 | .primary = WM831X_GP_INT, | |
93 | .reg = 5, | |
94 | .mask = WM831X_GP11_EINT, | |
95 | }, | |
96 | [WM831X_IRQ_GPIO_12] = { | |
97 | .primary = WM831X_GP_INT, | |
98 | .reg = 5, | |
99 | .mask = WM831X_GP12_EINT, | |
100 | }, | |
101 | [WM831X_IRQ_GPIO_13] = { | |
102 | .primary = WM831X_GP_INT, | |
103 | .reg = 5, | |
104 | .mask = WM831X_GP13_EINT, | |
105 | }, | |
106 | [WM831X_IRQ_GPIO_14] = { | |
107 | .primary = WM831X_GP_INT, | |
108 | .reg = 5, | |
109 | .mask = WM831X_GP14_EINT, | |
110 | }, | |
111 | [WM831X_IRQ_GPIO_15] = { | |
112 | .primary = WM831X_GP_INT, | |
113 | .reg = 5, | |
114 | .mask = WM831X_GP15_EINT, | |
115 | }, | |
116 | [WM831X_IRQ_GPIO_16] = { | |
117 | .primary = WM831X_GP_INT, | |
118 | .reg = 5, | |
119 | .mask = WM831X_GP16_EINT, | |
120 | }, | |
121 | [WM831X_IRQ_ON] = { | |
122 | .primary = WM831X_ON_PIN_INT, | |
123 | .reg = 1, | |
124 | .mask = WM831X_ON_PIN_EINT, | |
125 | }, | |
126 | [WM831X_IRQ_PPM_SYSLO] = { | |
127 | .primary = WM831X_PPM_INT, | |
128 | .reg = 1, | |
129 | .mask = WM831X_PPM_SYSLO_EINT, | |
130 | }, | |
131 | [WM831X_IRQ_PPM_PWR_SRC] = { | |
132 | .primary = WM831X_PPM_INT, | |
133 | .reg = 1, | |
134 | .mask = WM831X_PPM_PWR_SRC_EINT, | |
135 | }, | |
136 | [WM831X_IRQ_PPM_USB_CURR] = { | |
137 | .primary = WM831X_PPM_INT, | |
138 | .reg = 1, | |
139 | .mask = WM831X_PPM_USB_CURR_EINT, | |
140 | }, | |
141 | [WM831X_IRQ_WDOG_TO] = { | |
142 | .primary = WM831X_WDOG_INT, | |
143 | .reg = 1, | |
144 | .mask = WM831X_WDOG_TO_EINT, | |
145 | }, | |
146 | [WM831X_IRQ_RTC_PER] = { | |
147 | .primary = WM831X_RTC_INT, | |
148 | .reg = 1, | |
149 | .mask = WM831X_RTC_PER_EINT, | |
150 | }, | |
151 | [WM831X_IRQ_RTC_ALM] = { | |
152 | .primary = WM831X_RTC_INT, | |
153 | .reg = 1, | |
154 | .mask = WM831X_RTC_ALM_EINT, | |
155 | }, | |
156 | [WM831X_IRQ_CHG_BATT_HOT] = { | |
157 | .primary = WM831X_CHG_INT, | |
158 | .reg = 2, | |
159 | .mask = WM831X_CHG_BATT_HOT_EINT, | |
160 | }, | |
161 | [WM831X_IRQ_CHG_BATT_COLD] = { | |
162 | .primary = WM831X_CHG_INT, | |
163 | .reg = 2, | |
164 | .mask = WM831X_CHG_BATT_COLD_EINT, | |
165 | }, | |
166 | [WM831X_IRQ_CHG_BATT_FAIL] = { | |
167 | .primary = WM831X_CHG_INT, | |
168 | .reg = 2, | |
169 | .mask = WM831X_CHG_BATT_FAIL_EINT, | |
170 | }, | |
171 | [WM831X_IRQ_CHG_OV] = { | |
172 | .primary = WM831X_CHG_INT, | |
173 | .reg = 2, | |
174 | .mask = WM831X_CHG_OV_EINT, | |
175 | }, | |
176 | [WM831X_IRQ_CHG_END] = { | |
177 | .primary = WM831X_CHG_INT, | |
178 | .reg = 2, | |
179 | .mask = WM831X_CHG_END_EINT, | |
180 | }, | |
181 | [WM831X_IRQ_CHG_TO] = { | |
182 | .primary = WM831X_CHG_INT, | |
183 | .reg = 2, | |
184 | .mask = WM831X_CHG_TO_EINT, | |
185 | }, | |
186 | [WM831X_IRQ_CHG_MODE] = { | |
187 | .primary = WM831X_CHG_INT, | |
188 | .reg = 2, | |
189 | .mask = WM831X_CHG_MODE_EINT, | |
190 | }, | |
191 | [WM831X_IRQ_CHG_START] = { | |
192 | .primary = WM831X_CHG_INT, | |
193 | .reg = 2, | |
194 | .mask = WM831X_CHG_START_EINT, | |
195 | }, | |
196 | [WM831X_IRQ_TCHDATA] = { | |
197 | .primary = WM831X_TCHDATA_INT, | |
198 | .reg = 1, | |
199 | .mask = WM831X_TCHDATA_EINT, | |
200 | }, | |
201 | [WM831X_IRQ_TCHPD] = { | |
202 | .primary = WM831X_TCHPD_INT, | |
203 | .reg = 1, | |
204 | .mask = WM831X_TCHPD_EINT, | |
205 | }, | |
206 | [WM831X_IRQ_AUXADC_DATA] = { | |
207 | .primary = WM831X_AUXADC_INT, | |
208 | .reg = 1, | |
209 | .mask = WM831X_AUXADC_DATA_EINT, | |
210 | }, | |
211 | [WM831X_IRQ_AUXADC_DCOMP1] = { | |
212 | .primary = WM831X_AUXADC_INT, | |
213 | .reg = 1, | |
214 | .mask = WM831X_AUXADC_DCOMP1_EINT, | |
215 | }, | |
216 | [WM831X_IRQ_AUXADC_DCOMP2] = { | |
217 | .primary = WM831X_AUXADC_INT, | |
218 | .reg = 1, | |
219 | .mask = WM831X_AUXADC_DCOMP2_EINT, | |
220 | }, | |
221 | [WM831X_IRQ_AUXADC_DCOMP3] = { | |
222 | .primary = WM831X_AUXADC_INT, | |
223 | .reg = 1, | |
224 | .mask = WM831X_AUXADC_DCOMP3_EINT, | |
225 | }, | |
226 | [WM831X_IRQ_AUXADC_DCOMP4] = { | |
227 | .primary = WM831X_AUXADC_INT, | |
228 | .reg = 1, | |
229 | .mask = WM831X_AUXADC_DCOMP4_EINT, | |
230 | }, | |
231 | [WM831X_IRQ_CS1] = { | |
232 | .primary = WM831X_CS_INT, | |
233 | .reg = 2, | |
234 | .mask = WM831X_CS1_EINT, | |
235 | }, | |
236 | [WM831X_IRQ_CS2] = { | |
237 | .primary = WM831X_CS_INT, | |
238 | .reg = 2, | |
239 | .mask = WM831X_CS2_EINT, | |
240 | }, | |
241 | [WM831X_IRQ_HC_DC1] = { | |
242 | .primary = WM831X_HC_INT, | |
243 | .reg = 4, | |
244 | .mask = WM831X_HC_DC1_EINT, | |
245 | }, | |
246 | [WM831X_IRQ_HC_DC2] = { | |
247 | .primary = WM831X_HC_INT, | |
248 | .reg = 4, | |
249 | .mask = WM831X_HC_DC2_EINT, | |
250 | }, | |
251 | [WM831X_IRQ_UV_LDO1] = { | |
252 | .primary = WM831X_UV_INT, | |
253 | .reg = 3, | |
254 | .mask = WM831X_UV_LDO1_EINT, | |
255 | }, | |
256 | [WM831X_IRQ_UV_LDO2] = { | |
257 | .primary = WM831X_UV_INT, | |
258 | .reg = 3, | |
259 | .mask = WM831X_UV_LDO2_EINT, | |
260 | }, | |
261 | [WM831X_IRQ_UV_LDO3] = { | |
262 | .primary = WM831X_UV_INT, | |
263 | .reg = 3, | |
264 | .mask = WM831X_UV_LDO3_EINT, | |
265 | }, | |
266 | [WM831X_IRQ_UV_LDO4] = { | |
267 | .primary = WM831X_UV_INT, | |
268 | .reg = 3, | |
269 | .mask = WM831X_UV_LDO4_EINT, | |
270 | }, | |
271 | [WM831X_IRQ_UV_LDO5] = { | |
272 | .primary = WM831X_UV_INT, | |
273 | .reg = 3, | |
274 | .mask = WM831X_UV_LDO5_EINT, | |
275 | }, | |
276 | [WM831X_IRQ_UV_LDO6] = { | |
277 | .primary = WM831X_UV_INT, | |
278 | .reg = 3, | |
279 | .mask = WM831X_UV_LDO6_EINT, | |
280 | }, | |
281 | [WM831X_IRQ_UV_LDO7] = { | |
282 | .primary = WM831X_UV_INT, | |
283 | .reg = 3, | |
284 | .mask = WM831X_UV_LDO7_EINT, | |
285 | }, | |
286 | [WM831X_IRQ_UV_LDO8] = { | |
287 | .primary = WM831X_UV_INT, | |
288 | .reg = 3, | |
289 | .mask = WM831X_UV_LDO8_EINT, | |
290 | }, | |
291 | [WM831X_IRQ_UV_LDO9] = { | |
292 | .primary = WM831X_UV_INT, | |
293 | .reg = 3, | |
294 | .mask = WM831X_UV_LDO9_EINT, | |
295 | }, | |
296 | [WM831X_IRQ_UV_LDO10] = { | |
297 | .primary = WM831X_UV_INT, | |
298 | .reg = 3, | |
299 | .mask = WM831X_UV_LDO10_EINT, | |
300 | }, | |
301 | [WM831X_IRQ_UV_DC1] = { | |
302 | .primary = WM831X_UV_INT, | |
303 | .reg = 4, | |
304 | .mask = WM831X_UV_DC1_EINT, | |
305 | }, | |
306 | [WM831X_IRQ_UV_DC2] = { | |
307 | .primary = WM831X_UV_INT, | |
308 | .reg = 4, | |
309 | .mask = WM831X_UV_DC2_EINT, | |
310 | }, | |
311 | [WM831X_IRQ_UV_DC3] = { | |
312 | .primary = WM831X_UV_INT, | |
313 | .reg = 4, | |
314 | .mask = WM831X_UV_DC3_EINT, | |
315 | }, | |
316 | [WM831X_IRQ_UV_DC4] = { | |
317 | .primary = WM831X_UV_INT, | |
318 | .reg = 4, | |
319 | .mask = WM831X_UV_DC4_EINT, | |
320 | }, | |
321 | }; | |
322 | ||
323 | static inline int irq_data_to_status_reg(struct wm831x_irq_data *irq_data) | |
324 | { | |
325 | return WM831X_INTERRUPT_STATUS_1 - 1 + irq_data->reg; | |
326 | } | |
327 | ||
328 | static inline int irq_data_to_mask_reg(struct wm831x_irq_data *irq_data) | |
329 | { | |
330 | return WM831X_INTERRUPT_STATUS_1_MASK - 1 + irq_data->reg; | |
331 | } | |
332 | ||
5fb4d38b MB |
333 | static inline struct wm831x_irq_data *irq_to_wm831x_irq(struct wm831x *wm831x, |
334 | int irq) | |
7d4d0a3e | 335 | { |
5fb4d38b | 336 | return &wm831x_irqs[irq - wm831x->irq_base]; |
7d4d0a3e MB |
337 | } |
338 | ||
ba81cd39 | 339 | static void wm831x_irq_lock(struct irq_data *data) |
7d4d0a3e | 340 | { |
25a947f8 | 341 | struct wm831x *wm831x = irq_data_get_irq_chip_data(data); |
7d4d0a3e | 342 | |
7d4d0a3e | 343 | mutex_lock(&wm831x->irq_lock); |
7d4d0a3e | 344 | } |
7d4d0a3e | 345 | |
ba81cd39 | 346 | static void wm831x_irq_sync_unlock(struct irq_data *data) |
7d4d0a3e | 347 | { |
25a947f8 | 348 | struct wm831x *wm831x = irq_data_get_irq_chip_data(data); |
5fb4d38b MB |
349 | int i; |
350 | ||
351 | for (i = 0; i < ARRAY_SIZE(wm831x->irq_masks_cur); i++) { | |
352 | /* If there's been a change in the mask write it back | |
353 | * to the hardware. */ | |
354 | if (wm831x->irq_masks_cur[i] != wm831x->irq_masks_cache[i]) { | |
f624effb MB |
355 | dev_dbg(wm831x->dev, "IRQ mask sync: %x = %x\n", |
356 | WM831X_INTERRUPT_STATUS_1_MASK + i, | |
357 | wm831x->irq_masks_cur[i]); | |
358 | ||
5fb4d38b MB |
359 | wm831x->irq_masks_cache[i] = wm831x->irq_masks_cur[i]; |
360 | wm831x_reg_write(wm831x, | |
361 | WM831X_INTERRUPT_STATUS_1_MASK + i, | |
362 | wm831x->irq_masks_cur[i]); | |
363 | } | |
7d4d0a3e MB |
364 | } |
365 | ||
7d4d0a3e | 366 | mutex_unlock(&wm831x->irq_lock); |
7d4d0a3e | 367 | } |
7d4d0a3e | 368 | |
f624effb | 369 | static void wm831x_irq_enable(struct irq_data *data) |
7d4d0a3e | 370 | { |
25a947f8 | 371 | struct wm831x *wm831x = irq_data_get_irq_chip_data(data); |
ba81cd39 MB |
372 | struct wm831x_irq_data *irq_data = irq_to_wm831x_irq(wm831x, |
373 | data->irq); | |
7d4d0a3e | 374 | |
5fb4d38b | 375 | wm831x->irq_masks_cur[irq_data->reg - 1] &= ~irq_data->mask; |
7d4d0a3e | 376 | } |
7d4d0a3e | 377 | |
f624effb | 378 | static void wm831x_irq_disable(struct irq_data *data) |
7d4d0a3e | 379 | { |
25a947f8 | 380 | struct wm831x *wm831x = irq_data_get_irq_chip_data(data); |
ba81cd39 MB |
381 | struct wm831x_irq_data *irq_data = irq_to_wm831x_irq(wm831x, |
382 | data->irq); | |
5fb4d38b MB |
383 | |
384 | wm831x->irq_masks_cur[irq_data->reg - 1] |= irq_data->mask; | |
7d4d0a3e MB |
385 | } |
386 | ||
ba81cd39 | 387 | static int wm831x_irq_set_type(struct irq_data *data, unsigned int type) |
896060c7 | 388 | { |
25a947f8 | 389 | struct wm831x *wm831x = irq_data_get_irq_chip_data(data); |
ba81cd39 | 390 | int val, irq; |
896060c7 | 391 | |
ba81cd39 | 392 | irq = data->irq - wm831x->irq_base; |
896060c7 | 393 | |
c9d66d35 MB |
394 | if (irq < WM831X_IRQ_GPIO_1 || irq > WM831X_IRQ_GPIO_11) { |
395 | /* Ignore internal-only IRQs */ | |
396 | if (irq >= 0 && irq < WM831X_NUM_IRQS) | |
397 | return 0; | |
398 | else | |
399 | return -EINVAL; | |
400 | } | |
896060c7 MB |
401 | |
402 | switch (type) { | |
403 | case IRQ_TYPE_EDGE_BOTH: | |
404 | val = WM831X_GPN_INT_MODE; | |
405 | break; | |
406 | case IRQ_TYPE_EDGE_RISING: | |
407 | val = WM831X_GPN_POL; | |
408 | break; | |
409 | case IRQ_TYPE_EDGE_FALLING: | |
410 | val = 0; | |
411 | break; | |
412 | default: | |
413 | return -EINVAL; | |
414 | } | |
415 | ||
416 | return wm831x_set_bits(wm831x, WM831X_GPIO1_CONTROL + irq, | |
417 | WM831X_GPN_INT_MODE | WM831X_GPN_POL, val); | |
418 | } | |
419 | ||
5fb4d38b | 420 | static struct irq_chip wm831x_irq_chip = { |
ba81cd39 MB |
421 | .name = "wm831x", |
422 | .irq_bus_lock = wm831x_irq_lock, | |
423 | .irq_bus_sync_unlock = wm831x_irq_sync_unlock, | |
f624effb MB |
424 | .irq_disable = wm831x_irq_disable, |
425 | .irq_enable = wm831x_irq_enable, | |
ba81cd39 | 426 | .irq_set_type = wm831x_irq_set_type, |
5fb4d38b MB |
427 | }; |
428 | ||
429 | /* The processing of the primary interrupt occurs in a thread so that | |
430 | * we can interact with the device over I2C or SPI. */ | |
431 | static irqreturn_t wm831x_irq_thread(int irq, void *data) | |
7d4d0a3e | 432 | { |
5fb4d38b | 433 | struct wm831x *wm831x = data; |
7d4d0a3e MB |
434 | unsigned int i; |
435 | int primary; | |
5fb4d38b MB |
436 | int status_regs[WM831X_NUM_IRQ_REGS] = { 0 }; |
437 | int read[WM831X_NUM_IRQ_REGS] = { 0 }; | |
7d4d0a3e MB |
438 | int *status; |
439 | ||
440 | primary = wm831x_reg_read(wm831x, WM831X_SYSTEM_INTERRUPTS); | |
441 | if (primary < 0) { | |
442 | dev_err(wm831x->dev, "Failed to read system interrupt: %d\n", | |
443 | primary); | |
444 | goto out; | |
445 | } | |
446 | ||
8546bd4a MB |
447 | /* The touch interrupts are visible in the primary register as |
448 | * an optimisation; open code this to avoid complicating the | |
449 | * main handling loop and so we can also skip iterating the | |
450 | * descriptors. | |
451 | */ | |
452 | if (primary & WM831X_TCHPD_INT) | |
453 | handle_nested_irq(wm831x->irq_base + WM831X_IRQ_TCHPD); | |
454 | if (primary & WM831X_TCHDATA_INT) | |
455 | handle_nested_irq(wm831x->irq_base + WM831X_IRQ_TCHDATA); | |
456 | if (primary & (WM831X_TCHDATA_EINT | WM831X_TCHPD_EINT)) | |
457 | goto out; | |
458 | ||
7d4d0a3e MB |
459 | for (i = 0; i < ARRAY_SIZE(wm831x_irqs); i++) { |
460 | int offset = wm831x_irqs[i].reg - 1; | |
461 | ||
462 | if (!(primary & wm831x_irqs[i].primary)) | |
463 | continue; | |
464 | ||
465 | status = &status_regs[offset]; | |
466 | ||
467 | /* Hopefully there should only be one register to read | |
468 | * each time otherwise we ought to do a block read. */ | |
469 | if (!read[offset]) { | |
470 | *status = wm831x_reg_read(wm831x, | |
471 | irq_data_to_status_reg(&wm831x_irqs[i])); | |
472 | if (*status < 0) { | |
473 | dev_err(wm831x->dev, | |
474 | "Failed to read IRQ status: %d\n", | |
475 | *status); | |
5fb4d38b | 476 | goto out; |
7d4d0a3e MB |
477 | } |
478 | ||
7d4d0a3e MB |
479 | read[offset] = 1; |
480 | } | |
481 | ||
5fb4d38b MB |
482 | /* Report it if it isn't masked, or forget the status. */ |
483 | if ((*status & ~wm831x->irq_masks_cur[offset]) | |
484 | & wm831x_irqs[i].mask) | |
485 | handle_nested_irq(wm831x->irq_base + i); | |
486 | else | |
487 | *status &= ~wm831x_irqs[i].mask; | |
7d4d0a3e MB |
488 | } |
489 | ||
7d4d0a3e | 490 | out: |
df508450 MB |
491 | /* Touchscreen interrupts are handled specially in the driver */ |
492 | status_regs[0] &= ~(WM831X_TCHDATA_EINT | WM831X_TCHPD_EINT); | |
493 | ||
5fb4d38b MB |
494 | for (i = 0; i < ARRAY_SIZE(status_regs); i++) { |
495 | if (status_regs[i]) | |
496 | wm831x_reg_write(wm831x, WM831X_INTERRUPT_STATUS_1 + i, | |
497 | status_regs[i]); | |
498 | } | |
7d4d0a3e MB |
499 | |
500 | return IRQ_HANDLED; | |
501 | } | |
502 | ||
503 | int wm831x_irq_init(struct wm831x *wm831x, int irq) | |
504 | { | |
5fb4d38b MB |
505 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; |
506 | int i, cur_irq, ret; | |
7d4d0a3e | 507 | |
14f572fa MB |
508 | mutex_init(&wm831x->irq_lock); |
509 | ||
0d7e0e39 MB |
510 | /* Mask the individual interrupt sources */ |
511 | for (i = 0; i < ARRAY_SIZE(wm831x->irq_masks_cur); i++) { | |
512 | wm831x->irq_masks_cur[i] = 0xffff; | |
513 | wm831x->irq_masks_cache[i] = 0xffff; | |
514 | wm831x_reg_write(wm831x, WM831X_INTERRUPT_STATUS_1_MASK + i, | |
515 | 0xffff); | |
516 | } | |
517 | ||
7d4d0a3e MB |
518 | if (!irq) { |
519 | dev_warn(wm831x->dev, | |
520 | "No interrupt specified - functionality limited\n"); | |
521 | return 0; | |
522 | } | |
523 | ||
5fb4d38b MB |
524 | if (!pdata || !pdata->irq_base) { |
525 | dev_err(wm831x->dev, | |
526 | "No interrupt base specified, no interrupts\n"); | |
527 | return 0; | |
7d4d0a3e MB |
528 | } |
529 | ||
b103e0b3 MB |
530 | if (pdata->irq_cmos) |
531 | i = 0; | |
532 | else | |
533 | i = WM831X_IRQ_OD; | |
534 | ||
535 | wm831x_set_bits(wm831x, WM831X_IRQ_CONFIG, | |
536 | WM831X_IRQ_OD, i); | |
537 | ||
180e4f5f MB |
538 | /* Try to flag /IRQ as a wake source; there are a number of |
539 | * unconditional wake sources in the PMIC so this isn't | |
540 | * conditional but we don't actually care *too* much if it | |
541 | * fails. | |
542 | */ | |
543 | ret = enable_irq_wake(irq); | |
544 | if (ret != 0) { | |
545 | dev_warn(wm831x->dev, "Can't enable IRQ as wake source: %d\n", | |
546 | ret); | |
547 | } | |
548 | ||
7d4d0a3e | 549 | wm831x->irq = irq; |
5fb4d38b | 550 | wm831x->irq_base = pdata->irq_base; |
7d4d0a3e | 551 | |
5fb4d38b MB |
552 | /* Register them with genirq */ |
553 | for (cur_irq = wm831x->irq_base; | |
554 | cur_irq < ARRAY_SIZE(wm831x_irqs) + wm831x->irq_base; | |
555 | cur_irq++) { | |
556 | set_irq_chip_data(cur_irq, wm831x); | |
557 | set_irq_chip_and_handler(cur_irq, &wm831x_irq_chip, | |
558 | handle_edge_irq); | |
559 | set_irq_nested_thread(cur_irq, 1); | |
560 | ||
561 | /* ARM needs us to explicitly flag the IRQ as valid | |
562 | * and will set them noprobe when we do so. */ | |
563 | #ifdef CONFIG_ARM | |
564 | set_irq_flags(cur_irq, IRQF_VALID); | |
565 | #else | |
566 | set_irq_noprobe(cur_irq); | |
567 | #endif | |
568 | } | |
7d4d0a3e | 569 | |
5fb4d38b MB |
570 | ret = request_threaded_irq(irq, NULL, wm831x_irq_thread, |
571 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
572 | "wm831x", wm831x); | |
7d4d0a3e MB |
573 | if (ret != 0) { |
574 | dev_err(wm831x->dev, "Failed to request IRQ %d: %d\n", | |
575 | irq, ret); | |
576 | return ret; | |
577 | } | |
578 | ||
5fb4d38b MB |
579 | /* Enable top level interrupts, we mask at secondary level */ |
580 | wm831x_reg_write(wm831x, WM831X_SYSTEM_INTERRUPTS_MASK, 0); | |
581 | ||
7d4d0a3e MB |
582 | return 0; |
583 | } | |
584 | ||
585 | void wm831x_irq_exit(struct wm831x *wm831x) | |
586 | { | |
587 | if (wm831x->irq) | |
588 | free_irq(wm831x->irq, wm831x); | |
589 | } |