2 * Arizona interrupt support
4 * Copyright 2012 Wolfson Microelectronics plc
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include <linux/delay.h>
14 #include <linux/gpio.h>
15 #include <linux/interrupt.h>
16 #include <linux/irq.h>
17 #include <linux/irqdomain.h>
18 #include <linux/module.h>
19 #include <linux/pm_runtime.h>
20 #include <linux/regmap.h>
21 #include <linux/regulator/consumer.h>
22 #include <linux/slab.h>
24 #include <linux/mfd/arizona/core.h>
25 #include <linux/mfd/arizona/registers.h>
29 #define ARIZONA_AOD_IRQ_INDEX 0
30 #define ARIZONA_MAIN_IRQ_INDEX 1
32 static int arizona_map_irq(struct arizona *arizona, int irq)
36 if (arizona->aod_irq_chip) {
37 ret = regmap_irq_get_virq(arizona->aod_irq_chip, irq);
42 return regmap_irq_get_virq(arizona->irq_chip, irq);
45 int arizona_request_irq(struct arizona *arizona, int irq, char *name,
46 irq_handler_t handler, void *data)
48 irq = arizona_map_irq(arizona, irq);
52 return request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT,
55 EXPORT_SYMBOL_GPL(arizona_request_irq);
57 void arizona_free_irq(struct arizona *arizona, int irq, void *data)
59 irq = arizona_map_irq(arizona, irq);
65 EXPORT_SYMBOL_GPL(arizona_free_irq);
67 int arizona_set_irq_wake(struct arizona *arizona, int irq, int on)
69 irq = arizona_map_irq(arizona, irq);
73 return irq_set_irq_wake(irq, on);
75 EXPORT_SYMBOL_GPL(arizona_set_irq_wake);
77 static irqreturn_t arizona_boot_done(int irq, void *data)
79 struct arizona *arizona = data;
81 dev_dbg(arizona->dev, "Boot done\n");
86 static irqreturn_t arizona_ctrlif_err(int irq, void *data)
88 struct arizona *arizona = data;
91 * For pretty much all potential sources a register cache sync
92 * won't help, we've just got a software bug somewhere.
94 dev_err(arizona->dev, "Control interface error\n");
99 static irqreturn_t arizona_irq_thread(int irq, void *data)
101 struct arizona *arizona = data;
106 ret = pm_runtime_get_sync(arizona->dev);
108 dev_err(arizona->dev, "Failed to resume device: %d\n", ret);
115 if (arizona->aod_irq_chip) {
117 * Check the AOD status register to determine whether
118 * the nested IRQ handler should be called.
120 ret = regmap_read(arizona->regmap,
121 ARIZONA_AOD_IRQ1, &val);
123 dev_warn(arizona->dev,
124 "Failed to read AOD IRQ1 %d\n", ret);
127 irq_find_mapping(arizona->virq, 0));
131 * Check if one of the main interrupts is asserted and only
132 * check that domain if it is.
134 ret = regmap_read(arizona->regmap, ARIZONA_IRQ_PIN_STATUS,
136 if (ret == 0 && val & ARIZONA_IRQ1_STS) {
137 handle_nested_irq(irq_find_mapping(arizona->virq, 1));
138 } else if (ret != 0) {
139 dev_err(arizona->dev,
140 "Failed to read main IRQ status: %d\n", ret);
144 * Poll the IRQ pin status to see if we're really done
145 * if the interrupt controller can't do it for us.
147 if (!arizona->pdata.irq_gpio) {
149 } else if (arizona->pdata.irq_flags & IRQF_TRIGGER_RISING &&
150 gpio_get_value_cansleep(arizona->pdata.irq_gpio)) {
152 } else if (arizona->pdata.irq_flags & IRQF_TRIGGER_FALLING &&
153 !gpio_get_value_cansleep(arizona->pdata.irq_gpio)) {
158 pm_runtime_mark_last_busy(arizona->dev);
159 pm_runtime_put_autosuspend(arizona->dev);
164 static void arizona_irq_enable(struct irq_data *data)
168 static void arizona_irq_disable(struct irq_data *data)
172 static int arizona_irq_set_wake(struct irq_data *data, unsigned int on)
174 struct arizona *arizona = irq_data_get_irq_chip_data(data);
176 return irq_set_irq_wake(arizona->irq, on);
179 static struct irq_chip arizona_irq_chip = {
181 .irq_disable = arizona_irq_disable,
182 .irq_enable = arizona_irq_enable,
183 .irq_set_wake = arizona_irq_set_wake,
186 static struct lock_class_key arizona_irq_lock_class;
188 static int arizona_irq_map(struct irq_domain *h, unsigned int virq,
191 struct arizona *data = h->host_data;
193 irq_set_chip_data(virq, data);
194 irq_set_lockdep_class(virq, &arizona_irq_lock_class);
195 irq_set_chip_and_handler(virq, &arizona_irq_chip, handle_simple_irq);
196 irq_set_nested_thread(virq, 1);
197 irq_set_noprobe(virq);
202 static const struct irq_domain_ops arizona_domain_ops = {
203 .map = arizona_irq_map,
204 .xlate = irq_domain_xlate_twocell,
207 int arizona_irq_init(struct arizona *arizona)
209 int flags = IRQF_ONESHOT;
211 const struct regmap_irq_chip *aod, *irq;
212 struct irq_data *irq_data;
215 arizona->ctrlif_error = true;
217 switch (arizona->type) {
218 #ifdef CONFIG_MFD_WM5102
223 arizona->ctrlif_error = false;
226 #ifdef CONFIG_MFD_WM5110
231 switch (arizona->rev) {
236 irq = &wm5110_revd_irq;
240 arizona->ctrlif_error = false;
243 #ifdef CONFIG_MFD_CS47L24
249 arizona->ctrlif_error = false;
252 #ifdef CONFIG_MFD_WM8997
257 arizona->ctrlif_error = false;
260 #ifdef CONFIG_MFD_WM8998
266 arizona->ctrlif_error = false;
270 BUG_ON("Unknown Arizona class device" == NULL);
274 /* Disable all wake sources by default */
275 regmap_write(arizona->regmap, ARIZONA_WAKE_CONTROL, 0);
277 /* Read the flags from the interrupt controller if not specified */
278 if (!arizona->pdata.irq_flags) {
279 irq_data = irq_get_irq_data(arizona->irq);
281 dev_err(arizona->dev, "Invalid IRQ: %d\n",
286 arizona->pdata.irq_flags = irqd_get_trigger_type(irq_data);
287 switch (arizona->pdata.irq_flags) {
288 case IRQF_TRIGGER_LOW:
289 case IRQF_TRIGGER_HIGH:
290 case IRQF_TRIGGER_RISING:
291 case IRQF_TRIGGER_FALLING:
297 arizona->pdata.irq_flags = IRQF_TRIGGER_LOW;
302 if (arizona->pdata.irq_flags & (IRQF_TRIGGER_HIGH |
303 IRQF_TRIGGER_RISING)) {
304 ret = regmap_update_bits(arizona->regmap, ARIZONA_IRQ_CTRL_1,
307 dev_err(arizona->dev, "Couldn't set IRQ polarity: %d\n",
313 flags |= arizona->pdata.irq_flags;
315 /* Allocate a virtual IRQ domain to distribute to the regmap domains */
316 arizona->virq = irq_domain_add_linear(NULL, 2, &arizona_domain_ops,
318 if (!arizona->virq) {
319 dev_err(arizona->dev, "Failed to add core IRQ domain\n");
325 virq = irq_create_mapping(arizona->virq, ARIZONA_AOD_IRQ_INDEX);
327 dev_err(arizona->dev, "Failed to map AOD IRQs\n");
332 ret = regmap_add_irq_chip(arizona->regmap, virq, IRQF_ONESHOT,
333 0, aod, &arizona->aod_irq_chip);
335 dev_err(arizona->dev,
336 "Failed to add AOD IRQs: %d\n", ret);
341 virq = irq_create_mapping(arizona->virq, ARIZONA_MAIN_IRQ_INDEX);
343 dev_err(arizona->dev, "Failed to map main IRQs\n");
348 ret = regmap_add_irq_chip(arizona->regmap, virq, IRQF_ONESHOT,
349 0, irq, &arizona->irq_chip);
351 dev_err(arizona->dev, "Failed to add main IRQs: %d\n", ret);
352 goto err_map_main_irq;
355 /* Used to emulate edge trigger and to work around broken pinmux */
356 if (arizona->pdata.irq_gpio) {
357 if (gpio_to_irq(arizona->pdata.irq_gpio) != arizona->irq) {
358 dev_warn(arizona->dev, "IRQ %d is not GPIO %d (%d)\n",
359 arizona->irq, arizona->pdata.irq_gpio,
360 gpio_to_irq(arizona->pdata.irq_gpio));
361 arizona->irq = gpio_to_irq(arizona->pdata.irq_gpio);
364 ret = devm_gpio_request_one(arizona->dev,
365 arizona->pdata.irq_gpio,
366 GPIOF_IN, "arizona IRQ");
368 dev_err(arizona->dev,
369 "Failed to request IRQ GPIO %d:: %d\n",
370 arizona->pdata.irq_gpio, ret);
371 arizona->pdata.irq_gpio = 0;
375 ret = request_threaded_irq(arizona->irq, NULL, arizona_irq_thread,
376 flags, "arizona", arizona);
379 dev_err(arizona->dev, "Failed to request primary IRQ %d: %d\n",
384 /* Make sure the boot done IRQ is unmasked for resumes */
385 ret = arizona_request_irq(arizona, ARIZONA_IRQ_BOOT_DONE, "Boot done",
386 arizona_boot_done, arizona);
388 dev_err(arizona->dev, "Failed to request boot done %d: %d\n",
393 /* Handle control interface errors in the core */
394 if (arizona->ctrlif_error) {
395 ret = arizona_request_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR,
396 "Control interface error",
397 arizona_ctrlif_err, arizona);
399 dev_err(arizona->dev,
400 "Failed to request CTRLIF_ERR %d: %d\n",
409 arizona_free_irq(arizona, ARIZONA_IRQ_BOOT_DONE, arizona);
411 free_irq(arizona->irq, arizona);
413 regmap_del_irq_chip(irq_find_mapping(arizona->virq,
414 ARIZONA_MAIN_IRQ_INDEX),
417 irq_dispose_mapping(irq_find_mapping(arizona->virq,
418 ARIZONA_MAIN_IRQ_INDEX));
420 regmap_del_irq_chip(irq_find_mapping(arizona->virq,
421 ARIZONA_AOD_IRQ_INDEX),
422 arizona->aod_irq_chip);
424 irq_dispose_mapping(irq_find_mapping(arizona->virq,
425 ARIZONA_AOD_IRQ_INDEX));
427 irq_domain_remove(arizona->virq);
432 int arizona_irq_exit(struct arizona *arizona)
436 if (arizona->ctrlif_error)
437 arizona_free_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR, arizona);
438 arizona_free_irq(arizona, ARIZONA_IRQ_BOOT_DONE, arizona);
440 virq = irq_find_mapping(arizona->virq, ARIZONA_MAIN_IRQ_INDEX);
441 regmap_del_irq_chip(virq, arizona->irq_chip);
442 irq_dispose_mapping(virq);
444 virq = irq_find_mapping(arizona->virq, ARIZONA_AOD_IRQ_INDEX);
445 regmap_del_irq_chip(virq, arizona->aod_irq_chip);
446 irq_dispose_mapping(virq);
448 irq_domain_remove(arizona->virq);
450 free_irq(arizona->irq, arizona);