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 static int arizona_map_irq(struct arizona *arizona, int irq)
33 if (arizona->aod_irq_chip) {
34 ret = regmap_irq_get_virq(arizona->aod_irq_chip, irq);
39 return regmap_irq_get_virq(arizona->irq_chip, irq);
42 int arizona_request_irq(struct arizona *arizona, int irq, char *name,
43 irq_handler_t handler, void *data)
45 irq = arizona_map_irq(arizona, irq);
49 return request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT,
52 EXPORT_SYMBOL_GPL(arizona_request_irq);
54 void arizona_free_irq(struct arizona *arizona, int irq, void *data)
56 irq = arizona_map_irq(arizona, irq);
62 EXPORT_SYMBOL_GPL(arizona_free_irq);
64 int arizona_set_irq_wake(struct arizona *arizona, int irq, int on)
66 irq = arizona_map_irq(arizona, irq);
70 return irq_set_irq_wake(irq, on);
72 EXPORT_SYMBOL_GPL(arizona_set_irq_wake);
74 static irqreturn_t arizona_boot_done(int irq, void *data)
76 struct arizona *arizona = data;
78 dev_dbg(arizona->dev, "Boot done\n");
83 static irqreturn_t arizona_ctrlif_err(int irq, void *data)
85 struct arizona *arizona = data;
88 * For pretty much all potential sources a register cache sync
89 * won't help, we've just got a software bug somewhere.
91 dev_err(arizona->dev, "Control interface error\n");
96 static irqreturn_t arizona_irq_thread(int irq, void *data)
98 struct arizona *arizona = data;
103 ret = pm_runtime_get_sync(arizona->dev);
105 dev_err(arizona->dev, "Failed to resume device: %d\n", ret);
112 if (arizona->aod_irq_chip)
113 handle_nested_irq(irq_find_mapping(arizona->virq, 0));
116 * Check if one of the main interrupts is asserted and only
117 * check that domain if it is.
119 ret = regmap_read(arizona->regmap, ARIZONA_IRQ_PIN_STATUS,
121 if (ret == 0 && val & ARIZONA_IRQ1_STS) {
122 handle_nested_irq(irq_find_mapping(arizona->virq, 1));
123 } else if (ret != 0) {
124 dev_err(arizona->dev,
125 "Failed to read main IRQ status: %d\n", ret);
129 * Poll the IRQ pin status to see if we're really done
130 * if the interrupt controller can't do it for us.
132 if (!arizona->pdata.irq_gpio) {
134 } else if (arizona->pdata.irq_flags & IRQF_TRIGGER_RISING &&
135 gpio_get_value_cansleep(arizona->pdata.irq_gpio)) {
137 } else if (arizona->pdata.irq_flags & IRQF_TRIGGER_FALLING &&
138 !gpio_get_value_cansleep(arizona->pdata.irq_gpio)) {
143 pm_runtime_mark_last_busy(arizona->dev);
144 pm_runtime_put_autosuspend(arizona->dev);
149 static void arizona_irq_enable(struct irq_data *data)
153 static void arizona_irq_disable(struct irq_data *data)
157 static int arizona_irq_set_wake(struct irq_data *data, unsigned int on)
159 struct arizona *arizona = irq_data_get_irq_chip_data(data);
161 return irq_set_irq_wake(arizona->irq, on);
164 static struct irq_chip arizona_irq_chip = {
166 .irq_disable = arizona_irq_disable,
167 .irq_enable = arizona_irq_enable,
168 .irq_set_wake = arizona_irq_set_wake,
171 static int arizona_irq_map(struct irq_domain *h, unsigned int virq,
174 struct arizona *data = h->host_data;
176 irq_set_chip_data(virq, data);
177 irq_set_chip_and_handler(virq, &arizona_irq_chip, handle_simple_irq);
178 irq_set_nested_thread(virq, 1);
179 irq_set_noprobe(virq);
184 static const struct irq_domain_ops arizona_domain_ops = {
185 .map = arizona_irq_map,
186 .xlate = irq_domain_xlate_twocell,
189 int arizona_irq_init(struct arizona *arizona)
191 int flags = IRQF_ONESHOT;
193 const struct regmap_irq_chip *aod, *irq;
194 struct irq_data *irq_data;
196 arizona->ctrlif_error = true;
198 switch (arizona->type) {
199 #ifdef CONFIG_MFD_WM5102
204 arizona->ctrlif_error = false;
207 #ifdef CONFIG_MFD_WM5110
212 switch (arizona->rev) {
217 irq = &wm5110_revd_irq;
221 arizona->ctrlif_error = false;
224 #ifdef CONFIG_MFD_CS47L24
230 arizona->ctrlif_error = false;
233 #ifdef CONFIG_MFD_WM8997
238 arizona->ctrlif_error = false;
241 #ifdef CONFIG_MFD_WM8998
247 arizona->ctrlif_error = false;
251 BUG_ON("Unknown Arizona class device" == NULL);
255 /* Disable all wake sources by default */
256 regmap_write(arizona->regmap, ARIZONA_WAKE_CONTROL, 0);
258 /* Read the flags from the interrupt controller if not specified */
259 if (!arizona->pdata.irq_flags) {
260 irq_data = irq_get_irq_data(arizona->irq);
262 dev_err(arizona->dev, "Invalid IRQ: %d\n",
267 arizona->pdata.irq_flags = irqd_get_trigger_type(irq_data);
268 switch (arizona->pdata.irq_flags) {
269 case IRQF_TRIGGER_LOW:
270 case IRQF_TRIGGER_HIGH:
271 case IRQF_TRIGGER_RISING:
272 case IRQF_TRIGGER_FALLING:
278 arizona->pdata.irq_flags = IRQF_TRIGGER_LOW;
283 if (arizona->pdata.irq_flags & (IRQF_TRIGGER_HIGH |
284 IRQF_TRIGGER_RISING)) {
285 ret = regmap_update_bits(arizona->regmap, ARIZONA_IRQ_CTRL_1,
288 dev_err(arizona->dev, "Couldn't set IRQ polarity: %d\n",
294 flags |= arizona->pdata.irq_flags;
296 /* Allocate a virtual IRQ domain to distribute to the regmap domains */
297 arizona->virq = irq_domain_add_linear(NULL, 2, &arizona_domain_ops,
299 if (!arizona->virq) {
300 dev_err(arizona->dev, "Failed to add core IRQ domain\n");
306 ret = regmap_add_irq_chip(arizona->regmap,
307 irq_create_mapping(arizona->virq, 0),
308 IRQF_ONESHOT, 0, aod,
309 &arizona->aod_irq_chip);
311 dev_err(arizona->dev,
312 "Failed to add AOD IRQs: %d\n", ret);
317 ret = regmap_add_irq_chip(arizona->regmap,
318 irq_create_mapping(arizona->virq, 1),
319 IRQF_ONESHOT, 0, irq,
322 dev_err(arizona->dev, "Failed to add main IRQs: %d\n", ret);
326 /* Used to emulate edge trigger and to work around broken pinmux */
327 if (arizona->pdata.irq_gpio) {
328 if (gpio_to_irq(arizona->pdata.irq_gpio) != arizona->irq) {
329 dev_warn(arizona->dev, "IRQ %d is not GPIO %d (%d)\n",
330 arizona->irq, arizona->pdata.irq_gpio,
331 gpio_to_irq(arizona->pdata.irq_gpio));
332 arizona->irq = gpio_to_irq(arizona->pdata.irq_gpio);
335 ret = devm_gpio_request_one(arizona->dev,
336 arizona->pdata.irq_gpio,
337 GPIOF_IN, "arizona IRQ");
339 dev_err(arizona->dev,
340 "Failed to request IRQ GPIO %d:: %d\n",
341 arizona->pdata.irq_gpio, ret);
342 arizona->pdata.irq_gpio = 0;
346 ret = request_threaded_irq(arizona->irq, NULL, arizona_irq_thread,
347 flags, "arizona", arizona);
350 dev_err(arizona->dev, "Failed to request primary IRQ %d: %d\n",
355 /* Make sure the boot done IRQ is unmasked for resumes */
356 i = arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE);
357 ret = request_threaded_irq(i, NULL, arizona_boot_done, IRQF_ONESHOT,
358 "Boot done", arizona);
360 dev_err(arizona->dev, "Failed to request boot done %d: %d\n",
365 /* Handle control interface errors in the core */
366 if (arizona->ctrlif_error) {
367 i = arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR);
368 ret = request_threaded_irq(i, NULL, arizona_ctrlif_err,
370 "Control interface error", arizona);
372 dev_err(arizona->dev,
373 "Failed to request CTRLIF_ERR %d: %d\n",
382 free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona);
384 free_irq(arizona->irq, arizona);
386 regmap_del_irq_chip(irq_create_mapping(arizona->virq, 1),
389 regmap_del_irq_chip(irq_create_mapping(arizona->virq, 0),
390 arizona->aod_irq_chip);
395 int arizona_irq_exit(struct arizona *arizona)
397 if (arizona->ctrlif_error)
398 free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR),
400 free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona);
401 regmap_del_irq_chip(irq_create_mapping(arizona->virq, 1),
403 regmap_del_irq_chip(irq_create_mapping(arizona->virq, 0),
404 arizona->aod_irq_chip);
405 free_irq(arizona->irq, arizona);