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 ret = regmap_irq_get_virq(arizona->aod_irq_chip, irq);
35 ret = regmap_irq_get_virq(arizona->irq_chip, irq);
40 int arizona_request_irq(struct arizona *arizona, int irq, char *name,
41 irq_handler_t handler, void *data)
43 irq = arizona_map_irq(arizona, irq);
47 return request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT,
50 EXPORT_SYMBOL_GPL(arizona_request_irq);
52 void arizona_free_irq(struct arizona *arizona, int irq, void *data)
54 irq = arizona_map_irq(arizona, irq);
60 EXPORT_SYMBOL_GPL(arizona_free_irq);
62 int arizona_set_irq_wake(struct arizona *arizona, int irq, int on)
64 irq = arizona_map_irq(arizona, irq);
68 return irq_set_irq_wake(irq, on);
70 EXPORT_SYMBOL_GPL(arizona_set_irq_wake);
72 static irqreturn_t arizona_boot_done(int irq, void *data)
74 struct arizona *arizona = data;
76 dev_dbg(arizona->dev, "Boot done\n");
81 static irqreturn_t arizona_ctrlif_err(int irq, void *data)
83 struct arizona *arizona = data;
86 * For pretty much all potential sources a register cache sync
87 * won't help, we've just got a software bug somewhere.
89 dev_err(arizona->dev, "Control interface error\n");
94 static irqreturn_t arizona_irq_thread(int irq, void *data)
96 struct arizona *arizona = data;
101 ret = pm_runtime_get_sync(arizona->dev);
103 dev_err(arizona->dev, "Failed to resume device: %d\n", ret);
110 /* Always handle the AoD domain */
111 handle_nested_irq(irq_find_mapping(arizona->virq, 0));
114 * Check if one of the main interrupts is asserted and only
115 * check that domain if it is.
117 ret = regmap_read(arizona->regmap, ARIZONA_IRQ_PIN_STATUS,
119 if (ret == 0 && val & ARIZONA_IRQ1_STS) {
120 handle_nested_irq(irq_find_mapping(arizona->virq, 1));
121 } else if (ret != 0) {
122 dev_err(arizona->dev,
123 "Failed to read main IRQ status: %d\n", ret);
127 * Poll the IRQ pin status to see if we're really done
128 * if the interrupt controller can't do it for us.
130 if (!arizona->pdata.irq_gpio) {
132 } else if (arizona->pdata.irq_flags & IRQF_TRIGGER_RISING &&
133 gpio_get_value_cansleep(arizona->pdata.irq_gpio)) {
135 } else if (arizona->pdata.irq_flags & IRQF_TRIGGER_FALLING &&
136 !gpio_get_value_cansleep(arizona->pdata.irq_gpio)) {
141 pm_runtime_mark_last_busy(arizona->dev);
142 pm_runtime_put_autosuspend(arizona->dev);
147 static void arizona_irq_enable(struct irq_data *data)
151 static void arizona_irq_disable(struct irq_data *data)
155 static struct irq_chip arizona_irq_chip = {
157 .irq_disable = arizona_irq_disable,
158 .irq_enable = arizona_irq_enable,
161 static int arizona_irq_map(struct irq_domain *h, unsigned int virq,
164 struct regmap_irq_chip_data *data = h->host_data;
166 irq_set_chip_data(virq, data);
167 irq_set_chip_and_handler(virq, &arizona_irq_chip, handle_edge_irq);
168 irq_set_nested_thread(virq, 1);
170 /* ARM needs us to explicitly flag the IRQ as valid
171 * and will set them noprobe when we do so. */
173 set_irq_flags(virq, IRQF_VALID);
175 irq_set_noprobe(virq);
181 static struct irq_domain_ops arizona_domain_ops = {
182 .map = arizona_irq_map,
183 .xlate = irq_domain_xlate_twocell,
186 int arizona_irq_init(struct arizona *arizona)
188 int flags = IRQF_ONESHOT;
190 const struct regmap_irq_chip *aod, *irq;
191 bool ctrlif_error = true;
192 struct irq_data *irq_data;
194 switch (arizona->type) {
195 #ifdef CONFIG_MFD_WM5102
200 ctrlif_error = false;
203 #ifdef CONFIG_MFD_WM5110
208 ctrlif_error = false;
211 #ifdef CONFIG_MFD_WM8997
216 ctrlif_error = false;
220 BUG_ON("Unknown Arizona class device" == NULL);
224 /* Disable all wake sources by default */
225 regmap_write(arizona->regmap, ARIZONA_WAKE_CONTROL, 0);
227 /* Read the flags from the interrupt controller if not specified */
228 if (!arizona->pdata.irq_flags) {
229 irq_data = irq_get_irq_data(arizona->irq);
231 dev_err(arizona->dev, "Invalid IRQ: %d\n",
236 arizona->pdata.irq_flags = irqd_get_trigger_type(irq_data);
237 switch (arizona->pdata.irq_flags) {
238 case IRQF_TRIGGER_LOW:
239 case IRQF_TRIGGER_HIGH:
240 case IRQF_TRIGGER_RISING:
241 case IRQF_TRIGGER_FALLING:
247 arizona->pdata.irq_flags = IRQF_TRIGGER_LOW;
252 if (arizona->pdata.irq_flags & (IRQF_TRIGGER_HIGH |
253 IRQF_TRIGGER_RISING)) {
254 ret = regmap_update_bits(arizona->regmap, ARIZONA_IRQ_CTRL_1,
257 dev_err(arizona->dev, "Couldn't set IRQ polarity: %d\n",
263 flags |= arizona->pdata.irq_flags;
265 /* Allocate a virtual IRQ domain to distribute to the regmap domains */
266 arizona->virq = irq_domain_add_linear(NULL, 2, &arizona_domain_ops,
268 if (!arizona->virq) {
269 dev_err(arizona->dev, "Failed to add core IRQ domain\n");
274 ret = regmap_add_irq_chip(arizona->regmap,
275 irq_create_mapping(arizona->virq, 0),
276 IRQF_ONESHOT, -1, aod,
277 &arizona->aod_irq_chip);
279 dev_err(arizona->dev, "Failed to add AOD IRQs: %d\n", ret);
283 ret = regmap_add_irq_chip(arizona->regmap,
284 irq_create_mapping(arizona->virq, 1),
285 IRQF_ONESHOT, -1, irq,
288 dev_err(arizona->dev, "Failed to add AOD IRQs: %d\n", ret);
292 /* Make sure the boot done IRQ is unmasked for resumes */
293 i = arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE);
294 ret = request_threaded_irq(i, NULL, arizona_boot_done, IRQF_ONESHOT,
295 "Boot done", arizona);
297 dev_err(arizona->dev, "Failed to request boot done %d: %d\n",
302 /* Handle control interface errors in the core */
304 i = arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR);
305 ret = request_threaded_irq(i, NULL, arizona_ctrlif_err,
307 "Control interface error", arizona);
309 dev_err(arizona->dev,
310 "Failed to request CTRLIF_ERR %d: %d\n",
316 /* Used to emulate edge trigger and to work around broken pinmux */
317 if (arizona->pdata.irq_gpio) {
318 if (gpio_to_irq(arizona->pdata.irq_gpio) != arizona->irq) {
319 dev_warn(arizona->dev, "IRQ %d is not GPIO %d (%d)\n",
320 arizona->irq, arizona->pdata.irq_gpio,
321 gpio_to_irq(arizona->pdata.irq_gpio));
322 arizona->irq = gpio_to_irq(arizona->pdata.irq_gpio);
325 ret = devm_gpio_request_one(arizona->dev,
326 arizona->pdata.irq_gpio,
327 GPIOF_IN, "arizona IRQ");
329 dev_err(arizona->dev,
330 "Failed to request IRQ GPIO %d:: %d\n",
331 arizona->pdata.irq_gpio, ret);
332 arizona->pdata.irq_gpio = 0;
336 ret = request_threaded_irq(arizona->irq, NULL, arizona_irq_thread,
337 flags, "arizona", arizona);
340 dev_err(arizona->dev, "Failed to request primary IRQ %d: %d\n",
348 free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR), arizona);
350 free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona);
352 regmap_del_irq_chip(irq_create_mapping(arizona->virq, 1),
355 regmap_del_irq_chip(irq_create_mapping(arizona->virq, 0),
356 arizona->aod_irq_chip);
362 int arizona_irq_exit(struct arizona *arizona)
364 free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR), arizona);
365 free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona);
366 regmap_del_irq_chip(irq_create_mapping(arizona->virq, 1),
368 regmap_del_irq_chip(irq_create_mapping(arizona->virq, 0),
369 arizona->aod_irq_chip);
370 free_irq(arizona->irq, arizona);