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 struct irq_data
*irq_data
;
193 arizona
->ctrlif_error
= true;
195 switch (arizona
->type
) {
196 #ifdef CONFIG_MFD_WM5102
201 arizona
->ctrlif_error
= false;
204 #ifdef CONFIG_MFD_WM5110
208 switch (arizona
->rev
) {
213 irq
= &wm5110_revd_irq
;
217 arizona
->ctrlif_error
= false;
220 #ifdef CONFIG_MFD_WM8997
225 arizona
->ctrlif_error
= false;
229 BUG_ON("Unknown Arizona class device" == NULL
);
233 /* Disable all wake sources by default */
234 regmap_write(arizona
->regmap
, ARIZONA_WAKE_CONTROL
, 0);
236 /* Read the flags from the interrupt controller if not specified */
237 if (!arizona
->pdata
.irq_flags
) {
238 irq_data
= irq_get_irq_data(arizona
->irq
);
240 dev_err(arizona
->dev
, "Invalid IRQ: %d\n",
245 arizona
->pdata
.irq_flags
= irqd_get_trigger_type(irq_data
);
246 switch (arizona
->pdata
.irq_flags
) {
247 case IRQF_TRIGGER_LOW
:
248 case IRQF_TRIGGER_HIGH
:
249 case IRQF_TRIGGER_RISING
:
250 case IRQF_TRIGGER_FALLING
:
256 arizona
->pdata
.irq_flags
= IRQF_TRIGGER_LOW
;
261 if (arizona
->pdata
.irq_flags
& (IRQF_TRIGGER_HIGH
|
262 IRQF_TRIGGER_RISING
)) {
263 ret
= regmap_update_bits(arizona
->regmap
, ARIZONA_IRQ_CTRL_1
,
266 dev_err(arizona
->dev
, "Couldn't set IRQ polarity: %d\n",
272 flags
|= arizona
->pdata
.irq_flags
;
274 /* Allocate a virtual IRQ domain to distribute to the regmap domains */
275 arizona
->virq
= irq_domain_add_linear(NULL
, 2, &arizona_domain_ops
,
277 if (!arizona
->virq
) {
278 dev_err(arizona
->dev
, "Failed to add core IRQ domain\n");
283 ret
= regmap_add_irq_chip(arizona
->regmap
,
284 irq_create_mapping(arizona
->virq
, 0),
285 IRQF_ONESHOT
, -1, aod
,
286 &arizona
->aod_irq_chip
);
288 dev_err(arizona
->dev
, "Failed to add AOD IRQs: %d\n", ret
);
292 ret
= regmap_add_irq_chip(arizona
->regmap
,
293 irq_create_mapping(arizona
->virq
, 1),
294 IRQF_ONESHOT
, -1, irq
,
297 dev_err(arizona
->dev
, "Failed to add main IRQs: %d\n", ret
);
301 /* Make sure the boot done IRQ is unmasked for resumes */
302 i
= arizona_map_irq(arizona
, ARIZONA_IRQ_BOOT_DONE
);
303 ret
= request_threaded_irq(i
, NULL
, arizona_boot_done
, IRQF_ONESHOT
,
304 "Boot done", arizona
);
306 dev_err(arizona
->dev
, "Failed to request boot done %d: %d\n",
311 /* Handle control interface errors in the core */
312 if (arizona
->ctrlif_error
) {
313 i
= arizona_map_irq(arizona
, ARIZONA_IRQ_CTRLIF_ERR
);
314 ret
= request_threaded_irq(i
, NULL
, arizona_ctrlif_err
,
316 "Control interface error", arizona
);
318 dev_err(arizona
->dev
,
319 "Failed to request CTRLIF_ERR %d: %d\n",
325 /* Used to emulate edge trigger and to work around broken pinmux */
326 if (arizona
->pdata
.irq_gpio
) {
327 if (gpio_to_irq(arizona
->pdata
.irq_gpio
) != arizona
->irq
) {
328 dev_warn(arizona
->dev
, "IRQ %d is not GPIO %d (%d)\n",
329 arizona
->irq
, arizona
->pdata
.irq_gpio
,
330 gpio_to_irq(arizona
->pdata
.irq_gpio
));
331 arizona
->irq
= gpio_to_irq(arizona
->pdata
.irq_gpio
);
334 ret
= devm_gpio_request_one(arizona
->dev
,
335 arizona
->pdata
.irq_gpio
,
336 GPIOF_IN
, "arizona IRQ");
338 dev_err(arizona
->dev
,
339 "Failed to request IRQ GPIO %d:: %d\n",
340 arizona
->pdata
.irq_gpio
, ret
);
341 arizona
->pdata
.irq_gpio
= 0;
345 ret
= request_threaded_irq(arizona
->irq
, NULL
, arizona_irq_thread
,
346 flags
, "arizona", arizona
);
349 dev_err(arizona
->dev
, "Failed to request primary IRQ %d: %d\n",
357 if (arizona
->ctrlif_error
)
358 free_irq(arizona_map_irq(arizona
, ARIZONA_IRQ_CTRLIF_ERR
),
361 free_irq(arizona_map_irq(arizona
, ARIZONA_IRQ_BOOT_DONE
), arizona
);
363 regmap_del_irq_chip(irq_create_mapping(arizona
->virq
, 1),
366 regmap_del_irq_chip(irq_create_mapping(arizona
->virq
, 0),
367 arizona
->aod_irq_chip
);
373 int arizona_irq_exit(struct arizona
*arizona
)
375 if (arizona
->ctrlif_error
)
376 free_irq(arizona_map_irq(arizona
, ARIZONA_IRQ_CTRLIF_ERR
),
378 free_irq(arizona_map_irq(arizona
, ARIZONA_IRQ_BOOT_DONE
), arizona
);
379 regmap_del_irq_chip(irq_create_mapping(arizona
->virq
, 1),
381 regmap_del_irq_chip(irq_create_mapping(arizona
->virq
, 0),
382 arizona
->aod_irq_chip
);
383 free_irq(arizona
->irq
, arizona
);