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
;
100 ret
= pm_runtime_get_sync(arizona
->dev
);
102 dev_err(arizona
->dev
, "Failed to resume device: %d\n", ret
);
106 /* Always handle the AoD domain */
107 handle_nested_irq(irq_find_mapping(arizona
->virq
, 0));
110 * Check if one of the main interrupts is asserted and only
111 * check that domain if it is.
113 ret
= regmap_read(arizona
->regmap
, ARIZONA_IRQ_PIN_STATUS
, &val
);
114 if (ret
== 0 && val
& ARIZONA_IRQ1_STS
) {
115 handle_nested_irq(irq_find_mapping(arizona
->virq
, 1));
116 } else if (ret
!= 0) {
117 dev_err(arizona
->dev
, "Failed to read main IRQ status: %d\n",
121 pm_runtime_mark_last_busy(arizona
->dev
);
122 pm_runtime_put_autosuspend(arizona
->dev
);
127 static void arizona_irq_enable(struct irq_data
*data
)
131 static void arizona_irq_disable(struct irq_data
*data
)
135 static struct irq_chip arizona_irq_chip
= {
137 .irq_disable
= arizona_irq_disable
,
138 .irq_enable
= arizona_irq_enable
,
141 static int arizona_irq_map(struct irq_domain
*h
, unsigned int virq
,
144 struct regmap_irq_chip_data
*data
= h
->host_data
;
146 irq_set_chip_data(virq
, data
);
147 irq_set_chip_and_handler(virq
, &arizona_irq_chip
, handle_edge_irq
);
148 irq_set_nested_thread(virq
, 1);
150 /* ARM needs us to explicitly flag the IRQ as valid
151 * and will set them noprobe when we do so. */
153 set_irq_flags(virq
, IRQF_VALID
);
155 irq_set_noprobe(virq
);
161 static struct irq_domain_ops arizona_domain_ops
= {
162 .map
= arizona_irq_map
,
163 .xlate
= irq_domain_xlate_twocell
,
166 int arizona_irq_init(struct arizona
*arizona
)
168 int flags
= IRQF_ONESHOT
;
170 const struct regmap_irq_chip
*aod
, *irq
;
171 bool ctrlif_error
= true;
173 switch (arizona
->type
) {
174 #ifdef CONFIG_MFD_WM5102
179 ctrlif_error
= false;
182 #ifdef CONFIG_MFD_WM5110
187 ctrlif_error
= false;
191 BUG_ON("Unknown Arizona class device" == NULL
);
195 if (arizona
->pdata
.irq_active_high
) {
196 ret
= regmap_update_bits(arizona
->regmap
, ARIZONA_IRQ_CTRL_1
,
199 dev_err(arizona
->dev
, "Couldn't set IRQ polarity: %d\n",
204 flags
|= IRQF_TRIGGER_HIGH
;
206 flags
|= IRQF_TRIGGER_LOW
;
209 /* Allocate a virtual IRQ domain to distribute to the regmap domains */
210 arizona
->virq
= irq_domain_add_linear(NULL
, 2, &arizona_domain_ops
,
212 if (!arizona
->virq
) {
213 dev_err(arizona
->dev
, "Failed to add core IRQ domain\n");
218 ret
= regmap_add_irq_chip(arizona
->regmap
,
219 irq_create_mapping(arizona
->virq
, 0),
220 IRQF_ONESHOT
, -1, aod
,
221 &arizona
->aod_irq_chip
);
223 dev_err(arizona
->dev
, "Failed to add AOD IRQs: %d\n", ret
);
227 ret
= regmap_add_irq_chip(arizona
->regmap
,
228 irq_create_mapping(arizona
->virq
, 1),
229 IRQF_ONESHOT
, -1, irq
,
232 dev_err(arizona
->dev
, "Failed to add AOD IRQs: %d\n", ret
);
236 /* Make sure the boot done IRQ is unmasked for resumes */
237 i
= arizona_map_irq(arizona
, ARIZONA_IRQ_BOOT_DONE
);
238 ret
= request_threaded_irq(i
, NULL
, arizona_boot_done
, IRQF_ONESHOT
,
239 "Boot done", arizona
);
241 dev_err(arizona
->dev
, "Failed to request boot done %d: %d\n",
246 /* Handle control interface errors in the core */
248 i
= arizona_map_irq(arizona
, ARIZONA_IRQ_CTRLIF_ERR
);
249 ret
= request_threaded_irq(i
, NULL
, arizona_ctrlif_err
,
251 "Control interface error", arizona
);
253 dev_err(arizona
->dev
,
254 "Failed to request CTRLIF_ERR %d: %d\n",
260 ret
= request_threaded_irq(arizona
->irq
, NULL
, arizona_irq_thread
,
261 flags
, "arizona", arizona
);
264 dev_err(arizona
->dev
, "Failed to request IRQ %d: %d\n",
272 free_irq(arizona_map_irq(arizona
, ARIZONA_IRQ_CTRLIF_ERR
), arizona
);
274 free_irq(arizona_map_irq(arizona
, ARIZONA_IRQ_BOOT_DONE
), arizona
);
276 regmap_del_irq_chip(irq_create_mapping(arizona
->virq
, 1),
279 regmap_del_irq_chip(irq_create_mapping(arizona
->virq
, 0),
280 arizona
->aod_irq_chip
);
286 int arizona_irq_exit(struct arizona
*arizona
)
288 free_irq(arizona_map_irq(arizona
, ARIZONA_IRQ_CTRLIF_ERR
), arizona
);
289 free_irq(arizona_map_irq(arizona
, ARIZONA_IRQ_BOOT_DONE
), arizona
);
290 regmap_del_irq_chip(irq_create_mapping(arizona
->virq
, 1),
292 regmap_del_irq_chip(irq_create_mapping(arizona
->virq
, 0),
293 arizona
->aod_irq_chip
);
294 free_irq(arizona
->irq
, arizona
);