Root/drivers/mfd/wm8994-irq.c

1/*
2 * wm8994-irq.c -- Interrupt controller support for Wolfson WM8994
3 *
4 * Copyright 2010 Wolfson Microelectronics PLC.
5 *
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 */
14
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/i2c.h>
18#include <linux/irq.h>
19#include <linux/mfd/core.h>
20#include <linux/interrupt.h>
21#include <linux/regmap.h>
22
23#include <linux/mfd/wm8994/core.h>
24#include <linux/mfd/wm8994/pdata.h>
25#include <linux/mfd/wm8994/registers.h>
26
27#include <linux/delay.h>
28
29static struct regmap_irq wm8994_irqs[] = {
30    [WM8994_IRQ_TEMP_SHUT] = {
31        .reg_offset = 1,
32        .mask = WM8994_TEMP_SHUT_EINT,
33    },
34    [WM8994_IRQ_MIC1_DET] = {
35        .reg_offset = 1,
36        .mask = WM8994_MIC1_DET_EINT,
37    },
38    [WM8994_IRQ_MIC1_SHRT] = {
39        .reg_offset = 1,
40        .mask = WM8994_MIC1_SHRT_EINT,
41    },
42    [WM8994_IRQ_MIC2_DET] = {
43        .reg_offset = 1,
44        .mask = WM8994_MIC2_DET_EINT,
45    },
46    [WM8994_IRQ_MIC2_SHRT] = {
47        .reg_offset = 1,
48        .mask = WM8994_MIC2_SHRT_EINT,
49    },
50    [WM8994_IRQ_FLL1_LOCK] = {
51        .reg_offset = 1,
52        .mask = WM8994_FLL1_LOCK_EINT,
53    },
54    [WM8994_IRQ_FLL2_LOCK] = {
55        .reg_offset = 1,
56        .mask = WM8994_FLL2_LOCK_EINT,
57    },
58    [WM8994_IRQ_SRC1_LOCK] = {
59        .reg_offset = 1,
60        .mask = WM8994_SRC1_LOCK_EINT,
61    },
62    [WM8994_IRQ_SRC2_LOCK] = {
63        .reg_offset = 1,
64        .mask = WM8994_SRC2_LOCK_EINT,
65    },
66    [WM8994_IRQ_AIF1DRC1_SIG_DET] = {
67        .reg_offset = 1,
68        .mask = WM8994_AIF1DRC1_SIG_DET,
69    },
70    [WM8994_IRQ_AIF1DRC2_SIG_DET] = {
71        .reg_offset = 1,
72        .mask = WM8994_AIF1DRC2_SIG_DET_EINT,
73    },
74    [WM8994_IRQ_AIF2DRC_SIG_DET] = {
75        .reg_offset = 1,
76        .mask = WM8994_AIF2DRC_SIG_DET_EINT,
77    },
78    [WM8994_IRQ_FIFOS_ERR] = {
79        .reg_offset = 1,
80        .mask = WM8994_FIFOS_ERR_EINT,
81    },
82    [WM8994_IRQ_WSEQ_DONE] = {
83        .reg_offset = 1,
84        .mask = WM8994_WSEQ_DONE_EINT,
85    },
86    [WM8994_IRQ_DCS_DONE] = {
87        .reg_offset = 1,
88        .mask = WM8994_DCS_DONE_EINT,
89    },
90    [WM8994_IRQ_TEMP_WARN] = {
91        .reg_offset = 1,
92        .mask = WM8994_TEMP_WARN_EINT,
93    },
94    [WM8994_IRQ_GPIO(1)] = {
95        .mask = WM8994_GP1_EINT,
96    },
97    [WM8994_IRQ_GPIO(2)] = {
98        .mask = WM8994_GP2_EINT,
99    },
100    [WM8994_IRQ_GPIO(3)] = {
101        .mask = WM8994_GP3_EINT,
102    },
103    [WM8994_IRQ_GPIO(4)] = {
104        .mask = WM8994_GP4_EINT,
105    },
106    [WM8994_IRQ_GPIO(5)] = {
107        .mask = WM8994_GP5_EINT,
108    },
109    [WM8994_IRQ_GPIO(6)] = {
110        .mask = WM8994_GP6_EINT,
111    },
112    [WM8994_IRQ_GPIO(7)] = {
113        .mask = WM8994_GP7_EINT,
114    },
115    [WM8994_IRQ_GPIO(8)] = {
116        .mask = WM8994_GP8_EINT,
117    },
118    [WM8994_IRQ_GPIO(9)] = {
119        .mask = WM8994_GP8_EINT,
120    },
121    [WM8994_IRQ_GPIO(10)] = {
122        .mask = WM8994_GP10_EINT,
123    },
124    [WM8994_IRQ_GPIO(11)] = {
125        .mask = WM8994_GP11_EINT,
126    },
127};
128
129static struct regmap_irq_chip wm8994_irq_chip = {
130    .name = "wm8994",
131    .irqs = wm8994_irqs,
132    .num_irqs = ARRAY_SIZE(wm8994_irqs),
133
134    .num_regs = 2,
135    .status_base = WM8994_INTERRUPT_STATUS_1,
136    .mask_base = WM8994_INTERRUPT_STATUS_1_MASK,
137    .ack_base = WM8994_INTERRUPT_STATUS_1,
138};
139
140int wm8994_irq_init(struct wm8994 *wm8994)
141{
142    int ret;
143    unsigned long irqflags;
144    struct wm8994_pdata *pdata = wm8994->dev->platform_data;
145
146    if (!wm8994->irq) {
147        dev_warn(wm8994->dev,
148             "No interrupt specified, no interrupts\n");
149        wm8994->irq_base = 0;
150        return 0;
151    }
152
153    /* select user or default irq flags */
154    irqflags = IRQF_TRIGGER_HIGH | IRQF_ONESHOT;
155    if (pdata->irq_flags)
156        irqflags = pdata->irq_flags;
157
158    ret = regmap_add_irq_chip(wm8994->regmap, wm8994->irq,
159                  irqflags,
160                  wm8994->irq_base, &wm8994_irq_chip,
161                  &wm8994->irq_data);
162    if (ret != 0) {
163        dev_err(wm8994->dev, "Failed to register IRQ chip: %d\n", ret);
164        return ret;
165    }
166
167    /* Enable top level interrupt if it was masked */
168    wm8994_reg_write(wm8994, WM8994_INTERRUPT_CONTROL, 0);
169
170    return 0;
171}
172
173void wm8994_irq_exit(struct wm8994 *wm8994)
174{
175    regmap_del_irq_chip(wm8994->irq, wm8994->irq_data);
176}
177

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