tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * include/linux/mfd/wm8994/core.h -- Core interface for WM8994
3 *
4 * Copyright 2009 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#ifndef __MFD_WM8994_CORE_H__
16#define __MFD_WM8994_CORE_H__
17
18#include <linux/interrupt.h>
19
20enum wm8994_type {
21 WM8994 = 0,
22 WM8958 = 1,
23 WM1811 = 2,
24};
25
26struct regulator_dev;
27struct regulator_bulk_data;
28struct regmap;
29
30#define WM8994_NUM_GPIO_REGS 11
31#define WM8994_NUM_LDO_REGS 2
32#define WM8994_NUM_IRQ_REGS 2
33
34#define WM8994_IRQ_TEMP_SHUT 0
35#define WM8994_IRQ_MIC1_DET 1
36#define WM8994_IRQ_MIC1_SHRT 2
37#define WM8994_IRQ_MIC2_DET 3
38#define WM8994_IRQ_MIC2_SHRT 4
39#define WM8994_IRQ_FLL1_LOCK 5
40#define WM8994_IRQ_FLL2_LOCK 6
41#define WM8994_IRQ_SRC1_LOCK 7
42#define WM8994_IRQ_SRC2_LOCK 8
43#define WM8994_IRQ_AIF1DRC1_SIG_DET 9
44#define WM8994_IRQ_AIF1DRC2_SIG_DET 10
45#define WM8994_IRQ_AIF2DRC_SIG_DET 11
46#define WM8994_IRQ_FIFOS_ERR 12
47#define WM8994_IRQ_WSEQ_DONE 13
48#define WM8994_IRQ_DCS_DONE 14
49#define WM8994_IRQ_TEMP_WARN 15
50
51/* GPIOs in the chip are numbered from 1-11 */
52#define WM8994_IRQ_GPIO(x) (x + WM8994_IRQ_TEMP_WARN)
53
54struct wm8994 {
55 struct mutex irq_lock;
56
57 enum wm8994_type type;
58
59 struct device *dev;
60 struct regmap *regmap;
61
62 bool ldo_ena_always_driven;
63
64 int gpio_base;
65 int irq_base;
66
67 int irq;
68 u16 irq_masks_cur[WM8994_NUM_IRQ_REGS];
69 u16 irq_masks_cache[WM8994_NUM_IRQ_REGS];
70
71 /* Used over suspend/resume */
72 bool suspended;
73 u16 ldo_regs[WM8994_NUM_LDO_REGS];
74 u16 gpio_regs[WM8994_NUM_GPIO_REGS];
75
76 struct regulator_dev *dbvdd;
77 int num_supplies;
78 struct regulator_bulk_data *supplies;
79};
80
81/* Device I/O API */
82int wm8994_reg_read(struct wm8994 *wm8994, unsigned short reg);
83int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg,
84 unsigned short val);
85int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg,
86 unsigned short mask, unsigned short val);
87int wm8994_bulk_read(struct wm8994 *wm8994, unsigned short reg,
88 int count, u16 *buf);
89int wm8994_bulk_write(struct wm8994 *wm8994, unsigned short reg,
90 int count, const u16 *buf);
91
92
93/* Helper to save on boilerplate */
94static inline int wm8994_request_irq(struct wm8994 *wm8994, int irq,
95 irq_handler_t handler, const char *name,
96 void *data)
97{
98 if (!wm8994->irq_base)
99 return -EINVAL;
100 return request_threaded_irq(wm8994->irq_base + irq, NULL, handler,
101 IRQF_TRIGGER_RISING, name,
102 data);
103}
104static inline void wm8994_free_irq(struct wm8994 *wm8994, int irq, void *data)
105{
106 if (!wm8994->irq_base)
107 return;
108 free_irq(wm8994->irq_base + irq, data);
109}
110
111int wm8994_irq_init(struct wm8994 *wm8994);
112void wm8994_irq_exit(struct wm8994 *wm8994);
113
114#endif