1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * linux/include/linux/mfd/aat2870.h
4 *
5 * Copyright (c) 2011, NVIDIA Corporation.
6 * Author: Jin Park <jinyoungp@nvidia.com>
7 */
8
9#ifndef __LINUX_MFD_AAT2870_H
10#define __LINUX_MFD_AAT2870_H
11
12#include <linux/debugfs.h>
13#include <linux/i2c.h>
14
15/* Register offsets */
16#define AAT2870_BL_CH_EN	0x00
17#define AAT2870_BLM		0x01
18#define AAT2870_BLS		0x02
19#define AAT2870_BL1		0x03
20#define AAT2870_BL2		0x04
21#define AAT2870_BL3		0x05
22#define AAT2870_BL4		0x06
23#define AAT2870_BL5		0x07
24#define AAT2870_BL6		0x08
25#define AAT2870_BL7		0x09
26#define AAT2870_BL8		0x0A
27#define AAT2870_FLR		0x0B
28#define AAT2870_FM		0x0C
29#define AAT2870_FS		0x0D
30#define AAT2870_ALS_CFG0	0x0E
31#define AAT2870_ALS_CFG1	0x0F
32#define AAT2870_ALS_CFG2	0x10
33#define AAT2870_AMB		0x11
34#define AAT2870_ALS0		0x12
35#define AAT2870_ALS1		0x13
36#define AAT2870_ALS2		0x14
37#define AAT2870_ALS3		0x15
38#define AAT2870_ALS4		0x16
39#define AAT2870_ALS5		0x17
40#define AAT2870_ALS6		0x18
41#define AAT2870_ALS7		0x19
42#define AAT2870_ALS8		0x1A
43#define AAT2870_ALS9		0x1B
44#define AAT2870_ALSA		0x1C
45#define AAT2870_ALSB		0x1D
46#define AAT2870_ALSC		0x1E
47#define AAT2870_ALSD		0x1F
48#define AAT2870_ALSE		0x20
49#define AAT2870_ALSF		0x21
50#define AAT2870_SUB_SET		0x22
51#define AAT2870_SUB_CTRL	0x23
52#define AAT2870_LDO_AB		0x24
53#define AAT2870_LDO_CD		0x25
54#define AAT2870_LDO_EN		0x26
55#define AAT2870_REG_NUM		0x27
56
57/* Device IDs */
58enum aat2870_id {
59	AAT2870_ID_BL,
60	AAT2870_ID_LDOA,
61	AAT2870_ID_LDOB,
62	AAT2870_ID_LDOC,
63	AAT2870_ID_LDOD
64};
65
66/* Backlight channels */
67#define AAT2870_BL_CH1		0x01
68#define AAT2870_BL_CH2		0x02
69#define AAT2870_BL_CH3		0x04
70#define AAT2870_BL_CH4		0x08
71#define AAT2870_BL_CH5		0x10
72#define AAT2870_BL_CH6		0x20
73#define AAT2870_BL_CH7		0x40
74#define AAT2870_BL_CH8		0x80
75#define AAT2870_BL_CH_ALL	0xFF
76
77/* Backlight current magnitude (mA) */
78enum aat2870_current {
79	AAT2870_CURRENT_0_45 = 1,
80	AAT2870_CURRENT_0_90,
81	AAT2870_CURRENT_1_80,
82	AAT2870_CURRENT_2_70,
83	AAT2870_CURRENT_3_60,
84	AAT2870_CURRENT_4_50,
85	AAT2870_CURRENT_5_40,
86	AAT2870_CURRENT_6_30,
87	AAT2870_CURRENT_7_20,
88	AAT2870_CURRENT_8_10,
89	AAT2870_CURRENT_9_00,
90	AAT2870_CURRENT_9_90,
91	AAT2870_CURRENT_10_8,
92	AAT2870_CURRENT_11_7,
93	AAT2870_CURRENT_12_6,
94	AAT2870_CURRENT_13_5,
95	AAT2870_CURRENT_14_4,
96	AAT2870_CURRENT_15_3,
97	AAT2870_CURRENT_16_2,
98	AAT2870_CURRENT_17_1,
99	AAT2870_CURRENT_18_0,
100	AAT2870_CURRENT_18_9,
101	AAT2870_CURRENT_19_8,
102	AAT2870_CURRENT_20_7,
103	AAT2870_CURRENT_21_6,
104	AAT2870_CURRENT_22_5,
105	AAT2870_CURRENT_23_4,
106	AAT2870_CURRENT_24_3,
107	AAT2870_CURRENT_25_2,
108	AAT2870_CURRENT_26_1,
109	AAT2870_CURRENT_27_0,
110	AAT2870_CURRENT_27_9
111};
112
113struct aat2870_register {
114	bool readable;
115	bool writeable;
116	u8 value;
117};
118
119struct aat2870_data {
120	struct device *dev;
121	struct i2c_client *client;
122
123	struct mutex io_lock;
124	struct aat2870_register *reg_cache; /* register cache */
125	int en_pin; /* enable GPIO pin (if < 0, ignore this value) */
126	bool is_enable;
127
128	/* init and uninit for platform specified */
129	int (*init)(struct aat2870_data *aat2870);
130	void (*uninit)(struct aat2870_data *aat2870);
131
132	/* i2c io funcntions */
133	int (*read)(struct aat2870_data *aat2870, u8 addr, u8 *val);
134	int (*write)(struct aat2870_data *aat2870, u8 addr, u8 val);
135	int (*update)(struct aat2870_data *aat2870, u8 addr, u8 mask, u8 val);
136
137	/* for debugfs */
138	struct dentry *dentry_root;
139};
140
141struct aat2870_subdev_info {
142	int id;
143	const char *name;
144	void *platform_data;
145};
146
147struct aat2870_platform_data {
148	int en_pin; /* enable GPIO pin (if < 0, ignore this value) */
149
150	struct aat2870_subdev_info *subdevs;
151	int num_subdevs;
152
153	/* init and uninit for platform specified */
154	int (*init)(struct aat2870_data *aat2870);
155	void (*uninit)(struct aat2870_data *aat2870);
156};
157
158struct aat2870_bl_platform_data {
159	/* backlight channels, default is AAT2870_BL_CH_ALL */
160	int channels;
161	/* backlight current magnitude, default is AAT2870_CURRENT_27_9 */
162	int max_current;
163	/* maximum brightness, default is 255 */
164	int max_brightness;
165};
166
167#endif /* __LINUX_MFD_AAT2870_H */
168