1/*
2 * linux/include/linux/mfd/aat2870.h
3 *
4 * Copyright (c) 2011, NVIDIA Corporation.
5 * Author: Jin Park <jinyoungp@nvidia.com>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * version 2 as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
19 * 02110-1301 USA
20 */
21
22#ifndef __LINUX_MFD_AAT2870_H
23#define __LINUX_MFD_AAT2870_H
24
25#include <linux/debugfs.h>
26#include <linux/i2c.h>
27
28/* Register offsets */
29#define AAT2870_BL_CH_EN	0x00
30#define AAT2870_BLM		0x01
31#define AAT2870_BLS		0x02
32#define AAT2870_BL1		0x03
33#define AAT2870_BL2		0x04
34#define AAT2870_BL3		0x05
35#define AAT2870_BL4		0x06
36#define AAT2870_BL5		0x07
37#define AAT2870_BL6		0x08
38#define AAT2870_BL7		0x09
39#define AAT2870_BL8		0x0A
40#define AAT2870_FLR		0x0B
41#define AAT2870_FM		0x0C
42#define AAT2870_FS		0x0D
43#define AAT2870_ALS_CFG0	0x0E
44#define AAT2870_ALS_CFG1	0x0F
45#define AAT2870_ALS_CFG2	0x10
46#define AAT2870_AMB		0x11
47#define AAT2870_ALS0		0x12
48#define AAT2870_ALS1		0x13
49#define AAT2870_ALS2		0x14
50#define AAT2870_ALS3		0x15
51#define AAT2870_ALS4		0x16
52#define AAT2870_ALS5		0x17
53#define AAT2870_ALS6		0x18
54#define AAT2870_ALS7		0x19
55#define AAT2870_ALS8		0x1A
56#define AAT2870_ALS9		0x1B
57#define AAT2870_ALSA		0x1C
58#define AAT2870_ALSB		0x1D
59#define AAT2870_ALSC		0x1E
60#define AAT2870_ALSD		0x1F
61#define AAT2870_ALSE		0x20
62#define AAT2870_ALSF		0x21
63#define AAT2870_SUB_SET		0x22
64#define AAT2870_SUB_CTRL	0x23
65#define AAT2870_LDO_AB		0x24
66#define AAT2870_LDO_CD		0x25
67#define AAT2870_LDO_EN		0x26
68#define AAT2870_REG_NUM		0x27
69
70/* Device IDs */
71enum aat2870_id {
72	AAT2870_ID_BL,
73	AAT2870_ID_LDOA,
74	AAT2870_ID_LDOB,
75	AAT2870_ID_LDOC,
76	AAT2870_ID_LDOD
77};
78
79/* Backlight channels */
80#define AAT2870_BL_CH1		0x01
81#define AAT2870_BL_CH2		0x02
82#define AAT2870_BL_CH3		0x04
83#define AAT2870_BL_CH4		0x08
84#define AAT2870_BL_CH5		0x10
85#define AAT2870_BL_CH6		0x20
86#define AAT2870_BL_CH7		0x40
87#define AAT2870_BL_CH8		0x80
88#define AAT2870_BL_CH_ALL	0xFF
89
90/* Backlight current magnitude (mA) */
91enum aat2870_current {
92	AAT2870_CURRENT_0_45 = 1,
93	AAT2870_CURRENT_0_90,
94	AAT2870_CURRENT_1_80,
95	AAT2870_CURRENT_2_70,
96	AAT2870_CURRENT_3_60,
97	AAT2870_CURRENT_4_50,
98	AAT2870_CURRENT_5_40,
99	AAT2870_CURRENT_6_30,
100	AAT2870_CURRENT_7_20,
101	AAT2870_CURRENT_8_10,
102	AAT2870_CURRENT_9_00,
103	AAT2870_CURRENT_9_90,
104	AAT2870_CURRENT_10_8,
105	AAT2870_CURRENT_11_7,
106	AAT2870_CURRENT_12_6,
107	AAT2870_CURRENT_13_5,
108	AAT2870_CURRENT_14_4,
109	AAT2870_CURRENT_15_3,
110	AAT2870_CURRENT_16_2,
111	AAT2870_CURRENT_17_1,
112	AAT2870_CURRENT_18_0,
113	AAT2870_CURRENT_18_9,
114	AAT2870_CURRENT_19_8,
115	AAT2870_CURRENT_20_7,
116	AAT2870_CURRENT_21_6,
117	AAT2870_CURRENT_22_5,
118	AAT2870_CURRENT_23_4,
119	AAT2870_CURRENT_24_3,
120	AAT2870_CURRENT_25_2,
121	AAT2870_CURRENT_26_1,
122	AAT2870_CURRENT_27_0,
123	AAT2870_CURRENT_27_9
124};
125
126struct aat2870_register {
127	bool readable;
128	bool writeable;
129	u8 value;
130};
131
132struct aat2870_data {
133	struct device *dev;
134	struct i2c_client *client;
135
136	struct mutex io_lock;
137	struct aat2870_register *reg_cache; /* register cache */
138	int en_pin; /* enable GPIO pin (if < 0, ignore this value) */
139	bool is_enable;
140
141	/* init and uninit for platform specified */
142	int (*init)(struct aat2870_data *aat2870);
143	void (*uninit)(struct aat2870_data *aat2870);
144
145	/* i2c io funcntions */
146	int (*read)(struct aat2870_data *aat2870, u8 addr, u8 *val);
147	int (*write)(struct aat2870_data *aat2870, u8 addr, u8 val);
148	int (*update)(struct aat2870_data *aat2870, u8 addr, u8 mask, u8 val);
149
150	/* for debugfs */
151	struct dentry *dentry_root;
152	struct dentry *dentry_reg;
153};
154
155struct aat2870_subdev_info {
156	int id;
157	const char *name;
158	void *platform_data;
159};
160
161struct aat2870_platform_data {
162	int en_pin; /* enable GPIO pin (if < 0, ignore this value) */
163
164	struct aat2870_subdev_info *subdevs;
165	int num_subdevs;
166
167	/* init and uninit for platform specified */
168	int (*init)(struct aat2870_data *aat2870);
169	void (*uninit)(struct aat2870_data *aat2870);
170};
171
172struct aat2870_bl_platform_data {
173	/* backlight channels, default is AAT2870_BL_CH_ALL */
174	int channels;
175	/* backlight current magnitude, default is AAT2870_CURRENT_27_9 */
176	int max_current;
177	/* maximum brightness, default is 255 */
178	int max_brightness;
179};
180
181#endif /* __LINUX_MFD_AAT2870_H */
182