1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* lm3533-ctrlbank.c -- LM3533 Generic Control Bank interface
*
* Copyright (C) 2011-2012 Texas Instruments
*
* Author: Johan Hovold <jhovold@gmail.com>
*/
#include <linux/device.h>
#include <linux/module.h>
#include <linux/mfd/lm3533.h>
#define LM3533_MAX_CURRENT_MIN 5000
#define LM3533_MAX_CURRENT_MAX 29800
#define LM3533_MAX_CURRENT_STEP 800
#define LM3533_PWM_MAX 0x3f
#define LM3533_REG_PWM_BASE 0x14
#define LM3533_REG_MAX_CURRENT_BASE 0x1f
#define LM3533_REG_CTRLBANK_ENABLE 0x27
#define LM3533_REG_BRIGHTNESS_BASE 0x40
static inline u8 lm3533_ctrlbank_get_reg(struct lm3533_ctrlbank *cb, u8 base)
{
return base + cb->id;
}
int lm3533_ctrlbank_enable(struct lm3533_ctrlbank *cb)
{
u8 mask;
int ret;
dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id);
mask = 1 << cb->id;
ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE,
mask, mask);
if (ret)
dev_err(cb->dev, "failed to enable ctrlbank %d\n", cb->id);
return ret;
}
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_enable);
int lm3533_ctrlbank_disable(struct lm3533_ctrlbank *cb)
{
u8 mask;
int ret;
dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id);
mask = 1 << cb->id;
ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE, 0, mask);
if (ret)
dev_err(cb->dev, "failed to disable ctrlbank %d\n", cb->id);
return ret;
}
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_disable);
/*
* Full-scale current.
*
* imax 5000 - 29800 uA (800 uA step)
*/
int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u16 imax)
{
u8 reg;
u8 val;
int ret;
if (imax < LM3533_MAX_CURRENT_MIN || imax > LM3533_MAX_CURRENT_MAX)
return -EINVAL;
val = (imax - LM3533_MAX_CURRENT_MIN) / LM3533_MAX_CURRENT_STEP;
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_MAX_CURRENT_BASE);
ret = lm3533_write(cb->lm3533, reg, val);
if (ret)
dev_err(cb->dev, "failed to set max current\n");
return ret;
}
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_max_current);
int lm3533_ctrlbank_set_brightness(struct lm3533_ctrlbank *cb, u8 val)
{
u8 reg;
int ret;
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_BRIGHTNESS_BASE);
ret = lm3533_write(cb->lm3533, reg, val);
if (ret)
dev_err(cb->dev, "failed to set brightness\n");
return ret;
}
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_brightness);
int lm3533_ctrlbank_get_brightness(struct lm3533_ctrlbank *cb, u8 *val)
{
u8 reg;
int ret;
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_BRIGHTNESS_BASE);
ret = lm3533_read(cb->lm3533, reg, val);
if (ret)
dev_err(cb->dev, "failed to get brightness\n");
return ret;
}
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_brightness);
/*
* PWM-input control mask:
*
* bit 5 - PWM-input enabled in Zone 4
* bit 4 - PWM-input enabled in Zone 3
* bit 3 - PWM-input enabled in Zone 2
* bit 2 - PWM-input enabled in Zone 1
* bit 1 - PWM-input enabled in Zone 0
* bit 0 - PWM-input enabled
*/
int lm3533_ctrlbank_set_pwm(struct lm3533_ctrlbank *cb, u8 val)
{
u8 reg;
int ret;
if (val > LM3533_PWM_MAX)
return -EINVAL;
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_PWM_BASE);
ret = lm3533_write(cb->lm3533, reg, val);
if (ret)
dev_err(cb->dev, "failed to set PWM mask\n");
return ret;
}
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_pwm);
int lm3533_ctrlbank_get_pwm(struct lm3533_ctrlbank *cb, u8 *val)
{
u8 reg;
int ret;
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_PWM_BASE);
ret = lm3533_read(cb->lm3533, reg, val);
if (ret)
dev_err(cb->dev, "failed to get PWM mask\n");
return ret;
}
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_pwm);
MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>");
MODULE_DESCRIPTION("LM3533 Control Bank interface");
MODULE_LICENSE("GPL");
|
