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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
16c5c023 JH |
2 | /* |
3 | * lm3533-ctrlbank.c -- LM3533 Generic Control Bank interface | |
4 | * | |
5 | * Copyright (C) 2011-2012 Texas Instruments | |
6 | * | |
7 | * Author: Johan Hovold <jhovold@gmail.com> | |
16c5c023 JH |
8 | */ |
9 | ||
10 | #include <linux/device.h> | |
11 | #include <linux/module.h> | |
12 | ||
13 | #include <linux/mfd/lm3533.h> | |
14 | ||
15 | ||
6fa4b9d8 JH |
16 | #define LM3533_MAX_CURRENT_MIN 5000 |
17 | #define LM3533_MAX_CURRENT_MAX 29800 | |
18 | #define LM3533_MAX_CURRENT_STEP 800 | |
19 | ||
16c5c023 JH |
20 | #define LM3533_PWM_MAX 0x3f |
21 | ||
22 | #define LM3533_REG_PWM_BASE 0x14 | |
23 | #define LM3533_REG_MAX_CURRENT_BASE 0x1f | |
24 | #define LM3533_REG_CTRLBANK_ENABLE 0x27 | |
25 | #define LM3533_REG_BRIGHTNESS_BASE 0x40 | |
26 | ||
27 | ||
28 | static inline u8 lm3533_ctrlbank_get_reg(struct lm3533_ctrlbank *cb, u8 base) | |
29 | { | |
30 | return base + cb->id; | |
31 | } | |
32 | ||
33 | int lm3533_ctrlbank_enable(struct lm3533_ctrlbank *cb) | |
34 | { | |
35 | u8 mask; | |
36 | int ret; | |
37 | ||
38 | dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id); | |
39 | ||
40 | mask = 1 << cb->id; | |
41 | ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE, | |
42 | mask, mask); | |
43 | if (ret) | |
44 | dev_err(cb->dev, "failed to enable ctrlbank %d\n", cb->id); | |
45 | ||
46 | return ret; | |
47 | } | |
48 | EXPORT_SYMBOL_GPL(lm3533_ctrlbank_enable); | |
49 | ||
50 | int lm3533_ctrlbank_disable(struct lm3533_ctrlbank *cb) | |
51 | { | |
52 | u8 mask; | |
53 | int ret; | |
54 | ||
55 | dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id); | |
56 | ||
57 | mask = 1 << cb->id; | |
58 | ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE, 0, mask); | |
59 | if (ret) | |
60 | dev_err(cb->dev, "failed to disable ctrlbank %d\n", cb->id); | |
61 | ||
62 | return ret; | |
63 | } | |
64 | EXPORT_SYMBOL_GPL(lm3533_ctrlbank_disable); | |
65 | ||
6fa4b9d8 JH |
66 | /* |
67 | * Full-scale current. | |
68 | * | |
69 | * imax 5000 - 29800 uA (800 uA step) | |
70 | */ | |
71 | int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u16 imax) | |
72 | { | |
73 | u8 reg; | |
74 | u8 val; | |
75 | int ret; | |
76 | ||
77 | if (imax < LM3533_MAX_CURRENT_MIN || imax > LM3533_MAX_CURRENT_MAX) | |
78 | return -EINVAL; | |
79 | ||
80 | val = (imax - LM3533_MAX_CURRENT_MIN) / LM3533_MAX_CURRENT_STEP; | |
81 | ||
82 | reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_MAX_CURRENT_BASE); | |
83 | ret = lm3533_write(cb->lm3533, reg, val); | |
84 | if (ret) | |
85 | dev_err(cb->dev, "failed to set max current\n"); | |
86 | ||
87 | return ret; | |
88 | } | |
89 | EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_max_current); | |
90 | ||
4d3ec936 JH |
91 | int lm3533_ctrlbank_set_brightness(struct lm3533_ctrlbank *cb, u8 val) |
92 | { | |
93 | u8 reg; | |
94 | int ret; | |
95 | ||
96 | reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_BRIGHTNESS_BASE); | |
97 | ret = lm3533_write(cb->lm3533, reg, val); | |
98 | if (ret) | |
99 | dev_err(cb->dev, "failed to set brightness\n"); | |
100 | ||
101 | return ret; | |
102 | } | |
103 | EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_brightness); | |
104 | ||
105 | int lm3533_ctrlbank_get_brightness(struct lm3533_ctrlbank *cb, u8 *val) | |
106 | { | |
107 | u8 reg; | |
108 | int ret; | |
109 | ||
110 | reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_BRIGHTNESS_BASE); | |
111 | ret = lm3533_read(cb->lm3533, reg, val); | |
112 | if (ret) | |
113 | dev_err(cb->dev, "failed to get brightness\n"); | |
114 | ||
115 | return ret; | |
116 | } | |
117 | EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_brightness); | |
16c5c023 | 118 | |
16c5c023 JH |
119 | /* |
120 | * PWM-input control mask: | |
121 | * | |
122 | * bit 5 - PWM-input enabled in Zone 4 | |
123 | * bit 4 - PWM-input enabled in Zone 3 | |
124 | * bit 3 - PWM-input enabled in Zone 2 | |
125 | * bit 2 - PWM-input enabled in Zone 1 | |
126 | * bit 1 - PWM-input enabled in Zone 0 | |
127 | * bit 0 - PWM-input enabled | |
128 | */ | |
4d3ec936 JH |
129 | int lm3533_ctrlbank_set_pwm(struct lm3533_ctrlbank *cb, u8 val) |
130 | { | |
131 | u8 reg; | |
132 | int ret; | |
133 | ||
134 | if (val > LM3533_PWM_MAX) | |
135 | return -EINVAL; | |
136 | ||
137 | reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_PWM_BASE); | |
138 | ret = lm3533_write(cb->lm3533, reg, val); | |
139 | if (ret) | |
140 | dev_err(cb->dev, "failed to set PWM mask\n"); | |
141 | ||
142 | return ret; | |
143 | } | |
144 | EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_pwm); | |
145 | ||
146 | int lm3533_ctrlbank_get_pwm(struct lm3533_ctrlbank *cb, u8 *val) | |
147 | { | |
148 | u8 reg; | |
149 | int ret; | |
16c5c023 | 150 | |
4d3ec936 JH |
151 | reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_PWM_BASE); |
152 | ret = lm3533_read(cb->lm3533, reg, val); | |
153 | if (ret) | |
154 | dev_err(cb->dev, "failed to get PWM mask\n"); | |
155 | ||
156 | return ret; | |
157 | } | |
158 | EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_pwm); | |
16c5c023 JH |
159 | |
160 | MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>"); | |
161 | MODULE_DESCRIPTION("LM3533 Control Bank interface"); | |
162 | MODULE_LICENSE("GPL"); |