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1 | /* |
2 | * Copyright (C) 2011 ST-Ericsson SA. |
3 | * Copyright (C) 2009 Motorola, Inc. |
4 | * |
5 | * License Terms: GNU General Public License v2 |
6 | * |
7 | * Simple driver for National Semiconductor LM35330 Backlight driver chip |
8 | * |
9 | * Author: Shreshtha Kumar SAHU <shreshthakumar.sahu@stericsson.com> |
10 | * based on leds-lm3530.c by Dan Murphy <D.Murphy@motorola.com> |
11 | */ |
12 | |
13 | #ifndef _LINUX_LED_LM3530_H__ |
14 | #define _LINUX_LED_LM3530_H__ |
15 | |
16 | #define LM3530_FS_CURR_5mA (0) /* Full Scale Current */ |
17 | #define LM3530_FS_CURR_8mA (1) |
18 | #define LM3530_FS_CURR_12mA (2) |
19 | #define LM3530_FS_CURR_15mA (3) |
20 | #define LM3530_FS_CURR_19mA (4) |
21 | #define LM3530_FS_CURR_22mA (5) |
22 | #define LM3530_FS_CURR_26mA (6) |
23 | #define LM3530_FS_CURR_29mA (7) |
24 | |
25 | #define LM3530_ALS_AVRG_TIME_32ms (0) /* ALS Averaging Time */ |
26 | #define LM3530_ALS_AVRG_TIME_64ms (1) |
27 | #define LM3530_ALS_AVRG_TIME_128ms (2) |
28 | #define LM3530_ALS_AVRG_TIME_256ms (3) |
29 | #define LM3530_ALS_AVRG_TIME_512ms (4) |
30 | #define LM3530_ALS_AVRG_TIME_1024ms (5) |
31 | #define LM3530_ALS_AVRG_TIME_2048ms (6) |
32 | #define LM3530_ALS_AVRG_TIME_4096ms (7) |
33 | |
34 | #define LM3530_RAMP_TIME_1ms (0) /* Brigtness Ramp Time */ |
35 | #define LM3530_RAMP_TIME_130ms (1) /* Max to 0 and vice versa */ |
36 | #define LM3530_RAMP_TIME_260ms (2) |
37 | #define LM3530_RAMP_TIME_520ms (3) |
38 | #define LM3530_RAMP_TIME_1s (4) |
39 | #define LM3530_RAMP_TIME_2s (5) |
40 | #define LM3530_RAMP_TIME_4s (6) |
41 | #define LM3530_RAMP_TIME_8s (7) |
42 | |
43 | /* ALS Resistor Select */ |
44 | #define LM3530_ALS_IMPD_Z (0x00) /* ALS Impedance */ |
45 | #define LM3530_ALS_IMPD_13_53kOhm (0x01) |
46 | #define LM3530_ALS_IMPD_9_01kOhm (0x02) |
47 | #define LM3530_ALS_IMPD_5_41kOhm (0x03) |
48 | #define LM3530_ALS_IMPD_2_27kOhm (0x04) |
49 | #define LM3530_ALS_IMPD_1_94kOhm (0x05) |
50 | #define LM3530_ALS_IMPD_1_81kOhm (0x06) |
51 | #define LM3530_ALS_IMPD_1_6kOhm (0x07) |
52 | #define LM3530_ALS_IMPD_1_138kOhm (0x08) |
53 | #define LM3530_ALS_IMPD_1_05kOhm (0x09) |
54 | #define LM3530_ALS_IMPD_1_011kOhm (0x0A) |
55 | #define LM3530_ALS_IMPD_941Ohm (0x0B) |
56 | #define LM3530_ALS_IMPD_759Ohm (0x0C) |
57 | #define LM3530_ALS_IMPD_719Ohm (0x0D) |
58 | #define LM3530_ALS_IMPD_700Ohm (0x0E) |
59 | #define LM3530_ALS_IMPD_667Ohm (0x0F) |
60 | |
61 | enum lm3530_mode { |
62 | LM3530_BL_MODE_MANUAL = 0, /* "man" */ |
63 | LM3530_BL_MODE_ALS, /* "als" */ |
64 | LM3530_BL_MODE_PWM, /* "pwm" */ |
65 | }; |
66 | |
67 | /* ALS input select */ |
68 | enum lm3530_als_mode { |
69 | LM3530_INPUT_AVRG = 0, /* ALS1 and ALS2 input average */ |
70 | LM3530_INPUT_ALS1, /* ALS1 Input */ |
71 | LM3530_INPUT_ALS2, /* ALS2 Input */ |
72 | LM3530_INPUT_CEIL, /* Max of ALS1 and ALS2 */ |
73 | }; |
74 | |
75 | /* PWM Platform Specific Data */ |
76 | struct lm3530_pwm_data { |
77 | void (*pwm_set_intensity) (int brightness, int max_brightness); |
78 | int (*pwm_get_intensity) (int max_brightness); |
79 | }; |
80 | |
81 | /** |
82 | * struct lm3530_platform_data |
83 | * @mode: mode of operation i.e. Manual, ALS or PWM |
84 | * @als_input_mode: select source of ALS input - ALS1/2 or average |
85 | * @max_current: full scale LED current |
86 | * @pwm_pol_hi: PWM input polarity - active high/active low |
87 | * @als_avrg_time: ALS input averaging time |
88 | * @brt_ramp_law: brightness mapping mode - exponential/linear |
89 | * @brt_ramp_fall: rate of fall of led current |
90 | * @brt_ramp_rise: rate of rise of led current |
91 | * @als1_resistor_sel: internal resistance from ALS1 input to ground |
92 | * @als2_resistor_sel: internal resistance from ALS2 input to ground |
93 | * @als_vmin: als input voltage calibrated for max brightness in mV |
94 | * @als_vmax: als input voltage calibrated for min brightness in mV |
95 | * @brt_val: brightness value (0-127) |
96 | * @pwm_data: PWM control functions (only valid when the mode is PWM) |
97 | */ |
98 | struct lm3530_platform_data { |
99 | enum lm3530_mode mode; |
100 | enum lm3530_als_mode als_input_mode; |
101 | |
102 | u8 max_current; |
103 | bool pwm_pol_hi; |
104 | u8 als_avrg_time; |
105 | |
106 | bool brt_ramp_law; |
107 | u8 brt_ramp_fall; |
108 | u8 brt_ramp_rise; |
109 | |
110 | u8 als1_resistor_sel; |
111 | u8 als2_resistor_sel; |
112 | |
113 | u32 als_vmin; |
114 | u32 als_vmax; |
115 | |
116 | u8 brt_val; |
117 | |
118 | struct lm3530_pwm_data pwm_data; |
119 | }; |
120 | |
121 | #endif /* _LINUX_LED_LM3530_H__ */ |
122 |
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