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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__ */ |