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