include/linux/led-lm3530.h

   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__ */