linux/include/linux/led-lm3530.h
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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
  61enum 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 */
  68enum 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 */
  76struct 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 */
  98struct 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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