led-lm3530.h

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/*
 * Copyright (C) 2011 ST-Ericsson SA.
 * Copyright (C) 2009 Motorola, Inc.
 *
 * License Terms: GNU General Public License v2
 *
 * Simple driver for National Semiconductor LM35330 Backlight driver chip
 *
 * Author: Shreshtha Kumar SAHU <[email protected]>
 * based on leds-lm3530.c by Dan Murphy <[email protected]>
 */

#ifndef _LINUX_LED_LM3530_H__
#define _LINUX_LED_LM3530_H__

#define LM3530_FS_CURR_5mA      (0) /* Full Scale Current */
#define LM3530_FS_CURR_8mA      (1)
#define LM3530_FS_CURR_12mA     (2)
#define LM3530_FS_CURR_15mA     (3)
#define LM3530_FS_CURR_19mA     (4)
#define LM3530_FS_CURR_22mA     (5)
#define LM3530_FS_CURR_26mA     (6)
#define LM3530_FS_CURR_29mA     (7)

#define LM3530_ALS_AVRG_TIME_32ms   (0) /* ALS Averaging Time */
#define LM3530_ALS_AVRG_TIME_64ms   (1)
#define LM3530_ALS_AVRG_TIME_128ms  (2)
#define LM3530_ALS_AVRG_TIME_256ms  (3)
#define LM3530_ALS_AVRG_TIME_512ms  (4)
#define LM3530_ALS_AVRG_TIME_1024ms (5)
#define LM3530_ALS_AVRG_TIME_2048ms (6)
#define LM3530_ALS_AVRG_TIME_4096ms (7)

#define LM3530_RAMP_TIME_1ms        (0) /* Brigtness Ramp Time */
#define LM3530_RAMP_TIME_130ms      (1) /* Max to 0 and vice versa */
#define LM3530_RAMP_TIME_260ms      (2)
#define LM3530_RAMP_TIME_520ms      (3)
#define LM3530_RAMP_TIME_1s     (4)
#define LM3530_RAMP_TIME_2s     (5)
#define LM3530_RAMP_TIME_4s     (6)
#define LM3530_RAMP_TIME_8s     (7)

/* ALS Resistor Select */
#define LM3530_ALS_IMPD_Z       (0x00) /* ALS Impedance */
#define LM3530_ALS_IMPD_13_53kOhm   (0x01)
#define LM3530_ALS_IMPD_9_01kOhm    (0x02)
#define LM3530_ALS_IMPD_5_41kOhm    (0x03)
#define LM3530_ALS_IMPD_2_27kOhm    (0x04)
#define LM3530_ALS_IMPD_1_94kOhm    (0x05)
#define LM3530_ALS_IMPD_1_81kOhm    (0x06)
#define LM3530_ALS_IMPD_1_6kOhm     (0x07)
#define LM3530_ALS_IMPD_1_138kOhm   (0x08)
#define LM3530_ALS_IMPD_1_05kOhm    (0x09)
#define LM3530_ALS_IMPD_1_011kOhm   (0x0A)
#define LM3530_ALS_IMPD_941Ohm      (0x0B)
#define LM3530_ALS_IMPD_759Ohm      (0x0C)
#define LM3530_ALS_IMPD_719Ohm      (0x0D)
#define LM3530_ALS_IMPD_700Ohm      (0x0E)
#define LM3530_ALS_IMPD_667Ohm      (0x0F)

enum lm3530_mode {
    LM3530_BL_MODE_MANUAL = 0,  /* "man" */
    LM3530_BL_MODE_ALS,     /* "als" */
    LM3530_BL_MODE_PWM,     /* "pwm" */
};

/* ALS input select */
enum lm3530_als_mode {
    LM3530_INPUT_AVRG = 0,  /* ALS1 and ALS2 input average */
    LM3530_INPUT_ALS1,  /* ALS1 Input */
    LM3530_INPUT_ALS2,  /* ALS2 Input */
    LM3530_INPUT_CEIL,  /* Max of ALS1 and ALS2 */
};

/* PWM Platform Specific Data */
struct lm3530_pwm_data {
    void (*pwm_set_intensity) (int brightness, int max_brightness);
    int (*pwm_get_intensity) (int max_brightness);
};

struct lm3530_platform_data {
    enum lm3530_mode mode;
    enum lm3530_als_mode als_input_mode;

    u8 max_current;
    bool pwm_pol_hi;
    u8 als_avrg_time;

    bool brt_ramp_law;
    u8 brt_ramp_fall;
    u8 brt_ramp_rise;

    u8 als1_resistor_sel;
    u8 als2_resistor_sel;

    u32 als_vmin;
    u32 als_vmax;

    u8 brt_val;

    struct lm3530_pwm_data pwm_data;
};

#endif  /* _LINUX_LED_LM3530_H__ */