linux-imx

/*

 * leds-lm3533.c -- LM3533 LED driver

 *

 * Copyright (C) 2011-2012 Texas Instruments

 *

 * Author: Johan Hovold <jhovold@gmail.com>

 *

 * This program is free software; you can redistribute it and/or modify it

 * under  the terms of the GNU General  Public License as published by the

 * Free Software Foundation;  either version 2 of the License, or (at your

 * option) any later version.

 */

​

#include <linux/module.h>

#include <linux/leds.h>

#include <linux/mfd/core.h>

#include <linux/mutex.h>

#include <linux/platform_device.h>

#include <linux/slab.h>

​

#include <linux/mfd/lm3533.h>

​

​

#define LM3533_LVCTRLBANK_MIN       2

#define LM3533_LVCTRLBANK_MAX       5

#define LM3533_LVCTRLBANK_COUNT     4

#define LM3533_RISEFALLTIME_MAX     7

#define LM3533_ALS_CHANNEL_LV_MIN   1

#define LM3533_ALS_CHANNEL_LV_MAX   2

​

#define LM3533_REG_CTRLBANK_BCONF_BASE      0x1b

#define LM3533_REG_PATTERN_ENABLE       0x28

#define LM3533_REG_PATTERN_LOW_TIME_BASE    0x71

#define LM3533_REG_PATTERN_HIGH_TIME_BASE   0x72

#define LM3533_REG_PATTERN_RISETIME_BASE    0x74

#define LM3533_REG_PATTERN_FALLTIME_BASE    0x75

​

#define LM3533_REG_PATTERN_STEP         0x10

​

#define LM3533_REG_CTRLBANK_BCONF_MAPPING_MASK      0x04

#define LM3533_REG_CTRLBANK_BCONF_ALS_EN_MASK       0x02

#define LM3533_REG_CTRLBANK_BCONF_ALS_CHANNEL_MASK  0x01

​

#define LM3533_LED_FLAG_PATTERN_ENABLE      1

​

​

struct lm3533_led {

    struct lm3533 *lm3533;

    struct lm3533_ctrlbank cb;

    struct led_classdev cdev;

    int id;

​

    struct mutex mutex;

    unsigned long flags;

};

​

​

static inline struct lm3533_led *to_lm3533_led(struct led_classdev *cdev)

{

    return container_of(cdev, struct lm3533_led, cdev);

}

​

static inline int lm3533_led_get_ctrlbank_id(struct lm3533_led *led)

{

    return led->id + 2;

}

​

static inline u8 lm3533_led_get_lv_reg(struct lm3533_led *led, u8 base)

{

    return base + led->id;

}

​

static inline u8 lm3533_led_get_pattern(struct lm3533_led *led)

{

    return led->id;

}

​

static inline u8 lm3533_led_get_pattern_reg(struct lm3533_led *led,

                                u8 base)

{

    return base + lm3533_led_get_pattern(led) * LM3533_REG_PATTERN_STEP;

}

​

static int lm3533_led_pattern_enable(struct lm3533_led *led, int enable)

{

    u8 mask;

    u8 val;

    int pattern;

    int state;

    int ret = 0;

​

    dev_dbg(led->cdev.dev, "%s - %d\n", __func__, enable);