linux-imx

/*

 * TI LMU (Lighting Management Unit) Core Driver

 *

 * Copyright 2017 Texas Instruments

 *

 * Author: Milo Kim <milo.kim@ti.com>

 *

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

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */

​

#include <linux/delay.h>

#include <linux/err.h>

#include <linux/gpio/consumer.h>

#include <linux/i2c.h>

#include <linux/kernel.h>

#include <linux/mfd/core.h>

#include <linux/mfd/ti-lmu.h>

#include <linux/mfd/ti-lmu-register.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/slab.h>

​

struct ti_lmu_data {

    const struct mfd_cell *cells;

    int num_cells;

    unsigned int max_register;

};

​

static int ti_lmu_enable_hw(struct ti_lmu *lmu, enum ti_lmu_id id)

{

    if (lmu->en_gpio)

        gpiod_set_value(lmu->en_gpio, 1);

​

    /* Delay about 1ms after HW enable pin control */

    usleep_range(1000, 1500);

​

    /* LM3631 has additional power up sequence - enable LCD_EN bit. */

    if (id == LM3631) {

        return regmap_update_bits(lmu->regmap, LM3631_REG_DEVCTRL,

                      LM3631_LCD_EN_MASK,

                      LM3631_LCD_EN_MASK);

    }

​

    return 0;

}

​

static void ti_lmu_disable_hw(void *data)

{

    struct ti_lmu *lmu = data;

    if (lmu->en_gpio)

        gpiod_set_value(lmu->en_gpio, 0);

}

​

static const struct mfd_cell lm3532_devices[] = {

    {

        .name          = "ti-lmu-backlight",

        .id            = LM3532,

        .of_compatible = "ti,lm3532-backlight",

    },

};

​

#define LM363X_REGULATOR(_id)           \

{                       \

    .name          = "lm363x-regulator",    \

    .id            = _id,           \

    .of_compatible = "ti,lm363x-regulator", \

}                       \

​

static const struct mfd_cell lm3631_devices[] = {

    LM363X_REGULATOR(LM3631_BOOST),

    LM363X_REGULATOR(LM3631_LDO_CONT),

    LM363X_REGULATOR(LM3631_LDO_OREF),

    LM363X_REGULATOR(LM3631_LDO_POS),

    LM363X_REGULATOR(LM3631_LDO_NEG),

    {

        .name          = "ti-lmu-backlight",

        .id            = LM3631,

        .of_compatible = "ti,lm3631-backlight",

    },

};

​

static const struct mfd_cell lm3632_devices[] = {

    LM363X_REGULATOR(LM3632_BOOST),

    LM363X_REGULATOR(LM3632_LDO_POS),

    LM363X_REGULATOR(LM3632_LDO_NEG),

    {

        .name          = "ti-lmu-backlight",

        .id            = LM3632,

        .of_compatible = "ti,lm3632-backlight",