linux-imx

/*

 * Driver for TPS65218 Integrated power management chipsets

 *

 * Copyright (C) 2014 Texas Instruments Incorporated - http://www.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.

 *

 * This program is distributed "as is" WITHOUT ANY WARRANTY of any

 * kind, whether expressed or implied; without even the implied warranty

 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License version 2 for more details.

 */

​

#include <linux/kernel.h>

#include <linux/device.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/init.h>

#include <linux/i2c.h>

#include <linux/slab.h>

#include <linux/regmap.h>

#include <linux/err.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/irq.h>

#include <linux/interrupt.h>

#include <linux/mutex.h>

​

#include <linux/mfd/core.h>

#include <linux/mfd/tps65218.h>

​

#define TPS65218_PASSWORD_REGS_UNLOCK   0x7D

​

static const struct mfd_cell tps65218_cells[] = {

    {

        .name = "tps65218-pwrbutton",

        .of_compatible = "ti,tps65218-pwrbutton",

    },

    {

        .name = "tps65218-gpio",

        .of_compatible = "ti,tps65218-gpio",

    },

    { .name = "tps65218-regulator", },

};

​

/**

 * tps65218_reg_write: Write a single tps65218 register.

 *

 * @tps65218: Device to write to.

 * @reg: Register to write to.

 * @val: Value to write.

 * @level: Password protected level

 */

int tps65218_reg_write(struct tps65218 *tps, unsigned int reg,

            unsigned int val, unsigned int level)

{

    int ret;

    unsigned int xor_reg_val;

​

    switch (level) {

    case TPS65218_PROTECT_NONE: