linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * MFD core driver for Intel Cherrytrail Whiskey Cove PMIC

 *

 * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com>

 *

 * Based on various non upstream patches to support the CHT Whiskey Cove PMIC:

 * Copyright (C) 2013-2015 Intel Corporation. All rights reserved.

 */

​

#include <linux/acpi.h>

#include <linux/delay.h>

#include <linux/err.h>

#include <linux/i2c.h>

#include <linux/interrupt.h>

#include <linux/kernel.h>

#include <linux/mfd/core.h>

#include <linux/mfd/intel_soc_pmic.h>

#include <linux/regmap.h>

​

/* PMIC device registers */

#define REG_OFFSET_MASK     GENMASK(7, 0)

#define REG_ADDR_MASK       GENMASK(15, 8)

#define REG_ADDR_SHIFT      8

​

#define CHT_WC_IRQLVL1      0x6e02

#define CHT_WC_IRQLVL1_MASK 0x6e0e

​

/* Whiskey Cove PMIC share same ACPI ID between different platforms */

#define CHT_WC_HRV      3

​

/* Level 1 IRQs (level 2 IRQs are handled in the child device drivers) */

enum {

    CHT_WC_PWRSRC_IRQ = 0,

    CHT_WC_THRM_IRQ,

    CHT_WC_BCU_IRQ,

    CHT_WC_ADC_IRQ,

    CHT_WC_EXT_CHGR_IRQ,

    CHT_WC_GPIO_IRQ,

    /* There is no irq 6 */

    CHT_WC_CRIT_IRQ = 7,

};

​

static struct resource cht_wc_pwrsrc_resources[] = {

    DEFINE_RES_IRQ(CHT_WC_PWRSRC_IRQ),

};

​

static struct resource cht_wc_ext_charger_resources[] = {

    DEFINE_RES_IRQ(CHT_WC_EXT_CHGR_IRQ),

};

​

static struct mfd_cell cht_wc_dev[] = {

    {

        .name = "cht_wcove_pwrsrc",

        .num_resources = ARRAY_SIZE(cht_wc_pwrsrc_resources),

        .resources = cht_wc_pwrsrc_resources,

    }, {

        .name = "cht_wcove_ext_chgr",

        .num_resources = ARRAY_SIZE(cht_wc_ext_charger_resources),

        .resources = cht_wc_ext_charger_resources,

    },

    {   .name = "cht_wcove_region", },

};

​

/*

 * The CHT Whiskey Cove covers multiple I2C addresses, with a 1 Byte

 * register address space per I2C address, so we use 16 bit register

 * addresses where the high 8 bits contain the I2C client address.

 */

static int cht_wc_byte_reg_read(void *context, unsigned int reg,

                unsigned int *val)

{

    struct i2c_client *client = context;

    int ret, orig_addr = client->addr;

​

    if (!(reg & REG_ADDR_MASK)) {

        dev_err(&client->dev, "Error I2C address not specified\n");

        return -EINVAL;

    }

​

    client->addr = (reg & REG_ADDR_MASK) >> REG_ADDR_SHIFT;

    ret = i2c_smbus_read_byte_data(client, reg & REG_OFFSET_MASK);

    client->addr = orig_addr;

​

    if (ret < 0)

        return ret;

​

    *val = ret;

    return 0;

}

​

static int cht_wc_byte_reg_write(void *context, unsigned int reg,