// SPDX-License-Identifier: GPL-2.0+
/*
 * Device access for Dialog DA9063 modules
 *
 * Copyright 2012 Dialog Semiconductors Ltd.
 * Copyright 2013 Philipp Zabel, Pengutronix
 *
 * Author: Krystian Garbaciak, Dialog Semiconductor
 * Author: Michal Hajduk, Dialog Semiconductor
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>
#include <linux/mfd/core.h>
#include <linux/regmap.h>

#include <linux/mfd/da9063/core.h>
#include <linux/mfd/da9063/registers.h>

#include <linux/proc_fs.h>
#include <linux/kthread.h>
#include <linux/uaccess.h>


static const struct resource da9063_regulators_resources[] = {
        {
                .name   = "LDO_LIM",
                .start  = DA9063_IRQ_LDO_LIM,
                .end    = DA9063_IRQ_LDO_LIM,
                .flags  = IORESOURCE_IRQ,
        },
};

static const struct resource da9063_rtc_resources[] = {
        {
                .name   = "ALARM",
                .start  = DA9063_IRQ_ALARM,
                .end    = DA9063_IRQ_ALARM,
                .flags  = IORESOURCE_IRQ,
        },
        {
                .name   = "TICK",
                .start  = DA9063_IRQ_TICK,
                .end    = DA9063_IRQ_TICK,
                .flags  = IORESOURCE_IRQ,
        }
};

static const struct resource da9063_onkey_resources[] = {
        {
                .name   = "ONKEY",
                .start  = DA9063_IRQ_ONKEY,
                .end    = DA9063_IRQ_ONKEY,
                .flags  = IORESOURCE_IRQ,
        },
};

static const struct resource da9063_hwmon_resources[] = {
        {
                .start  = DA9063_IRQ_ADC_RDY,
                .end    = DA9063_IRQ_ADC_RDY,
                .flags  = IORESOURCE_IRQ,
        },
};


static const struct mfd_cell da9063_common_devs[] = {
        {
                .name           = DA9063_DRVNAME_REGULATORS,
                .num_resources  = ARRAY_SIZE(da9063_regulators_resources),
                .resources      = da9063_regulators_resources,
        },
        {
                .name           = DA9063_DRVNAME_LEDS,
        },
        {
                .name           = DA9063_DRVNAME_WATCHDOG,
                .of_compatible  = "dlg,da9063-watchdog",
        },
        {
                .name           = DA9063_DRVNAME_HWMON,
                .num_resources  = ARRAY_SIZE(da9063_hwmon_resources),
                .resources      = da9063_hwmon_resources,
        },
        {
                .name           = DA9063_DRVNAME_ONKEY,
                .num_resources  = ARRAY_SIZE(da9063_onkey_resources),
                .resources      = da9063_onkey_resources,
                .of_compatible = "dlg,da9063-onkey",
        },
        {
                .name           = DA9063_DRVNAME_VIBRATION,
        },
};

/* Only present on DA9063 , not on DA9063L */
static const struct mfd_cell da9063_devs[] = {
        {
                .name           = DA9063_DRVNAME_RTC,
                .num_resources  = ARRAY_SIZE(da9063_rtc_resources),
                .resources      = da9063_rtc_resources,
                .of_compatible  = "dlg,da9063-rtc",
        },
};

static int da9063_clear_fault_log(struct da9063 *da9063)
{
        int ret = 0;
        int fault_log = 0;

        ret = regmap_read(da9063->regmap, DA9063_REG_FAULT_LOG, &fault_log);
        if (ret < 0) {
                dev_err(da9063->dev, "Cannot read FAULT_LOG.\n");
                return -EIO;
        }

        if (fault_log) {
                if (fault_log & DA9063_TWD_ERROR)
                        dev_dbg(da9063->dev,
                                "Fault log entry detected: DA9063_TWD_ERROR\n");
                if (fault_log & DA9063_POR)
                        dev_dbg(da9063->dev,
                                "Fault log entry detected: DA9063_POR\n");
                if (fault_log & DA9063_VDD_FAULT)
                        dev_dbg(da9063->dev,
                                "Fault log entry detected: DA9063_VDD_FAULT\n");
                if (fault_log & DA9063_VDD_START)
                        dev_dbg(da9063->dev,
                                "Fault log entry detected: DA9063_VDD_START\n");
                if (fault_log & DA9063_TEMP_CRIT)
                        dev_dbg(da9063->dev,
                                "Fault log entry detected: DA9063_TEMP_CRIT\n");
                if (fault_log & DA9063_KEY_RESET)
                        dev_dbg(da9063->dev,
                                "Fault log entry detected: DA9063_KEY_RESET\n");
                if (fault_log & DA9063_NSHUTDOWN)
                        dev_dbg(da9063->dev,
                                "Fault log entry detected: DA9063_NSHUTDOWN\n");
                if (fault_log & DA9063_WAIT_SHUT)
                        dev_dbg(da9063->dev,
                                "Fault log entry detected: DA9063_WAIT_SHUT\n");
        }

        ret = regmap_write(da9063->regmap,
                           DA9063_REG_FAULT_LOG,
                           fault_log);
        if (ret < 0)
                dev_err(da9063->dev,
                        "Cannot reset FAULT_LOG values %d\n", ret);

        return ret;
}

int da9063_device_init(struct da9063 *da9063, unsigned int irq)
{
        int ret;

        ret = da9063_clear_fault_log(da9063);
        if (ret < 0)
                dev_err(da9063->dev, "Cannot clear fault log\n");

        da9063->flags = 0;
        da9063->irq_base = -1;
        da9063->chip_irq = irq;

        ret = da9063_irq_init(da9063);
        if (ret) {
                dev_err(da9063->dev, "Cannot initialize interrupts.\n");
                return ret;
        }

        da9063->irq_base = regmap_irq_chip_get_base(da9063->regmap_irq);

        ret = devm_mfd_add_devices(da9063->dev, PLATFORM_DEVID_NONE,
                                   da9063_common_devs,
                                   ARRAY_SIZE(da9063_common_devs),
                                   NULL, da9063->irq_base, NULL);
        if (ret) {
                dev_err(da9063->dev, "Failed to add child devices\n");
                return ret;
        }

        if (da9063->type == PMIC_TYPE_DA9063) {
                ret = devm_mfd_add_devices(da9063->dev, PLATFORM_DEVID_NONE,
                                           da9063_devs, ARRAY_SIZE(da9063_devs),
                                           NULL, da9063->irq_base, NULL);
                if (ret) {
                        dev_err(da9063->dev, "Failed to add child devices\n");
                        return ret;
                }
        }

        return ret;
}

MODULE_DESCRIPTION("PMIC driver for Dialog DA9063");
MODULE_AUTHOR("Krystian Garbaciak");
MODULE_AUTHOR("Michal Hajduk");
MODULE_LICENSE("GPL");