// 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 struct resource da9063_regulators_resources[] = {
  	{
  		.name	= "LDO_LIM",
  		.start	= DA9063_IRQ_LDO_LIM,
  		.end	= DA9063_IRQ_LDO_LIM,
  		.flags	= IORESOURCE_IRQ,
  	},
  };
  
  static 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 struct resource da9063_onkey_resources[] = {
  	{

  		.name	= "ONKEY",

  		.start	= DA9063_IRQ_ONKEY,
  		.end	= DA9063_IRQ_ONKEY,
  		.flags	= IORESOURCE_IRQ,
  	},
  };
  
  static 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.
  ");
  		return -EIO;
  	}
  
  	if (fault_log) {
  		if (fault_log & DA9063_TWD_ERROR)
  			dev_dbg(da9063->dev,
  				"Fault log entry detected: DA9063_TWD_ERROR
  ");
  		if (fault_log & DA9063_POR)
  			dev_dbg(da9063->dev,
  				"Fault log entry detected: DA9063_POR
  ");
  		if (fault_log & DA9063_VDD_FAULT)
  			dev_dbg(da9063->dev,
  				"Fault log entry detected: DA9063_VDD_FAULT
  ");
  		if (fault_log & DA9063_VDD_START)
  			dev_dbg(da9063->dev,
  				"Fault log entry detected: DA9063_VDD_START
  ");
  		if (fault_log & DA9063_TEMP_CRIT)
  			dev_dbg(da9063->dev,
  				"Fault log entry detected: DA9063_TEMP_CRIT
  ");
  		if (fault_log & DA9063_KEY_RESET)
  			dev_dbg(da9063->dev,
  				"Fault log entry detected: DA9063_KEY_RESET
  ");
  		if (fault_log & DA9063_NSHUTDOWN)
  			dev_dbg(da9063->dev,
  				"Fault log entry detected: DA9063_NSHUTDOWN
  ");
  		if (fault_log & DA9063_WAIT_SHUT)
  			dev_dbg(da9063->dev,
  				"Fault log entry detected: DA9063_WAIT_SHUT
  ");
  	}
  
  	ret = regmap_write(da9063->regmap,
  			   DA9063_REG_FAULT_LOG,
  			   fault_log);
  	if (ret < 0)
  		dev_err(da9063->dev,
  			"Cannot reset FAULT_LOG values %d
  ", 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
  ");

  	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.
  ");
  		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
  ");
  		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
  ");
  			return ret;
  		}
  	}

  
  	return ret;
  }

  MODULE_DESCRIPTION("PMIC driver for Dialog DA9063");

  MODULE_AUTHOR("Krystian Garbaciak");
  MODULE_AUTHOR("Michal Hajduk");

  MODULE_LICENSE("GPL");