drivers/mfd/pm8018-core.c - kernel/msm - Gitiles

 /*
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
  * only version 2 as published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  */

 #define pr_fmt(fmt) "%s: " fmt, __func__

 #include <linux/kernel.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/err.h>
 #include <linux/msm_ssbi.h>
 #include <linux/mfd/core.h>
 #include <linux/mfd/pm8xxx/pm8018.h>
 #include <linux/mfd/pm8xxx/core.h>


 /* PMIC PM8018 SSBI Addresses */
 #define REG_HWREV		0x002  /* PMIC4 revision */
 #define REG_HWREV_2		0x0E8  /* PMIC4 revision 2 */

 #define REG_MPP_BASE		0x050

 #define REG_RTC_BASE		0x11D

 #define REG_TEMP_ALARM_CTRL	0x01B
 #define REG_TEMP_ALARM_PWM	0x09B


 #define PM8018_VERSION_MASK	0xFFF0
 #define PM8018_VERSION_VALUE	0x08F0
 #define PM8018_REVISION_MASK	0x000F

 #define REG_PM8018_PON_CNTRL_3	0x01D
 #define PM8018_RESTART_REASON_MASK	0x07

 #define SINGLE_IRQ_RESOURCE(_name, _irq) \
 { \
 	.name	= _name, \
 	.start	= _irq, \
 	.end	= _irq, \
 	.flags	= IORESOURCE_IRQ, \
 }

 struct pm8018 {
 	struct device			*dev;
 	struct pm_irq_chip		*irq_chip;
 	struct mfd_cell			*mfd_regulators;
 	u32				rev_registers;
 };

 static int pm8018_readb(const struct device *dev, u16 addr, u8 *val)
 {
 	const struct pm8xxx_drvdata *pm8018_drvdata = dev_get_drvdata(dev);
 	const struct pm8018 *pmic = pm8018_drvdata->pm_chip_data;

 	return msm_ssbi_read(pmic->dev->parent, addr, val, 1);
 }

 static int pm8018_writeb(const struct device *dev, u16 addr, u8 val)
 {
 	const struct pm8xxx_drvdata *pm8018_drvdata = dev_get_drvdata(dev);
 	const struct pm8018 *pmic = pm8018_drvdata->pm_chip_data;

 	return msm_ssbi_write(pmic->dev->parent, addr, &val, 1);
 }

 static int pm8018_read_buf(const struct device *dev, u16 addr, u8 *buf,
 									int cnt)
 {
 	const struct pm8xxx_drvdata *pm8018_drvdata = dev_get_drvdata(dev);
 	const struct pm8018 *pmic = pm8018_drvdata->pm_chip_data;

 	return msm_ssbi_read(pmic->dev->parent, addr, buf, cnt);
 }

 static int pm8018_write_buf(const struct device *dev, u16 addr, u8 *buf,
 									int cnt)
 {
 	const struct pm8xxx_drvdata *pm8018_drvdata = dev_get_drvdata(dev);
 	const struct pm8018 *pmic = pm8018_drvdata->pm_chip_data;

 	return msm_ssbi_write(pmic->dev->parent, addr, buf, cnt);
 }

 static int pm8018_read_irq_stat(const struct device *dev, int irq)
 {
 	const struct pm8xxx_drvdata *pm8018_drvdata = dev_get_drvdata(dev);
 	const struct pm8018 *pmic = pm8018_drvdata->pm_chip_data;

 	return pm8xxx_get_irq_stat(pmic->irq_chip, irq);
 }

 static enum pm8xxx_version pm8018_get_version(const struct device *dev)
 {
 	const struct pm8xxx_drvdata *pm8018_drvdata = dev_get_drvdata(dev);
 	const struct pm8018 *pmic = pm8018_drvdata->pm_chip_data;
 	enum pm8xxx_version version = -ENODEV;

 	if ((pmic->rev_registers & PM8018_VERSION_MASK) == PM8018_VERSION_VALUE)
 		version = PM8XXX_VERSION_8018;

 	return version;
 }

 static int pm8018_get_revision(const struct device *dev)
 {
 	const struct pm8xxx_drvdata *pm8018_drvdata = dev_get_drvdata(dev);
 	const struct pm8018 *pmic = pm8018_drvdata->pm_chip_data;

 	return pmic->rev_registers & PM8018_REVISION_MASK;
 }

 static struct pm8xxx_drvdata pm8018_drvdata = {
 	.pmic_readb		= pm8018_readb,
 	.pmic_writeb		= pm8018_writeb,
 	.pmic_read_buf		= pm8018_read_buf,
 	.pmic_write_buf		= pm8018_write_buf,
 	.pmic_read_irq_stat	= pm8018_read_irq_stat,
 	.pmic_get_version	= pm8018_get_version,
 	.pmic_get_revision	= pm8018_get_revision,
 };

 static const struct resource gpio_cell_resources[] __devinitconst = {
 	[0] = {
 		.start = PM8018_IRQ_BLOCK_BIT(PM8018_GPIO_BLOCK_START, 0),
 		.end   = PM8018_IRQ_BLOCK_BIT(PM8018_GPIO_BLOCK_START, 0)
 			+ PM8018_NR_GPIOS - 1,
 		.flags = IORESOURCE_IRQ,
 	},
 };

 static struct mfd_cell gpio_cell __devinitdata = {
 	.name		= PM8XXX_GPIO_DEV_NAME,
 	.id		= -1,
 	.resources	= gpio_cell_resources,
 	.num_resources	= ARRAY_SIZE(gpio_cell_resources),
 };

 static const struct resource mpp_cell_resources[] __devinitconst = {
 	{
 		.start	= PM8018_IRQ_BLOCK_BIT(PM8018_MPP_BLOCK_START, 0),
 		.end	= PM8018_IRQ_BLOCK_BIT(PM8018_MPP_BLOCK_START, 0)
 			  + PM8018_NR_MPPS - 1,
 		.flags	= IORESOURCE_IRQ,
 	},
 };

 static struct mfd_cell mpp_cell __devinitdata = {
 	.name		= PM8XXX_MPP_DEV_NAME,
 	.id		= -1,
 	.resources	= mpp_cell_resources,
 	.num_resources	= ARRAY_SIZE(mpp_cell_resources),
 };

 static const struct resource rtc_cell_resources[] __devinitconst = {
 	[0] = SINGLE_IRQ_RESOURCE(NULL, PM8018_RTC_ALARM_IRQ),
 	[1] = {
 		.name   = "pmic_rtc_base",
 		.start  = REG_RTC_BASE,
 		.end    = REG_RTC_BASE,
 		.flags  = IORESOURCE_IO,
 	},
 };

 static struct mfd_cell rtc_cell __devinitdata = {
 	.name           = PM8XXX_RTC_DEV_NAME,
 	.id             = -1,
 	.resources      = rtc_cell_resources,
 	.num_resources  = ARRAY_SIZE(rtc_cell_resources),
 };

 static const struct resource resources_pwrkey[] __devinitconst = {
 	SINGLE_IRQ_RESOURCE(NULL, PM8018_PWRKEY_REL_IRQ),
 	SINGLE_IRQ_RESOURCE(NULL, PM8018_PWRKEY_PRESS_IRQ),
 };

 static struct mfd_cell pwrkey_cell __devinitdata = {
 	.name		= PM8XXX_PWRKEY_DEV_NAME,
 	.id		= -1,
 	.num_resources	= ARRAY_SIZE(resources_pwrkey),
 	.resources	= resources_pwrkey,
 };

 static struct mfd_cell misc_cell __devinitdata = {
 	.name           = PM8XXX_MISC_DEV_NAME,
 	.id             = -1,
 };

 static struct mfd_cell debugfs_cell __devinitdata = {
 	.name		= "pm8xxx-debug",
 	.id		= -1,
 	.platform_data	= "pm8018-dbg",
 	.pdata_size	= sizeof("pm8018-dbg"),
 };

 static int __devinit
 pm8018_add_subdevices(const struct pm8018_platform_data *pdata,
 		      struct pm8018 *pmic)
 {
 	int ret = 0, irq_base = 0;
 	struct pm_irq_chip *irq_chip;
 	static struct mfd_cell *mfd_regulators;
 	int i;

 	if (pdata->irq_pdata) {
 		pdata->irq_pdata->irq_cdata.nirqs = PM8018_NR_IRQS;
 		irq_base = pdata->irq_pdata->irq_base;
 		irq_chip = pm8xxx_irq_init(pmic->dev, pdata->irq_pdata);

 		if (IS_ERR(irq_chip)) {
 			pr_err("Failed to init interrupts ret=%ld\n",
 					PTR_ERR(irq_chip));
 			return PTR_ERR(irq_chip);
 		}
 		pmic->irq_chip = irq_chip;
 	}

 	if (pdata->gpio_pdata) {
 		pdata->gpio_pdata->gpio_cdata.ngpios = PM8018_NR_GPIOS;
 		gpio_cell.platform_data = pdata->gpio_pdata;
 		gpio_cell.pdata_size = sizeof(struct pm8xxx_gpio_platform_data);
 		ret = mfd_add_devices(pmic->dev, 0, &gpio_cell, 1,
 					NULL, irq_base);
 		if (ret) {
 			pr_err("Failed to add  gpio subdevice ret=%d\n", ret);
 			goto bail;
 		}
 	}

 	if (pdata->mpp_pdata) {
 		pdata->mpp_pdata->core_data.nmpps = PM8018_NR_MPPS;
 		pdata->mpp_pdata->core_data.base_addr = REG_MPP_BASE;
 		mpp_cell.platform_data = pdata->mpp_pdata;
 		mpp_cell.pdata_size = sizeof(struct pm8xxx_mpp_platform_data);
 		ret = mfd_add_devices(pmic->dev, 0, &mpp_cell, 1, NULL,
 					irq_base);
 		if (ret) {
 			pr_err("Failed to add mpp subdevice ret=%d\n", ret);
 			goto bail;
 		}
 	}

 	if (pdata->rtc_pdata) {
 		rtc_cell.platform_data = pdata->rtc_pdata;
 		rtc_cell.pdata_size = sizeof(struct pm8xxx_rtc_platform_data);
 		ret = mfd_add_devices(pmic->dev, 0, &rtc_cell, 1, NULL,
 				irq_base);
 		if (ret) {
 			pr_err("Failed to add rtc subdevice ret=%d\n", ret);
 			goto bail;
 		}
 	}

 	if (pdata->pwrkey_pdata) {
 		pwrkey_cell.platform_data = pdata->pwrkey_pdata;
 		pwrkey_cell.pdata_size =
 			sizeof(struct pm8xxx_pwrkey_platform_data);
 		ret = mfd_add_devices(pmic->dev, 0, &pwrkey_cell, 1, NULL,
 					irq_base);
 		if (ret) {
 			pr_err("Failed to add pwrkey subdevice ret=%d\n", ret);
 			goto bail;
 		}
 	}

 	if (pdata->misc_pdata) {
 		misc_cell.platform_data = pdata->misc_pdata;
 		misc_cell.pdata_size = sizeof(struct pm8xxx_misc_platform_data);
 		ret = mfd_add_devices(pmic->dev, 0, &misc_cell, 1, NULL,
 				      irq_base);
 		if (ret) {
 			pr_err("Failed to add  misc subdevice ret=%d\n", ret);
 			goto bail;
 		}
 	}

 	ret = mfd_add_devices(pmic->dev, 0, &debugfs_cell, 1, NULL, irq_base);
 	if (ret) {
 		pr_err("Failed to add debugfs subdevice ret=%d\n", ret);
 		goto bail;
 	}

 	/* Add one device for each regulator used by the board. */
 	if (pdata->num_regulators > 0 && pdata->regulator_pdatas) {
 		mfd_regulators = kzalloc(sizeof(struct mfd_cell)
 					 * (pdata->num_regulators), GFP_KERNEL);
 		if (!mfd_regulators) {
 			pr_err("Cannot allocate %d bytes for pm8018 regulator "
 				"mfd cells\n", sizeof(struct mfd_cell)
 						* (pdata->num_regulators));
 			ret = -ENOMEM;
 			goto bail;
 		}
 		for (i = 0; i < pdata->num_regulators; i++) {
 			mfd_regulators[i].name = PM8018_REGULATOR_DEV_NAME;
 			mfd_regulators[i].id = pdata->regulator_pdatas[i].id;
 			mfd_regulators[i].platform_data =
 				&(pdata->regulator_pdatas[i]);
 			mfd_regulators[i].pdata_size =
 				sizeof(struct pm8018_regulator_platform_data);
 		}
 		ret = mfd_add_devices(pmic->dev, 0, mfd_regulators,
 				pdata->num_regulators, NULL, irq_base);
 		if (ret) {
 			pr_err("Failed to add regulator subdevices ret=%d\n",
 				ret);
 			kfree(mfd_regulators);
 			goto bail;
 		}
 		pmic->mfd_regulators = mfd_regulators;
 	}

 	return 0;
 bail:
 	if (pmic->irq_chip) {
 		pm8xxx_irq_exit(pmic->irq_chip);
 		pmic->irq_chip = NULL;
 	}
 	return ret;
 }

 static const char * const pm8018_restart_reason[] = {
 	[0] = "Unknown",
 	[1] = "Triggered from CBL (external charger)",
 	[2] = "Triggered from KPD (power key press)",
 	[3] = "Triggered from CHG (usb charger insertion)",
 	[4] = "Triggered from SMPL (sudden momentary power loss)",
 	[5] = "Triggered from RTC (real time clock)",
 	[6] = "Triggered by Hard Reset",
 	[7] = "Triggered by General Purpose Trigger",
 };

 static const char * const pm8018_rev_names[] = {
 	[PM8XXX_REVISION_8018_TEST]	= "test",
 	[PM8XXX_REVISION_8018_1p0]	= "1.0",
 	[PM8XXX_REVISION_8018_1p1]	= "1.1",
 	[PM8XXX_REVISION_8018_2p0]	= "2.0",
 };

 static int __devinit pm8018_probe(struct platform_device *pdev)
 {
 	const struct pm8018_platform_data *pdata = pdev->dev.platform_data;
 	const char *revision_name = "unknown";
 	struct pm8018 *pmic;
 	enum pm8xxx_version version;
 	int revision;
 	int rc;
 	u8 val;

 	if (!pdata) {
 		pr_err("missing platform data\n");
 		return -EINVAL;
 	}

 	pmic = kzalloc(sizeof(struct pm8018), GFP_KERNEL);
 	if (!pmic) {
 		pr_err("Cannot alloc pm8018 struct\n");
 		return -ENOMEM;
 	}

 	/* Read PMIC chip revision */
 	rc = msm_ssbi_read(pdev->dev.parent, REG_HWREV, &val, sizeof(val));
 	if (rc) {
 		pr_err("Failed to read hw rev 1 reg %d:rc=%d\n", REG_HWREV, rc);
 		goto err_read_rev;
 	}
 	pr_info("PMIC revision 1: %02X\n", val);
 	pmic->rev_registers = val;

 	/* Read PMIC chip revision 2 */
 	rc = msm_ssbi_read(pdev->dev.parent, REG_HWREV_2, &val, sizeof(val));
 	if (rc) {
 		pr_err("Failed to read hw rev 2 reg %d:rc=%d\n", REG_HWREV_2,
 			rc);
 		goto err_read_rev;
 	}
 	pr_info("PMIC revision 2: %02X\n", val);
 	pmic->rev_registers |= val << BITS_PER_BYTE;

 	pmic->dev = &pdev->dev;
 	pm8018_drvdata.pm_chip_data = pmic;
 	platform_set_drvdata(pdev, &pm8018_drvdata);

 	/* Print out human readable version and revision names. */
 	version = pm8xxx_get_version(pmic->dev);
 	if (version == PM8XXX_VERSION_8018) {
 		revision = pm8xxx_get_revision(pmic->dev);
 		if (revision >= 0 && revision < ARRAY_SIZE(pm8018_rev_names))
 			revision_name = pm8018_rev_names[revision];
 		pr_info("PMIC version: PM8018 rev %s\n", revision_name);
 	} else {
 		WARN_ON(version != PM8XXX_VERSION_8018);
 	}
 	/* Log human readable restart reason */
 	rc = msm_ssbi_read(pdev->dev.parent, REG_PM8018_PON_CNTRL_3, &val, 1);
 	if (rc) {
 		pr_err("Cannot read restart reason rc=%d\n", rc);
 		goto err_read_rev;
 	}
 	val &= PM8018_RESTART_REASON_MASK;
 	pr_info("PMIC Restart Reason: %s\n", pm8018_restart_reason[val]);

 	rc = pm8018_add_subdevices(pdata, pmic);
 	if (rc) {
 		pr_err("Cannot add subdevices rc=%d\n", rc);
 		goto err;
 	}

 	/* gpio might not work if no irq device is found */
 	WARN_ON(pmic->irq_chip == NULL);

 	return 0;

 err:
 	mfd_remove_devices(pmic->dev);
 	platform_set_drvdata(pdev, NULL);
 err_read_rev:
 	kfree(pmic);
 	return rc;
 }

 static int __devexit pm8018_remove(struct platform_device *pdev)
 {
 	struct pm8xxx_drvdata *drvdata;
 	struct pm8018 *pmic = NULL;

 	drvdata = platform_get_drvdata(pdev);
 	if (drvdata)
 		pmic = drvdata->pm_chip_data;
 	if (pmic)
 		mfd_remove_devices(pmic->dev);
 	if (pmic->irq_chip) {
 		pm8xxx_irq_exit(pmic->irq_chip);
 		pmic->irq_chip = NULL;
 	}
 	platform_set_drvdata(pdev, NULL);
 	kfree(pmic->mfd_regulators);
 	kfree(pmic);

 	return 0;
 }

 static struct platform_driver pm8018_driver = {
 	.probe		= pm8018_probe,
 	.remove		= __devexit_p(pm8018_remove),
 	.driver		= {
 		.name	= PM8018_CORE_DEV_NAME,
 		.owner	= THIS_MODULE,
 	},
 };

 static int __init pm8018_init(void)
 {
 	return platform_driver_register(&pm8018_driver);
 }
 postcore_initcall(pm8018_init);

 static void __exit pm8018_exit(void)
 {
 	platform_driver_unregister(&pm8018_driver);
 }
 module_exit(pm8018_exit);

 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("PMIC 8018 core driver");
 MODULE_VERSION("1.0");
 MODULE_ALIAS("platform:" PM8018_CORE_DEV_NAME);
	/*
	* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 and
	* only version 2 as published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*/

	#define pr_fmt(fmt) "%s: " fmt, __func__

	#include <linux/kernel.h>
	#include <linux/platform_device.h>
	#include <linux/slab.h>
	#include <linux/err.h>
	#include <linux/msm_ssbi.h>
	#include <linux/mfd/core.h>
	#include <linux/mfd/pm8xxx/pm8018.h>
	#include <linux/mfd/pm8xxx/core.h>


	/* PMIC PM8018 SSBI Addresses */
	#define REG_HWREV 0x002 /* PMIC4 revision */
	#define REG_HWREV_2 0x0E8 /* PMIC4 revision 2 */

	#define REG_MPP_BASE 0x050

	#define REG_RTC_BASE 0x11D

	#define REG_TEMP_ALARM_CTRL 0x01B
	#define REG_TEMP_ALARM_PWM 0x09B


	#define PM8018_VERSION_MASK 0xFFF0
	#define PM8018_VERSION_VALUE 0x08F0
	#define PM8018_REVISION_MASK 0x000F

	#define REG_PM8018_PON_CNTRL_3 0x01D
	#define PM8018_RESTART_REASON_MASK 0x07

	#define SINGLE_IRQ_RESOURCE(_name, _irq) \
	{ \
	.name = _name, \
	.start = _irq, \
	.end = _irq, \
	.flags = IORESOURCE_IRQ, \
	}

	struct pm8018 {
	struct device *dev;
	struct pm_irq_chip *irq_chip;
	struct mfd_cell *mfd_regulators;
	u32 rev_registers;
	};

	static int pm8018_readb(const struct device dev, u16 addr, u8 val)
	{
	const struct pm8xxx_drvdata *pm8018_drvdata = dev_get_drvdata(dev);
	const struct pm8018 *pmic = pm8018_drvdata->pm_chip_data;

	return msm_ssbi_read(pmic->dev->parent, addr, val, 1);
	}

	static int pm8018_writeb(const struct device *dev, u16 addr, u8 val)
	{
	const struct pm8xxx_drvdata *pm8018_drvdata = dev_get_drvdata(dev);
	const struct pm8018 *pmic = pm8018_drvdata->pm_chip_data;

	return msm_ssbi_write(pmic->dev->parent, addr, &val, 1);
	}

	static int pm8018_read_buf(const struct device dev, u16 addr, u8 buf,
	int cnt)
	{
	const struct pm8xxx_drvdata *pm8018_drvdata = dev_get_drvdata(dev);
	const struct pm8018 *pmic = pm8018_drvdata->pm_chip_data;

	return msm_ssbi_read(pmic->dev->parent, addr, buf, cnt);
	}

	static int pm8018_write_buf(const struct device dev, u16 addr, u8 buf,
	int cnt)
	{
	const struct pm8xxx_drvdata *pm8018_drvdata = dev_get_drvdata(dev);
	const struct pm8018 *pmic = pm8018_drvdata->pm_chip_data;

	return msm_ssbi_write(pmic->dev->parent, addr, buf, cnt);
	}

	static int pm8018_read_irq_stat(const struct device *dev, int irq)
	{
	const struct pm8xxx_drvdata *pm8018_drvdata = dev_get_drvdata(dev);
	const struct pm8018 *pmic = pm8018_drvdata->pm_chip_data;

	return pm8xxx_get_irq_stat(pmic->irq_chip, irq);
	}

	static enum pm8xxx_version pm8018_get_version(const struct device *dev)
	{
	const struct pm8xxx_drvdata *pm8018_drvdata = dev_get_drvdata(dev);
	const struct pm8018 *pmic = pm8018_drvdata->pm_chip_data;
	enum pm8xxx_version version = -ENODEV;

	if ((pmic->rev_registers & PM8018_VERSION_MASK) == PM8018_VERSION_VALUE)
	version = PM8XXX_VERSION_8018;

	return version;
	}

	static int pm8018_get_revision(const struct device *dev)
	{
	const struct pm8xxx_drvdata *pm8018_drvdata = dev_get_drvdata(dev);
	const struct pm8018 *pmic = pm8018_drvdata->pm_chip_data;

	return pmic->rev_registers & PM8018_REVISION_MASK;
	}

	static struct pm8xxx_drvdata pm8018_drvdata = {
	.pmic_readb = pm8018_readb,
	.pmic_writeb = pm8018_writeb,
	.pmic_read_buf = pm8018_read_buf,
	.pmic_write_buf = pm8018_write_buf,
	.pmic_read_irq_stat = pm8018_read_irq_stat,
	.pmic_get_version = pm8018_get_version,
	.pmic_get_revision = pm8018_get_revision,
	};

	static const struct resource gpio_cell_resources[] __devinitconst = {
	[0] = {
	.start = PM8018_IRQ_BLOCK_BIT(PM8018_GPIO_BLOCK_START, 0),
	.end = PM8018_IRQ_BLOCK_BIT(PM8018_GPIO_BLOCK_START, 0)
	+ PM8018_NR_GPIOS - 1,
	.flags = IORESOURCE_IRQ,
	},
	};

	static struct mfd_cell gpio_cell __devinitdata = {
	.name = PM8XXX_GPIO_DEV_NAME,
	.id = -1,
	.resources = gpio_cell_resources,
	.num_resources = ARRAY_SIZE(gpio_cell_resources),
	};

	static const struct resource mpp_cell_resources[] __devinitconst = {
	{
	.start = PM8018_IRQ_BLOCK_BIT(PM8018_MPP_BLOCK_START, 0),
	.end = PM8018_IRQ_BLOCK_BIT(PM8018_MPP_BLOCK_START, 0)
	+ PM8018_NR_MPPS - 1,
	.flags = IORESOURCE_IRQ,
	},
	};

	static struct mfd_cell mpp_cell __devinitdata = {
	.name = PM8XXX_MPP_DEV_NAME,
	.id = -1,
	.resources = mpp_cell_resources,
	.num_resources = ARRAY_SIZE(mpp_cell_resources),
	};

	static const struct resource rtc_cell_resources[] __devinitconst = {
	[0] = SINGLE_IRQ_RESOURCE(NULL, PM8018_RTC_ALARM_IRQ),
	[1] = {
	.name = "pmic_rtc_base",
	.start = REG_RTC_BASE,
	.end = REG_RTC_BASE,
	.flags = IORESOURCE_IO,
	},
	};

	static struct mfd_cell rtc_cell __devinitdata = {
	.name = PM8XXX_RTC_DEV_NAME,
	.id = -1,
	.resources = rtc_cell_resources,
	.num_resources = ARRAY_SIZE(rtc_cell_resources),
	};

	static const struct resource resources_pwrkey[] __devinitconst = {
	SINGLE_IRQ_RESOURCE(NULL, PM8018_PWRKEY_REL_IRQ),
	SINGLE_IRQ_RESOURCE(NULL, PM8018_PWRKEY_PRESS_IRQ),
	};

	static struct mfd_cell pwrkey_cell __devinitdata = {
	.name = PM8XXX_PWRKEY_DEV_NAME,
	.id = -1,
	.num_resources = ARRAY_SIZE(resources_pwrkey),
	.resources = resources_pwrkey,
	};

	static struct mfd_cell misc_cell __devinitdata = {
	.name = PM8XXX_MISC_DEV_NAME,
	.id = -1,
	};

	static struct mfd_cell debugfs_cell __devinitdata = {
	.name = "pm8xxx-debug",
	.id = -1,
	.platform_data = "pm8018-dbg",
	.pdata_size = sizeof("pm8018-dbg"),
	};

	static int __devinit
	pm8018_add_subdevices(const struct pm8018_platform_data *pdata,
	struct pm8018 *pmic)
	{
	int ret = 0, irq_base = 0;
	struct pm_irq_chip *irq_chip;
	static struct mfd_cell *mfd_regulators;
	int i;

	if (pdata->irq_pdata) {
	pdata->irq_pdata->irq_cdata.nirqs = PM8018_NR_IRQS;
	irq_base = pdata->irq_pdata->irq_base;
	irq_chip = pm8xxx_irq_init(pmic->dev, pdata->irq_pdata);

	if (IS_ERR(irq_chip)) {
	pr_err("Failed to init interrupts ret=%ld\n",
	PTR_ERR(irq_chip));
	return PTR_ERR(irq_chip);
	}
	pmic->irq_chip = irq_chip;
	}

	if (pdata->gpio_pdata) {
	pdata->gpio_pdata->gpio_cdata.ngpios = PM8018_NR_GPIOS;
	gpio_cell.platform_data = pdata->gpio_pdata;
	gpio_cell.pdata_size = sizeof(struct pm8xxx_gpio_platform_data);
	ret = mfd_add_devices(pmic->dev, 0, &gpio_cell, 1,
	NULL, irq_base);
	if (ret) {
	pr_err("Failed to add gpio subdevice ret=%d\n", ret);
	goto bail;
	}
	}

	if (pdata->mpp_pdata) {
	pdata->mpp_pdata->core_data.nmpps = PM8018_NR_MPPS;
	pdata->mpp_pdata->core_data.base_addr = REG_MPP_BASE;
	mpp_cell.platform_data = pdata->mpp_pdata;
	mpp_cell.pdata_size = sizeof(struct pm8xxx_mpp_platform_data);
	ret = mfd_add_devices(pmic->dev, 0, &mpp_cell, 1, NULL,
	irq_base);
	if (ret) {
	pr_err("Failed to add mpp subdevice ret=%d\n", ret);
	goto bail;
	}
	}

	if (pdata->rtc_pdata) {
	rtc_cell.platform_data = pdata->rtc_pdata;
	rtc_cell.pdata_size = sizeof(struct pm8xxx_rtc_platform_data);
	ret = mfd_add_devices(pmic->dev, 0, &rtc_cell, 1, NULL,
	irq_base);
	if (ret) {
	pr_err("Failed to add rtc subdevice ret=%d\n", ret);
	goto bail;
	}
	}

	if (pdata->pwrkey_pdata) {
	pwrkey_cell.platform_data = pdata->pwrkey_pdata;
	pwrkey_cell.pdata_size =
	sizeof(struct pm8xxx_pwrkey_platform_data);
	ret = mfd_add_devices(pmic->dev, 0, &pwrkey_cell, 1, NULL,
	irq_base);
	if (ret) {
	pr_err("Failed to add pwrkey subdevice ret=%d\n", ret);
	goto bail;
	}
	}

	if (pdata->misc_pdata) {
	misc_cell.platform_data = pdata->misc_pdata;
	misc_cell.pdata_size = sizeof(struct pm8xxx_misc_platform_data);
	ret = mfd_add_devices(pmic->dev, 0, &misc_cell, 1, NULL,
	irq_base);
	if (ret) {
	pr_err("Failed to add misc subdevice ret=%d\n", ret);
	goto bail;
	}
	}

	ret = mfd_add_devices(pmic->dev, 0, &debugfs_cell, 1, NULL, irq_base);
	if (ret) {
	pr_err("Failed to add debugfs subdevice ret=%d\n", ret);
	goto bail;
	}

	/* Add one device for each regulator used by the board. */
	if (pdata->num_regulators > 0 && pdata->regulator_pdatas) {
	mfd_regulators = kzalloc(sizeof(struct mfd_cell)
	* (pdata->num_regulators), GFP_KERNEL);
	if (!mfd_regulators) {
	pr_err("Cannot allocate %d bytes for pm8018 regulator "
	"mfd cells\n", sizeof(struct mfd_cell)
	* (pdata->num_regulators));
	ret = -ENOMEM;
	goto bail;
	}
	for (i = 0; i < pdata->num_regulators; i++) {
	mfd_regulators[i].name = PM8018_REGULATOR_DEV_NAME;
	mfd_regulators[i].id = pdata->regulator_pdatas[i].id;
	mfd_regulators[i].platform_data =
	&(pdata->regulator_pdatas[i]);
	mfd_regulators[i].pdata_size =
	sizeof(struct pm8018_regulator_platform_data);
	}
	ret = mfd_add_devices(pmic->dev, 0, mfd_regulators,
	pdata->num_regulators, NULL, irq_base);
	if (ret) {
	pr_err("Failed to add regulator subdevices ret=%d\n",
	ret);
	kfree(mfd_regulators);
	goto bail;
	}
	pmic->mfd_regulators = mfd_regulators;
	}

	return 0;
	bail:
	if (pmic->irq_chip) {
	pm8xxx_irq_exit(pmic->irq_chip);
	pmic->irq_chip = NULL;
	}
	return ret;
	}

	static const char * const pm8018_restart_reason[] = {
	[0] = "Unknown",
	[1] = "Triggered from CBL (external charger)",
	[2] = "Triggered from KPD (power key press)",
	[3] = "Triggered from CHG (usb charger insertion)",
	[4] = "Triggered from SMPL (sudden momentary power loss)",
	[5] = "Triggered from RTC (real time clock)",
	[6] = "Triggered by Hard Reset",
	[7] = "Triggered by General Purpose Trigger",
	};

	static const char * const pm8018_rev_names[] = {
	[PM8XXX_REVISION_8018_TEST] = "test",
	[PM8XXX_REVISION_8018_1p0] = "1.0",
	[PM8XXX_REVISION_8018_1p1] = "1.1",
	[PM8XXX_REVISION_8018_2p0] = "2.0",
	};

	static int __devinit pm8018_probe(struct platform_device *pdev)
	{
	const struct pm8018_platform_data *pdata = pdev->dev.platform_data;
	const char *revision_name = "unknown";
	struct pm8018 *pmic;
	enum pm8xxx_version version;
	int revision;
	int rc;
	u8 val;

	if (!pdata) {
	pr_err("missing platform data\n");
	return -EINVAL;
	}

	pmic = kzalloc(sizeof(struct pm8018), GFP_KERNEL);
	if (!pmic) {
	pr_err("Cannot alloc pm8018 struct\n");
	return -ENOMEM;
	}

	/* Read PMIC chip revision */
	rc = msm_ssbi_read(pdev->dev.parent, REG_HWREV, &val, sizeof(val));
	if (rc) {
	pr_err("Failed to read hw rev 1 reg %d:rc=%d\n", REG_HWREV, rc);
	goto err_read_rev;
	}
	pr_info("PMIC revision 1: %02X\n", val);
	pmic->rev_registers = val;

	/* Read PMIC chip revision 2 */
	rc = msm_ssbi_read(pdev->dev.parent, REG_HWREV_2, &val, sizeof(val));
	if (rc) {
	pr_err("Failed to read hw rev 2 reg %d:rc=%d\n", REG_HWREV_2,
	rc);
	goto err_read_rev;
	}
	pr_info("PMIC revision 2: %02X\n", val);
	pmic->rev_registers \|= val << BITS_PER_BYTE;

	pmic->dev = &pdev->dev;
	pm8018_drvdata.pm_chip_data = pmic;
	platform_set_drvdata(pdev, &pm8018_drvdata);

	/* Print out human readable version and revision names. */
	version = pm8xxx_get_version(pmic->dev);
	if (version == PM8XXX_VERSION_8018) {
	revision = pm8xxx_get_revision(pmic->dev);
	if (revision >= 0 && revision < ARRAY_SIZE(pm8018_rev_names))
	revision_name = pm8018_rev_names[revision];
	pr_info("PMIC version: PM8018 rev %s\n", revision_name);
	} else {
	WARN_ON(version != PM8XXX_VERSION_8018);
	}
	/* Log human readable restart reason */
	rc = msm_ssbi_read(pdev->dev.parent, REG_PM8018_PON_CNTRL_3, &val, 1);
	if (rc) {
	pr_err("Cannot read restart reason rc=%d\n", rc);
	goto err_read_rev;
	}
	val &= PM8018_RESTART_REASON_MASK;
	pr_info("PMIC Restart Reason: %s\n", pm8018_restart_reason[val]);

	rc = pm8018_add_subdevices(pdata, pmic);
	if (rc) {
	pr_err("Cannot add subdevices rc=%d\n", rc);
	goto err;
	}

	/* gpio might not work if no irq device is found */
	WARN_ON(pmic->irq_chip == NULL);

	return 0;

	err:
	mfd_remove_devices(pmic->dev);
	platform_set_drvdata(pdev, NULL);
	err_read_rev:
	kfree(pmic);
	return rc;
	}

	static int __devexit pm8018_remove(struct platform_device *pdev)
	{
	struct pm8xxx_drvdata *drvdata;
	struct pm8018 *pmic = NULL;

	drvdata = platform_get_drvdata(pdev);
	if (drvdata)
	pmic = drvdata->pm_chip_data;
	if (pmic)
	mfd_remove_devices(pmic->dev);
	if (pmic->irq_chip) {
	pm8xxx_irq_exit(pmic->irq_chip);
	pmic->irq_chip = NULL;
	}
	platform_set_drvdata(pdev, NULL);
	kfree(pmic->mfd_regulators);
	kfree(pmic);

	return 0;
	}

	static struct platform_driver pm8018_driver = {
	.probe = pm8018_probe,
	.remove = __devexit_p(pm8018_remove),
	.driver = {
	.name = PM8018_CORE_DEV_NAME,
	.owner = THIS_MODULE,
	},
	};

	static int __init pm8018_init(void)
	{
	return platform_driver_register(&pm8018_driver);
	}
	postcore_initcall(pm8018_init);

	static void __exit pm8018_exit(void)
	{
	platform_driver_unregister(&pm8018_driver);
	}
	module_exit(pm8018_exit);

	MODULE_LICENSE("GPL v2");
	MODULE_DESCRIPTION("PMIC 8018 core driver");
	MODULE_VERSION("1.0");
	MODULE_ALIAS("platform:" PM8018_CORE_DEV_NAME);