drivers/mfd/pm8018-core.c - kernel/msm.git - Git at Google

 /*
  * Copyright (c) 2011-2012, The Linux Foundation. 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/module.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/string.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>
 #include <linux/mfd/pm8xxx/regulator.h>
 #include <linux/leds-pm8xxx.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_IRQ_BASE		0x1BB

 #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 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;
 	struct pm8xxx_regulator_core_platform_data	*regulator_cdata;
 	u32						rev_registers;
 	u8						restart_reason;
 };

 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 u8 pm8018_restart_reason(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->restart_reason;
 }

 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,
 	.pmic_restart_reason	= pm8018_restart_reason,
 };

 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 adc_cell_resources[] __devinitconst = {
 	SINGLE_IRQ_RESOURCE(NULL, PM8018_ADC_EOC_USR_IRQ),
 	SINGLE_IRQ_RESOURCE(NULL, PM8018_ADC_BATT_TEMP_WARM_IRQ),
 	SINGLE_IRQ_RESOURCE(NULL, PM8018_ADC_BATT_TEMP_COLD_IRQ),
 };

 static struct mfd_cell adc_cell __devinitdata = {
 	.name		= PM8XXX_ADC_DEV_NAME,
 	.id		= -1,
 	.resources	= adc_cell_resources,
 	.num_resources	= ARRAY_SIZE(adc_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 struct mfd_cell pwm_cell __devinitdata = {
 	.name           = PM8XXX_PWM_DEV_NAME,
 	.id             = -1,
 };

 static struct mfd_cell leds_cell __devinitdata = {
 	.name		= PM8XXX_LEDS_DEV_NAME,
 	.id		= -1,
 };

 static const struct resource thermal_alarm_cell_resources[] __devinitconst = {
 	SINGLE_IRQ_RESOURCE("pm8018_tempstat_irq", PM8018_TEMPSTAT_IRQ),
 	SINGLE_IRQ_RESOURCE("pm8018_overtemp_irq", PM8018_OVERTEMP_IRQ),
 };

 static struct pm8xxx_tm_core_data thermal_alarm_cdata = {
 	.adc_channel =			CHANNEL_DIE_TEMP,
 	.adc_type =			PM8XXX_TM_ADC_PM8XXX_ADC,
 	.reg_addr_temp_alarm_ctrl =	REG_TEMP_ALARM_CTRL,
 	.reg_addr_temp_alarm_pwm =	REG_TEMP_ALARM_PWM,
 	.tm_name =			"pm8018_tz",
 	.irq_name_temp_stat =		"pm8018_tempstat_irq",
 	.irq_name_over_temp =		"pm8018_overtemp_irq",
 };

 static struct mfd_cell thermal_alarm_cell __devinitdata = {
 	.name		= PM8XXX_TM_DEV_NAME,
 	.id		= -1,
 	.resources	= thermal_alarm_cell_resources,
 	.num_resources	= ARRAY_SIZE(thermal_alarm_cell_resources),
 	.platform_data	= &thermal_alarm_cdata,
 	.pdata_size	= sizeof(struct pm8xxx_tm_core_data),
 };

 static struct pm8xxx_vreg regulator_data[] = {
 	/*   name	     pc_name	    ctrl   test   hpm_min */
 	PLDO("8018_l2",      "8018_l2_pc",  0x0B0, 0x0B1, LDO_50),
 	PLDO("8018_l3",      "8018_l3_pc",  0x0B2, 0x0B3, LDO_50),
 	PLDO("8018_l4",      "8018_l4_pc",  0x0B4, 0x0B5, LDO_300),
 	PLDO("8018_l5",      "8018_l5_pc",  0x0B6, 0x0B7, LDO_150),
 	PLDO("8018_l6",      "8018_l6_pc",  0x0B8, 0x0B9, LDO_150),
 	PLDO("8018_l7",      "8018_l7_pc",  0x0BA, 0x0BB, LDO_300),
 	NLDO("8018_l8",      "8018_l8_pc",  0x0BC, 0x0BD, LDO_150),
 	NLDO1200("8018_l9",		    0x0BE, 0x0BF, LDO_1200),
 	NLDO1200("8018_l10",		    0x0C0, 0x0C1, LDO_1200),
 	NLDO1200("8018_l11",		    0x0C2, 0x0C3, LDO_1200),
 	NLDO1200("8018_l12",		    0x0C4, 0x0C5, LDO_1200),
 	PLDO("8018_l13",     "8018_l13_pc", 0x0C8, 0x0C9, LDO_50),
 	PLDO("8018_l14",     "8018_l14_pc", 0x0CA, 0x0CB, LDO_50),

 	/*   name	pc_name       ctrl   test2  clk    sleep  hpm_min */
 	SMPS("8018_s1", "8018_s1_pc", 0x1D0, 0x1D5, 0x009, 0x1D2, SMPS_1500),
 	SMPS("8018_s2", "8018_s2_pc", 0x1D8, 0x1DD, 0x00A, 0x1DA, SMPS_1500),
 	SMPS("8018_s3", "8018_s3_pc", 0x1E0, 0x1E5, 0x00B, 0x1E2, SMPS_1500),
 	SMPS("8018_s4", "8018_s4_pc", 0x1E8, 0x1ED, 0x00C, 0x1EA, SMPS_1500),
 	SMPS("8018_s5", "8018_s5_pc", 0x1F0, 0x1F5, 0x00D, 0x1F2, SMPS_1500),

 	/* name		     pc_name	     ctrl   test */
 	VS("8018_lvs1",      "8018_lvs1_pc", 0x060, 0x061),
 };

 #define MAX_NAME_COMPARISON_LEN 32

 static int __devinit match_regulator(
 	struct pm8xxx_regulator_core_platform_data *core_data, const char *name)
 {
 	int found = 0;
 	int i;

 	for (i = 0; i < ARRAY_SIZE(regulator_data); i++) {
 		if (regulator_data[i].rdesc.name
 		    && strncmp(regulator_data[i].rdesc.name, name,
 				MAX_NAME_COMPARISON_LEN) == 0) {
 			core_data->is_pin_controlled = false;
 			core_data->vreg = &regulator_data[i];
 			found = 1;
 			break;
 		} else if (regulator_data[i].rdesc_pc.name
 			   && strncmp(regulator_data[i].rdesc_pc.name, name,
 				MAX_NAME_COMPARISON_LEN) == 0) {
 			core_data->is_pin_controlled = true;
 			core_data->vreg = &regulator_data[i];
 			found = 1;
 			break;
 		}
 	}

 	if (!found)
 		pr_err("could not find a match for regulator: %s\n", name);

 	return found;
 }

 static int __devinit
 pm8018_add_regulators(const struct pm8018_platform_data *pdata,
 		      struct pm8018 *pmic, int irq_base)
 {
 	int ret = 0;
 	struct mfd_cell *mfd_regulators;
 	struct pm8xxx_regulator_core_platform_data *cdata;
 	int i;

 	/* Add one device for each regulator used by the board. */
 	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));
 		return -ENOMEM;
 	}
 	cdata = kzalloc(sizeof(struct pm8xxx_regulator_core_platform_data)
 			* pdata->num_regulators, GFP_KERNEL);
 	if (!cdata) {
 		pr_err("Cannot allocate %d bytes for pm8018 regulator "
 			"core data\n", pdata->num_regulators
 			  * sizeof(struct pm8xxx_regulator_core_platform_data));
 		kfree(mfd_regulators);
 		return -ENOMEM;
 	}
 	for (i = 0; i < ARRAY_SIZE(regulator_data); i++)
 		mutex_init(&regulator_data[i].pc_lock);

 	for (i = 0; i < pdata->num_regulators; i++) {
 		if (!pdata->regulator_pdatas[i].init_data.constraints.name) {
 			pr_err("name missing for regulator %d\n", i);
 			ret = -EINVAL;
 			goto bail;
 		}
 		if (!match_regulator(&cdata[i],
 		      pdata->regulator_pdatas[i].init_data.constraints.name)) {
 			ret = -ENODEV;
 			goto bail;
 		}
 		cdata[i].pdata = &(pdata->regulator_pdatas[i]);
 		mfd_regulators[i].name = PM8XXX_REGULATOR_DEV_NAME;
 		mfd_regulators[i].id = cdata[i].pdata->id;
 		mfd_regulators[i].platform_data = &cdata[i];
 		mfd_regulators[i].pdata_size =
 			sizeof(struct pm8xxx_regulator_core_platform_data);
 	}
 	ret = mfd_add_devices(pmic->dev, 0, mfd_regulators,
 			pdata->num_regulators, NULL, irq_base);
 	if (ret)
 		goto bail;

 	pmic->mfd_regulators = mfd_regulators;
 	pmic->regulator_cdata = cdata;
 	return ret;

 bail:
 	for (i = 0; i < ARRAY_SIZE(regulator_data); i++)
 		mutex_destroy(&regulator_data[i].pc_lock);
 	kfree(mfd_regulators);
 	kfree(cdata);
 	return ret;
 }

 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;

 	if (pdata->irq_pdata) {
 		pdata->irq_pdata->irq_cdata.nirqs = PM8018_NR_IRQS;
 		pdata->irq_pdata->irq_cdata.base_addr = REG_IRQ_BASE;
 		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;
 		}
 	}

 	if (pdata->adc_pdata) {
 		adc_cell.platform_data = pdata->adc_pdata;
 		adc_cell.pdata_size = sizeof(struct pm8xxx_adc_platform_data);
 		ret = mfd_add_devices(pmic->dev, 0, &adc_cell, 1, NULL,
 				      irq_base);
 		if (ret) {
 			pr_err("Failed to add adc subdevice ret=%d\n", ret);
 		}
 	}

 	if (pdata->leds_pdata) {
 		leds_cell.platform_data = pdata->leds_pdata;
 		leds_cell.pdata_size = sizeof(struct pm8xxx_led_platform_data);
 		ret = mfd_add_devices(pmic->dev, 0, &leds_cell, 1, NULL, 0);
 		if (ret) {
 			pr_err("Failed to add leds 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;
 	}

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

 	if (pdata->num_regulators > 0 && pdata->regulator_pdatas) {
 		ret = pm8018_add_regulators(pdata, pmic, irq_base);
 		if (ret) {
 			pr_err("Failed to add regulator subdevices ret=%d\n",
 				ret);
 			goto bail;
 		}
 	}

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

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

 static const char * const pm8018_rev_names[] = {
 	[PM8XXX_REVISION_8018_TEST]	= "test",
 	[PM8XXX_REVISION_8018_1p0]	= "1.0",
 	[PM8XXX_REVISION_8018_2p0]	= "2.0",
 	[PM8XXX_REVISION_8018_2p1]	= "2.1",
 };

 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 &= PM8XXX_RESTART_REASON_MASK;
 	pr_info("PMIC Restart Reason: %s\n", pm8xxx_restart_reason_str[val]);
 	pmic->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);
 	kfree(pmic->mfd_regulators);
 	kfree(pmic->regulator_cdata);
 err_read_rev:
 	kfree(pmic);
 	return rc;
 }

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

 	drvdata = platform_get_drvdata(pdev);
 	if (drvdata)
 		pmic = drvdata->pm_chip_data;
 	if (pmic) {
 		if (pmic->dev)
 			mfd_remove_devices(pmic->dev);
 		if (pmic->irq_chip) {
 			pm8xxx_irq_exit(pmic->irq_chip);
 			pmic->irq_chip = NULL;
 		}
 		if (pmic->mfd_regulators) {
 			for (i = 0; i < ARRAY_SIZE(regulator_data); i++)
 				mutex_destroy(&regulator_data[i].pc_lock);
 		}
 		kfree(pmic->mfd_regulators);
 		kfree(pmic->regulator_cdata);
 		kfree(pmic);
 	}
 	platform_set_drvdata(pdev, NULL);

 	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) 2011-2012, The Linux Foundation. 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/module.h>
	#include <linux/platform_device.h>
	#include <linux/slab.h>
	#include <linux/string.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>
	#include <linux/mfd/pm8xxx/regulator.h>
	#include <linux/leds-pm8xxx.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_IRQ_BASE 0x1BB

	#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 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;
	struct pm8xxx_regulator_core_platform_data *regulator_cdata;
	u32 rev_registers;
	u8 restart_reason;
	};

	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 u8 pm8018_restart_reason(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->restart_reason;
	}

	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,
	.pmic_restart_reason = pm8018_restart_reason,
	};

	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 adc_cell_resources[] __devinitconst = {
	SINGLE_IRQ_RESOURCE(NULL, PM8018_ADC_EOC_USR_IRQ),
	SINGLE_IRQ_RESOURCE(NULL, PM8018_ADC_BATT_TEMP_WARM_IRQ),
	SINGLE_IRQ_RESOURCE(NULL, PM8018_ADC_BATT_TEMP_COLD_IRQ),
	};

	static struct mfd_cell adc_cell __devinitdata = {
	.name = PM8XXX_ADC_DEV_NAME,
	.id = -1,
	.resources = adc_cell_resources,
	.num_resources = ARRAY_SIZE(adc_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 struct mfd_cell pwm_cell __devinitdata = {
	.name = PM8XXX_PWM_DEV_NAME,
	.id = -1,
	};

	static struct mfd_cell leds_cell __devinitdata = {
	.name = PM8XXX_LEDS_DEV_NAME,
	.id = -1,
	};

	static const struct resource thermal_alarm_cell_resources[] __devinitconst = {
	SINGLE_IRQ_RESOURCE("pm8018_tempstat_irq", PM8018_TEMPSTAT_IRQ),
	SINGLE_IRQ_RESOURCE("pm8018_overtemp_irq", PM8018_OVERTEMP_IRQ),
	};

	static struct pm8xxx_tm_core_data thermal_alarm_cdata = {
	.adc_channel = CHANNEL_DIE_TEMP,
	.adc_type = PM8XXX_TM_ADC_PM8XXX_ADC,
	.reg_addr_temp_alarm_ctrl = REG_TEMP_ALARM_CTRL,
	.reg_addr_temp_alarm_pwm = REG_TEMP_ALARM_PWM,
	.tm_name = "pm8018_tz",
	.irq_name_temp_stat = "pm8018_tempstat_irq",
	.irq_name_over_temp = "pm8018_overtemp_irq",
	};

	static struct mfd_cell thermal_alarm_cell __devinitdata = {
	.name = PM8XXX_TM_DEV_NAME,
	.id = -1,
	.resources = thermal_alarm_cell_resources,
	.num_resources = ARRAY_SIZE(thermal_alarm_cell_resources),
	.platform_data = &thermal_alarm_cdata,
	.pdata_size = sizeof(struct pm8xxx_tm_core_data),
	};

	static struct pm8xxx_vreg regulator_data[] = {
	/* name pc_name ctrl test hpm_min */
	PLDO("8018_l2", "8018_l2_pc", 0x0B0, 0x0B1, LDO_50),
	PLDO("8018_l3", "8018_l3_pc", 0x0B2, 0x0B3, LDO_50),
	PLDO("8018_l4", "8018_l4_pc", 0x0B4, 0x0B5, LDO_300),
	PLDO("8018_l5", "8018_l5_pc", 0x0B6, 0x0B7, LDO_150),
	PLDO("8018_l6", "8018_l6_pc", 0x0B8, 0x0B9, LDO_150),
	PLDO("8018_l7", "8018_l7_pc", 0x0BA, 0x0BB, LDO_300),
	NLDO("8018_l8", "8018_l8_pc", 0x0BC, 0x0BD, LDO_150),
	NLDO1200("8018_l9", 0x0BE, 0x0BF, LDO_1200),
	NLDO1200("8018_l10", 0x0C0, 0x0C1, LDO_1200),
	NLDO1200("8018_l11", 0x0C2, 0x0C3, LDO_1200),
	NLDO1200("8018_l12", 0x0C4, 0x0C5, LDO_1200),
	PLDO("8018_l13", "8018_l13_pc", 0x0C8, 0x0C9, LDO_50),
	PLDO("8018_l14", "8018_l14_pc", 0x0CA, 0x0CB, LDO_50),

	/* name pc_name ctrl test2 clk sleep hpm_min */
	SMPS("8018_s1", "8018_s1_pc", 0x1D0, 0x1D5, 0x009, 0x1D2, SMPS_1500),
	SMPS("8018_s2", "8018_s2_pc", 0x1D8, 0x1DD, 0x00A, 0x1DA, SMPS_1500),
	SMPS("8018_s3", "8018_s3_pc", 0x1E0, 0x1E5, 0x00B, 0x1E2, SMPS_1500),
	SMPS("8018_s4", "8018_s4_pc", 0x1E8, 0x1ED, 0x00C, 0x1EA, SMPS_1500),
	SMPS("8018_s5", "8018_s5_pc", 0x1F0, 0x1F5, 0x00D, 0x1F2, SMPS_1500),

	/* name pc_name ctrl test */
	VS("8018_lvs1", "8018_lvs1_pc", 0x060, 0x061),
	};

	#define MAX_NAME_COMPARISON_LEN 32

	static int __devinit match_regulator(
	struct pm8xxx_regulator_core_platform_data core_data, const char name)
	{
	int found = 0;
	int i;

	for (i = 0; i < ARRAY_SIZE(regulator_data); i++) {
	if (regulator_data[i].rdesc.name
	&& strncmp(regulator_data[i].rdesc.name, name,
	MAX_NAME_COMPARISON_LEN) == 0) {
	core_data->is_pin_controlled = false;
	core_data->vreg = &regulator_data[i];
	found = 1;
	break;
	} else if (regulator_data[i].rdesc_pc.name
	&& strncmp(regulator_data[i].rdesc_pc.name, name,
	MAX_NAME_COMPARISON_LEN) == 0) {
	core_data->is_pin_controlled = true;
	core_data->vreg = &regulator_data[i];
	found = 1;
	break;
	}
	}

	if (!found)
	pr_err("could not find a match for regulator: %s\n", name);

	return found;
	}

	static int __devinit
	pm8018_add_regulators(const struct pm8018_platform_data *pdata,
	struct pm8018 *pmic, int irq_base)
	{
	int ret = 0;
	struct mfd_cell *mfd_regulators;
	struct pm8xxx_regulator_core_platform_data *cdata;
	int i;

	/* Add one device for each regulator used by the board. */
	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));
	return -ENOMEM;
	}
	cdata = kzalloc(sizeof(struct pm8xxx_regulator_core_platform_data)
	* pdata->num_regulators, GFP_KERNEL);
	if (!cdata) {
	pr_err("Cannot allocate %d bytes for pm8018 regulator "
	"core data\n", pdata->num_regulators
	* sizeof(struct pm8xxx_regulator_core_platform_data));
	kfree(mfd_regulators);
	return -ENOMEM;
	}
	for (i = 0; i < ARRAY_SIZE(regulator_data); i++)
	mutex_init(&regulator_data[i].pc_lock);

	for (i = 0; i < pdata->num_regulators; i++) {
	if (!pdata->regulator_pdatas[i].init_data.constraints.name) {
	pr_err("name missing for regulator %d\n", i);
	ret = -EINVAL;
	goto bail;
	}
	if (!match_regulator(&cdata[i],
	pdata->regulator_pdatas[i].init_data.constraints.name)) {
	ret = -ENODEV;
	goto bail;
	}
	cdata[i].pdata = &(pdata->regulator_pdatas[i]);
	mfd_regulators[i].name = PM8XXX_REGULATOR_DEV_NAME;
	mfd_regulators[i].id = cdata[i].pdata->id;
	mfd_regulators[i].platform_data = &cdata[i];
	mfd_regulators[i].pdata_size =
	sizeof(struct pm8xxx_regulator_core_platform_data);
	}
	ret = mfd_add_devices(pmic->dev, 0, mfd_regulators,
	pdata->num_regulators, NULL, irq_base);
	if (ret)
	goto bail;

	pmic->mfd_regulators = mfd_regulators;
	pmic->regulator_cdata = cdata;
	return ret;

	bail:
	for (i = 0; i < ARRAY_SIZE(regulator_data); i++)
	mutex_destroy(&regulator_data[i].pc_lock);
	kfree(mfd_regulators);
	kfree(cdata);
	return ret;
	}

	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;

	if (pdata->irq_pdata) {
	pdata->irq_pdata->irq_cdata.nirqs = PM8018_NR_IRQS;
	pdata->irq_pdata->irq_cdata.base_addr = REG_IRQ_BASE;
	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;
	}
	}

	if (pdata->adc_pdata) {
	adc_cell.platform_data = pdata->adc_pdata;
	adc_cell.pdata_size = sizeof(struct pm8xxx_adc_platform_data);
	ret = mfd_add_devices(pmic->dev, 0, &adc_cell, 1, NULL,
	irq_base);
	if (ret) {
	pr_err("Failed to add adc subdevice ret=%d\n", ret);
	}
	}

	if (pdata->leds_pdata) {
	leds_cell.platform_data = pdata->leds_pdata;
	leds_cell.pdata_size = sizeof(struct pm8xxx_led_platform_data);
	ret = mfd_add_devices(pmic->dev, 0, &leds_cell, 1, NULL, 0);
	if (ret) {
	pr_err("Failed to add leds 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;
	}

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

	if (pdata->num_regulators > 0 && pdata->regulator_pdatas) {
	ret = pm8018_add_regulators(pdata, pmic, irq_base);
	if (ret) {
	pr_err("Failed to add regulator subdevices ret=%d\n",
	ret);
	goto bail;
	}
	}

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

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

	static const char * const pm8018_rev_names[] = {
	[PM8XXX_REVISION_8018_TEST] = "test",
	[PM8XXX_REVISION_8018_1p0] = "1.0",
	[PM8XXX_REVISION_8018_2p0] = "2.0",
	[PM8XXX_REVISION_8018_2p1] = "2.1",
	};

	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 &= PM8XXX_RESTART_REASON_MASK;
	pr_info("PMIC Restart Reason: %s\n", pm8xxx_restart_reason_str[val]);
	pmic->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);
	kfree(pmic->mfd_regulators);
	kfree(pmic->regulator_cdata);
	err_read_rev:
	kfree(pmic);
	return rc;
	}

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

	drvdata = platform_get_drvdata(pdev);
	if (drvdata)
	pmic = drvdata->pm_chip_data;
	if (pmic) {
	if (pmic->dev)
	mfd_remove_devices(pmic->dev);
	if (pmic->irq_chip) {
	pm8xxx_irq_exit(pmic->irq_chip);
	pmic->irq_chip = NULL;
	}
	if (pmic->mfd_regulators) {
	for (i = 0; i < ARRAY_SIZE(regulator_data); i++)
	mutex_destroy(&regulator_data[i].pc_lock);
	}
	kfree(pmic->mfd_regulators);
	kfree(pmic->regulator_cdata);
	kfree(pmic);
	}
	platform_set_drvdata(pdev, NULL);

	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);