path: root/drivers/mfd/ricoh619.c

/*
 * driver/mfd/ricoh619.c
 *
 * Core driver implementation to access RICOH R5T619 power management chip.
 *
 * Copyright (C) 2012-2013 RICOH COMPANY,LTD
 *
 * Based on code
 *	Copyright (C) 2011 NVIDIA Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
/*#define DEBUG			1*/
/*#define VERBOSE_DEBUG		1*/
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/mfd/core.h>
#include <linux/mfd/ricoh619.h>


struct sleep_control_data {
	u8 reg_add;
};

#define SLEEP_INIT(_id, _reg)		\
	[RICOH619_DS_##_id] = {.reg_add = _reg}

static struct sleep_control_data sleep_data[] = {
	SLEEP_INIT(DC1, 0x16),
	SLEEP_INIT(DC2, 0x17),
	SLEEP_INIT(DC3, 0x18),
	SLEEP_INIT(DC4, 0x19),
	SLEEP_INIT(DC5, 0x1A),
	SLEEP_INIT(LDO1, 0x1B),
	SLEEP_INIT(LDO2, 0x1C),
	SLEEP_INIT(LDO3, 0x1D),
	SLEEP_INIT(LDO4, 0x1E),
	SLEEP_INIT(LDO5, 0x1F),
	SLEEP_INIT(LDO6, 0x20),
	SLEEP_INIT(LDO7, 0x21),
	SLEEP_INIT(LDO8, 0x22),
	SLEEP_INIT(LDO9, 0x23),
	SLEEP_INIT(LDO10, 0x24),
	SLEEP_INIT(PSO0, 0x25),
	SLEEP_INIT(PSO1, 0x26),
	SLEEP_INIT(PSO2, 0x27),
	SLEEP_INIT(PSO3, 0x28),
	SLEEP_INIT(PSO4, 0x29),
	SLEEP_INIT(LDORTC1, 0x2A),
};

static inline int __ricoh61x_read(struct i2c_client *client,
				  u8 reg, uint8_t *val)
{
	int ret;

	ret = i2c_smbus_read_byte_data(client, reg);
	if (ret < 0) {
		dev_err(&client->dev, "failed reading at 0x%02x\n", reg);
		return ret;
	}

	*val = (uint8_t)ret;
	dev_dbg(&client->dev, "ricoh61x: reg read  reg=%x, val=%x\n",
				reg, *val);
	return 0;
}

static inline int __ricoh61x_bulk_reads(struct i2c_client *client, u8 reg,
				int len, uint8_t *val)
{
	int ret;
	int i;

	ret = i2c_smbus_read_i2c_block_data(client, reg, len, val);
	if (ret < 0) {
		dev_err(&client->dev, "failed reading from 0x%02x\n", reg);
		return ret;
	}
	for (i = 0; i < len; ++i) {
		dev_dbg(&client->dev, "ricoh61x: reg read  reg=%x, val=%x\n",
				reg + i, *(val + i));
	}
	return 0;
}

static inline int __ricoh61x_write(struct i2c_client *client,
				 u8 reg, uint8_t val)
{
	int ret;

	dev_dbg(&client->dev, "ricoh61x: reg write  reg=%x, val=%x\n",
				reg, val);
	ret = i2c_smbus_write_byte_data(client, reg, val);
	if (ret < 0) {
		dev_err(&client->dev, "failed writing 0x%02x to 0x%02x\n",
				val, reg);
		return ret;
	}

	return 0;
}

static inline int __ricoh61x_bulk_writes(struct i2c_client *client, u8 reg,
				  int len, uint8_t *val)
{
	int ret;
	int i;

	for (i = 0; i < len; ++i) {
		dev_dbg(&client->dev, "ricoh61x: reg write  reg=%x, val=%x\n",
				reg + i, *(val + i));
	}

	ret = i2c_smbus_write_i2c_block_data(client, reg, len, val);
	if (ret < 0) {
		dev_err(&client->dev, "failed writings to 0x%02x\n", reg);
		return ret;
	}

	return 0;
}

static inline int set_bank_ricoh61x(struct device *dev, int bank)
{
	struct ricoh61x *ricoh61x = dev_get_drvdata(dev);
	int ret;

	if (bank != (bank & 1))
		return -EINVAL;
	if (bank == ricoh61x->bank_num)
		return 0;
	ret = __ricoh61x_write(to_i2c_client(dev), RICOH61x_REG_BANKSEL, bank);
	if (!ret)
		ricoh61x->bank_num = bank;

	return ret;
}

int ricoh61x_write(struct device *dev, u8 reg, uint8_t val)
{
	struct ricoh61x *ricoh61x = dev_get_drvdata(dev);
	int ret = 0;

	mutex_lock(&ricoh61x->io_lock);
	ret = set_bank_ricoh61x(dev, 0);
	if (!ret)
		ret = __ricoh61x_write(to_i2c_client(dev), reg, val);
	mutex_unlock(&ricoh61x->io_lock);

	return ret;
}
EXPORT_SYMBOL_GPL(ricoh61x_write);

int ricoh61x_write_bank1(struct device *dev, u8 reg, uint8_t val)
{
	struct ricoh61x *ricoh61x = dev_get_drvdata(dev);
	int ret = 0;

	mutex_lock(&ricoh61x->io_lock);
	ret = set_bank_ricoh61x(dev, 1);
	if (!ret)
		ret = __ricoh61x_write(to_i2c_client(dev), reg, val);
	mutex_unlock(&ricoh61x->io_lock);

	return ret;
}
EXPORT_SYMBOL_GPL(ricoh61x_write_bank1);

int ricoh61x_bulk_writes(struct device *dev, u8 reg, u8 len, uint8_t *val)
{
	struct ricoh61x *ricoh61x = dev_get_drvdata(dev);
	int ret = 0;

	mutex_lock(&ricoh61x->io_lock);
	ret = set_bank_ricoh61x(dev, 0);
	if (!ret)
		ret = __ricoh61x_bulk_writes(to_i2c_client(dev), reg, len, val);
	mutex_unlock(&ricoh61x->io_lock);

	return ret;
}
EXPORT_SYMBOL_GPL(ricoh61x_bulk_writes);

int ricoh61x_bulk_writes_bank1(struct device *dev, u8 reg, u8 len, uint8_t *val)
{
	struct ricoh61x *ricoh61x = dev_get_drvdata(dev);
	int ret = 0;

	mutex_lock(&ricoh61x->io_lock);
	ret = set_bank_ricoh61x(dev, 1);
	if (!ret)
		ret = __ricoh61x_bulk_writes(to_i2c_client(dev), reg, len, val);
	mutex_unlock(&ricoh61x->io_lock);

	return ret;
}
EXPORT_SYMBOL_GPL(ricoh61x_bulk_writes_bank1);

int ricoh61x_read(struct device *dev, u8 reg, uint8_t *val)
{
	struct ricoh61x *ricoh61x = dev_get_drvdata(dev);
	int ret = 0;

	mutex_lock(&ricoh61x->io_lock);
	ret = set_bank_ricoh61x(dev, 0);
	if (!ret)
		ret = __ricoh61x_read(to_i2c_client(dev), reg, val);
	mutex_unlock(&ricoh61x->io_lock);

	return ret;
}
EXPORT_SYMBOL_GPL(ricoh61x_read);

int ricoh61x_read_bank1(struct device *dev, u8 reg, uint8_t *val)
{
	struct ricoh61x *ricoh61x = dev_get_drvdata(dev);
	int ret = 0;

	mutex_lock(&ricoh61x->io_lock);
	ret = set_bank_ricoh61x(dev, 1);
	if (!ret)
		ret =  __ricoh61x_read(to_i2c_client(dev), reg, val);
	mutex_unlock(&ricoh61x->io_lock);

	return ret;
}
EXPORT_SYMBOL_GPL(ricoh61x_read_bank1);

int ricoh61x_bulk_reads(struct device *dev, u8 reg, u8 len, uint8_t *val)
{
	struct ricoh61x *ricoh61x = dev_get_drvdata(dev);
	int ret = 0;

	mutex_lock(&ricoh61x->io_lock);
	ret = set_bank_ricoh61x(dev, 0);
	if (!ret)
		ret = __ricoh61x_bulk_reads(to_i2c_client(dev), reg, len, val);
	mutex_unlock(&ricoh61x->io_lock);

	return ret;
}
EXPORT_SYMBOL_GPL(ricoh61x_bulk_reads);

int ricoh61x_bulk_reads_bank1(struct device *dev, u8 reg, u8 len, uint8_t *val)
{
	struct ricoh61x *ricoh61x = dev_get_drvdata(dev);
	int ret = 0;

	mutex_lock(&ricoh61x->io_lock);
	ret = set_bank_ricoh61x(dev, 1);
	if (!ret)
		ret = __ricoh61x_bulk_reads(to_i2c_client(dev), reg, len, val);
	mutex_unlock(&ricoh61x->io_lock);

	return ret;
}
EXPORT_SYMBOL_GPL(ricoh61x_bulk_reads_bank1);

int ricoh61x_set_bits(struct device *dev, u8 reg, uint8_t bit_mask)
{
	struct ricoh61x *ricoh61x = dev_get_drvdata(dev);
	uint8_t reg_val;
	int ret = 0;

	mutex_lock(&ricoh61x->io_lock);
	ret = set_bank_ricoh61x(dev, 0);
	if (!ret) {
		ret = __ricoh61x_read(to_i2c_client(dev), reg, &reg_val);
		if (ret)
			goto out;

		if ((reg_val & bit_mask) != bit_mask) {
			reg_val |= bit_mask;
			ret = __ricoh61x_write(to_i2c_client(dev), reg,
								 reg_val);
		}
	}
out:
	mutex_unlock(&ricoh61x->io_lock);
	return ret;
}
EXPORT_SYMBOL_GPL(ricoh61x_set_bits);

int ricoh61x_clr_bits(struct device *dev, u8 reg, uint8_t bit_mask)
{
	struct ricoh61x *ricoh61x = dev_get_drvdata(dev);
	uint8_t reg_val;
	int ret = 0;

	mutex_lock(&ricoh61x->io_lock);
	ret = set_bank_ricoh61x(dev, 0);
	if (!ret) {
		ret = __ricoh61x_read(to_i2c_client(dev), reg, &reg_val);
		if (ret)
			goto out;

		if (reg_val & bit_mask) {
			reg_val &= ~bit_mask;
			ret = __ricoh61x_write(to_i2c_client(dev), reg,
								 reg_val);
		}
	}
out:
	mutex_unlock(&ricoh61x->io_lock);
	return ret;
}
EXPORT_SYMBOL_GPL(ricoh61x_clr_bits);

int ricoh61x_update(struct device *dev, u8 reg, uint8_t val, uint8_t mask)
{
	struct ricoh61x *ricoh61x = dev_get_drvdata(dev);
	uint8_t reg_val;
	int ret = 0;

	mutex_lock(&ricoh61x->io_lock);
	ret = set_bank_ricoh61x(dev, 0);
	if (!ret) {
		ret = __ricoh61x_read(ricoh61x->client, reg, &reg_val);
		if (ret)
			goto out;

		if ((reg_val & mask) != val) {
			reg_val = (reg_val & ~mask) | (val & mask);
			ret = __ricoh61x_write(ricoh61x->client, reg, reg_val);
		}
	}
out:
	mutex_unlock(&ricoh61x->io_lock);
	return ret;
}
EXPORT_SYMBOL_GPL(ricoh61x_update);

int ricoh61x_update_bank1(struct device *dev, u8 reg, uint8_t val, uint8_t mask)
{
	struct ricoh61x *ricoh61x = dev_get_drvdata(dev);
	uint8_t reg_val;
	int ret = 0;

	mutex_lock(&ricoh61x->io_lock);
	ret = set_bank_ricoh61x(dev, 1);
	if (!ret) {
		ret = __ricoh61x_read(ricoh61x->client, reg, &reg_val);
		if (ret)
			goto out;

		if ((reg_val & mask) != val) {
			reg_val = (reg_val & ~mask) | (val & mask);
			ret = __ricoh61x_write(ricoh61x->client, reg, reg_val);
		}
	}
out:
	mutex_unlock(&ricoh61x->io_lock);
	return ret;
}

static struct i2c_client *ricoh61x_i2c_client;
int ricoh619_cc_sum_clear(void)
{
	int ret;
	uint8_t cc_clr[4] = {0, 0, 0, 0}; /* temporary box */

	if (!ricoh61x_i2c_client)
		return -EINVAL;

	/* CC_pause enter */
	ret = __ricoh61x_write(ricoh61x_i2c_client, RICOH61x_CC_CTRL, 0x01);
	if (ret < 0)
		dev_err(&ricoh61x_i2c_client->dev, 
					"Error in writing CC_CTRL_REG\n");

	/* Write CC_SUM */
	ret = __ricoh61x_bulk_writes(ricoh61x_i2c_client, RICOH61x_CC_SUMREG3, 4, cc_clr);
	if (ret < 0)
		dev_err(&ricoh61x_i2c_client->dev, 
					"Error in writing CC_SUM_REG\n");

	/* CC_pause exit */
	ret = __ricoh61x_write(ricoh61x_i2c_client, RICOH61x_CC_CTRL, 0);
	if (ret < 0)
		dev_err(&ricoh61x_i2c_client->dev, 
					"Error in writing CC_CTRL_REG\n");

	return 0;
}

int ricoh619_power_off(void)
{
	int ret;
	uint8_t reg_val;
	reg_val = g_soc;
	reg_val &= 0x7f;

	if (!ricoh61x_i2c_client)
		return -EINVAL;

	ricoh619_cc_sum_clear();
	
	ret = __ricoh61x_write(ricoh61x_i2c_client, RICOH61x_PSWR, reg_val);
	if (ret < 0)
		dev_err(&ricoh61x_i2c_client->dev, 
					"Error in writing PSWR_REG\n");

	if (g_fg_on_mode == 0) {
		/* Clear RICOH61x_FG_CTRL 0x01 bit */
		ret = __ricoh61x_read(ricoh61x_i2c_client,
				      RICOH61x_FG_CTRL, &reg_val);
		if (reg_val & 0x01) {
			reg_val &= ~0x01;
			ret = __ricoh61x_write(ricoh61x_i2c_client,
					       RICOH61x_FG_CTRL, reg_val);
		}
		if (ret < 0)
			dev_err(&ricoh61x_i2c_client->dev, 
					"Error in writing FG_CTRL\n");
	}

	/* set rapid timer 300 min */
	ret = __ricoh61x_read(ricoh61x_i2c_client,
				      TIMSET_REG, &reg_val);
		
	reg_val |= 0x03;
		
	ret = __ricoh61x_write(ricoh61x_i2c_client,
					       TIMSET_REG, reg_val);
	if (ret < 0)
		dev_err(&ricoh61x_i2c_client->dev, 
				"Error in writing the TIMSET_Reg\n");
  
  	/* Disable all Interrupt */
        __ricoh61x_write(ricoh61x_i2c_client, RICOH61x_INTC_INTEN, 0);

	/* Not repeat power ON after power off(Power Off/N_OE) */
	__ricoh61x_write(ricoh61x_i2c_client, RICOH61x_PWR_REP_CNT, 0x0);

	/* Power OFF */
	__ricoh61x_write(ricoh61x_i2c_client, RICOH61x_PWR_SLP_CNT, 0x1);

	return 0;
}

#include <linux/power/ricoh619_battery.h>
#include <linux/delay.h>

int ricoh619_charger_detect(void)
{
	uint8_t reg_val=0;
	int result = NO_CHARGER_PLUGGED;
	struct ricoh61x *ricoh61x = i2c_get_clientdata(ricoh61x_i2c_client);
	int ret;
	int iInINT = in_interrupt();
	
	//printk("%s(),suspend=%d,atomic=%d,interrupt=%d\n",__FUNCTION__,ricoh61x->iIsSuspending,in_atomic()?1:0,in_interrupt()?1:0);

	if(iInINT) {
		ret = __ricoh61x_read (ricoh61x_i2c_client, CHGSTATE_REG, &reg_val);
	}
	else {
		ret = ricoh61x_read (ricoh61x->dev, CHGSTATE_REG, &reg_val);
	}

	if (0xC0 & reg_val) {
		int retryMax = 50;
		int retryCnt = 0;
		result = UNKOWN_CHARGER;

	 	do {
			if(retryCnt++>=retryMax) {
				printk(KERN_ERR"%s() : retry read BAT_REL_SEL_REG cnt >=%d \n",
						__FUNCTION__,retryMax);
				break;
			}

			if(iInINT) {
				ret = __ricoh61x_read (ricoh61x_i2c_client, BAT_REL_SEL_REG, &reg_val);
			}
			else {
				ret = ricoh61x_read (ricoh61x->dev, BAT_REL_SEL_REG, &reg_val);
			}
			if(0!=ret) {
				printk(KERN_ERR"%s() :read BAT_REL_SEL_REG failed!!,%s\n",
						__FUNCTION__,ricoh61x->iIsSuspending?"suspending":"normal");
			}
			else {
				if(0x04 != (reg_val&0x0C)) {
					// not in Detecting charger state ...
					if (0x20 == (reg_val&0x30))	{// DCP detected. 
						result = DCP_CHARGER;
						//printk("DCP charger\n");
					}
					else if (0x10 == (reg_val&0x30)) {// CDP detected. 
						result = CDP_CHARGER;
						//printk("CDP charger\n");
					}
					else if (0x00 == (reg_val&0x30)) {// SDP detected.
						result = SDP_CHARGER;
						//printk("SDP charger\n");
					}
					else {
						//printk("Other charger\n");
					}

					break;
				}

			}
			if(ricoh61x->iIsSuspending || iInINT ) {
				mdelay (50);
			}
			else {
				msleep (50);
			}
		} while (1);

	}
	return result;
}

int ricoh619_restart(void)
{
	if (!ricoh61x_i2c_client)
		return -EINVAL;

	/* Repeat power ON after power off(Power Off/N_OE) */
	__ricoh61x_write(ricoh61x_i2c_client, RICOH61x_PWR_REP_CNT, 0x5);//500ms off time .

	/* Power OFF */
	__ricoh61x_write(ricoh61x_i2c_client, RICOH61x_PWR_SLP_CNT, 0x1);

	return 0;
}

static int ricoh61x_gpio_get(struct gpio_chip *gc, unsigned offset)
{
	struct ricoh61x *ricoh61x = container_of(gc, struct ricoh61x,
								 gpio_chip);
	uint8_t val;
	int ret;

	ret = ricoh61x_read(ricoh61x->dev, RICOH61x_GPIO_MON_IOIN, &val);
	if (ret < 0)
		return ret;

	return ((val & (0x1 << offset)) != 0);
}

static void ricoh61x_gpio_set(struct gpio_chip *gc, unsigned offset,
			int value)
{
	struct ricoh61x *ricoh61x = container_of(gc, struct ricoh61x,
								 gpio_chip);
	if (value)
		ricoh61x_set_bits(ricoh61x->dev, RICOH61x_GPIO_IOOUT,
						1 << offset);
	else
		ricoh61x_clr_bits(ricoh61x->dev, RICOH61x_GPIO_IOOUT,
						1 << offset);
}

static int ricoh61x_gpio_input(struct gpio_chip *gc, unsigned offset)
{
	struct ricoh61x *ricoh61x = container_of(gc, struct ricoh61x,
								 gpio_chip);

	return ricoh61x_clr_bits(ricoh61x->dev, RICOH61x_GPIO_IOSEL,
						1 << offset);
}

static int ricoh61x_gpio_output(struct gpio_chip *gc, unsigned offset,
				int value)
{
	struct ricoh61x *ricoh61x = container_of(gc, struct ricoh61x,
								 gpio_chip);

	ricoh61x_gpio_set(gc, offset, value);
	return ricoh61x_set_bits(ricoh61x->dev, RICOH61x_GPIO_IOSEL,
						1 << offset);
}

static int ricoh61x_gpio_to_irq(struct gpio_chip *gc, unsigned off)
{
	struct ricoh61x *ricoh61x = container_of(gc, struct ricoh61x,
								 gpio_chip);

	if ((off >= 0) && (off < 8))
		return ricoh61x->irq_base + RICOH61x_IRQ_GPIO0 + off;

	return -EIO;
}


static void __devinit ricoh61x_gpio_init(struct ricoh61x *ricoh61x,
	struct ricoh619_platform_data *pdata)
{
	int ret;
	int i;
	struct ricoh619_gpio_init_data *ginit;

	if (pdata->gpio_base  <= 0)
		return;

	for (i = 0; i < pdata->num_gpioinit_data; ++i) {
		ginit = &pdata->gpio_init_data[i];

		if (!ginit->init_apply)
			continue;

		if (ginit->output_mode_en) {
			/* GPIO output mode */
			if (ginit->output_val)
				/* output H */
				ret = ricoh61x_set_bits(ricoh61x->dev,
					RICOH61x_GPIO_IOOUT, 1 << i);
			else
				/* output L */
				ret = ricoh61x_clr_bits(ricoh61x->dev,
					RICOH61x_GPIO_IOOUT, 1 << i);
			if (!ret)
				ret = ricoh61x_set_bits(ricoh61x->dev,
					RICOH61x_GPIO_IOSEL, 1 << i);
		} else
			/* GPIO input mode */
			ret = ricoh61x_clr_bits(ricoh61x->dev,
					RICOH61x_GPIO_IOSEL, 1 << i);

		/* if LED function enabled in OTP */
		if (ginit->led_mode) {
			/* LED Mode 1 */
			if (i == 0)	/* GP0 */
				ret = ricoh61x_set_bits(ricoh61x->dev,
					 RICOH61x_GPIO_LED_FUNC,
					 0x04 | (ginit->led_func & 0x03));
			if (i == 1)	/* GP1 */
				ret = ricoh61x_set_bits(ricoh61x->dev,
					 RICOH61x_GPIO_LED_FUNC,
					 0x40 | (ginit->led_func & 0x03) << 4);

		}


		if (ret < 0)
			dev_err(ricoh61x->dev, "Gpio %d init "
				"dir configuration failed: %d\n", i, ret);

	}

	ricoh61x->gpio_chip.owner		= THIS_MODULE;
	ricoh61x->gpio_chip.label		= ricoh61x->client->name;
	ricoh61x->gpio_chip.dev			= ricoh61x->dev;
	ricoh61x->gpio_chip.base		= pdata->gpio_base;
	ricoh61x->gpio_chip.ngpio		= RICOH61x_NR_GPIO;
	ricoh61x->gpio_chip.can_sleep	= 1;

	ricoh61x->gpio_chip.direction_input	= ricoh61x_gpio_input;
	ricoh61x->gpio_chip.direction_output	= ricoh61x_gpio_output;
	ricoh61x->gpio_chip.set			= ricoh61x_gpio_set;
	ricoh61x->gpio_chip.get			= ricoh61x_gpio_get;
	ricoh61x->gpio_chip.to_irq		= ricoh61x_gpio_to_irq;

	ret = gpiochip_add(&ricoh61x->gpio_chip);
	if (ret)
		dev_warn(ricoh61x->dev, "GPIO registration failed: %d\n", ret);

#if 0 //[
	// initial ricoh watchdog
	ret = ricoh61x_write(ricoh61x->dev, RICOH61x_PWR_WD, 0x06);
	ret = ricoh61x_set_bits(ricoh61x->dev, RICOH61x_INT_EN_SYS, 0x40);
#endif //]

	// set vindac
	ret = ricoh61x_write(ricoh61x->dev, 0x03, 0x00);//set VINDAC 3.0V . 
}

static int ricoh61x_remove_subdev(struct device *dev, void *unused)
{
	platform_device_unregister(to_platform_device(dev));
	return 0;
}

static int ricoh61x_remove_subdevs(struct ricoh61x *ricoh61x)
{
	return device_for_each_child(ricoh61x->dev, NULL,
				     ricoh61x_remove_subdev);
}

static int __devinit ricoh61x_add_subdevs(struct ricoh61x *ricoh61x,
				struct ricoh619_platform_data *pdata)
{
	struct ricoh619_subdev_info *subdev;
	struct platform_device *pdev;
	int i, ret = 0;

	for (i = 0; i < pdata->num_subdevs; i++) {
		subdev = &pdata->subdevs[i];

		pdev = platform_device_alloc(subdev->name, subdev->id);

		pdev->dev.parent = ricoh61x->dev;
		pdev->dev.platform_data = subdev->platform_data;

		ret = platform_device_add(pdev);
		if (ret)
			goto failed;
	}
	return 0;

failed:
	ricoh61x_remove_subdevs(ricoh61x);
	return ret;
}

#ifdef CONFIG_DEBUG_FS
#include <linux/debugfs.h>
#include <linux/seq_file.h>
static void print_regs(const char *header, struct seq_file *s,
		struct i2c_client *client, int start_offset,
		int end_offset)
{
	uint8_t reg_val;
	int i;
	int ret;

	seq_printf(s, "%s\n", header);
	for (i = start_offset; i <= end_offset; ++i) {
		ret = __ricoh61x_read(client, i, &reg_val);
		if (ret >= 0)
			seq_printf(s, "Reg 0x%02x Value 0x%02x\n", i, reg_val);
	}
	seq_printf(s, "------------------\n");
}

static int dbg_ricoh_show(struct seq_file *s, void *unused)
{
	struct ricoh61x *ricoh = s->private;
	struct i2c_client *client = ricoh->client;

	seq_printf(s, "RICOH61x Registers\n");
	seq_printf(s, "------------------\n");

	print_regs("System Regs",		s, client, 0x0, 0x05);
	print_regs("Power Control Regs",	s, client, 0x07, 0x2B);
	print_regs("DCDC  Regs",		s, client, 0x2C, 0x43);
	print_regs("LDO   Regs",		s, client, 0x44, 0x61);
	print_regs("ADC   Regs",		s, client, 0x64, 0x8F);
	print_regs("GPIO  Regs",		s, client, 0x90, 0x98);
	print_regs("INTC  Regs",		s, client, 0x9C, 0x9E);
	print_regs("RTC   Regs",		s, client, 0xA0, 0xAF);
	print_regs("OPT   Regs",		s, client, 0xB0, 0xB1);
	print_regs("CHG   Regs",		s, client, 0xB2, 0xDF);
	print_regs("FUEL  Regs",		s, client, 0xE0, 0xFC);
	return 0;
}

static int dbg_ricoh_open(struct inode *inode, struct file *file)
{
	return single_open(file, dbg_ricoh_show, inode->i_private);
}

static const struct file_operations debug_fops = {
	.open		= dbg_ricoh_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};
static void __init ricoh61x_debuginit(struct ricoh61x *ricoh)
{
	(void)debugfs_create_file("ricoh61x", S_IRUGO, NULL,
			ricoh, &debug_fops);
}
#else
static void print_regs(const char *header, struct i2c_client *client,
		int start_offset, int end_offset)
{
	uint8_t reg_val;
	int i;
	int ret;

	printk(KERN_INFO "%s\n", header);
	for (i = start_offset; i <= end_offset; ++i) {
		ret = __ricoh61x_read(client, i, &reg_val);
		if (ret >= 0)
			printk(KERN_INFO "Reg 0x%02x Value 0x%02x\n",
							 i, reg_val);
	}
	printk(KERN_INFO "------------------\n");
}
static void __init ricoh61x_debuginit(struct ricoh61x *ricoh)
{
	struct i2c_client *client = ricoh->client;

	printk(KERN_INFO "RICOH61x Registers\n");
	printk(KERN_INFO "------------------\n");

	print_regs("System Regs",		client, 0x0, 0x05);
	print_regs("Power Control Regs",	client, 0x07, 0x2B);
	print_regs("DCDC  Regs",		client, 0x2C, 0x43);
	print_regs("LDO   Regs",		client, 0x44, 0x5C);
	print_regs("ADC   Regs",		client, 0x64, 0x8F);
	print_regs("GPIO  Regs",		client, 0x90, 0x9B);
	print_regs("INTC  Regs",		client, 0x9C, 0x9E);
	print_regs("OPT   Regs",		client, 0xB0, 0xB1);
	print_regs("CHG   Regs",		client, 0xB2, 0xDF);
	print_regs("FUEL  Regs",		client, 0xE0, 0xFC);

	return 0;
}
#endif

static void __devinit ricoh61x_noe_init(struct ricoh61x *ricoh)
{
	struct i2c_client *client = ricoh->client;

	/* N_OE timer setting to 128mS */
	__ricoh61x_write(client, RICOH61x_PWR_NOE_TIMSET, 0x0);
	/* power on/off timer setting to on 1s, off 8S */
	__ricoh61x_write(client, RICOH61x_PWR_ON_TIMSET, 0x5B);
#if 0 	// do not set repeat power on bit to enable force power off by long press power key function.
	/* Repeat power ON after reset (Power Off/N_OE) */
	__ricoh61x_write(client, RICOH61x_PWR_REP_CNT, 0x1);
#endif
}

static int ricoh61x_i2c_probe(struct i2c_client *client,
			      const struct i2c_device_id *id)
{
	struct ricoh61x *ricoh61x;
	struct ricoh619_platform_data *pdata = client->dev.platform_data;
	int ret;
	printk(KERN_INFO "PMU: %s:\n", __func__);

	ricoh61x = kzalloc(sizeof(struct ricoh61x), GFP_KERNEL);
	if (ricoh61x == NULL)
		return -ENOMEM;

	ricoh61x->client = client;
	ricoh61x->dev = &client->dev;
	i2c_set_clientdata(client, ricoh61x);

	mutex_init(&ricoh61x->io_lock);

	ricoh61x->bank_num = 0;

	if (pdata->init_port) {
		/* For init PMIC_IRQ port */
		ret = pdata->init_port(client->irq);
	}

	if (client->irq) {
		ret = ricoh61x_irq_init(ricoh61x, client->irq, pdata->irq_base);
		if (ret) {
			dev_err(&client->dev, "IRQ init failed: %d\n", ret);
			goto err_irq_init;
		}
	}

	ret = ricoh61x_add_subdevs(ricoh61x, pdata);
	if (ret) {
		dev_err(&client->dev, "add devices failed: %d\n", ret);
		goto err_add_devs;
	}

	ricoh61x_noe_init(ricoh61x);

	ricoh61x_gpio_init(ricoh61x, pdata);

	ricoh61x_debuginit(ricoh61x);

	ricoh61x_i2c_client = client;
	return 0;

err_add_devs:
	if (client->irq)
		ricoh61x_irq_exit(ricoh61x);
err_irq_init:
	kfree(ricoh61x);
	return ret;
}

static int  __devexit ricoh61x_i2c_remove(struct i2c_client *client)
{
	struct ricoh61x *ricoh61x = i2c_get_clientdata(client);

	if (client->irq)
		ricoh61x_irq_exit(ricoh61x);

	ricoh61x_remove_subdevs(ricoh61x);
	kfree(ricoh61x);
	return 0;
}

#ifdef CONFIG_PM
static int ricoh61x_i2c_suspend(struct i2c_client *client, pm_message_t state)
{
	struct ricoh61x *ricoh61x = i2c_get_clientdata(client);

	ricoh61x->iIsSuspending = 1;

#if 0
	printk(KERN_INFO "PMU: %s:\n", __func__);
	if (client->irq)
		disable_irq(client->irq);
#endif
	return 0;
}

int pwrkey_wakeup;
static int ricoh61x_i2c_resume(struct i2c_client *client)
{
	struct ricoh61x *ricoh61x = i2c_get_clientdata(client);
	uint8_t reg_val;
	int ret;

//	printk(KERN_INFO "PMU: %s:\n", __func__);
	
	/* Disable all Interrupt */
	__ricoh61x_write(client, RICOH61x_INTC_INTEN, 0x0);

	ret = __ricoh61x_read(client, RICOH61x_INT_IR_SYS, &reg_val);
	if (reg_val & 0x01) { /* If PWR_KEY wakeup */
		printk(KERN_INFO "PMU: %s: PWR_KEY Wakeup\n", __func__);
		pwrkey_wakeup = 1;
		/* Clear PWR_KEY IRQ */
		__ricoh61x_write(client, RICOH61x_INT_IR_SYS, 0x0);
	}
//	enable_irq(client->irq);

	/* Enable all Interrupt */
	__ricoh61x_write(client, RICOH61x_INTC_INTEN, 0xff);

	ricoh61x->iIsSuspending = 0;

	return 0;
}

#endif

static const struct i2c_device_id ricoh61x_i2c_id[] = {
	{"ricoh619", 0},
	{}
};

MODULE_DEVICE_TABLE(i2c, ricoh61x_i2c_id);

static struct i2c_driver ricoh61x_i2c_driver = {
	.driver = {
		   .name = "ricoh619",
		   .owner = THIS_MODULE,
		   },
	.probe = ricoh61x_i2c_probe,
	.remove = __devexit_p(ricoh61x_i2c_remove),
#ifdef CONFIG_PM
	.suspend = ricoh61x_i2c_suspend,
	.resume = ricoh61x_i2c_resume,
#endif
	.id_table = ricoh61x_i2c_id,
};


static int __init ricoh61x_i2c_init(void)
{
	int ret = -ENODEV;

	printk(KERN_INFO "PMU: %s:\n", __func__);

	ret = i2c_add_driver(&ricoh61x_i2c_driver);
	if (ret != 0)
		pr_err("Failed to register I2C driver: %d\n", ret);

	return ret;
}

subsys_initcall(ricoh61x_i2c_init);

static void __exit ricoh61x_i2c_exit(void)
{
	i2c_del_driver(&ricoh61x_i2c_driver);
}

module_exit(ricoh61x_i2c_exit);

MODULE_DESCRIPTION("RICOH R5T619 PMU multi-function core driver");
MODULE_LICENSE("GPL");