Re: RFC: bq2415x_charger driver

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Wednesday 07 December 2011 23:25:12 Vladimir Zapolskiy wrote:
> Hi Pali,
>
> On 07.12.2011 23:03, Pali Rohár wrote:
> > Hello,
> >
> > I'm sending preview of my implementation of bq2415x charger driver. Now
> > all code is in one kernel module bq2415x_charger which has more
> > interfaces (power_supply, sysfs, regulator). It is still unfinished,
> > missing more bq2415x configuration like sysfs entires for boost,
> > voltages or platform hooks (e.g. rx51 isp1704). This driver will have
> > similar sysfs interface as in Joerg Reisenweber spec
> > http://maemo.cloud-7.de/bq24150-sysnode.spec.txt . Driver should be
> > replacemnt for Nokia N900 proprietary charging program BME. I was
> > inspirated by driver bq27x00_battery and other bq2415x implementaton by
> > Aliaksei Katovich and Felipe Contreras.
> >
> > Please comment implementation and write what should be added or modified
> > in driver (it is still not complete).
>
> There are well defined policies regarding patch review in the Linux
> kernel mailing lists. I encourage you to take a look at
> http://felipec.wordpress.com/2009/10/25/git-send-email-tricks/

Ok, I do not know where to put this driver, so I only send files. Here is diff

diff --git a/drivers/power/bq2415x_charger.c b/drivers/power/bq2415x_charger.c
new file mode 100644
index 0000000..eb9957a
--- /dev/null
+++ b/drivers/power/bq2415x_charger.c
@@ -0,0 +1,1115 @@
+/*
+    bq2415x_charger.c - bq2415x charger driver
+    Copyright (C) 2011  Pali Rohár <pali.rohar@xxxxxxxxx>
+
+    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, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+/*
+  Datasheets:
+  http://www.ti.com/product/bq24150
+  http://www.ti.com/product/bq24150a
+  http://www.ti.com/product/bq24152
+  http://www.ti.com/product/bq24153
+  http://www.ti.com/product/bq24153a
+  http://www.ti.com/product/bq24155
+*/
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/param.h>
+#include <linux/err.h>
+#include <linux/workqueue.h>
+#include <linux/sysfs.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/power_supply.h>
+#include <linux/idr.h>
+#include <linux/leds.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+
+#include "bq2415x_charger.h"
+
+#define BQ2415X_WATCHDOG_TIMEOUT	10
+
+#define BQ2415X_REG_STATUS		0x00
+#define BQ2415X_REG_CONTROL		0x01
+#define BQ2415X_REG_VOLTAGE		0x02
+#define BQ2415X_REG_VENDER		0x03
+#define BQ2415X_REG_CURRENT		0x04
+
+/* reset state for all registers */
+#define BQ2415X_RESET_STATUS		BIT(6)
+#define BQ2415X_RESET_CONTROL		(BIT(4)|BIT(5))
+#define BQ2415X_RESET_VOLTAGE		(BIT(1)|BIT(3))
+#define BQ2415X_RESET_CURRENT		(BIT(0)|BIT(3)|BIT(7))
+
+/* status register */
+#define BQ2415X_BIT_TMR_RST		7
+#define BQ2415X_BIT_OTG			7
+#define BQ2415X_BIT_EN_STAT		6
+#define BQ2415X_MASK_STAT		(BIT(4)|BIT(5))
+#define BQ2415X_SHIFT_STAT		4
+#define BQ2415X_BIT_BOOST		3
+#define BQ2415X_MASK_FAULT		(BIT(0)|BIT(1)|BIT(2))
+#define BQ2415X_SHIFT_FAULT		0
+
+/* control register */
+#define BQ2415X_MASK_LIMIT		(BIT(6)|BIT(7))
+#define BQ2415X_SHIFT_LIMIT		6
+#define BQ2415X_MASK_VLOWV		(BIT(4)|BIT(5))
+#define BQ2415X_SHIFT_VLOWV		4
+#define BQ2415X_BIT_TE			3
+#define BQ2415X_BIT_CE			2
+#define BQ2415X_BIT_HZ_MODE		1
+#define BQ2415X_BIT_OPA_MODE		0
+
+/* voltage register */
+#define BQ2415X_MASK_VO			(BIT(2)|BIT(3)|BIT(4)|BIT(5)|BIT(6)|BIT(7))
+#define BQ2415X_SHIFT_VO		2
+#define BQ2415X_BIT_OTG_PL		1
+#define BQ2415X_BIT_OTG_EN		0
+
+/* vender register */
+#define BQ2415X_MASK_VENDER		(BIT(5)|BIT(6)|BIT(7))
+#define BQ2415X_SHIFT_VENDER		5
+#define BQ2415X_MASK_PN			(BIT(3)|BIT(4))
+#define BQ2415X_SHIFT_PN		4
+#define BQ2415X_MASK_REVISION		(BIT(0)|BIT(1)|BIT(2))
+#define BQ2415X_SHIFT_REVISION		0
+
+/* current register */
+/* RESET				BIT(7) */
+#define BQ2415X_MASK_VI_CHRG		(BIT(4)|BIT(5)|BIT(6))
+#define BQ2415X_SHIFT_VI_CHRG		4
+/* N/A					BIT(3) */
+#define BQ2415X_MASK_VI_TERM		(BIT(0)|BIT(1)|BIT(2))
+#define BQ2415X_SHIFT_VI_TERM		0
+
+struct bq2415x_regulator {
+	struct regulator_ops ops;
+	struct regulator_desc desc;
+	struct regulator_dev *dev;
+};
+
+struct bq2415x_device {
+	struct device *dev;
+	struct bq2415x_platform_data *platform_data;
+	struct bq2415x_regulator current_limit;
+	struct bq2415x_regulator weak_battery_voltage;
+	struct bq2415x_regulator battery_regulation_voltage;
+	struct bq2415x_regulator charge_current_sense_voltage;
+	struct bq2415x_regulator termination_current_sense_voltage;
+	struct led_classdev led;
+	struct power_supply charger;
+	struct delayed_work work;
+	int watchdog;
+	enum bq2415x_chip chip;
+	char *name;
+	int id;
+};
+
+static DEFINE_IDR(bq2415x_id);
+static DEFINE_MUTEX(bq2415x_mutex);
+
+/* i2c read functions */
+
+static int bq2415x_i2c_read(struct bq2415x_device *bq, u8 reg)
+{
+	struct i2c_client *client = to_i2c_client(bq->dev);
+	struct i2c_msg msg[2];
+	u8 val;
+	int ret;
+
+	dev_info(bq->dev, "bq2415x_i2c_read reg=%#x\n", reg);
+
+	if (!client->adapter)
+		return -ENODEV;
+
+	msg[0].addr = client->addr;
+	msg[0].flags = 0;
+	msg[0].buf = &reg;
+	msg[0].len = sizeof(reg);
+	msg[1].addr = client->addr;
+	msg[1].flags = I2C_M_RD;
+	msg[1].buf = &val;
+	msg[1].len = sizeof(val);
+
+	mutex_lock(&bq2415x_mutex);
+	ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
+	mutex_unlock(&bq2415x_mutex);
+
+	if (ret < 0)
+		return ret;
+
+	return val;
+}
+
+static int bq2415x_i2c_read_mask(struct bq2415x_device *bq, u8 reg, u8 mask, u8 shift)
+{
+	int ret;
+
+	dev_info(bq->dev, "bq2415x_i2c_read_mask reg=%#x mask=%#x shift=%#x\n", reg, mask, shift);
+
+	if (shift > 8)
+		return -EINVAL;
+
+	ret = bq2415x_i2c_read(bq, reg);
+	if (ret < 0)
+		return ret;
+	else
+		return (ret & mask) >> shift;
+}
+
+static int bq2415x_i2c_read_bit(struct bq2415x_device *bq, u8 reg, u8 bit)
+{
+	if (bit > 8)
+		return -EINVAL;
+	else
+		return bq2415x_i2c_read_mask(bq, reg, BIT(bit), bit);
+}
+
+/* i2c write functions */
+
+static int bq2415x_i2c_write(struct bq2415x_device *bq, u8 reg, u8 val)
+{
+	struct i2c_client *client = to_i2c_client(bq->dev);
+	struct i2c_msg msg[1];
+	u8 data[2];
+	int ret;
+
+	dev_info(bq->dev, "bq2415x_i2c_write reg=%#x val=%#x\n", reg, val);
+
+	data[0] = reg;
+	data[1] = val;
+
+	msg[0].addr = client->addr;
+	msg[0].flags = 0;
+	msg[0].buf = data;
+	msg[0].len = ARRAY_SIZE(data);
+
+	mutex_lock(&bq2415x_mutex);
+	ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
+	mutex_unlock(&bq2415x_mutex);
+
+	/* i2c_transfer returns number of messages transferred */
+	if (ret < 0)
+		return ret;
+	else if (ret != 1)
+		return -EIO;
+
+	return 0;
+}
+
+static int bq2415x_i2c_write_mask(struct bq2415x_device *bq, u8 reg, u8 val, u8 mask, u8 shift)
+{
+	int ret;
+
+	dev_info(bq->dev, "bq2415x_i2c_write_mask reg=%#x val=%#x mask=%#x shift=%#x\n", reg, val, mask, shift);
+
+	if (shift > 8)
+		return -EINVAL;
+
+	ret = bq2415x_i2c_read(bq, reg);
+	if (ret < 0)
+		return ret;
+
+	ret &= ~mask;
+	ret |= val << shift;
+
+	return bq2415x_i2c_write(bq, reg, ret);
+}
+
+static int bq2415x_i2c_write_bit(struct bq2415x_device *bq, u8 reg, bool val, u8 bit)
+{
+	if (bit > 8)
+		return -EINVAL;
+	else
+		return bq2415x_i2c_write_mask(bq, reg, val, BIT(bit), bit);
+}
+
+/* global detect chip */
+
+enum bq2415x_chip bq2415x_detect_chip(struct bq2415x_device *bq)
+{
+	struct i2c_client *client = to_i2c_client(bq->dev);
+	int ret = bq2415x_exec_command(bq, BQ2415X_PART_NUMBER);
+	if (ret < 0)
+		return ret;
+	if (client->addr == 0x6b) {
+		switch (ret) {
+			case 0:
+				if (bq->chip == BQ24151A)
+					return bq->chip;
+				else
+					return BQ24151;
+			case 1:
+				if (bq->chip == BQ24150A || bq->chip == BQ24152 || bq->chip == BQ24155)
+					return bq->chip;
+				else
+					return BQ24150;
+			case 2:
+				if (bq->chip == BQ24153A)
+					return bq->chip;
+				else
+					return BQ24153;
+			default:
+				return BQUNKNOWN;
+		}
+	} else if (client->addr == 0x6a) {
+		switch (ret) {
+			case 0:
+				if (bq->chip == BQ24156A)
+					return bq->chip;
+				else
+					return BQ24156;
+			case 2:
+				return BQ24158;
+			default:
+				return BQUNKNOWN;
+		}
+	}
+	return BQUNKNOWN;
+}
+EXPORT_SYMBOL_GPL(bq2415x_detect_chip);
+
+/* global exec command function */
+
+int bq2415x_exec_command(struct bq2415x_device *bq, enum bq2415x_command command)
+{
+	switch(command)
+	{
+		case BQ2415X_WATCHDOG_RESET:
+			return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 1, BQ2415X_BIT_TMR_RST);
+		case BQ2415X_OTG_STATUS:
+			return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS, BQ2415X_BIT_OTG);
+		case BQ2415X_STAT_PIN_STATUS:
+			return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS, BQ2415X_BIT_EN_STAT);
+		case BQ2415X_STAT_PIN_ENABLE:
+			return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 1, BQ2415X_BIT_EN_STAT);
+		case BQ2415X_STAT_PIN_DISABLE:
+			return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 0, BQ2415X_BIT_EN_STAT);
+		case BQ2415X_CHARGE_STATUS:
+			return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS, BQ2415X_MASK_STAT, BQ2415X_SHIFT_STAT);
+		case BQ2415X_BOOST_STATUS:
+			return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS, BQ2415X_BIT_BOOST);
+		case BQ2415X_FAULT_STATUS:
+			return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS, BQ2415X_MASK_FAULT, BQ2415X_SHIFT_FAULT);
+
+		case BQ2415X_CHARGE_CURRENT_TERMINATION_STATUS:
+			return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL, BQ2415X_BIT_TE);
+		case BQ2415X_CHARGE_CURRENT_TERMINATION_ENABLE:
+			return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, 1, BQ2415X_BIT_TE);
+		case BQ2415X_CHARGE_CURRENT_TERMINATION_DISABLE:
+			return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, 0, BQ2415X_BIT_TE);
+		case BQ2415X_CHARGER_STATUS:
+			return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL, BQ2415X_BIT_CE);
+		case BQ2415X_CHARGER_ENABLE:
+			return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, 1, BQ2415X_BIT_CE);
+		case BQ2415X_CHARGER_DISABLE:
+			return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, 0, BQ2415X_BIT_CE);
+		case BQ2415X_HIGH_IMPEDANCE_STATUS:
+			return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL, BQ2415X_BIT_HZ_MODE);
+		case BQ2415X_HIGH_IMPEDANCE_ENABLE:
+			return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, 1, BQ2415X_BIT_HZ_MODE);
+		case BQ2415X_HIGH_IMPEDANCE_DISABLE:
+			return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, 0, BQ2415X_BIT_HZ_MODE);
+		case BQ2415X_MODE:
+			return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL, BQ2415X_BIT_OPA_MODE);
+		case BQ2415X_SET_BOOST_MODE:
+			return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, 1, BQ2415X_BIT_OPA_MODE);
+		case BQ2415X_SET_CHARGER_MODE:
+			return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, 0, BQ2415X_BIT_OPA_MODE);
+
+		case BQ2415X_OTG_HIGH_STATUS:
+			return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE, BQ2415X_BIT_OTG_PL);
+		case BQ2415X_OTG_HIGH_ACTIVATE:
+			return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE, 1, BQ2415X_BIT_OTG_PL);
+		case BQ2415X_OTG_LOW_ACTIVATE:
+			return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE, 0, BQ2415X_BIT_OTG_PL);
+		case BQ2415X_OTG_PIN_STATUS:
+			return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE, BQ2415X_BIT_OTG_EN);
+		case BQ2415X_OTG_PIN_ENABLE:
+			return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE, 1, BQ2415X_BIT_OTG_EN);
+		case BQ2415X_OTG_PIN_DISABLE:
+			return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE, 0, BQ2415X_BIT_OTG_EN);
+
+		case BQ2415X_VENDER_CODE:
+			return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER, BQ2415X_MASK_VENDER, BQ2415X_SHIFT_VENDER);
+		case BQ2415X_PART_NUMBER:
+			return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER, BQ2415X_MASK_PN, BQ2415X_SHIFT_PN);
+		case BQ2415X_REVISION:
+			return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER, BQ2415X_MASK_REVISION, BQ2415X_SHIFT_REVISION);
+
+		default:
+			return -EINVAL;
+	}
+}
+EXPORT_SYMBOL_GPL(bq2415x_exec_command);
+
+/* global other functions */
+
+#define bq2415x_set_default_value(bq, value) \
+	do { \
+		int ret = 0; \
+		if (bq->platform_data->value != -1) \
+			ret = bq2415x_set_##value(bq, bq->platform_data->value); \
+		if (ret < 0) \
+			return ret; \
+	} while (0)
+
+int bq2415x_set_defaults(struct bq2415x_device *bq)
+{
+	bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE);
+	bq2415x_set_default_value(bq, current_limit);
+	bq2415x_set_default_value(bq, weak_battery_voltage);
+	bq2415x_set_default_value(bq, battery_regulation_voltage);
+	bq2415x_set_default_value(bq, charge_current_sense_voltage);
+	bq2415x_set_default_value(bq, termination_current_sense_voltage);
+	bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(bq2415x_set_defaults);
+
+#undef bq2415x_set_default_value
+
+void bq2415x_reset_chip(struct bq2415x_device *bq)
+{
+	bq2415x_i2c_write(bq, BQ2415X_REG_CURRENT, BQ2415X_RESET_CURRENT);
+	bq2415x_i2c_write(bq, BQ2415X_REG_VOLTAGE, BQ2415X_RESET_VOLTAGE);
+	bq2415x_i2c_write(bq, BQ2415X_REG_CONTROL, BQ2415X_RESET_CONTROL);
+	bq2415x_i2c_write(bq, BQ2415X_REG_STATUS, BQ2415X_RESET_STATUS);
+}
+EXPORT_SYMBOL_GPL(bq2415x_reset_chip);
+
+int bq2415x_set_current_limit(struct bq2415x_device *bq, int mA)
+{
+	int val = (mA/100 + (mA%100 > 0 ? 1 : 0) - 1) / 4;
+
+	if (val < 0)
+		val = 0;
+
+	if (val > 3)
+		val = 3;
+
+	return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val, BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT);
+}
+EXPORT_SYMBOL_GPL(bq2415x_set_current_limit);
+
+int bq2415x_get_current_limit(struct bq2415x_device *bq)
+{
+	int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL, BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT);
+	if (ret < 0)
+		return ret;
+	else
+		return 100 * (1 + 4*ret);
+}
+EXPORT_SYMBOL_GPL(bq2415x_get_current_limit);
+
+int bq2415x_set_weak_battery_voltage(struct bq2415x_device *bq, int mV)
+{
+	int val = mV/100 + (mV%100 > 0 ? 1 : 0) - 34;
+
+	if (val < 0)
+		val = 0;
+
+	if (val > 3)
+		return -EINVAL;
+
+	return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val, BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
+}
+EXPORT_SYMBOL_GPL(bq2415x_set_weak_battery_voltage);
+
+int bq2415x_get_weak_battery_voltage(struct bq2415x_device *bq)
+{
+	int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL, BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
+	if (ret < 0)
+		return ret;
+	else
+		return 100 * (34 + ret);
+}
+EXPORT_SYMBOL_GPL(bq2415x_get_weak_battery_voltage);
+
+int bq2415x_set_battery_regulation_voltage(struct bq2415x_device *bq, int mV)
+{
+	int val = mV/10 + (mV%10 > 0 ? 1 : 0) - 350;
+
+	if (val < 0)
+		val = 0;
+
+	if (val > 94) /* FIXME: Max is 94 or 122 ? */
+		return -EINVAL;
+
+	return bq2415x_i2c_write_mask(bq, BQ2415X_REG_VOLTAGE, val, BQ2415X_MASK_VO, BQ2415X_SHIFT_VO);
+}
+EXPORT_SYMBOL_GPL(bq2415x_set_battery_regulation_voltage);
+
+int bq2415x_get_battery_regulation_voltage(struct bq2415x_device *bq)
+{
+	int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_VOLTAGE, BQ2415X_MASK_VO, BQ2415X_SHIFT_VO);
+	if (ret < 0)
+		return ret;
+	else
+		return 10 * (350 + ret);
+}
+EXPORT_SYMBOL_GPL(bq2415x_get_battery_regulation_voltage);
+
+int bq2415x_set_charge_current_sense_voltage(struct bq2415x_device *bq, int mV)
+{
+	/* TODO */
+	return -1;
+}
+EXPORT_SYMBOL_GPL(bq2415x_set_charge_current_sense_voltage);
+
+int bq2415x_get_charge_current_sense_voltage(struct bq2415x_device *bq)
+{
+	/* TODO */
+	return -1;
+}
+EXPORT_SYMBOL_GPL(bq2415x_get_charge_current_sense_voltage);
+
+int bq2415x_set_termination_current_sense_voltage(struct bq2415x_device *bq, int mV)
+{
+	/* TODO */
+	return -1;
+}
+EXPORT_SYMBOL_GPL(bq2415x_set_termination_current_sense_voltage);
+
+int bq2415x_get_termination_current_sense_voltage(struct bq2415x_device *bq)
+{
+	/* TODO */
+	return -1;
+}
+EXPORT_SYMBOL_GPL(bq2415x_get_termination_current_sense_voltage);
+
+/* current limit regulator */
+
+static int bq2415x_regulator_set_current_limit(struct regulator_dev *rdev, int min_uA, int max_uA)
+{
+	struct bq2415x_device *bq = rdev_get_drvdata(rdev);
+	return bq2415x_set_current_limit(bq, min_uA / 1000);
+}
+
+static int bq2415x_regulator_get_current_limit(struct regulator_dev *rdev)
+{
+	struct bq2415x_device *bq = rdev_get_drvdata(rdev);
+	return bq2415x_get_current_limit(bq) * 1000;
+}
+
+struct regulator_ops bq2415x_regulator_current_limit = {
+	.set_current_limit = bq2415x_regulator_set_current_limit,
+	.get_current_limit = bq2415x_regulator_get_current_limit,
+};
+
+/* weak battery voltage regulator */
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
+static int bq2415x_regulator_list_weak_battery_voltage(struct regulator_dev *rdev, unsigned selector)
+{
+	if (selector > 3)
+		return 0;
+	else
+		return 100000 * (34 + selector);
+}
+#endif
+
+static int bq2415x_regulator_set_weak_battery_voltage(struct regulator_dev *rdev, int min_uV, int max_uV
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
+		, unsigned *selector
+#endif
+		)
+{
+	struct bq2415x_device *bq = rdev_get_drvdata(rdev);
+	return bq2415x_set_weak_battery_voltage(bq, min_uV / 1000);
+}
+
+static int bq2415x_regulator_get_weak_battery_voltage(struct regulator_dev *rdev)
+{
+	struct bq2415x_device *bq = rdev_get_drvdata(rdev);
+	return bq2415x_get_weak_battery_voltage(bq) * 1000;
+}
+
+static struct regulator_ops bq2415x_regulator_weak_battery_voltage = {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
+	.list_voltage = bq2415x_regulator_list_weak_battery_voltage,
+#endif
+	.set_voltage = bq2415x_regulator_set_weak_battery_voltage,
+	.get_voltage = bq2415x_regulator_get_weak_battery_voltage,
+};
+
+/* battery regulation voltage regulator */
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
+static int bq2415x_regulator_list_battery_regulation_voltage(struct regulator_dev *rdev, unsigned selector)
+{
+	if (selector > 94) /* FIXME: Max is 94 or 122 ? */
+		return 0;
+	else
+		return 10000 * (350 + selector);
+}
+#endif
+
+static int bq2415x_regulator_set_battery_regulation_voltage(struct regulator_dev *rdev, int min_uV, int max_uV
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
+		, unsigned *selector
+#endif
+		)
+{
+	struct bq2415x_device *bq = rdev_get_drvdata(rdev);
+	return bq2415x_set_battery_regulation_voltage(bq, min_uV / 1000);
+}
+
+static int bq2415x_regulator_get_battery_regulation_voltage(struct regulator_dev *rdev)
+{
+	struct bq2415x_device *bq = rdev_get_drvdata(rdev);
+	return bq2415x_get_battery_regulation_voltage(bq) * 1000;
+}
+
+static struct regulator_ops bq2415x_regulator_battery_regulation_voltage = {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
+	.list_voltage = bq2415x_regulator_list_battery_regulation_voltage,
+#endif
+	.set_voltage = bq2415x_regulator_set_battery_regulation_voltage,
+	.get_voltage = bq2415x_regulator_get_battery_regulation_voltage,
+};
+
+/* charge current sense voltage regulator */
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
+static int bq2415x_regulator_list_charge_current_sense_voltage(struct regulator_dev *rdev, unsigned selector)
+{
+	/* TODO */
+	return 0;
+}
+#endif
+
+static int bq2415x_regulator_set_charge_current_sense_voltage(struct regulator_dev *rdev, int min_uV, int max_uV
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
+		, unsigned *selector
+#endif
+		)
+{
+	struct bq2415x_device *bq = rdev_get_drvdata(rdev);
+	return bq2415x_set_charge_current_sense_voltage(bq, min_uV / 1000);
+}
+
+static int bq2415x_regulator_get_charge_current_sense_voltage(struct regulator_dev *rdev)
+{
+	struct bq2415x_device *bq = rdev_get_drvdata(rdev);
+	return bq2415x_get_charge_current_sense_voltage(bq) * 1000;
+}
+
+static struct regulator_ops bq2415x_regulator_charge_current_sense_voltage = {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
+	.list_voltage = bq2415x_regulator_list_charge_current_sense_voltage,
+#endif
+	.set_voltage = bq2415x_regulator_set_charge_current_sense_voltage,
+	.get_voltage = bq2415x_regulator_get_charge_current_sense_voltage,
+};
+
+/* termination current sense voltage regulator */
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
+static int bq2415x_regulator_list_termination_current_sense_voltage(struct regulator_dev *rdev, unsigned selector)
+{
+	/* TODO */
+	return 0;
+}
+#endif
+
+static int bq2415x_regulator_set_termination_current_sense_voltage(struct regulator_dev *rdev, int min_uV, int max_uV
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
+		, unsigned *selector
+#endif
+		)
+{
+	struct bq2415x_device *bq = rdev_get_drvdata(rdev);
+	return bq2415x_set_termination_current_sense_voltage(bq, min_uV / 1000);
+}
+
+static int bq2415x_regulator_get_termination_current_sense_voltage(struct regulator_dev *rdev)
+{
+	struct bq2415x_device *bq = rdev_get_drvdata(rdev);
+	return bq2415x_get_termination_current_sense_voltage(bq) * 1000;
+}
+
+static int bq2415x_regulator_enable_termination_current_sense_voltage(struct regulator_dev *rdev)
+{
+	struct bq2415x_device *bq = rdev_get_drvdata(rdev);
+	return bq2415x_exec_command(bq, BQ2415X_CHARGE_CURRENT_TERMINATION_ENABLE);
+}
+
+static int bq2415x_regulator_disable_termination_current_sense_voltage(struct regulator_dev *rdev)
+{
+	struct bq2415x_device *bq = rdev_get_drvdata(rdev);
+	return bq2415x_exec_command(bq, BQ2415X_CHARGE_CURRENT_TERMINATION_DISABLE);
+}
+
+static int bq2415x_regulator_is_enabled_termination_current_sense_voltage(struct regulator_dev *rdev)
+{
+	struct bq2415x_device *bq = rdev_get_drvdata(rdev);
+	return bq2415x_exec_command(bq, BQ2415X_CHARGE_CURRENT_TERMINATION_STATUS);
+}
+
+static struct regulator_ops bq2415x_regulator_termination_current_sense_voltage = {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
+	.list_voltage = bq2415x_regulator_list_termination_current_sense_voltage,
+#endif
+	.set_voltage = bq2415x_regulator_set_termination_current_sense_voltage,
+	.get_voltage = bq2415x_regulator_get_termination_current_sense_voltage,
+	.enable = bq2415x_regulator_enable_termination_current_sense_voltage,
+	.disable = bq2415x_regulator_disable_termination_current_sense_voltage,
+	.is_enabled = bq2415x_regulator_is_enabled_termination_current_sense_voltage,
+};
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
+#define regulator_register2(desc, dev, init, data) regulator_register(desc, dev, init, data)
+#else
+#define regulator_register2(desc, dev, init, data) regulator_register(desc, dev, data)
+#endif
+
+#define bq2415x_regulator_register(bq, rname, rid, rtype) \
+	do { \
+		bq->rname.desc.name = __stringify(rname); \
+		bq->rname.desc.id = rid; \
+		bq->rname.desc.type = rtype; \
+		bq->rname.desc.owner = THIS_MODULE; \
+		bq->rname.desc.ops = &bq2415x_regulator_##rname; \
+		bq->rname.dev = regulator_register2(&bq->rname.desc, bq->dev, NULL, bq); \
+		if (IS_ERR(bq->rname.dev)) \
+			return PTR_ERR(bq->rname.dev); \
+	} while (0)
+
+#define bq2415x_regulator_unregister(bq, rname) regulator_unregister(bq->rname.dev)
+
+static int bq2415x_regulator_init(struct bq2415x_device *bq)
+{
+/*	bq2415x_regulator_register(bq, current_limit, 0, REGULATOR_CURRENT);
+	bq2415x_regulator_register(bq, weak_battery_voltage, 1, REGULATOR_VOLTAGE);
+	bq2415x_regulator_register(bq, battery_regulation_voltage, 2, REGULATOR_VOLTAGE);
+	bq2415x_regulator_register(bq, charge_current_sense_voltage, 3, REGULATOR_VOLTAGE);
+	bq2415x_regulator_register(bq, ermination_current_sense_voltage, 4, REGULATOR_VOLTAGE);*/
+	return 0;
+}
+
+static void bq2415x_regulator_exit(struct bq2415x_device *bq)
+{
+/*	bq2415x_regulator_unregister(bq, current_limit);
+	bq2415x_regulator_unregister(bq, weak_battery_voltage);
+	bq2415x_regulator_unregister(bq, battery_regulation_voltage);
+	bq2415x_regulator_unregister(bq, charge_current_sense_voltage);
+	bq2415x_regulator_unregister(bq, termination_current_sense_voltage);*/
+}
+
+#undef bq2415x_regulator_register
+#undef bq2415x_regulator_unregister
+
+/* power supply */
+
+static enum power_supply_property bq2415x_power_supply_props[] = {
+	/* TODO */
+	POWER_SUPPLY_PROP_STATUS,
+};
+
+static void bq2415x_power_supply_work(struct work_struct *work)
+{
+	struct bq2415x_device *bq = container_of(work, struct bq2415x_device, work.work);
+	int ret;
+
+	dev_info(bq->dev, "bq2415x_power_supply_work\n");
+
+	if (bq->watchdog != 1)
+		return;
+
+	ret = bq2415x_exec_command(bq, BQ2415X_WATCHDOG_RESET);
+	if (ret < 0)
+		bq->watchdog = ret;
+
+	if (bq->watchdog != 1)
+		return;
+
+	/* TODO charge */
+
+	schedule_delayed_work(&bq->work, BQ2415X_WATCHDOG_TIMEOUT * HZ);
+}
+
+static void bq2415x_power_supply_update_watchdog(struct bq2415x_device *bq, int auto_enable)
+{
+	if (auto_enable && bq->watchdog == 1)
+		return;
+
+	if (!auto_enable && bq->watchdog == 0)
+		return;
+
+	if (auto_enable) {
+		bq->watchdog = 1;
+		schedule_delayed_work(&bq->work, BQ2415X_WATCHDOG_TIMEOUT * HZ);
+		bq2415x_exec_command(bq, BQ2415X_WATCHDOG_RESET);
+	} else {
+		bq->watchdog = 0;
+		cancel_delayed_work_sync(&bq->work);
+	}
+}
+
+static int bq2415x_power_supply_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val)
+{
+	struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, charger);
+	/* TODO */
+	return -EINVAL;
+}
+
+static int bq2415x_power_supply_init(struct bq2415x_device *bq)
+{
+	int ret;
+
+	bq->charger.name = bq->name;
+	bq->charger.type = POWER_SUPPLY_TYPE_USB;
+	bq->charger.properties = bq2415x_power_supply_props;
+	bq->charger.num_properties = ARRAY_SIZE(bq2415x_power_supply_props);
+	bq->charger.get_property = bq2415x_power_supply_get_property;
+
+	ret = power_supply_register(bq->dev, &bq->charger);
+	if (ret)
+		return ret;
+
+	INIT_DELAYED_WORK(&bq->work, bq2415x_power_supply_work);
+
+	bq2415x_power_supply_update_watchdog(bq, 1);
+	return ret;
+}
+
+static void bq2415x_power_supply_exit(struct bq2415x_device *bq)
+{
+	bq->watchdog = 0;
+	cancel_delayed_work_sync(&bq->work);
+	power_supply_unregister(&bq->charger);
+}
+
+/* sysfs files */
+
+static ssize_t bq2415x_sysfs_show_status(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct power_supply *psy = dev_get_drvdata(dev);
+	struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, charger);
+	enum bq2415x_command command;
+	int ret;
+
+	if (strcmp(attr->attr.name, "otg_status") == 0)
+		command = BQ2415X_OTG_STATUS;
+	else if (strcmp(attr->attr.name, "charge_status") == 0)
+		command = BQ2415X_CHARGE_STATUS;
+	else if (strcmp(attr->attr.name, "boost_status") == 0)
+		command = BQ2415X_BOOST_STATUS;
+	else if (strcmp(attr->attr.name, "fault_status") == 0)
+		command = BQ2415X_FAULT_STATUS;
+	else
+		return -EINVAL;
+
+	ret = bq2415x_exec_command(bq, command);
+	if (ret < 0)
+		return ret;
+	else
+		return sprintf(buf, "%d\n", ret);
+}
+
+static ssize_t bq2415x_sysfs_set_watchdog(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct power_supply *psy = dev_get_drvdata(dev);
+	struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, charger);
+	int ret = 0;
+
+	if (strncmp(buf, "auto", 4) == 0)
+		bq2415x_power_supply_update_watchdog(bq, 1);
+	else if (strncmp(buf, "off", 3) == 0)
+		bq2415x_power_supply_update_watchdog(bq, 0);
+	else
+		ret = bq2415x_exec_command(bq, BQ2415X_WATCHDOG_RESET);
+
+	if (ret < 0)
+		return ret;
+	else
+		return count;
+}
+
+static ssize_t bq2415x_sysfs_show_watchdog(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct power_supply *psy = dev_get_drvdata(dev);
+	struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, charger);
+
+	switch (bq->watchdog) {
+		case 1: return sprintf(buf, "auto\n");
+		case 0: return sprintf(buf, "off\n");
+		default: return sprintf(buf, "error %d\n", bq->watchdog);
+	}
+}
+
+/* TODO: Add other sysfs entries */
+
+static DEVICE_ATTR(watchdog, S_IWUSR | S_IRUGO, bq2415x_sysfs_show_watchdog, bq2415x_sysfs_set_watchdog);
+static DEVICE_ATTR(otg_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
+static DEVICE_ATTR(charge_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
+static DEVICE_ATTR(boost_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
+static DEVICE_ATTR(fault_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
+
+static struct attribute *bq2415x_sysfs_attributes[] = {
+	&dev_attr_watchdog.attr,
+	&dev_attr_otg_status.attr,
+	&dev_attr_charge_status.attr,
+	&dev_attr_boost_status.attr,
+	&dev_attr_fault_status.attr,
+	NULL,
+};
+
+static const struct attribute_group bq2415x_sysfs_attr_group = {
+	.attrs = bq2415x_sysfs_attributes,
+};
+
+static int bq2415x_sysfs_init(struct bq2415x_device *bq)
+{
+	return sysfs_create_group(&bq->charger.dev->kobj, &bq2415x_sysfs_attr_group);
+}
+
+static void bq2415x_sysfs_exit(struct bq2415x_device *bq)
+{
+	sysfs_remove_group(&bq->charger.dev->kobj, &bq2415x_sysfs_attr_group);
+}
+
+/* charger led device on STAT_PIN */
+
+static void bq2415x_led_set(struct led_classdev *led_cdev, enum led_brightness value)
+{
+	struct i2c_client *client = to_i2c_client(led_cdev->dev->parent);
+	struct bq2415x_device *bq = i2c_get_clientdata(client);
+
+	if (value)
+		bq2415x_exec_command(bq, BQ2415X_STAT_PIN_ENABLE);
+	else
+		bq2415x_exec_command(bq, BQ2415X_STAT_PIN_DISABLE);
+}
+
+static enum led_brightness bq2415x_led_get(struct led_classdev *led_cdev)
+{
+	struct i2c_client *client = to_i2c_client(led_cdev->dev->parent);
+	struct bq2415x_device *bq = i2c_get_clientdata(client);
+
+	if (bq2415x_exec_command(bq, BQ2415X_STAT_PIN_STATUS) > 0)
+		return LED_FULL;
+	else
+		return LED_OFF;
+}
+
+static int bq2415x_led_init(struct bq2415x_device *bq)
+{
+	bq->led.name = bq->name;
+	bq->led.brightness_set = bq2415x_led_set;
+	bq->led.brightness_get = bq2415x_led_get;
+	return led_classdev_register(bq->dev, &bq->led);
+}
+
+static void bq2415x_led_exit(struct bq2415x_device *bq)
+{
+	led_classdev_unregister(&bq->led);
+}
+
+/* bq2415x register */
+
+static int bq2415x_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+	int ret;
+	int num;
+	char *name;
+	struct bq2415x_device *bq;
+
+	if (!client->dev.platform_data) {
+		dev_err(&client->dev, "platform data not set\n");
+		return -ENODEV;
+	}
+
+	/* Get new ID for the new device */
+	ret = idr_pre_get(&bq2415x_id, GFP_KERNEL);
+	if (ret == 0)
+		return -ENOMEM;
+
+	mutex_lock(&bq2415x_mutex);
+	ret = idr_get_new(&bq2415x_id, client, &num);
+	mutex_unlock(&bq2415x_mutex);
+
+	if (ret < 0)
+		return ret;
+
+	name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num);
+	if (!name) {
+		dev_err(&client->dev, "failed to allocate device name\n");
+		ret = -ENOMEM;
+		goto error_1;
+	}
+
+	bq = kzalloc(sizeof(*bq), GFP_KERNEL);
+	if (!bq) {
+		dev_err(&client->dev, "failed to allocate device data\n");
+		ret = -ENOMEM;
+		goto error_2;
+	}
+
+	i2c_set_clientdata(client, bq);
+
+	bq->id = num;
+	bq->dev = &client->dev;
+	bq->chip = id->driver_data;
+	bq->name = name;
+	bq->platform_data = client->dev.platform_data;
+	bq->watchdog = 0;
+
+	bq2415x_reset_chip(bq);
+
+	ret = bq2415x_regulator_init(bq);
+	if (ret) {
+		dev_err(bq->dev, "failed to register regulators: %d\n", ret);
+		goto error_3;
+	}
+
+	ret = bq2415x_led_init(bq);
+	if (ret) {
+		dev_err(bq->dev, "failed to register led device: %d\n", ret);
+		goto error_4;
+	}
+
+	ret = bq2415x_power_supply_init(bq);
+	if (ret) {
+		dev_err(bq->dev, "failed to register power supply: %d\n", ret);
+		goto error_5;
+	}
+
+	ret = bq2415x_sysfs_init(bq);
+	if (ret) {
+		dev_err(bq->dev, "failed to create sysfs entries: %d\n", ret);
+		goto error_6;
+	}
+
+	bq2415x_set_defaults(bq);
+
+	dev_info(bq->dev, "driver registred\n");
+	return 0;
+
+/*error_7:*/
+	bq2415x_sysfs_exit(bq);
+error_6:
+	bq2415x_power_supply_exit(bq);
+error_5:
+	bq2415x_led_exit(bq);
+error_4:
+	bq2415x_regulator_exit(bq);
+error_3:
+	kfree(bq);
+error_2:
+	kfree(name);
+error_1:
+	mutex_lock(&bq2415x_mutex);
+	idr_remove(&bq2415x_id, num);
+	mutex_unlock(&bq2415x_mutex);
+
+	return ret;
+}
+
+/* bq2415x unregister */
+
+static int bq2415x_remove(struct i2c_client *client)
+{
+	struct bq2415x_device *bq = i2c_get_clientdata(client);
+
+	bq2415x_sysfs_exit(bq);
+	bq2415x_power_supply_exit(bq);
+	bq2415x_led_exit(bq);
+	bq2415x_regulator_exit(bq);
+
+	bq2415x_reset_chip(bq);
+
+	mutex_lock(&bq2415x_mutex);
+	idr_remove(&bq2415x_id, bq->id);
+	mutex_unlock(&bq2415x_mutex);
+
+	dev_info(bq->dev, "driver unregistred\n");
+
+	kfree(bq->name);
+	kfree(bq);
+
+	return 0;
+}
+
+static const struct i2c_device_id bq2415x_i2c_id_table[] = {
+	{ "bq2415x", BQUNKNOWN },
+	{ "bq24150", BQ24150 },
+	{ "bq24150a", BQ24150A },
+	{ "bq24151", BQ24151 },
+	{ "bq24151a", BQ24151A },
+	{ "bq24152", BQ24152 },
+	{ "bq24153", BQ24153 },
+	{ "bq24153a", BQ24153A },
+	{ "bq24155", BQ24155 },
+	{ "bq24156", BQ24156 },
+	{ "bq24156a", BQ24156A },
+	{ "bq24158", BQ24158 },
+	{},
+};
+MODULE_DEVICE_TABLE(i2c, bq2415x_i2c_id_table);
+
+static struct i2c_driver bq2415x_driver = {
+	.driver = {
+		.name = "bq2415x-charger",
+	},
+	.probe = bq2415x_probe,
+	.remove = bq2415x_remove,
+	.id_table = bq2415x_i2c_id_table,
+};
+
+/* BEGIN: Temporary RX51 hack TODO: move to board-rx51.c */
+static struct bq2415x_platform_data rx51_platform_data = {
+	.current_limit = 100, /* mA */
+	.weak_battery_voltage = 3400, /* mV */
+	.battery_regulation_voltage = 4200, /* mV */
+	.charge_current_sense_voltage = -1, /* TODO */
+	.termination_current_sense_voltage = -1, /* TODO */
+};
+static struct i2c_board_info rx51_board_info = {
+	I2C_BOARD_INFO("bq24150", 0x6b),
+	.platform_data = &rx51_platform_data,
+};
+static struct i2c_client *client;
+/* END */
+
+static int __init bq2415x_init(void)
+{
+	/* BEGIN: Temporary RX51 hack TODO: move to board-rx51.c */
+	client = i2c_new_device(i2c_get_adapter(2), &rx51_board_info);
+	/* END */
+
+	return i2c_add_driver(&bq2415x_driver);
+}
+module_init(bq2415x_init);
+
+static void __exit bq2415x_exit(void)
+{
+	/* BEGIN: Temporary RX51 hack TODO: move to board-rx51.c */
+	i2c_unregister_device(client);
+	/* END */
+
+	i2c_del_driver(&bq2415x_driver);
+}
+module_exit(bq2415x_exit);
+
+MODULE_AUTHOR("Pali Rohár <pali.rohar@xxxxxxxxx>");
+MODULE_DESCRIPTION("bq2415x charger driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/power/bq2415x_charger.h b/drivers/power/bq2415x_charger.h
new file mode 100644
index 0000000..de0ec02
--- /dev/null
+++ b/drivers/power/bq2415x_charger.h
@@ -0,0 +1,97 @@
+/*
+    bq2415x_charger.h - bq2415x charger driver
+    Copyright (C) 2011  Pali Rohár <pali.rohar@xxxxxxxxx>
+
+    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, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#ifndef BQ2415X_CHARGER_H
+#define BQ2415X_CHARGER_H
+
+struct bq2415x_device;
+
+struct bq2415x_platform_data {
+	int current_limit;
+	int weak_battery_voltage;
+	int battery_regulation_voltage;
+	int charge_current_sense_voltage;
+	int termination_current_sense_voltage;
+};
+
+enum bq2415x_command {
+	BQ2415X_WATCHDOG_RESET,
+	BQ2415X_OTG_STATUS,
+	BQ2415X_STAT_PIN_STATUS,
+	BQ2415X_STAT_PIN_ENABLE,
+	BQ2415X_STAT_PIN_DISABLE,
+	BQ2415X_CHARGE_STATUS,
+	BQ2415X_BOOST_STATUS,
+	BQ2415X_FAULT_STATUS,
+
+	BQ2415X_CHARGE_CURRENT_TERMINATION_STATUS,
+	BQ2415X_CHARGE_CURRENT_TERMINATION_ENABLE,
+	BQ2415X_CHARGE_CURRENT_TERMINATION_DISABLE,
+	BQ2415X_CHARGER_STATUS,
+	BQ2415X_CHARGER_ENABLE,
+	BQ2415X_CHARGER_DISABLE,
+	BQ2415X_HIGH_IMPEDANCE_STATUS,
+	BQ2415X_HIGH_IMPEDANCE_ENABLE,
+	BQ2415X_HIGH_IMPEDANCE_DISABLE,
+	BQ2415X_MODE,
+	BQ2415X_SET_BOOST_MODE,
+	BQ2415X_SET_CHARGER_MODE,
+
+	BQ2415X_OTG_HIGH_STATUS,
+	BQ2415X_OTG_HIGH_ACTIVATE,
+	BQ2415X_OTG_LOW_ACTIVATE,
+	BQ2415X_OTG_PIN_STATUS,
+	BQ2415X_OTG_PIN_ENABLE,
+	BQ2415X_OTG_PIN_DISABLE,
+
+	BQ2415X_VENDER_CODE,
+	BQ2415X_PART_NUMBER,
+	BQ2415X_REVISION,
+};
+
+enum bq2415x_chip {
+	BQUNKNOWN,
+	BQ24150,
+	BQ24150A,
+	BQ24151,
+	BQ24151A,
+	BQ24152,
+	BQ24153,
+	BQ24153A,
+	BQ24155,
+	BQ24156,
+	BQ24156A,
+	BQ24158,
+};
+
+enum bq2415x_chip bq2415x_detect_chip(struct bq2415x_device *bq);
+int bq2415x_exec_command(struct bq2415x_device *bq, enum bq2415x_command command);
+int bq2415x_set_defaults(struct bq2415x_device *bq);
+int bq2415x_set_current_limit(struct bq2415x_device *bq, int uA);
+int bq2415x_get_current_limit(struct bq2415x_device *bq);
+int bq2415x_set_weak_battery_voltage(struct bq2415x_device *bq, int mV);
+int bq2415x_get_weak_battery_voltage(struct bq2415x_device *bq);
+int bq2415x_set_battery_regulation_voltage(struct bq2415x_device *bq, int mV);
+int bq2415x_get_battery_regulation_voltage(struct bq2415x_device *bq);
+int bq2415x_set_charge_current_sense_voltage(struct bq2415x_device *bq, int mV);
+int bq2415x_get_charge_current_sense_voltage(struct bq2415x_device *bq);
+int bq2415x_set_termination_current_sense_voltage(struct bq2415x_device *bq, int mV);
+int bq2415x_get_termination_current_sense_voltage(struct bq2415x_device *bq);
+
+#endif


--
Pali Rohár
pali.rohar@xxxxxxxxx

Attachment: signature.asc
Description: This is a digitally signed message part.


[Index of Archives]     [Linux Arm (vger)]     [ARM Kernel]     [ARM MSM]     [Linux Tegra]     [Linux WPAN Networking]     [Linux Wireless Networking]     [Maemo Users]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Trails]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux