[Tablet] BMA180 Accelerometer:Port BMA180 k35 driver to k3.0

Port BMA180 k35 driver to k3.0

Change-Id: Ic018de4ae42db15ff50834fe726d2a77e9618678
Signed-off-by: Arthur Philpott <arthur.philpott@ti.com>

Conflicts:
	drivers/input/misc/Kconfig

4 files changed, 911 insertions, 0 deletions

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 436ca93..a822b61 100755
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -541,6 +541,13 @@ config OPTICAL_GP2A
 	help
 	  This option enables proximity & light sensors using gp2a driver.
 
+config INPUT_BMA180
+	bool "BMA-180 Tri-axis accelerometer"
+	depends on I2C && SYSFS
+	help
+	  Say Y here if you want to use BMA-180 Tri-axis accelerometer
+	  through I2C interface.
+
 config INPUT_MPU3050
 	bool "MPU-3050 Tri-axis gyroscope"
 	depends on I2C && SYSFS
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 182cbd5..93d86b7 100755
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -53,5 +53,6 @@ obj-$(CONFIG_INPUT_YEALINK)		+= yealink.o
 obj-$(CONFIG_OPTICAL_GP2A)		+= gp2a.o
 obj-$(CONFIG_INPUT_HMC5843)		+= hmc5843.o
 obj-$(CONFIG_INPUT_SFH7741)		+= sfh7741.o
+obj-$(CONFIG_INPUT_BMA180)		+= bma180.o
 obj-$(CONFIG_INPUT_MPU3050)		+= mpu3050.o
 obj-$(CONFIG_INPUT_TSL2771)		+= tsl2771.o
diff --git a/drivers/input/misc/bma180.c b/drivers/input/misc/bma180.c
new file mode 100644
index 0000000..1b8f86c
--- /dev/null
+++ b/drivers/input/misc/bma180.c
@@ -0,0 +1,831 @@
+/*
+ * bma180.c
+ * BMA-180 Accelerometer driver
+ *
+ * Copyright (C) 2010 Texas Instruments
+ * Author: Dan Murphy <Dmurphy@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License 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.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Derived work from bma180_accl.c from Jorge Bustamante <jbustamante@ti.com>
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/input.h>
+#include <linux/workqueue.h>
+#include <linux/i2c.h>
+#include <linux/i2c/bma180.h>
+#include <linux/gpio.h>
+
+#define BMA180_DEBUG 1
+
+#define DEVICE_NAME "bma180"
+#define DRIVER_NAME "bma180_accel"
+
+#define BMA180_OFFSET_Z			0x3A
+#define BMA180_OFFSET_Y			0x39
+#define BMA180_OFFSET_X			0x38
+#define BMA180_OFFSET_T			0x37
+#define BMA180_OFFSET_LSB2		0x36
+#define BMA180_OFFSET_LSB1		0x35
+#define BMA180_GAIN_Z			0x34
+#define BMA180_GAIN_Y			0x33
+#define BMA180_GAIN_X			0x32
+#define BMA180_GAIN_T			0x31
+#define BMA180_TCO_Z			0x30
+#define BMA180_TCO_Y			0x2F
+#define BMA180_TCO_X			0x2E
+#define BMA180_CD2			0x2D
+#define BMA180_CD1			0x2C
+#define BMA180_SLOPE_TH			0x2B
+#define BMA180_HIGH_TH			0x2A
+#define BMA180_LOW_TH			0x29
+#define BMA180_TAPSENS_TH		0x28
+#define BMA180_HIGH_DUR			0x27
+#define BMA180_LOW_DUR			0x26
+#define BMA180_HIGH_LOW_INFO		0x25
+#define BMA180_SLOPE_TAPSENS_INFO	0x24
+#define BMA180_HY			0x23
+#define BMA180_CTRL_REG4		0x22
+#define BMA180_CTRL_REG3		0x21
+#define BMA180_BW_TCS			0x20
+#define BMA180_RESET			0x10
+#define BMA180_CTRL_REG2		0x0F
+#define BMA180_CTRL_REG1		0x0E
+#define BMA180_CTRL_REG0		0x0D
+#define BMA180_STATUS_REG4		0x0C
+#define BMA180_STATUS_REG3		0x0B
+#define BMA180_STATUS_REG2		0x0A
+#define BMA180_STATUS_REG1		0x09
+#define BMA180_TEMP			0x08
+#define BMA180_ACC_Z_MSB		0x07
+#define BMA180_ACC_Z_LSB		0x06
+#define BMA180_ACC_Y_MSB		0x05
+#define BMA180_ACC_Y_LSB		0x04
+#define BMA180_ACC_X_MSB		0x03
+#define BMA180_ACC_X_LSB		0x02
+#define BMA180_VERSION			0x01
+#define BMA180_CHIP_ID			0x00
+
+#define SLEEP				0x00
+#define WAKEUP				0x01
+
+struct bma180_accel_data {
+	struct bma180accel_platform_data *pdata;
+	struct i2c_client *client;
+	struct input_dev *input_dev;
+	struct delayed_work wq;
+	struct mutex mutex;
+
+	uint32_t def_poll_rate;
+	int wakeup_flag;
+};
+
+static uint32_t accl_debug;
+module_param_named(bma180_debug, accl_debug, uint, 0664);
+
+static int g_range_table[7] = {
+	1000,
+	1500,
+	2000,
+	3000,
+	4000,
+	8000,
+	16000,
+};
+
+/* interval between samples for the different rates, in msecs */
+static const unsigned int bma180_measure_interval[] = {
+	1000 / 10,  1000 / 20,  1000 / 40,  1000 / 75,
+	1000 / 150, 1000 / 300, 1000 / 600, 1000 / 1200
+};
+
+#ifdef BMA180_DEBUG
+struct bma180_reg {
+	const char *name;
+	uint8_t reg;
+	int writeable;
+} bma180_regs[] = {
+	{ "CHIP_ID",		BMA180_CHIP_ID, 0 },
+	{ "VERSION",		BMA180_VERSION, 0 },
+	{ "X_LSB",		BMA180_ACC_X_LSB, 0 },
+	{ "X_MSB",		BMA180_ACC_X_MSB, 0 },
+	{ "Y_LSB",		BMA180_ACC_Y_LSB, 0 },
+	{ "Y_MSB",		BMA180_ACC_Y_MSB, 0 },
+	{ "Z_LSB",		BMA180_ACC_Z_LSB, 0 },
+	{ "Z_MSB",		BMA180_ACC_Z_MSB, 0 },
+	{ "TEMP",		BMA180_TEMP, 0 },
+	{ "STATUS1",		BMA180_STATUS_REG1, 0 },
+	{ "STATUS2",		BMA180_STATUS_REG2, 0 },
+	{ "STATUS3",		BMA180_STATUS_REG3, 0 },
+	{ "STATUS4",		BMA180_STATUS_REG4, 0 },
+	{ "CTRL0",		BMA180_CTRL_REG0, 1 },
+	{ "CTRL1",		BMA180_CTRL_REG1, 1 },
+	{ "CTRL2",		BMA180_CTRL_REG2, 1 },
+	{ "RESET",		BMA180_RESET, 1 },
+	{ "BW_TCS",		BMA180_BW_TCS, 1 },
+	{ "CTRL3",		BMA180_CTRL_REG3, 1 },
+	{ "CTRL4",		BMA180_CTRL_REG4, 1 },
+	{ "HY",			BMA180_HY, 1 },
+	{ "TAP_INFO",		BMA180_SLOPE_TAPSENS_INFO, 1 },
+	{ "HI_LOW_INFO",	BMA180_HIGH_LOW_INFO, 1 },
+	{ "LOW_DUR",		BMA180_LOW_DUR, 1 },
+	{ "HIGH_DUR",		BMA180_HIGH_DUR, 1 },
+	{ "TAP_THRESH",		BMA180_TAPSENS_TH, 1 },
+	{ "LOW_THRESH",		BMA180_LOW_TH, 1 },
+	{ "HIGH_THRESH",	BMA180_HIGH_TH, 1 },
+	{ "SLOPE_THRESH",       BMA180_SLOPE_TH, 1 },
+	{ "CD1",		BMA180_CD1, 1 },
+	{ "CD2",		BMA180_CD2, 1 },
+	{ "TCO_X",		BMA180_TCO_X, 1 },
+	{ "TCO_Y",		BMA180_TCO_Y, 1 },
+	{ "TCO_Z",		BMA180_TCO_Z, 1 },
+	{ "GAIN_T",		BMA180_GAIN_T, 1 },
+	{ "GAIN_X",		BMA180_GAIN_X, 1 },
+	{ "GAIN_Y",		BMA180_GAIN_Y, 1 },
+	{ "GAIN_Z",		BMA180_GAIN_Z, 1 },
+	{ "OFFSET_LSB1",	BMA180_OFFSET_LSB1, 1 },
+	{ "OFFSET_LSB2",	BMA180_OFFSET_LSB2, 1 },
+	{ "OFFSET_T",		BMA180_OFFSET_T, 1 },
+	{ "OFFSET_X",		BMA180_OFFSET_X, 1 },
+	{ "OFFSET_Y",		BMA180_OFFSET_Y, 1 },
+	{ "OFFSET_Z",		BMA180_OFFSET_Z, 1 },
+};
+#endif
+
+static int bma180_write(struct bma180_accel_data *data, u8 reg, u8 val)
+{
+	int ret = 0;
+	mutex_lock(&data->mutex);
+	ret = i2c_smbus_write_byte_data(data->client, reg, val);
+	if (ret < 0)
+		dev_err(&data->client->dev,
+			"i2c_smbus_write_byte_data failed\n");
+	mutex_unlock(&data->mutex);
+
+	return ret;
+}
+
+static int bma180_read_transfer(struct bma180_accel_data *data,
+		unsigned short data_addr, char *data_buf, int count)
+{
+	int ret;
+	int counter = 5;
+	char *data_buffer = data_buf;
+
+	struct i2c_msg msgs[] = {
+		{
+		.addr = data->client->addr,
+		.flags = data->client->flags & I2C_M_TEN,
+		.len = 1,
+		.buf = data_buffer,
+		},
+		{
+		.addr = data->client->addr,
+		.flags = (data->client->flags & I2C_M_TEN) | I2C_M_RD,
+		.len = count,
+		.buf = data_buffer,
+		},
+	};
+
+	data_buffer[0] = data_addr;
+	msgs->buf = data_buffer;
+
+	do {
+		ret = i2c_transfer(data->client->adapter, msgs, 2);
+		if (ret != 2) {
+			dev_err(&data->client->dev,
+				"i2c_transfer failed\n");
+			counter--;
+			msleep(1);
+		} else {
+			return 0;
+		}
+	} while (counter >= 0);
+
+	return -1;
+}
+
+static int bma180_accel_device_hw_set_bandwidth(struct bma180_accel_data *data,
+					int bandwidth)
+{
+	uint8_t reg_val;
+	uint8_t int_val;
+
+	bma180_read_transfer(data, BMA180_CTRL_REG3, &int_val, 1);
+	bma180_write(data, BMA180_CTRL_REG3, 0x00);
+	bma180_read_transfer(data, BMA180_BW_TCS, &reg_val, 1);
+	reg_val = (reg_val & 0x0F) | ((bandwidth << 4) & 0xF0);
+	bma180_write(data, BMA180_BW_TCS, reg_val);
+	msleep(10);
+	bma180_write(data, BMA180_CTRL_REG3, int_val);
+
+	return 0;
+}
+
+static void bma180_device_sleep_wakeup(struct bma180_accel_data *data,
+							int do_wakeup)
+{
+	int ret;
+	uint8_t reg_val;
+
+	bma180_read_transfer(data, BMA180_CTRL_REG0, &reg_val, 1);
+
+	if (do_wakeup) {
+		reg_val &= ~BMA180_SLEEP;
+		ret = bma180_write(data, BMA180_CTRL_REG0, reg_val);
+		if (ret < 0)
+			dev_err(&data->client->dev,
+				"can't wakeup device\n");
+		msleep(10);
+	} else {
+		reg_val |= BMA180_SLEEP;
+		ret = bma180_write(data, BMA180_CTRL_REG0, reg_val);
+		if (ret < 0)
+			dev_err(&data->client->dev,
+				"sleep mode can't be set\n");
+       }
+}
+
+static irqreturn_t bma180_accel_thread_irq(int irq, void *dev_data)
+{
+	struct bma180_accel_data *data = (struct bma180_accel_data *) dev_data;
+
+	if (!data->client->irq)
+		schedule_delayed_work(&data->wq, 0);
+
+	return IRQ_HANDLED;
+}
+
+static int bma180_accel_data_ready(struct bma180_accel_data *data)
+{
+	int ret;
+	uint8_t data_val_h, data_val_l;
+	short int x = 0;
+	short int y = 0;
+	short int z = 0;
+	uint8_t data_buffer[6];
+
+	ret = bma180_read_transfer(data, BMA180_ACC_X_LSB, data_buffer, 6);
+	if (ret != 0) {
+		dev_err(&data->client->dev,
+			"bma180_read_data_ready failed\n");
+		return -1;
+	}
+	data_val_l = data_buffer[0];
+	data_val_h = data_buffer[1];
+	if (accl_debug)
+		pr_info("%s: X low 0x%X X high 0x%X\n",
+		__func__, data_val_l, data_val_h);
+	x = ((data_val_h << 8) | data_val_l);
+	x = (x >> 2);
+	x = x * g_range_table[data->pdata->g_range]/data->pdata->bit_mode;
+
+	data_val_l = data_buffer[2];
+	data_val_h = data_buffer[3];
+	if (accl_debug)
+		pr_info("%s: Y low 0x%X Y high 0x%X\n",
+		__func__, data_val_l, data_val_h);
+
+	y = ((data_val_h << 8) | data_val_l);
+	y = (y >> 2);
+	y = y * g_range_table[data->pdata->g_range]/data->pdata->bit_mode;
+
+	data_val_l = data_buffer[4];
+	data_val_h = data_buffer[5];
+	if (accl_debug)
+		pr_info("%s: Z low 0x%X Z high 0x%X\n",
+		__func__, data_val_l, data_val_h);
+
+	z = ((data_val_h << 8) | data_val_l);
+	z = (z >> 2);
+	z = z * g_range_table[data->pdata->g_range]/data->pdata->bit_mode;
+
+	if (accl_debug)
+		pr_info("%s: X: 0x%X Y: 0x%X Z: 0x%X\n",
+		__func__, x, y, z);
+
+	input_report_abs(data->input_dev, ABS_X, x);
+	input_report_abs(data->input_dev, ABS_Y, y);
+	input_report_abs(data->input_dev, ABS_Z, z);
+	input_sync(data->input_dev);
+
+	return 0;
+}
+
+static void bma180_accel_device_worklogic(struct work_struct *work)
+{
+	struct bma180_accel_data *data = container_of((struct delayed_work *)work,
+				struct bma180_accel_data, wq);
+
+	bma180_accel_data_ready(data);
+	if (!data->client->irq)
+		schedule_delayed_work(&data->wq,
+			msecs_to_jiffies(data->def_poll_rate));
+
+}
+
+static ssize_t bma180_show_attr_enable(struct device *dev,
+				     struct device_attribute *attr,
+				     char *buf)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct bma180_accel_data *data = platform_get_drvdata(pdev);
+
+	return sprintf(buf, "%d\n", data->pdata->mode);
+}
+
+static ssize_t bma180_store_attr_enable(struct device *dev,
+				     struct device_attribute *attr,
+				     const char *buf, size_t count)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct bma180_accel_data *data = platform_get_drvdata(pdev);
+	unsigned long val;
+	int error, enable;
+
+	error = strict_strtoul(buf, 0, &val);
+	if (error)
+		return error;
+	enable = !!val;
+
+	mutex_lock(&data->mutex);
+	if (data->pdata->mode == enable) {
+		mutex_unlock(&data->mutex);
+		return count;
+	}
+
+	data->pdata->mode = enable;
+	mutex_unlock(&data->mutex);
+
+	if (enable) {
+		data->wakeup_flag = 0;
+		bma180_device_sleep_wakeup(data, WAKEUP);
+		schedule_delayed_work(&data->wq, 0);
+	} else {
+		cancel_delayed_work_sync(&data->wq);
+		bma180_device_sleep_wakeup(data, SLEEP);
+	}
+
+	data->pdata->mode = enable;
+
+	return count;
+}
+
+static ssize_t bma180_show_attr_delay(struct device *dev,
+				     struct device_attribute *attr,
+				     char *buf)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct bma180_accel_data *data = platform_get_drvdata(pdev);
+
+	return sprintf(buf, "%d\n", data->def_poll_rate);
+}
+
+static ssize_t bma180_store_attr_delay(struct device *dev,
+				     struct device_attribute *attr,
+				     const char *buf, size_t count)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct bma180_accel_data *data = platform_get_drvdata(pdev);
+	unsigned long interval;
+	int error;
+	int i = 0;
+
+	error = strict_strtoul(buf, 0, &interval);
+	if (error)
+		return error;
+
+	if (interval < 0)
+		return -EINVAL;
+
+	cancel_delayed_work_sync(&data->wq);
+
+	if (interval >=
+		bma180_measure_interval[BMA_BW_10HZ])
+		i = BMA_BW_10HZ;
+	else if (interval >=
+		bma180_measure_interval[BMA_BW_20HZ])
+		i = BMA_BW_20HZ;
+	else if (interval >=
+		bma180_measure_interval[BMA_BW_40HZ])
+		i = BMA_BW_40HZ;
+	else if (interval >=
+		bma180_measure_interval[BMA_BW_75HZ])
+		i = BMA_BW_75HZ;
+	else if (interval >=
+		bma180_measure_interval[BMA_BW_150HZ])
+		i = BMA_BW_150HZ;
+	else if (interval >=
+		bma180_measure_interval[BMA_BW_300HZ])
+		i = BMA_BW_300HZ;
+	else if (interval >=
+		bma180_measure_interval[BMA_BW_600HZ])
+		i = BMA_BW_600HZ;
+	else
+		i = BMA_BW_1200HZ;
+
+	data->def_poll_rate = interval;
+	bma180_accel_device_hw_set_bandwidth(data, i);
+	schedule_delayed_work(&data->wq, 0);
+
+	return count;
+
+}
+#ifdef BMA180_DEBUG
+static ssize_t bma180_registers_show(struct device *dev,
+			      struct device_attribute *attr, char *buf)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct bma180_accel_data *data = platform_get_drvdata(pdev);
+	unsigned i, n, reg_count;
+	uint8_t value;
+
+	reg_count = sizeof(bma180_regs) / sizeof(bma180_regs[0]);
+	for (i = 0, n = 0; i < reg_count; i++) {
+		bma180_read_transfer(data, bma180_regs[i].reg, &value, 1);
+		n += scnprintf(buf + n, PAGE_SIZE - n,
+			       "%-20s = 0x%02X\n",
+			       bma180_regs[i].name,
+			       value);
+	}
+
+	return n;
+}
+
+static ssize_t bma180_registers_store(struct device *dev,
+			       struct device_attribute *attr,
+			       const char *buf, size_t count)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct bma180_accel_data *data = platform_get_drvdata(pdev);
+	unsigned i, reg_count, value;
+	int error = 0;
+	char name[30];
+
+	if (count >= 30) {
+		pr_err("%s:input too long\n", __func__);
+		return -1;
+	}
+
+	if (sscanf(buf, "%s %x", name, &value) != 2) {
+		pr_err("%s:unable to parse input\n", __func__);
+		return -1;
+	}
+
+	reg_count = sizeof(bma180_regs) / sizeof(bma180_regs[0]);
+	for (i = 0; i < reg_count; i++) {
+		if (!strcmp(name, bma180_regs[i].name)) {
+			if (bma180_regs[i].writeable) {
+				error = bma180_write(data,
+					bma180_regs[i].reg,
+					value);
+				if (error) {
+					pr_err("%s:Failed to write %s\n",
+						__func__, name);
+					return -1;
+				}
+			} else {
+				pr_err("%s:Register %s is not writeable\n",
+						__func__, name);
+					return -1;
+			}
+			return count;
+		}
+	}
+
+	pr_err("%s:no such register %s\n", __func__, name);
+	return -1;
+}
+
+static DEVICE_ATTR(registers, S_IWUSR | S_IRUGO,
+		bma180_registers_show, bma180_registers_store);
+#endif
+static DEVICE_ATTR(enable, S_IWUSR | S_IRUGO,
+		bma180_show_attr_enable, bma180_store_attr_enable);
+
+static DEVICE_ATTR(delay, S_IWUSR | S_IRUGO,
+		bma180_show_attr_delay, bma180_store_attr_delay);
+
+static struct attribute *bma180_accel_attrs[] = {
+	&dev_attr_enable.attr,
+	&dev_attr_delay.attr,
+#ifdef BMA180_DEBUG
+	&dev_attr_registers.attr,
+#endif
+	NULL
+};
+
+static const struct attribute_group bma180_accel_attr_group = {
+	.attrs = bma180_accel_attrs,
+};
+
+static int bma180_accel_device_hw_reset(struct bma180_accel_data *data)
+{
+	/* write 0xB6 to this register to do a soft-reset */
+	bma180_write(data, BMA180_RESET, 0xB6);
+
+	return 0;
+}
+
+static int bma180_accel_device_hw_reset_int(struct bma180_accel_data *data)
+{
+	uint8_t reg_val;
+
+	bma180_read_transfer(data, BMA180_CTRL_REG0, &reg_val, 1);
+	reg_val |= 0x40;
+	bma180_write(data, BMA180_CTRL_REG0, reg_val);
+
+	return 0;
+}
+
+static int bma180_accel_device_hw_set_grange(struct bma180_accel_data *data,
+					int grange)
+{
+	uint8_t reg_val;
+
+	bma180_read_transfer(data, BMA180_OFFSET_LSB1, &reg_val, 1);
+	reg_val = (reg_val & 0xF1) | ((grange << 1) & 0x0E);
+	bma180_write(data, BMA180_OFFSET_LSB1, reg_val);
+
+	return 0;
+}
+
+static int bma180_accel_device_hw_set_smp_skip(struct bma180_accel_data *data,
+					int smp_skip)
+{
+	uint8_t reg_val;
+
+	bma180_read_transfer(data, BMA180_OFFSET_LSB1, &reg_val, 1);
+	reg_val = (reg_val & 0xFE) | ((smp_skip << 0) & 0x01);
+	bma180_write(data, BMA180_OFFSET_LSB1, reg_val);
+
+	return 0;
+}
+
+static int bma180_accel_device_hw_set_mode(struct bma180_accel_data *data,
+					int mode)
+{
+	uint8_t reg_val;
+
+	bma180_read_transfer(data, BMA180_TCO_Z, &reg_val, 1);
+	reg_val = (reg_val & 0xFC) | ((mode << 0) & 0x03);
+	bma180_write(data, BMA180_TCO_Z, reg_val);
+
+	return 0;
+}
+
+static int bma180_accel_device_hw_set_12bits(struct bma180_accel_data *data,
+					int mode)
+{
+	uint8_t reg_val;
+
+	bma180_read_transfer(data, BMA180_OFFSET_T, &reg_val, 1);
+	reg_val = (reg_val & 0xFE) | ((mode << 0) & 0x01);
+	bma180_write(data, BMA180_OFFSET_T, reg_val);
+
+	return 0;
+}
+
+static int bma180_accel_device_hw_init(struct bma180_accel_data *data)
+{
+	int ret = 0;
+
+	bma180_accel_device_hw_reset(data);
+	msleep(1);
+	bma180_write(data, BMA180_CTRL_REG0, data->pdata->ctrl_reg0);
+	bma180_write(data, BMA180_CTRL_REG3, 0x00);
+	bma180_write(data, BMA180_HIGH_LOW_INFO, 0x00);
+	bma180_write(data, BMA180_SLOPE_TAPSENS_INFO, 0x00);
+	bma180_write(data, BMA180_GAIN_Y, 0xA9);
+	bma180_write(data, BMA180_HIGH_DUR, 0x00);
+	bma180_accel_device_hw_set_grange(data, data->pdata->g_range);
+	bma180_accel_device_hw_set_bandwidth(data, data->pdata->bandwidth);
+	bma180_accel_device_hw_set_mode(data, data->pdata->mode);
+	bma180_accel_device_hw_set_smp_skip(data, data->pdata->smp_skip);
+	bma180_accel_device_hw_set_12bits(data, data->pdata->bit_mode);
+	bma180_write(data, BMA180_CTRL_REG3, 0x02);
+
+	bma180_accel_device_hw_reset_int(data);
+
+	return ret;
+}
+
+
+static int __devinit bma180_accel_driver_probe(struct i2c_client *client,
+		const struct i2c_device_id *id)
+{
+	struct bma180accel_platform_data *pdata = client->dev.platform_data;
+	struct bma180_accel_data *data;
+	int ret = 0;
+
+	pr_info("%s: Enter\n", __func__);
+
+	if (pdata == NULL) {
+		pr_err("%s: Platform data not found\n", __func__);
+		return -ENODEV;
+	}
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+		pr_err("%s: need I2C_FUNC_I2C\n", __func__);
+		return -ENODEV;
+	}
+
+	/* alloc memory for data structure */
+	data = kzalloc(sizeof(struct bma180_accel_data), GFP_KERNEL);
+	if (!data) {
+		ret = -ENOMEM;
+		goto error;
+	}
+	data->pdata = pdata;
+	data->client = client;
+	data->def_poll_rate = pdata->def_poll_rate;
+	i2c_set_clientdata(client, data);
+
+	data->input_dev = input_allocate_device();
+	if (data->input_dev == NULL) {
+		ret = -ENOMEM;
+		dev_err(&data->client->dev,
+			"Failed to allocate input device\n");
+		goto error;
+	}
+
+	INIT_DELAYED_WORK(&data->wq, bma180_accel_device_worklogic);
+
+	mutex_init(&data->mutex);
+
+	data->input_dev->name = "bma180";
+	data->input_dev->id.bustype = BUS_I2C;
+
+	__set_bit(EV_ABS, data->input_dev->evbit);
+	input_set_abs_params(data->input_dev, ABS_X,
+				-g_range_table[data->pdata->g_range],
+				g_range_table[data->pdata->g_range],
+				data->pdata->fuzz_x, 0);
+	input_set_abs_params(data->input_dev, ABS_Y,
+				-g_range_table[data->pdata->g_range],
+				g_range_table[data->pdata->g_range],
+				data->pdata->fuzz_y, 0);
+	input_set_abs_params(data->input_dev, ABS_Z,
+				-g_range_table[data->pdata->g_range],
+				g_range_table[data->pdata->g_range],
+				data->pdata->fuzz_z, 0);
+
+	data->input_dev->dev.parent = &data->client->dev;
+	input_set_drvdata(data->input_dev, data);
+
+	ret = input_register_device(data->input_dev);
+	if (ret) {
+		dev_err(&data->client->dev,
+			"Unable to register input device\n");
+	}
+
+	if (data->client->irq) {
+		ret = request_threaded_irq(data->client->irq, NULL,
+					bma180_accel_thread_irq,
+					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+					data->client->name, data);
+		if (ret < 0) {
+			dev_err(&data->client->dev,
+				"request_threaded_irq failed\n");
+				goto error_1;
+		}
+	}
+
+	ret = bma180_accel_device_hw_init(data);
+	if (ret)
+		goto error_1;
+
+	ret = sysfs_create_group(&client->dev.kobj, &bma180_accel_attr_group);
+	if (ret)
+		goto error_1;
+
+	return 0;
+
+error_1:
+	input_free_device(data->input_dev);
+	mutex_destroy(&data->mutex);
+	kfree(data);
+error:
+	return ret;
+}
+
+static int __devexit bma180_accel_driver_remove(struct i2c_client *client)
+{
+	struct bma180_accel_data *data = i2c_get_clientdata(client);
+	int ret = 0;
+
+	sysfs_remove_group(&client->dev.kobj, &bma180_accel_attr_group);
+
+	if (data->client->irq)
+		free_irq(data->client->irq, data);
+
+	cancel_delayed_work_sync(&data->wq);
+
+	if (data->input_dev)
+		input_free_device(data->input_dev);
+
+	i2c_set_clientdata(client, NULL);
+	kfree(data);
+
+	return ret;
+}
+
+
+#ifdef CONFIG_PM
+static int bma180_accel_driver_suspend(struct i2c_client *client,
+				pm_message_t mesg)
+{
+	struct bma180_accel_data *data = i2c_get_clientdata(client);
+
+	mutex_lock(&data->mutex);
+	if (!data->pdata->mode) {
+		mutex_unlock(&data->mutex);
+		return 0;
+	}
+
+	data->pdata->mode = 0;
+	mutex_unlock(&data->mutex);
+	data->wakeup_flag = 1;
+
+	cancel_delayed_work_sync(&data->wq);
+	bma180_device_sleep_wakeup(data, SLEEP);
+
+	return 0;
+}
+
+static int bma180_accel_driver_resume(struct i2c_client *client)
+{
+	struct bma180_accel_data *data = i2c_get_clientdata(client);
+
+	mutex_lock(&data->mutex);
+	if (data->pdata->mode) {
+		mutex_unlock(&data->mutex);
+		return 0;
+	}
+
+	if (!data->wakeup_flag) {
+		mutex_unlock(&data->mutex);
+		return 0;
+	}
+
+	data->pdata->mode = 1;
+	mutex_unlock(&data->mutex);
+	data->wakeup_flag = 0;
+
+	bma180_device_sleep_wakeup(data, WAKEUP);
+	schedule_delayed_work(&data->wq, 0);
+
+	return 0;
+}
+#endif
+
+static const struct i2c_device_id bma180_accel_idtable[] = {
+	{ DRIVER_NAME, 0 },
+	{ },
+};
+
+MODULE_DEVICE_TABLE(i2c, bma180_accel_idtable);
+
+static struct i2c_driver bma180_accel_driver = {
+	.probe		= bma180_accel_driver_probe,
+	.remove		= bma180_accel_driver_remove,
+	.id_table	= bma180_accel_idtable,
+#ifdef CONFIG_PM
+	.suspend	= bma180_accel_driver_suspend,
+	.resume		= bma180_accel_driver_resume,
+#endif
+	.driver = {
+		.name = DRIVER_NAME
+	},
+};
+
+static int __init bma180_accel_driver_init(void)
+{
+	return i2c_add_driver(&bma180_accel_driver);
+}
+
+static void __exit bma180_accel_driver_exit(void)
+{
+	i2c_del_driver(&bma180_accel_driver);
+}
+
+module_init(bma180_accel_driver_init);
+module_exit(bma180_accel_driver_exit);
+
+MODULE_DESCRIPTION("BMA-180 Accelerometer Driver");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Dan Murphy <DMurphy@ti.com>");
diff --git a/include/linux/i2c/bma180.h b/include/linux/i2c/bma180.h
new file mode 100644
index 0000000..2d5bafe
--- /dev/null
+++ b/include/linux/i2c/bma180.h
@@ -0,0 +1,72 @@
+/*
+ * bma180.h
+ * BMA-180 Accelerometer driver
+ *
+ * Copyright (C) 2010 Texas Instruments
+ * Author: Jorge Bustamante <jbustamante@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License 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.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _LINUX_BMA180_I2C_H
+#define _LINUX_BMA180_I2C_H
+
+#define BMA_GRANGE_1G		0x0
+#define BMA_GRANGE_1_5G		0x1
+#define BMA_GRANGE_2G		0x2
+#define BMA_GRANGE_3G		0x3
+#define BMA_GRANGE_4G		0x4
+#define BMA_GRANGE_8G		0x5
+#define BMA_GRANGE_16G		0x6
+
+#define BMA_BW_10HZ		0x0
+#define BMA_BW_20HZ		0x1
+#define BMA_BW_40HZ		0x2
+#define BMA_BW_75HZ		0x3
+#define BMA_BW_150HZ		0x4
+#define BMA_BW_300HZ		0x5
+#define BMA_BW_600HZ		0x6
+#define BMA_BW_1200HZ		0x7
+#define BMA_BW_HP_1HZ		0x8
+#define BMA_BW_BP_0_2HZ_300HZ   0x9
+
+#define BMA_MODE_LOW_NOISE		0x0
+#define BMA_MODE_SUPER_LOW_NOISE	0x1
+#define BMA_MODE_ULTRA_LOW_NOISE	0x2
+#define BMA_MODE_LOW_POWER		0x3
+
+#define BMA_BITMODE_14BITS		0x2000
+#define BMA_BITMODE_12BITS		0x0800
+
+#define BMA180_SLEEP			0x02
+
+struct bma180accel_platform_data {
+	uint8_t method;
+	uint32_t def_poll_rate;
+	uint16_t fuzz_x;
+	uint16_t fuzz_y;
+	uint16_t fuzz_z;
+	uint8_t ctrl_reg0;
+	uint8_t ctrl_reg1;
+	uint8_t ctrl_reg2;
+	uint8_t ctrl_reg3;
+	uint8_t ctrl_reg4;
+
+	uint16_t bandwidth;
+	uint8_t g_range;
+	uint8_t mode;
+	int bit_mode;
+	uint8_t smp_skip;
+};
+
+#endif