[PATCH v5 1/1] input: add driver for Bosch Sensortec's BMA150 accelerometer

[Eric Andersson]

Signed-off-by: Albert Zhang <xu.zhang@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Eric Andersson <eric.andersson@xxxxxxxxxxxxx>
---
 drivers/input/misc/Kconfig  |   11 +
 drivers/input/misc/Makefile |    1 +
 drivers/input/misc/bma150.c |  667 +++++++++++++++++++++++++++++++++++++++++++
 include/linux/bma150.h      |   64 ++++
 4 files changed, 743 insertions(+), 0 deletions(-)
 create mode 100644 drivers/input/misc/bma150.c
 create mode 100644 include/linux/bma150.h

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 45dc6aa..e6681d2 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -478,4 +478,15 @@ config INPUT_XEN_KBDDEV_FRONTEND
 	  To compile this driver as a module, choose M here: the
 	  module will be called xen-kbdfront.
 
+config INPUT_BMA150
+	tristate "BMA150/SMB380 acceleration sensor support"
+	depends on I2C
+	select INPUT_POLLDEV
+	help
+	  Say Y here if you have Bosch Sensortec's BMA150 or SMB380
+	  acceleration sensor hooked to an I2C bus.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called bma150.
+
 endif
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 38efb2c..9b13e0e 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -45,4 +45,5 @@ obj-$(CONFIG_INPUT_WISTRON_BTNS)	+= wistron_btns.o
 obj-$(CONFIG_INPUT_WM831X_ON)		+= wm831x-on.o
 obj-$(CONFIG_INPUT_XEN_KBDDEV_FRONTEND)	+= xen-kbdfront.o
 obj-$(CONFIG_INPUT_YEALINK)		+= yealink.o
+obj-$(CONFIG_INPUT_BMA150)		+= bma150.o
 
diff --git a/drivers/input/misc/bma150.c b/drivers/input/misc/bma150.c
new file mode 100644
index 0000000..157f7cf
--- /dev/null
+++ b/drivers/input/misc/bma150.c
@@ -0,0 +1,667 @@
+/*
+ * Copyright (c) 2011 Bosch Sensortec GmbH
+ * Copyright (c) 2011 Unixphere
+ *
+ * This driver adds support for Bosch Sensortec's digital acceleration
+ * sensors BMA150 and SMB380.
+ * The SMB380 is fully compatible with BMA150 and only differs in packaging.
+ *
+ * The datasheet for the BMA150 chip can be found here:
+ * http://www.bosch-sensortec.com/content/language1/downloads/BST-BMA150-DS000-07.pdf
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/input-polldev.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/bma150.h>
+
+#define ABSMAX_ACC_VAL		0x01FF
+#define ABSMIN_ACC_VAL		-(ABSMAX_ACC_VAL)
+/* Each axis is represented by a 2-byte data word */
+#define BMA150_XYZ_DATA_SIZE	6
+/* Input poll interval in milliseconds */
+#define BMA150_POLL_INTERVAL	10
+#define BMA150_POLL_MAX		200
+#define BMA150_POLL_MIN		0
+
+#define BMA150_BW_25HZ		0
+#define BMA150_BW_50HZ		1
+#define BMA150_BW_100HZ		2
+#define BMA150_BW_190HZ		3
+#define BMA150_BW_375HZ		4
+#define BMA150_BW_750HZ		5
+#define BMA150_BW_1500HZ	6
+
+#define BMA150_RANGE_2G		0
+#define BMA150_RANGE_4G		1
+#define BMA150_RANGE_8G		2
+
+#define BMA150_MODE_NORMAL	0
+#define BMA150_MODE_SLEEP	2
+#define BMA150_MODE_WAKE_UP	3
+
+#define BMA150_CHIP_ID		2
+#define BMA150_CHIP_ID_REG	BMA150_DATA_0_REG
+
+#define BMA150_ACC_X_LSB_REG	BMA150_DATA_2_REG
+
+#define BMA150_SLEEP_POS	0
+#define BMA150_SLEEP_MSK	0x01
+#define BMA150_SLEEP_REG	BMA150_CTRL_0_REG
+
+#define BMA150_BANDWIDTH_POS	0
+#define BMA150_BANDWIDTH_MSK	0x07
+#define BMA150_BANDWIDTH_REG	BMA150_CTRL_2_REG
+
+#define BMA150_RANGE_POS	3
+#define BMA150_RANGE_MSK	0x18
+#define BMA150_RANGE_REG	BMA150_CTRL_2_REG
+
+#define BMA150_WAKE_UP_POS	0
+#define BMA150_WAKE_UP_MSK	0x01
+#define BMA150_WAKE_UP_REG	BMA150_CTRL_3_REG
+
+#define BMA150_SW_RES_POS	1
+#define BMA150_SW_RES_MSK	0x02
+#define BMA150_SW_RES_REG	BMA150_CTRL_0_REG
+
+/* Any-motion interrupt register fields */
+#define BMA150_ANY_MOTION_EN_POS	6
+#define BMA150_ANY_MOTION_EN_MSK	0x40
+#define BMA150_ANY_MOTION_EN_REG	BMA150_CTRL_1_REG
+
+#define BMA150_ANY_MOTION_DUR_POS	6
+#define BMA150_ANY_MOTION_DUR_MSK	0xC0
+#define BMA150_ANY_MOTION_DUR_REG	BMA150_CFG_5_REG
+
+#define BMA150_ANY_MOTION_THRES_REG	BMA150_CFG_4_REG
+
+/* Advanced interrupt register fields */
+#define BMA150_ADV_INT_EN_POS		6
+#define BMA150_ADV_INT_EN_MSK		0x40
+#define BMA150_ADV_INT_EN_REG		BMA150_CTRL_3_REG
+
+/* High-G interrupt register fields */
+#define BMA150_HIGH_G_EN_POS		1
+#define BMA150_HIGH_G_EN_MSK		0x02
+#define BMA150_HIGH_G_EN_REG		BMA150_CTRL_1_REG
+
+#define BMA150_HIGH_G_HYST_POS		3
+#define BMA150_HIGH_G_HYST_MSK		0x38
+#define BMA150_HIGH_G_HYST_REG		BMA150_CFG_5_REG
+
+#define BMA150_HIGH_G_DUR_REG		BMA150_CFG_3_REG
+#define BMA150_HIGH_G_THRES_REG		BMA150_CFG_2_REG
+
+/* Low-G interrupt register fields */
+#define BMA150_LOW_G_EN_POS		0
+#define BMA150_LOW_G_EN_MSK		0x01
+#define BMA150_LOW_G_EN_REG		BMA150_CTRL_1_REG
+
+#define BMA150_LOW_G_HYST_POS		0
+#define BMA150_LOW_G_HYST_MSK		0x07
+#define BMA150_LOW_G_HYST_REG		BMA150_CFG_5_REG
+
+#define BMA150_LOW_G_DUR_REG		BMA150_CFG_1_REG
+#define BMA150_LOW_G_THRES_REG		BMA150_CFG_0_REG
+
+struct bma150_data {
+	struct i2c_client *client;
+	struct bma150_cfg cfg;
+	struct input_polled_dev *input_polled;
+	struct input_dev *input;
+	struct mutex mutex;
+};
+
+/*
+ * The settings for the given range, bandwidth and interrupt features
+ * are stated and verified by Bosch Sensortec where they are configured
+ * to provide a generic sensitivity performance.
+ */
+static const struct bma150_cfg def_cfg = {
+	BMA150_RANGE_2G,	/* Range */
+	BMA150_BW_50HZ,		/* Bandwidth */
+	1,			/* Any-motion interrupt */
+	1,			/* High-G interrupt */
+	1,			/* Low-G interrupt */
+	0,			/* Any-motion duration */
+	0,			/* Any-motion threshold */
+	0,			/* High-G hysteresis */
+	150,			/* High-G duration */
+	140,			/* High-G threshold */
+	0,			/* Low-G hysteresis */
+	150,			/* Low-G duration */
+	40			/* Low-G threshold */
+};
+
+static int bma150_write_byte(struct i2c_client *client, u8 reg, u8 val)
+{
+	s32 ret;
+	/* As per specification, disable irq in between register writes */
+	if (client->irq)
+		disable_irq_nosync(client->irq);
+	ret = i2c_smbus_write_byte_data(client, reg, val);
+	if (client->irq)
+		enable_irq(client->irq);
+	return ret;
+}
+
+static int bma150_set_reg_bits(struct i2c_client *client,
+					int val, int shift, u8 mask, u8 reg)
+{
+	int data = i2c_smbus_read_byte_data(client, reg);
+
+	if (data < 0)
+		return data;
+
+	data = (data & ~mask) | ((val << shift) & mask);
+	return bma150_write_byte(client, reg, data);
+}
+
+static int bma150_soft_reset(struct i2c_client *client)
+{
+	s32 ret;
+	struct bma150_data *bma150 = i2c_get_clientdata(client);
+
+	mutex_lock(&bma150->mutex);
+	ret = bma150_set_reg_bits(client, 1, BMA150_SW_RES_POS,
+			BMA150_SW_RES_MSK, BMA150_SW_RES_REG);
+	msleep(2);
+	mutex_unlock(&bma150->mutex);
+	return ret;
+}
+
+static int bma150_set_mode(struct i2c_client *client, u8 mode)
+{
+	s32 ret;
+	struct bma150_data *bma150 = i2c_get_clientdata(client);
+
+	mutex_lock(&bma150->mutex);
+	ret = bma150_set_reg_bits(client, mode, BMA150_WAKE_UP_POS,
+				BMA150_WAKE_UP_MSK, BMA150_WAKE_UP_REG);
+	if (ret < 0)
+		goto error;
+	ret = bma150_set_reg_bits(client, mode, BMA150_SLEEP_POS,
+				BMA150_SLEEP_MSK, BMA150_SLEEP_REG);
+	if (ret < 0)
+		goto error;
+	if (mode == BMA150_MODE_NORMAL)
+		msleep(2);
+error:
+	mutex_unlock(&bma150->mutex);
+	return ret;
+}
+
+static int bma150_set_range(struct i2c_client *client, u8 range)
+{
+	s32 ret;
+	struct bma150_data *bma150 = i2c_get_clientdata(client);
+
+	mutex_lock(&bma150->mutex);
+	ret = bma150_set_reg_bits(client, range, BMA150_RANGE_POS,
+				BMA150_RANGE_MSK, BMA150_RANGE_REG);
+	mutex_unlock(&bma150->mutex);
+	return ret;
+}
+
+static int bma150_set_bandwidth(struct i2c_client *client, u8 bw)
+{
+	s32 ret;
+	struct bma150_data *bma150 = i2c_get_clientdata(client);
+
+	mutex_lock(&bma150->mutex);
+	ret = bma150_set_reg_bits(client, bw, BMA150_BANDWIDTH_POS,
+				BMA150_BANDWIDTH_MSK, BMA150_BANDWIDTH_REG);
+	mutex_unlock(&bma150->mutex);
+	return ret;
+}
+
+static int bma150_set_low_g_interrupt(struct i2c_client *client, u8 enable,
+						u8 hyst, u8 dur, u8 thres)
+{
+	s32 ret;
+	struct bma150_data *bma150 = i2c_get_clientdata(client);
+
+	mutex_lock(&bma150->mutex);
+	ret = bma150_set_reg_bits(bma150->client, hyst,
+				BMA150_LOW_G_HYST_POS,
+					BMA150_LOW_G_HYST_MSK,
+						BMA150_LOW_G_HYST_REG);
+	if (ret < 0)
+		goto error;
+
+	ret = bma150_write_byte(bma150->client,	BMA150_LOW_G_DUR_REG, dur);
+	if (ret < 0)
+		goto error;
+
+	ret = bma150_write_byte(bma150->client,	BMA150_LOW_G_THRES_REG, thres);
+	if (ret < 0)
+		goto error;
+
+	ret = bma150_set_reg_bits(bma150->client, !!enable,
+				BMA150_LOW_G_EN_POS, BMA150_LOW_G_EN_MSK,
+					BMA150_LOW_G_EN_REG);
+error:
+	mutex_unlock(&bma150->mutex);
+	return ret;
+}
+
+static int bma150_set_high_g_interrupt(struct i2c_client *client, u8 enable,
+						u8 hyst, u8 dur, u8 thres)
+{
+	s32 ret;
+	struct bma150_data *bma150 = i2c_get_clientdata(client);
+
+	mutex_lock(&bma150->mutex);
+	ret = bma150_set_reg_bits(bma150->client, hyst,
+				BMA150_HIGH_G_HYST_POS,
+					BMA150_HIGH_G_HYST_MSK,
+						BMA150_HIGH_G_HYST_REG);
+	if (ret < 0)
+		goto error;
+
+	ret = bma150_write_byte(bma150->client,	BMA150_HIGH_G_DUR_REG, dur);
+	if (ret < 0)
+		goto error;
+
+	ret = bma150_write_byte(bma150->client,	BMA150_HIGH_G_THRES_REG, thres);
+	if (ret < 0)
+		goto error;
+
+	ret = bma150_set_reg_bits(bma150->client, !!enable,
+				BMA150_HIGH_G_EN_POS, BMA150_HIGH_G_EN_MSK,
+					BMA150_HIGH_G_EN_REG);
+error:
+	mutex_unlock(&bma150->mutex);
+	return ret;
+}
+
+
+static int bma150_set_any_motion_interrupt(struct i2c_client *client, u8 enable,
+							u8 dur, u8 thres)
+{
+	s32 ret;
+	struct bma150_data *bma150 = i2c_get_clientdata(client);
+
+	mutex_lock(&bma150->mutex);
+	ret = bma150_set_reg_bits(bma150->client, dur,
+				BMA150_ANY_MOTION_DUR_POS,
+					BMA150_ANY_MOTION_DUR_MSK,
+						BMA150_ANY_MOTION_DUR_REG);
+	if (ret < 0)
+		goto error;
+
+	ret = bma150_write_byte(bma150->client,
+					BMA150_ANY_MOTION_THRES_REG, thres);
+	if (ret < 0)
+		goto error;
+
+	ret = bma150_set_reg_bits(bma150->client, !!enable,
+				BMA150_ADV_INT_EN_POS, BMA150_ADV_INT_EN_MSK,
+					BMA150_ADV_INT_EN_REG);
+	if (ret < 0)
+		goto error;
+
+	ret = bma150_set_reg_bits(bma150->client, !!enable,
+				BMA150_ANY_MOTION_EN_POS,
+					BMA150_ANY_MOTION_EN_MSK,
+						BMA150_ANY_MOTION_EN_REG);
+error:
+	mutex_unlock(&bma150->mutex);
+	return ret;
+}
+
+static int bma150_initialize(struct i2c_client *client, struct bma150_cfg *cfg)
+{
+	s32 ret = bma150_soft_reset(client);
+	if (ret < 0)
+		return ret;
+
+	ret = bma150_set_bandwidth(client, cfg->bandwidth);
+	if (ret < 0)
+		return ret;
+
+	ret = bma150_set_range(client, cfg->range);
+	if (ret < 0)
+		return ret;
+
+	if (!client->irq)
+		goto exit;
+
+	ret = bma150_set_any_motion_interrupt(client, cfg->any_motion_int,
+			cfg->any_motion_dur, cfg->any_motion_thres);
+	if (ret < 0)
+		return ret;
+
+	ret = bma150_set_high_g_interrupt(client, cfg->hg_int,
+			cfg->hg_hyst, cfg->hg_dur, cfg->hg_thres);
+	if (ret < 0)
+		return ret;
+
+	ret = bma150_set_low_g_interrupt(client, cfg->lg_int,
+			cfg->lg_hyst, cfg->lg_dur, cfg->lg_thres);
+	if (ret < 0)
+		return ret;
+exit:
+	ret = bma150_set_mode(client, BMA150_MODE_SLEEP);
+	return ret;
+}
+
+static void bma150_report_xyz(struct bma150_data *bma150)
+{
+	u8 data[BMA150_XYZ_DATA_SIZE];
+	s16 x, y, z;
+	s32 ret;
+
+	mutex_lock(&bma150->mutex);
+	ret = i2c_smbus_read_i2c_block_data(bma150->client,
+			BMA150_ACC_X_LSB_REG, BMA150_XYZ_DATA_SIZE, data);
+	if (ret != BMA150_XYZ_DATA_SIZE)
+		return;
+
+	x = ((0xc0 & data[0]) >> 6) | (data[1] << 2);
+	y = ((0xc0 & data[2]) >> 6) | (data[3] << 2);
+	z = ((0xc0 & data[4]) >> 6) | (data[5] << 2);
+
+	/* sign extension */
+	x = (s16) (x << 6) >> 6;
+	y = (s16) (y << 6) >> 6;
+	z = (s16) (z << 6) >> 6;
+	mutex_unlock(&bma150->mutex);
+
+	input_report_abs(bma150->input, ABS_X, x);
+	input_report_abs(bma150->input, ABS_Y, y);
+	input_report_abs(bma150->input, ABS_Z, z);
+	input_sync(bma150->input);
+}
+
+static irqreturn_t bma150_irq_thread(int irq, void *dev)
+{
+	bma150_report_xyz(dev);
+	return IRQ_HANDLED;
+}
+
+static void bma150_poll(struct input_polled_dev *dev)
+{
+	bma150_report_xyz(dev->private);
+}
+
+static int bma150_open(struct bma150_data *bma150)
+{
+#ifdef CONFIG_PM_RUNTIME
+	return pm_runtime_get_sync(&bma150->client->dev);
+#else
+	return bma150_set_mode(bma150->client, BMA150_MODE_NORMAL);
+#endif
+}
+
+static void bma150_close(struct bma150_data *bma150)
+{
+#ifdef CONFIG_PM_RUNTIME
+	pm_runtime_put(&bma150->client->dev);
+#else
+	bma150_set_mode(bma150->client, BMA150_MODE_SLEEP);
+#endif
+}
+
+static int bma150_irq_open(struct input_dev *input)
+{
+	struct bma150_data *bma150 = input_get_drvdata(input);
+	return bma150_open(bma150);
+}
+
+static void bma150_irq_close(struct input_dev *input)
+{
+	struct bma150_data *bma150 = input_get_drvdata(input);
+	bma150_close(bma150);
+}
+
+static void bma150_poll_open(struct input_polled_dev *ipoll_dev)
+{
+	struct bma150_data *bma150 = ipoll_dev->private;
+	bma150_open(bma150);
+}
+
+static void bma150_poll_close(struct input_polled_dev *ipoll_dev)
+{
+	struct bma150_data *bma150 = ipoll_dev->private;
+	bma150_close(bma150);
+}
+
+static void bma150_free_input_device(struct bma150_data *bma150)
+{
+	if (bma150->client->irq > 0)
+		input_unregister_device(bma150->input);
+	else
+		input_unregister_polled_device(bma150->input_polled);
+}
+
+static int bma150_setup_input_device(struct bma150_data *bma150)
+{
+	struct input_polled_dev *ipoll_dev;
+	struct input_dev *idev;
+	int ret;
+
+	if (bma150->client->irq > 0) {
+		idev = input_allocate_device();
+		if (!idev)
+			return -ENOMEM;
+		idev->open = bma150_irq_open;
+		idev->close = bma150_irq_close;
+		input_set_drvdata(idev, bma150);
+	} else {
+		ipoll_dev = input_allocate_polled_device();
+		if (!ipoll_dev)
+			return -ENOMEM;
+		ipoll_dev->private = bma150;
+		ipoll_dev->open = bma150_poll_open;
+		ipoll_dev->close = bma150_poll_close;
+		ipoll_dev->poll = bma150_poll;
+		ipoll_dev->poll_interval = BMA150_POLL_INTERVAL;
+		ipoll_dev->poll_interval_min = BMA150_POLL_MIN;
+		ipoll_dev->poll_interval_max = BMA150_POLL_MAX;
+
+		idev = ipoll_dev->input;
+	}
+
+	idev->name = BMA150_DRIVER;
+	idev->phys = BMA150_DRIVER "/input0";
+	idev->id.bustype = BUS_I2C;
+	idev->dev.parent = &bma150->client->dev;
+
+	input_set_capability(idev, EV_ABS, ABS_MISC);
+	input_set_abs_params(idev, ABS_X, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
+	input_set_abs_params(idev, ABS_Y, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
+	input_set_abs_params(idev, ABS_Z, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
+
+	if (bma150->client->irq > 0) {
+		ret = input_register_device(idev);
+		if (ret < 0) {
+			input_free_device(idev);
+			return ret;
+		}
+		ret = request_threaded_irq(bma150->client->irq, NULL,
+			bma150_irq_thread, IRQF_TRIGGER_RISING,
+			BMA150_DRIVER, bma150);
+		if (ret < 0) {
+			dev_err(&bma150->client->dev,
+				"irq request failed %d, ret %d\n",
+				bma150->client->irq, ret);
+			goto error_irq;
+		}
+	} else {
+		ret = input_register_polled_device(ipoll_dev);
+		if (ret < 0) {
+			input_free_polled_device(ipoll_dev);
+			return ret;
+		}
+		bma150->input_polled = ipoll_dev;
+	}
+	bma150->input = idev;
+	return ret;
+
+error_irq:
+	bma150_free_input_device(bma150);
+	return ret;
+}
+
+static int __devinit bma150_probe(struct i2c_client *client,
+				  const struct i2c_device_id *id)
+{
+	struct bma150_data *bma150;
+	struct bma150_platform_data *pdata;
+	int ret;
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+		dev_err(&client->dev, "i2c_check_functionality error\n");
+		return -EIO;
+	}
+
+	ret = i2c_smbus_read_byte_data(client, BMA150_CHIP_ID_REG);
+	if (ret != BMA150_CHIP_ID) {
+		dev_err(&client->dev, "BMA150 chip id error: %d\n", ret);
+		return -EINVAL;
+	}
+
+	bma150 = kzalloc(sizeof(struct bma150_data), GFP_KERNEL);
+	if (!bma150)
+		return -ENOMEM;
+
+	i2c_set_clientdata(client, bma150);
+	bma150->client = client;
+
+	pdata = client->dev.platform_data;
+	if (pdata) {
+		bma150->cfg.range = pdata->cfg.range;
+		bma150->cfg.bandwidth = pdata->cfg.bandwidth;
+		if (pdata->irq_gpio_cfg && (pdata->irq_gpio_cfg() < 0)) {
+			dev_err(&client->dev,
+				"IRQ GPIO conf. error %d, ret %d\n",
+				client->irq, ret);
+			goto kfree_exit;
+		}
+		if (client->irq > 0) {
+			bma150->cfg.any_motion_int = pdata->cfg.any_motion_int;
+			bma150->cfg.hg_int = pdata->cfg.hg_int;
+			bma150->cfg.lg_int = pdata->cfg.lg_int;
+			bma150->cfg.any_motion_thres =
+				pdata->cfg.any_motion_thres;
+			bma150->cfg.any_motion_dur = pdata->cfg.any_motion_dur;
+			bma150->cfg.lg_thres = pdata->cfg.lg_thres;
+			bma150->cfg.lg_hyst = pdata->cfg.lg_hyst;
+			bma150->cfg.lg_dur = pdata->cfg.lg_dur;
+			bma150->cfg.hg_thres = pdata->cfg.hg_thres;
+			bma150->cfg.hg_hyst = pdata->cfg.hg_hyst;
+			bma150->cfg.hg_dur = pdata->cfg.hg_dur;
+		}
+	} else {
+		memcpy(&bma150->cfg, &def_cfg, sizeof(struct bma150_cfg));
+	}
+	mutex_init(&bma150->mutex);
+	ret = bma150_initialize(client, &bma150->cfg);
+	if (ret < 0)
+		goto kfree_exit;
+
+	ret = bma150_setup_input_device(bma150);
+	if (ret < 0)
+		goto kfree_exit;
+
+	pm_runtime_set_active(&client->dev);
+	pm_runtime_enable(&client->dev);
+
+	dev_info(&client->dev, "Registered BMA150 I2C driver\n");
+	return 0;
+
+kfree_exit:
+	kfree(bma150);
+	return ret;
+}
+
+#if defined(CONFIG_PM) || defined(CONFIG_PM_RUNTIME)
+static int bma150_suspend(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+
+	return bma150_set_mode(client, BMA150_MODE_SLEEP);
+}
+
+static int bma150_resume(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	return bma150_set_mode(client, BMA150_MODE_NORMAL);
+}
+#endif
+
+static int bma150_remove(struct i2c_client *client)
+{
+	struct bma150_data *bma150 = i2c_get_clientdata(client);
+
+	bma150_free_input_device(bma150);
+	kfree(bma150);
+
+	return 0;
+}
+
+static const struct dev_pm_ops bma150_pm = {
+	SET_SYSTEM_SLEEP_PM_OPS(bma150_suspend, bma150_resume)
+	SET_RUNTIME_PM_OPS(bma150_suspend, bma150_resume, NULL)
+};
+
+static const struct i2c_device_id bma150_id[] = {
+	{ "bma150", 0 },
+	{ "smb380", 0 },
+	{ "bma023", 0 },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(i2c, bma150_id);
+
+static struct i2c_driver bma150_driver = {
+	.driver = {
+		.owner	= THIS_MODULE,
+		.name	= BMA150_DRIVER,
+		.pm	= &bma150_pm,
+	},
+	.class          = I2C_CLASS_HWMON,
+	.id_table	= bma150_id,
+	.probe		= bma150_probe,
+	.remove		= __devexit_p(bma150_remove),
+};
+
+static int __init BMA150_init(void)
+{
+	return i2c_add_driver(&bma150_driver);
+}
+
+static void __exit BMA150_exit(void)
+{
+	i2c_del_driver(&bma150_driver);
+}
+
+MODULE_AUTHOR("Albert Zhang <xu.zhang@xxxxxxxxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("BMA150 driver");
+MODULE_LICENSE("GPL");
+
+module_init(BMA150_init);
+module_exit(BMA150_exit);
+
diff --git a/include/linux/bma150.h b/include/linux/bma150.h
new file mode 100644
index 0000000..3a582db
--- /dev/null
+++ b/include/linux/bma150.h
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2011 Bosch Sensortec GmbH
+ * Copyright (c) 2011 Unixphere
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef _BMA150_H_
+#define _BMA150_H_
+
+#define BMA150_DRIVER		"bma150"
+
+/* Data register addresses */
+#define BMA150_DATA_0_REG	0x00
+#define BMA150_DATA_1_REG	0x01
+#define BMA150_DATA_2_REG	0x02
+/* Control register addresses */
+#define BMA150_CTRL_0_REG	0x0A
+#define BMA150_CTRL_1_REG	0x0B
+#define BMA150_CTRL_2_REG	0x14
+#define BMA150_CTRL_3_REG	0x15
+/* Configuration/Setting register addresses */
+#define BMA150_CFG_0_REG	0x0C
+#define BMA150_CFG_1_REG	0x0D
+#define BMA150_CFG_2_REG	0x0E
+#define BMA150_CFG_3_REG	0x0F
+#define BMA150_CFG_4_REG	0x10
+#define BMA150_CFG_5_REG	0x11
+
+struct bma150_cfg {
+	unsigned char range;		/* BMA0150_RANGE_xxx */
+	unsigned char bandwidth;	/* BMA0150_BW_xxx */
+	unsigned char any_motion_int;	/* Set to enable any-motion interrupt */
+	unsigned char hg_int;		/* Set to enable high-G interrupt */
+	unsigned char lg_int;		/* Set to enable low-G interrupt */
+	unsigned char any_motion_dur;	/* Any-motion duration */
+	unsigned char any_motion_thres;	/* Any-motion threshold */
+	unsigned char hg_hyst;		/* High-G hysterisis */
+	unsigned char hg_dur;		/* High-G duration */
+	unsigned char hg_thres;		/* High-G threshold */
+	unsigned char lg_hyst;		/* Low-G hysterisis */
+	unsigned char lg_dur;		/* Low-G duration */
+	unsigned char lg_thres;		/* Low-G threshold */
+};
+
+struct bma150_platform_data {
+	struct bma150_cfg cfg;
+	int (*irq_gpio_cfg)(void);
+};
+
+#endif /* _BMA150_H_ */
+
-- 
1.7.3.4

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