Message-ID: <4E31197E.7040600@cam.ac.uk>
Date:	Thu, 28 Jul 2011 09:10:38 +0100
From:	Jonathan Cameron <jic23@....ac.uk>
To:	Eric Andersson <eric.andersson@...xphere.com>
CC:	dmitry.torokhov@...il.com, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org, zhengguang.guo@...ch-sensortec.com,
	stefan.nilsson@...xphere.com, alan@...rguk.ukuu.org.uk,
	Albert Zhang <xu.zhang@...ch-sensortec.com>
Subject: Re: [PATCH v6 1/1] input: add driver for Bosch Sensortec's BMA150
 accelerometer

Looks good.
> Signed-off-by: Albert Zhang <xu.zhang@...ch-sensortec.com>
> Signed-off-by: Eric Andersson <eric.andersson@...xphere.com>
Acked-by: Jonathan Cameron <jic23@....ac.uk>
> ---
>  drivers/input/misc/Kconfig  |   11 +
>  drivers/input/misc/Makefile |    1 +
>  drivers/input/misc/bma150.c |  654 +++++++++++++++++++++++++++++++++++++++++++
>  include/linux/bma150.h      |   47 +++
>  4 files changed, 713 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 c9104bb..4493241 100644
> --- a/drivers/input/misc/Kconfig
> +++ b/drivers/input/misc/Kconfig
> @@ -527,4 +527,15 @@ 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 299ad5e..505a398 100644
> --- a/drivers/input/misc/Makefile
> +++ b/drivers/input/misc/Makefile
> @@ -49,3 +49,4 @@ 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..4789ff6
> --- /dev/null
> +++ b/drivers/input/misc/bma150.c
> @@ -0,0 +1,654 @@
> +/*
> + * 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
> +
> +/* 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
> +
> +#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 input_polled_dev *input_polled;
> +	struct input_dev *input;
> +};
> +
> +/*
> + * 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 struct bma150_cfg default_cfg __initdata = {
> +	.any_motion_int = 1,
> +	.hg_int = 1,
> +	.lg_int = 1,
> +	.any_motion_dur = 0,
> +	.any_motion_thres = 0,
> +	.hg_hyst = 0,
> +	.hg_dur = 150,
> +	.hg_thres = 160,
> +	.lg_hyst = 0,
> +	.lg_dur = 150,
> +	.lg_thres = 20,
> +	.range = BMA150_RANGE_2G,
> +	.bandwidth = BMA150_BW_50HZ
> +};
> +
> +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_set_mode(struct i2c_client *client, u8 mode)
> +{
> +	s32 ret;
> +
> +	ret = bma150_set_reg_bits(client, mode, BMA150_WAKE_UP_POS,
> +				BMA150_WAKE_UP_MSK, BMA150_WAKE_UP_REG);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = bma150_set_reg_bits(client, mode, BMA150_SLEEP_POS,
> +				BMA150_SLEEP_MSK, BMA150_SLEEP_REG);
> +	if (ret < 0)
> +		return ret;
> +
> +	if (mode == BMA150_MODE_NORMAL)
> +		msleep(2);
> +	return ret;
> +}
> +
> +static int __devinit bma150_soft_reset(struct i2c_client *client)
> +{
> +	s32 ret;
> +
> +	ret = bma150_set_reg_bits(client, 1, BMA150_SW_RES_POS,
> +			BMA150_SW_RES_MSK, BMA150_SW_RES_REG);
> +	msleep(2);
> +	return ret;
> +}
> +
> +static int __devinit bma150_set_range(struct i2c_client *client, u8 range)
> +{
> +	s32 ret;
> +
> +	ret = bma150_set_reg_bits(client, range, BMA150_RANGE_POS,
> +				BMA150_RANGE_MSK, BMA150_RANGE_REG);
> +	return ret;
> +}
> +
> +static int __devinit bma150_set_bandwidth(struct i2c_client *client, u8 bw)
> +{
> +	s32 ret;
> +
> +	ret = bma150_set_reg_bits(client, bw, BMA150_BANDWIDTH_POS,
> +				BMA150_BANDWIDTH_MSK, BMA150_BANDWIDTH_REG);
> +	return ret;
> +}
> +
> +static int __devinit 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);
> +
> +	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)
> +		return ret;
> +
> +	ret = bma150_write_byte(bma150->client,	BMA150_LOW_G_DUR_REG, dur);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = bma150_write_byte(bma150->client,	BMA150_LOW_G_THRES_REG, thres);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = bma150_set_reg_bits(bma150->client, !!enable,
> +				BMA150_LOW_G_EN_POS, BMA150_LOW_G_EN_MSK,
> +				BMA150_LOW_G_EN_REG);
> +	return ret;
> +}
> +
> +static int __devinit 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);
> +
> +	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)
> +		return ret;
> +
> +	ret = bma150_write_byte(bma150->client,	BMA150_HIGH_G_DUR_REG, dur);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = bma150_write_byte(bma150->client,	BMA150_HIGH_G_THRES_REG, thres);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = bma150_set_reg_bits(bma150->client, !!enable,
> +				BMA150_HIGH_G_EN_POS, BMA150_HIGH_G_EN_MSK,
> +				BMA150_HIGH_G_EN_REG);
> +	return ret;
> +}
> +
> +
> +static int __devinit 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);
> +
> +	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)
> +		return ret;
> +
> +	ret = bma150_write_byte(bma150->client,
> +				BMA150_ANY_MOTION_THRES_REG, thres);
> +	if (ret < 0)
> +		return ret;
> +
> +	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)
> +		return ret;
> +
> +	ret = bma150_set_reg_bits(bma150->client, !!enable,
> +				BMA150_ANY_MOTION_EN_POS,
> +				BMA150_ANY_MOTION_EN_MSK,
> +				BMA150_ANY_MOTION_EN_REG);
> +	return ret;
> +}
> +
> +static void bma150_report_xyz(struct bma150_data *bma150)
> +{
> +	u8 data[BMA150_XYZ_DATA_SIZE];
> +	s16 x, y, z;
> +	s32 ret;
> +
> +	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;
> +
> +	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)
> +{
> +	int ret;
> +
> +	ret = pm_runtime_set_active(&bma150->client->dev);
> +	if (ret < 0)
> +		return ret;
> +
> +	pm_runtime_enable(&bma150->client->dev);
> +
> +	return bma150_set_mode(bma150->client, BMA150_MODE_NORMAL);
> +}
> +
> +static void bma150_close(struct bma150_data *bma150)
> +{
> +	pm_runtime_disable(&bma150->client->dev);
> +	pm_runtime_set_suspended(&bma150->client->dev);
> +	bma150_set_mode(bma150->client, BMA150_MODE_SLEEP);
> +}
> +
> +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 __devinit bma150_initialize(struct i2c_client *client,
> +				       struct bma150_cfg *cfg)
> +{
> +	s32 ret;
> +
> +	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 int __devinit 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;
> +
> +	idev->evbit[0] = BIT_MASK(EV_ABS);
> +	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 | IRQF_ONESHOT,
> +			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_cfg *cfg;
> +	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) {
> +		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;
> +		}
> +		cfg = &pdata->cfg;
> +	} else {
> +		cfg = &default_cfg;
> +	}
> +	ret = bma150_initialize(client, cfg);
> +	if (ret < 0)
> +		goto kfree_exit;
> +
> +	ret = bma150_setup_input_device(bma150);
> +	if (ret < 0)
> +		goto kfree_exit;
> +
> +	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 __devexit bma150_remove(struct i2c_client *client)
> +{
> +	struct bma150_data *bma150 = i2c_get_clientdata(client);
> +
> +	pm_runtime_disable(&bma150->client->dev);
> +	bma150_free_input_device(bma150);
> +	kfree(bma150);
> +	return 0;
> +}
> +
> +static UNIVERSAL_DEV_PM_OPS(bma150_pm, 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@...ch-sensortec.com>");
> +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..7a8bbce
> --- /dev/null
> +++ b/include/linux/bma150.h
> @@ -0,0 +1,47 @@
> +/*
> + * 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"
> +
> +struct bma150_cfg {
> +	bool any_motion_int;		/* Set to enable any-motion interrupt */
> +	bool hg_int;			/* Set to enable high-G interrupt */
> +	bool 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 */
> +	unsigned char range;		/* BMA0150_RANGE_xxx (in G) */
> +	unsigned char bandwidth;	/* BMA0150_BW_xxx (in Hz) */
> +};
> +
> +struct bma150_platform_data {
> +	struct bma150_cfg cfg;
> +	int (*irq_gpio_cfg)(void);
> +};
> +
> +#endif /* _BMA150_H_ */
> +

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