[PATCH] input: CMA3000 Accelerometer Driver

From: Hemanth V
Date: Thu Aug 26 2010 - 08:14:48 EST

Next message: Hemanth V: "[PATCH] Platform changes for CMA3000 Accelerometer driver"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Add support for CMA3000 Tri-axis accelerometer, which
supports Motion detect, Measurement and Free fall modes.
CMA3000 supports both I2C/SPI bus for communication, currently the
driver supports I2C based communication.

Driver reports acceleration data through input subsystem

Signed-off-by: Hemanth V <hemanthv@xxxxxx>
Reviewed-by: Jonathan Cameron <jic23@xxxxxxxxx>
Reviewed-by: Sergio Aguirre <saaguirre@xxxxxx>
Reviewed-by: Shubhrajyoti <Shubhrajyoti@xxxxxx>
---
This is V4 of patch, which currently doesnot support a
sysfs interface. Discussions are ongoing to create a
standard sysfs interface for sensors under input subsystem.
This interface would be adopted by the driver subsequently.

Documentation/input/cma3000_d0x.txt | 115 ++++++++++++
drivers/input/misc/Kconfig | 24 +++
drivers/input/misc/Makefile | 2 +
drivers/input/misc/cma3000_d0x.c | 334 ++++++++++++++++++++++++++++++++++
drivers/input/misc/cma3000_d0x.h | 53 ++++++
drivers/input/misc/cma3000_d0x_i2c.c | 142 ++++++++++++++
include/linux/input/cma3000.h | 60 ++++++
7 files changed, 730 insertions(+), 0 deletions(-)
create mode 100644 Documentation/input/cma3000_d0x.txt
create mode 100644 drivers/input/misc/cma3000_d0x.c
create mode 100644 drivers/input/misc/cma3000_d0x.h
create mode 100644 drivers/input/misc/cma3000_d0x_i2c.c
create mode 100644 include/linux/input/cma3000.h

diff --git a/Documentation/input/cma3000_d0x.txt b/Documentation/input/cma3000_d0x.txt
new file mode 100644
index 0000000..9cc46af
--- /dev/null
+++ b/Documentation/input/cma3000_d0x.txt
@@ -0,0 +1,115 @@
+Kernel driver for CMA3000-D0x
+============================
+
+Supported chips:
+* VTI CMA3000-D0x
+Datasheet:
+ CMA3000-D0X Product Family Specification 8281000A.02.pdf
+ <http://www.vti.fi/en/>
+
+Author: Hemanth V <hemanthv@xxxxxx>
+
+
+Description
+-----------
+CMA3000 Tri-axis accelerometer supports Motion detect, Measurement and
+Free fall modes.
+
+Motion Detect Mode: Its the low power mode where interrupts are generated only
+when motion exceeds the defined thresholds.
+
+Measurement Mode: This mode is used to read the acceleration data on X,Y,Z
+axis and supports 400, 100, 40 Hz sample frequency.
+
+Free fall Mode: This mode is intented to save system resources.
+
+Threshold values: Chip supports defining threshold values for above modes
+which includes time and g value. Refer product specifications for more details.
+
+CMA3000 chip supports mutually exclusive I2C and SPI interfaces for
+communication, currently the driver supports I2C based communication only.
+Initial configuration for bus mode is set in non volatile memory and can later
+be modified through bus interface command.
+
+Driver reports acceleration data through input subsystem. It generates ABS_MISC
+event with value 1 when free fall is detected.
+
+Platform data need to be configured for initial default values.
+
+Platform Data
+-------------
+fuzz_x: Noise on X Axis
+
+fuzz_y: Noise on Y Axis
+
+fuzz_z: Noise on Z Axis
+
+g_range: G range in milli g i.e 2000 or 8000
+
+mode: Default Operating mode
+
+mdthr: Motion detect g range threshold value
+
+mdfftmr: Motion detect and free fall time threshold value
+
+ffthr: Free fall g range threshold value
+
+Input Interface
+--------------
+Input driver version is 1.0.0
+Input device ID: bus 0x18 vendor 0x0 product 0x0 version 0x0
+Input device name: "cma3000-accelerometer"
+Supported events:
+ Event type 0 (Sync)
+ Event type 3 (Absolute)
+ Event code 0 (X)
+ Value 47
+ Min -8000
+ Max 8000
+ Fuzz 200
+ Event code 1 (Y)
+ Value -28
+ Min -8000
+ Max 8000
+ Fuzz 200
+ Event code 2 (Z)
+ Value 905
+ Min -8000
+ Max 8000
+ Fuzz 200
+ Event code 40 (Misc)
+ Value 0
+ Min 0
+ Max 1
+ Event type 4 (Misc)
+
+
+Register/Platform parameters Description
+----------------------------------------
+
+mode:
+ 0: power down mode
+ 1: 100 Hz Measurement mode
+ 2: 400 Hz Measurement mode
+ 3: 40 Hz Measurement mode
+ 4: Motion Detect mode (default)
+ 5: 100 Hz Free fall mode
+ 6: 40 Hz Free fall mode
+ 7: Power off mode
+
+grange:
+ 2000: 2000 mg or 2G Range
+ 8000: 8000 mg or 8G Range
+
+mdthr:
+ X: X * 71mg (8G Range)
+ X: X * 18mg (2G Range)
+
+mdfftmr:
+ X: (X & 0x70) * 100 ms (MDTMR)
+ (X & 0x0F) * 2.5 ms (FFTMR 400 Hz)
+ (X & 0x0F) * 10 ms (FFTMR 100 Hz)
+
+ffthr:
+ X: (X >> 2) * 18mg (2G Range)
+ X: (X & 0x0F) * 71 mg (8G Range)
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index b99b8cb..d5e5fd6 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -448,4 +448,28 @@ config INPUT_ADXL34X_SPI
To compile this driver as a module, choose M here: the
module will be called adxl34x-spi.

+config INPUT_CMA3000
+ tristate "VTI CMA3000 Tri-axis accelerometer"
+ help
+ Say Y here if you want to use VTI CMA3000_D0x Accelerometer
+ driver
+
+ This driver currently only supports I2C interface to the
+ controller. Also select the I2C method.
+
+ If unsure, say N
+
+ To compile this driver as a module, choose M here: the
+ module will be called cma3000_d0x.
+
+config INPUT_CMA3000_I2C
+ tristate "Support I2C bus connection"
+ depends on INPUT_CMA3000 && I2C
+ help
+ Say Y here if you want to use VTI CMA3000_D0x Accelerometer
+ through I2C interface.
+
+ To compile this driver as a module, choose M here: the
+ module will be called cma3000_d0x_i2c.
+
endif
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 1fe1f6c..35bcfe4 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -18,6 +18,8 @@ obj-$(CONFIG_INPUT_ATI_REMOTE2) += ati_remote2.o
obj-$(CONFIG_INPUT_ATLAS_BTNS) += atlas_btns.o
obj-$(CONFIG_INPUT_BFIN_ROTARY) += bfin_rotary.o
obj-$(CONFIG_INPUT_CM109) += cm109.o
+obj-$(CONFIG_INPUT_CMA3000) += cma3000_d0x.o
+obj-$(CONFIG_INPUT_CMA3000_I2C) += cma3000_d0x_i2c.o
obj-$(CONFIG_INPUT_COBALT_BTNS) += cobalt_btns.o
obj-$(CONFIG_INPUT_DM355EVM) += dm355evm_keys.o
obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o
diff --git a/drivers/input/misc/cma3000_d0x.c b/drivers/input/misc/cma3000_d0x.c
new file mode 100644
index 0000000..158add9
--- /dev/null
+++ b/drivers/input/misc/cma3000_d0x.c
@@ -0,0 +1,334 @@
+/*
+ * cma3000_d0x.c
+ * VTI CMA3000_D0x Accelerometer driver
+ * Supports I2C interface
+ *
+ * Copyright (C) 2010 Texas Instruments
+ * Author: Hemanth V <hemanthv@xxxxxx>
+ *
+ * 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/>.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/input.h>
+#include <linux/platform_device.h>
+#include <linux/input/cma3000.h>
+
+#include "cma3000_d0x.h"
+
+#define CMA3000_WHOAMI 0x00
+#define CMA3000_REVID 0x01
+#define CMA3000_CTRL 0x02
+#define CMA3000_STATUS 0x03
+#define CMA3000_RSTR 0x04
+#define CMA3000_INTSTATUS 0x05
+#define CMA3000_DOUTX 0x06
+#define CMA3000_DOUTY 0x07
+#define CMA3000_DOUTZ 0x08
+#define CMA3000_MDTHR 0x09
+#define CMA3000_MDFFTMR 0x0A
+#define CMA3000_FFTHR 0x0B
+
+#define CMA3000_RANGE2G (1 << 7)
+#define CMA3000_RANGE8G (0 << 7)
+#define CMA3000_BUSI2C (0 << 4)
+#define CMA3000_MODEMASK (7 << 1)
+#define CMA3000_GRANGEMASK (1 << 7)
+
+#define CMA3000_STATUS_PERR 1
+#define CMA3000_INTSTATUS_FFDET (1 << 2)
+
+/* Settling time delay in ms */
+#define CMA3000_SETDELAY 30
+
+/* Delay for clearing interrupt in us */
+#define CMA3000_INTDELAY 44
+
+
+/*
+ * Bit weights in mg for bit 0, other bits need
+ * multipy factor 2^n. Eight bit is the sign bit.
+ */
+#define BIT_TO_2G 18
+#define BIT_TO_8G 71
+
+#define CMA3000_READ(data, reg, msg) \
+ ((data)->bus_ops->read(data, reg, msg))
+#define CMA3000_SET(data, reg, val, msg) \
+ ((data)->bus_ops->write(data, reg, val, msg))
+/*
+ * Conversion for each of the eight modes to g, depending
+ * on G range i.e 2G or 8G. Some modes always operate in
+ * 8G.
+ */
+
+static int mode_to_mg[8][2] = {
+ {0, 0},
+ {BIT_TO_8G, BIT_TO_2G},
+ {BIT_TO_8G, BIT_TO_2G},
+ {BIT_TO_8G, BIT_TO_8G},
+ {BIT_TO_8G, BIT_TO_8G},
+ {BIT_TO_8G, BIT_TO_2G},
+ {BIT_TO_8G, BIT_TO_2G},
+ {0, 0},
+};
+
+static void decode_mg(struct cma3000_accl_data *data, int *datax,
+ int *datay, int *dataz)
+{
+ /* Data in 2's complement, convert to mg */
+ *datax = (((s8)(*datax)) * (data->bit_to_mg));
+ *datay = (((s8)(*datay)) * (data->bit_to_mg));
+ *dataz = (((s8)(*dataz)) * (data->bit_to_mg));
+}
+
+static irqreturn_t cma3000_thread_irq(int irq, void *dev_id)
+{
+ struct cma3000_accl_data *data = dev_id;
+ int datax, datay, dataz;
+ u8 ctrl, mode, range, intr_status;
+
+ intr_status = CMA3000_READ(data, CMA3000_INTSTATUS, "interrupt status");
+ if (intr_status < 0)
+ return IRQ_NONE;
+
+ /* Check if free fall is detected, report immediately */
+ if (intr_status & CMA3000_INTSTATUS_FFDET) {
+ input_report_abs(data->input_dev, ABS_MISC, 1);
+ input_sync(data->input_dev);
+ } else {
+ input_report_abs(data->input_dev, ABS_MISC, 0);
+ }
+
+ datax = CMA3000_READ(data, CMA3000_DOUTX, "X");
+ datay = CMA3000_READ(data, CMA3000_DOUTY, "Y");
+ dataz = CMA3000_READ(data, CMA3000_DOUTZ, "Z");
+
+ ctrl = CMA3000_READ(data, CMA3000_CTRL, "ctrl");
+ mode = (ctrl & CMA3000_MODEMASK) >> 1;
+ range = (ctrl & CMA3000_GRANGEMASK) >> 7;
+
+ data->bit_to_mg = mode_to_mg[mode][range];
+
+ /* Interrupt not for this device */
+ if (data->bit_to_mg == 0)
+ return IRQ_NONE;
+
+ /* Decode register values to milli g */
+ decode_mg(data, &datax, &datay, &dataz);
+
+ input_report_abs(data->input_dev, ABS_X, datax);
+ input_report_abs(data->input_dev, ABS_Y, datay);
+ input_report_abs(data->input_dev, ABS_Z, dataz);
+ input_sync(data->input_dev);
+
+ return IRQ_HANDLED;
+}
+
+static int cma3000_reset(struct cma3000_accl_data *data)
+{
+ int ret;
+
+ /* Reset sequence */
+ CMA3000_SET(data, CMA3000_RSTR, 0x02, "Reset");
+ CMA3000_SET(data, CMA3000_RSTR, 0x0A, "Reset");
+ CMA3000_SET(data, CMA3000_RSTR, 0x04, "Reset");
+
+ /* Settling time delay */
+ mdelay(10);
+
+ ret = CMA3000_READ(data, CMA3000_STATUS, "Status");
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Reset failed\n");
+ return ret;
+ } else if (ret & CMA3000_STATUS_PERR) {
+ dev_err(&data->client->dev, "Parity Error\n");
+ return -EIO;
+ } else {
+ return 0;
+ }
+}
+
+int cma3000_poweron(struct cma3000_accl_data *data)
+{
+ uint8_t ctrl = 0, mdthr, mdfftmr, ffthr, mode;
+ int g_range, ret;
+
+ g_range = data->pdata.g_range;
+ mode = data->pdata.mode;
+ mdthr = data->pdata.mdthr;
+ mdfftmr = data->pdata.mdfftmr;
+ ffthr = data->pdata.ffthr;
+
+ if (mode < CMAMODE_DEFAULT || mode > CMAMODE_POFF) {
+ data->pdata.mode = CMAMODE_MOTDET;
+ mode = data->pdata.mode;
+ dev_info(&data->client->dev,
+ "Invalid mode specified, assuming Motion Detect\n");
+ }
+
+ if (g_range == CMARANGE_2G) {
+ ctrl = (mode << 1) | CMA3000_RANGE2G;
+ } else if (g_range == CMARANGE_8G) {
+ ctrl = (mode << 1) | CMA3000_RANGE8G;
+ } else {
+ dev_info(&data->client->dev,
+ "Invalid G range specified, assuming 8G\n");
+ ctrl = (mode << 1) | CMA3000_RANGE8G;
+ data->pdata.g_range = CMARANGE_8G;
+ }
+#if defined CONFIG_INPUT_CMA3000_I2C || defined CONFIG_INPUT_CMA3000_I2C_MODULE
+ ctrl |= CMA3000_BUSI2C;
+#endif
+
+ CMA3000_SET(data, CMA3000_MDTHR, mdthr, "Motion Detect Threshold");
+ CMA3000_SET(data, CMA3000_MDFFTMR, mdfftmr, "Time register");
+ CMA3000_SET(data, CMA3000_FFTHR, ffthr, "Free fall threshold");
+ ret = CMA3000_SET(data, CMA3000_CTRL, ctrl, "Mode setting");
+ if (ret < 0)
+ return -EIO;
+
+ msleep(CMA3000_SETDELAY);
+
+ return 0;
+}
+EXPORT_SYMBOL(cma3000_poweron);
+
+int cma3000_poweroff(struct cma3000_accl_data *data)
+{
+ int ret;
+
+ ret = CMA3000_SET(data, CMA3000_CTRL, CMAMODE_POFF, "Mode setting");
+ msleep(CMA3000_SETDELAY);
+
+ return ret;
+}
+EXPORT_SYMBOL(cma3000_poweroff);
+
+int cma3000_init(struct cma3000_accl_data *data)
+{
+ int ret = 0, fuzz_x, fuzz_y, fuzz_z, g_range;
+ uint32_t irqflags;
+
+ if (data->client->dev.platform_data == NULL) {
+ dev_err(&data->client->dev, "platform data not found\n");
+ ret = -EINVAL;
+ goto err_op1_failed;
+ }
+
+ /* if no IRQ return error */
+ if (data->client->irq == 0) {
+ ret = -EINVAL;
+ goto err_op1_failed;
+ }
+
+ memcpy(&(data->pdata), data->client->dev.platform_data,
+ sizeof(struct cma3000_platform_data));
+
+ ret = cma3000_reset(data);
+ if (ret)
+ goto err_op1_failed;
+
+ ret = CMA3000_READ(data, CMA3000_REVID, "Revid");
+ if (ret < 0)
+ goto err_op1_failed;
+
+ pr_info("CMA3000 Accelerometer : Revision %x\n", ret);
+
+ /* Bring it out of default power down state */
+ ret = cma3000_poweron(data);
+ if (ret < 0)
+ goto err_op1_failed;
+
+ fuzz_x = data->pdata.fuzz_x;
+ fuzz_y = data->pdata.fuzz_y;
+ fuzz_z = data->pdata.fuzz_z;
+ g_range = data->pdata.g_range;
+ irqflags = data->pdata.irqflags;
+
+ 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 err_op1_failed;
+ }
+
+ data->input_dev->name = "cma3000-accelerometer";
+
+#if defined CONFIG_INPUT_CMA3000_I2C || defined CONFIG_INPUT_CMA3000_I2C_MODULE
+ data->input_dev->id.bustype = BUS_I2C;
+#endif
+
+ __set_bit(EV_ABS, data->input_dev->evbit);
+ __set_bit(EV_MSC, data->input_dev->evbit);
+
+ input_set_abs_params(data->input_dev, ABS_X, -g_range,
+ g_range, fuzz_x, 0);
+ input_set_abs_params(data->input_dev, ABS_Y, -g_range,
+ g_range, fuzz_y, 0);
+ input_set_abs_params(data->input_dev, ABS_Z, -g_range,
+ g_range, fuzz_z, 0);
+ input_set_abs_params(data->input_dev, ABS_MISC, 0,
+ 1, 0, 0);
+
+ mutex_init(&data->mutex);
+
+ ret = request_threaded_irq(data->client->irq, NULL,
+ cma3000_thread_irq,
+ irqflags | IRQF_ONESHOT,
+ data->client->name, data);
+
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "request_threaded_irq failed\n");
+ goto err_op2_failed;
+ }
+
+ ret = input_register_device(data->input_dev);
+ if (ret) {
+ dev_err(&data->client->dev,
+ "Unable to register input device\n");
+ goto err_op3_failed;
+ }
+
+ return 0;
+
+err_op3_failed:
+ free_irq(data->client->irq, data);
+err_op2_failed:
+ mutex_destroy(&data->mutex);
+err_op1_failed:
+ input_free_device(data->input_dev);
+
+ return ret;
+}
+EXPORT_SYMBOL(cma3000_init);
+
+int cma3000_exit(struct cma3000_accl_data *data)
+{
+ int ret;
+
+ ret = cma3000_poweroff(data);
+ free_irq(data->client->irq, data);
+ mutex_destroy(&data->mutex);
+ input_unregister_device(data->input_dev);
+
+ return ret;
+}
+EXPORT_SYMBOL(cma3000_exit);
+
+MODULE_DESCRIPTION("CMA3000-D0x Accelerometer Driver");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Hemanth V <hemanthv@xxxxxx>");
diff --git a/drivers/input/misc/cma3000_d0x.h b/drivers/input/misc/cma3000_d0x.h
new file mode 100644
index 0000000..107b5fa
--- /dev/null
+++ b/drivers/input/misc/cma3000_d0x.h
@@ -0,0 +1,53 @@
+/*
+ * cma3000_d0x.h
+ * VTI CMA3000_D0x Accelerometer driver
+ *
+ * Copyright (C) 2010 Texas Instruments
+ * Author: Hemanth V <hemanthv@xxxxxx>
+ *
+ * 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 _INPUT_CMA3000_H
+#define _INPUT_CMA3000_H
+
+#include <linux/i2c.h>
+#include <linux/input.h>
+
+struct cma3000_accl_data;
+
+struct cma3000_bus_ops {
+ u16 bustype;
+ int (*read) (struct cma3000_accl_data *, u8, char *);
+ int (*write) (struct cma3000_accl_data *, u8, u8, char *);
+};
+
+struct cma3000_accl_data {
+#if defined CONFIG_INPUT_CMA3000_I2C || defined CONFIG_INPUT_CMA3000_I2C_MODULE
+ struct i2c_client *client;
+#endif
+ struct input_dev *input_dev;
+ struct cma3000_platform_data pdata;
+
+ /* mutex for sysfs operations */
+ struct mutex mutex;
+ const struct cma3000_bus_ops *bus_ops;
+ int bit_to_mg;
+};
+
+int cma3000_init(struct cma3000_accl_data *);
+int cma3000_exit(struct cma3000_accl_data *);
+int cma3000_poweron(struct cma3000_accl_data *);
+int cma3000_poweroff(struct cma3000_accl_data *);
+
+#endif
diff --git a/drivers/input/misc/cma3000_d0x_i2c.c b/drivers/input/misc/cma3000_d0x_i2c.c
new file mode 100644
index 0000000..f843478
--- /dev/null
+++ b/drivers/input/misc/cma3000_d0x_i2c.c
@@ -0,0 +1,142 @@
+/*
+ * cma3000_d0x_i2c.c
+ *
+ * Implements I2C interface for VTI CMA300_D0x Accelerometer driver
+ *
+ * Copyright (C) 2010 Texas Instruments
+ * Author: Hemanth V <hemanthv@xxxxxx>
+ *
+ * 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/>.
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/input/cma3000.h>
+#include "cma3000_d0x.h"
+
+static int cma3000_set(struct cma3000_accl_data *accl, u8 reg, u8 val,
+ char *msg)
+{
+ int ret = i2c_smbus_write_byte_data(accl->client, reg, val);
+ if (ret < 0)
+ dev_err(&accl->client->dev,
+ "i2c_smbus_write_byte_data failed (%s)\n", msg);
+ return ret;
+}
+
+static int cma3000_read(struct cma3000_accl_data *accl, u8 reg, char *msg)
+{
+ int ret = i2c_smbus_read_byte_data(accl->client, reg);
+ if (ret < 0)
+ dev_err(&accl->client->dev,
+ "i2c_smbus_read_byte_data failed (%s)\n", msg);
+ return ret;
+}
+
+static const struct cma3000_bus_ops cma3000_i2c_bops = {
+ .bustype = BUS_I2C,
+ .read = cma3000_read,
+ .write = cma3000_set,
+};
+
+static int __devinit cma3000_accl_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret;
+ struct cma3000_accl_data *data = NULL;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (data == NULL) {
+ ret = -ENOMEM;
+ goto err_op_failed;
+ }
+
+ data->client = client;
+ i2c_set_clientdata(client, data);
+ data->bus_ops = &cma3000_i2c_bops;
+
+ ret = cma3000_init(data);
+ if (ret)
+ goto err_op_failed;
+
+ return 0;
+
+err_op_failed:
+
+ kfree(data);
+ return ret;
+}
+
+static int __devexit cma3000_accl_remove(struct i2c_client *client)
+{
+ struct cma3000_accl_data *data = i2c_get_clientdata(client);
+ int ret;
+
+ ret = cma3000_exit(data);
+ i2c_set_clientdata(client, NULL);
+ kfree(data);
+
+ return ret;
+}
+
+#ifdef CONFIG_PM
+static int cma3000_accl_suspend(struct i2c_client *client, pm_message_t mesg)
+{
+ struct cma3000_accl_data *data = i2c_get_clientdata(client);
+
+ return cma3000_poweroff(data);
+}
+
+static int cma3000_accl_resume(struct i2c_client *client)
+{
+ struct cma3000_accl_data *data = i2c_get_clientdata(client);
+
+ return cma3000_poweron(data);
+}
+#endif
+
+static const struct i2c_device_id cma3000_id[] = {
+ { "cma3000_d01", 0 },
+ { },
+};
+
+static struct i2c_driver cma3000_accl_driver = {
+ .probe = cma3000_accl_probe,
+ .remove = cma3000_accl_remove,
+ .id_table = cma3000_id,
+#ifdef CONFIG_PM
+ .suspend = cma3000_accl_suspend,
+ .resume = cma3000_accl_resume,
+#endif
+ .driver = {
+ .name = "cma3000_accl"
+ },
+};
+
+static int __init cma3000_accl_init(void)
+{
+ return i2c_add_driver(&cma3000_accl_driver);
+}
+
+static void __exit cma3000_accl_exit(void)
+{
+ i2c_del_driver(&cma3000_accl_driver);
+}
+
+module_init(cma3000_accl_init);
+module_exit(cma3000_accl_exit);
+
+MODULE_DESCRIPTION("CMA3000-D0x Accelerometer Driver");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Hemanth V <hemanthv@xxxxxx>");
diff --git a/include/linux/input/cma3000.h b/include/linux/input/cma3000.h
new file mode 100644
index 0000000..fcddece
--- /dev/null
+++ b/include/linux/input/cma3000.h
@@ -0,0 +1,60 @@
+/*
+ * cma3000.h
+ * VTI CMA3000_Dxx Accelerometer driver
+ *
+ * Copyright (C) 2010 Texas Instruments
+ * Author: Hemanth V <hemanthv@xxxxxx>
+ *
+ * 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_CMA3000_H
+#define _LINUX_CMA3000_H
+
+#define CMAMODE_DEFAULT 0
+#define CMAMODE_MEAS100 1
+#define CMAMODE_MEAS400 2
+#define CMAMODE_MEAS40 3
+#define CMAMODE_MOTDET 4
+#define CMAMODE_FF100 5
+#define CMAMODE_FF400 6
+#define CMAMODE_POFF 7
+
+#define CMARANGE_2G 2000
+#define CMARANGE_8G 8000
+
+/**
+ * struct cma3000_i2c_platform_data - CMA3000 Platform data
+ * @fuzz_x: Noise on X Axis
+ * @fuzz_y: Noise on Y Axis
+ * @fuzz_z: Noise on Z Axis
+ * @g_range: G range in milli g i.e 2000 or 8000
+ * @mode: Operating mode
+ * @mdthr: Motion detect threshold value
+ * @mdfftmr: Motion detect and free fall time value
+ * @ffthr: Free fall threshold value
+ */
+
+struct cma3000_platform_data {
+ int fuzz_x;
+ int fuzz_y;
+ int fuzz_z;
+ int g_range;
+ uint8_t mode;
+ uint8_t mdthr;
+ uint8_t mdfftmr;
+ uint8_t ffthr;
+ uint32_t irqflags;
+};
+
+#endif
--
1.5.4.3

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

Next message: Hemanth V: "[PATCH] Platform changes for CMA3000 Accelerometer driver"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]