[PATCH 3/3] drivers/misc: remove bmp085 driver
From: Eric Andersson
Date: Wed Feb 29 2012 - 15:05:08 EST
Removed the bmp085 driver since it is obsoleted by the bmp18x driver.
Signed-off-by: Eric Andersson <eric.andersson@xxxxxxxxxxxxx>
---
Documentation/ABI/testing/sysfs-i2c-bmp085 | 31 --
drivers/misc/Kconfig | 10 -
drivers/misc/Makefile | 1 -
drivers/misc/bmp085.c | 483 ----------------------------
4 files changed, 0 insertions(+), 525 deletions(-)
delete mode 100644 Documentation/ABI/testing/sysfs-i2c-bmp085
delete mode 100644 drivers/misc/bmp085.c
diff --git a/Documentation/ABI/testing/sysfs-i2c-bmp085 b/Documentation/ABI/testing/sysfs-i2c-bmp085
deleted file mode 100644
index 585962a..0000000
--- a/Documentation/ABI/testing/sysfs-i2c-bmp085
+++ /dev/null
@@ -1,31 +0,0 @@
-What: /sys/bus/i2c/devices/<busnum>-<devaddr>/pressure0_input
-Date: June 2010
-Contact: Christoph Mair <christoph.mair@xxxxxxxxx>
-Description: Start a pressure measurement and read the result. Values
- represent the ambient air pressure in pascal (0.01 millibar).
-
- Reading: returns the current air pressure.
-
-
-What: /sys/bus/i2c/devices/<busnum>-<devaddr>/temp0_input
-Date: June 2010
-Contact: Christoph Mair <christoph.mair@xxxxxxxxx>
-Description: Measure the ambient temperature. The returned value represents
- the ambient temperature in units of 0.1 degree celsius.
-
- Reading: returns the current temperature.
-
-
-What: /sys/bus/i2c/devices/<busnum>-<devaddr>/oversampling
-Date: June 2010
-Contact: Christoph Mair <christoph.mair@xxxxxxxxx>
-Description: Tell the bmp085 to use more samples to calculate a pressure
- value. When writing to this file the chip will use 2^x samples
- to calculate the next pressure value with x being the value
- written. Using this feature will decrease RMS noise and
- increase the measurement time.
-
- Reading: returns the current oversampling setting.
-
- Writing: sets a new oversampling setting.
- Accepted values: 0..3.
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 2e894fd..601094f 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -451,16 +451,6 @@ config ARM_CHARLCD
line and the Linux version on the second line, but that's
still useful.
-config BMP085
- tristate "BMP085 digital pressure sensor"
- depends on I2C && SYSFS
- help
- If you say yes here you get support for the Bosch Sensortec
- BMP085 digital pressure sensor.
-
- To compile this driver as a module, choose M here: the
- module will be called bmp085.
-
config PCH_PHUB
tristate "Intel EG20T PCH/LAPIS Semicon IOH(ML7213/ML7223/ML7831) PHUB"
depends on PCI
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index a1aa04a..57473a1 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -10,7 +10,6 @@ obj-$(CONFIG_INTEL_MID_PTI) += pti.o
obj-$(CONFIG_ATMEL_PWM) += atmel_pwm.o
obj-$(CONFIG_ATMEL_SSC) += atmel-ssc.o
obj-$(CONFIG_ATMEL_TCLIB) += atmel_tclib.o
-obj-$(CONFIG_BMP085) += bmp085.o
obj-$(CONFIG_BMP18X) += bmp18x-core.o
obj-$(CONFIG_BMP18X_I2C) += bmp18x-i2c.o
obj-$(CONFIG_BMP18X_SPI) += bmp18x-spi.o
diff --git a/drivers/misc/bmp085.c b/drivers/misc/bmp085.c
deleted file mode 100644
index b29a2be..0000000
--- a/drivers/misc/bmp085.c
+++ /dev/null
@@ -1,483 +0,0 @@
-/* Copyright (c) 2010 Christoph Mair <christoph.mair@xxxxxxxxx>
-
- This driver supports the bmp085 digital barometric pressure
- and temperature sensor from Bosch Sensortec. The datasheet
- is available from their website:
- http://www.bosch-sensortec.com/content/language1/downloads/BST-BMP085-DS000-05.pdf
-
- A pressure measurement is issued by reading from pressure0_input.
- The return value ranges from 30000 to 110000 pascal with a resulution
- of 1 pascal (0.01 millibar) which enables measurements from 9000m above
- to 500m below sea level.
-
- The temperature can be read from temp0_input. Values range from
- -400 to 850 representing the ambient temperature in degree celsius
- multiplied by 10.The resolution is 0.1 celsius.
-
- Because ambient pressure is temperature dependent, a temperature
- measurement will be executed automatically even if the user is reading
- from pressure0_input. This happens if the last temperature measurement
- has been executed more then one second ago.
-
- To decrease RMS noise from pressure measurements, the bmp085 can
- autonomously calculate the average of up to eight samples. This is
- set up by writing to the oversampling sysfs file. Accepted values
- are 0, 1, 2 and 3. 2^x when x is the value written to this file
- specifies the number of samples used to calculate the ambient pressure.
- RMS noise is specified with six pascal (without averaging) and decreases
- down to 3 pascal when using an oversampling setting of 3.
-
- 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/module.h>
-#include <linux/init.h>
-#include <linux/i2c.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-
-
-#define BMP085_I2C_ADDRESS 0x77
-#define BMP085_CHIP_ID 0x55
-
-#define BMP085_CALIBRATION_DATA_START 0xAA
-#define BMP085_CALIBRATION_DATA_LENGTH 11 /* 16 bit values */
-#define BMP085_CHIP_ID_REG 0xD0
-#define BMP085_VERSION_REG 0xD1
-#define BMP085_CTRL_REG 0xF4
-#define BMP085_TEMP_MEASUREMENT 0x2E
-#define BMP085_PRESSURE_MEASUREMENT 0x34
-#define BMP085_CONVERSION_REGISTER_MSB 0xF6
-#define BMP085_CONVERSION_REGISTER_LSB 0xF7
-#define BMP085_CONVERSION_REGISTER_XLSB 0xF8
-#define BMP085_TEMP_CONVERSION_TIME 5
-
-#define BMP085_CLIENT_NAME "bmp085"
-
-
-static const unsigned short normal_i2c[] = { BMP085_I2C_ADDRESS,
- I2C_CLIENT_END };
-
-struct bmp085_calibration_data {
- s16 AC1, AC2, AC3;
- u16 AC4, AC5, AC6;
- s16 B1, B2;
- s16 MB, MC, MD;
-};
-
-
-/* Each client has this additional data */
-struct bmp085_data {
- struct i2c_client *client;
- struct mutex lock;
- struct bmp085_calibration_data calibration;
- u32 raw_temperature;
- u32 raw_pressure;
- unsigned char oversampling_setting;
- u32 last_temp_measurement;
- s32 b6; /* calculated temperature correction coefficient */
-};
-
-
-static s32 bmp085_read_calibration_data(struct i2c_client *client)
-{
- u16 tmp[BMP085_CALIBRATION_DATA_LENGTH];
- struct bmp085_data *data = i2c_get_clientdata(client);
- struct bmp085_calibration_data *cali = &(data->calibration);
- s32 status = i2c_smbus_read_i2c_block_data(client,
- BMP085_CALIBRATION_DATA_START,
- BMP085_CALIBRATION_DATA_LENGTH*sizeof(u16),
- (u8 *)tmp);
- if (status < 0)
- return status;
-
- if (status != BMP085_CALIBRATION_DATA_LENGTH*sizeof(u16))
- return -EIO;
-
- cali->AC1 = be16_to_cpu(tmp[0]);
- cali->AC2 = be16_to_cpu(tmp[1]);
- cali->AC3 = be16_to_cpu(tmp[2]);
- cali->AC4 = be16_to_cpu(tmp[3]);
- cali->AC5 = be16_to_cpu(tmp[4]);
- cali->AC6 = be16_to_cpu(tmp[5]);
- cali->B1 = be16_to_cpu(tmp[6]);
- cali->B2 = be16_to_cpu(tmp[7]);
- cali->MB = be16_to_cpu(tmp[8]);
- cali->MC = be16_to_cpu(tmp[9]);
- cali->MD = be16_to_cpu(tmp[10]);
- return 0;
-}
-
-
-static s32 bmp085_update_raw_temperature(struct bmp085_data *data)
-{
- u16 tmp;
- s32 status;
-
- mutex_lock(&data->lock);
- status = i2c_smbus_write_byte_data(data->client, BMP085_CTRL_REG,
- BMP085_TEMP_MEASUREMENT);
- if (status != 0) {
- dev_err(&data->client->dev,
- "Error while requesting temperature measurement.\n");
- goto exit;
- }
- msleep(BMP085_TEMP_CONVERSION_TIME);
-
- status = i2c_smbus_read_i2c_block_data(data->client,
- BMP085_CONVERSION_REGISTER_MSB, sizeof(tmp), (u8 *)&tmp);
- if (status < 0)
- goto exit;
- if (status != sizeof(tmp)) {
- dev_err(&data->client->dev,
- "Error while reading temperature measurement result\n");
- status = -EIO;
- goto exit;
- }
- data->raw_temperature = be16_to_cpu(tmp);
- data->last_temp_measurement = jiffies;
- status = 0; /* everything ok, return 0 */
-
-exit:
- mutex_unlock(&data->lock);
- return status;
-}
-
-static s32 bmp085_update_raw_pressure(struct bmp085_data *data)
-{
- u32 tmp = 0;
- s32 status;
-
- mutex_lock(&data->lock);
- status = i2c_smbus_write_byte_data(data->client, BMP085_CTRL_REG,
- BMP085_PRESSURE_MEASUREMENT + (data->oversampling_setting<<6));
- if (status != 0) {
- dev_err(&data->client->dev,
- "Error while requesting pressure measurement.\n");
- goto exit;
- }
-
- /* wait for the end of conversion */
- msleep(2+(3 << data->oversampling_setting));
-
- /* copy data into a u32 (4 bytes), but skip the first byte. */
- status = i2c_smbus_read_i2c_block_data(data->client,
- BMP085_CONVERSION_REGISTER_MSB, 3, ((u8 *)&tmp)+1);
- if (status < 0)
- goto exit;
- if (status != 3) {
- dev_err(&data->client->dev,
- "Error while reading pressure measurement results\n");
- status = -EIO;
- goto exit;
- }
- data->raw_pressure = be32_to_cpu((tmp));
- data->raw_pressure >>= (8-data->oversampling_setting);
- status = 0; /* everything ok, return 0 */
-
-exit:
- mutex_unlock(&data->lock);
- return status;
-}
-
-
-/*
- * This function starts the temperature measurement and returns the value
- * in tenth of a degree celsius.
- */
-static s32 bmp085_get_temperature(struct bmp085_data *data, int *temperature)
-{
- struct bmp085_calibration_data *cali = &data->calibration;
- long x1, x2;
- int status;
-
- status = bmp085_update_raw_temperature(data);
- if (status != 0)
- goto exit;
-
- x1 = ((data->raw_temperature - cali->AC6) * cali->AC5) >> 15;
- x2 = (cali->MC << 11) / (x1 + cali->MD);
- data->b6 = x1 + x2 - 4000;
- /* if NULL just update b6. Used for pressure only measurements */
- if (temperature != NULL)
- *temperature = (x1+x2+8) >> 4;
-
-exit:
- return status;
-}
-
-/*
- * This function starts the pressure measurement and returns the value
- * in millibar. Since the pressure depends on the ambient temperature,
- * a temperature measurement is executed if the last known value is older
- * than one second.
- */
-static s32 bmp085_get_pressure(struct bmp085_data *data, int *pressure)
-{
- struct bmp085_calibration_data *cali = &data->calibration;
- s32 x1, x2, x3, b3;
- u32 b4, b7;
- s32 p;
- int status;
-
- /* alt least every second force an update of the ambient temperature */
- if (data->last_temp_measurement + 1*HZ < jiffies) {
- status = bmp085_get_temperature(data, NULL);
- if (status != 0)
- goto exit;
- }
-
- status = bmp085_update_raw_pressure(data);
- if (status != 0)
- goto exit;
-
- x1 = (data->b6 * data->b6) >> 12;
- x1 *= cali->B2;
- x1 >>= 11;
-
- x2 = cali->AC2 * data->b6;
- x2 >>= 11;
-
- x3 = x1 + x2;
-
- b3 = (((((s32)cali->AC1) * 4 + x3) << data->oversampling_setting) + 2);
- b3 >>= 2;
-
- x1 = (cali->AC3 * data->b6) >> 13;
- x2 = (cali->B1 * ((data->b6 * data->b6) >> 12)) >> 16;
- x3 = (x1 + x2 + 2) >> 2;
- b4 = (cali->AC4 * (u32)(x3 + 32768)) >> 15;
-
- b7 = ((u32)data->raw_pressure - b3) *
- (50000 >> data->oversampling_setting);
- p = ((b7 < 0x80000000) ? ((b7 << 1) / b4) : ((b7 / b4) * 2));
-
- x1 = p >> 8;
- x1 *= x1;
- x1 = (x1 * 3038) >> 16;
- x2 = (-7357 * p) >> 16;
- p += (x1 + x2 + 3791) >> 4;
-
- *pressure = p;
-
-exit:
- return status;
-}
-
-/*
- * This function sets the chip-internal oversampling. Valid values are 0..3.
- * The chip will use 2^oversampling samples for internal averaging.
- * This influences the measurement time and the accuracy; larger values
- * increase both. The datasheet gives on overview on how measurement time,
- * accuracy and noise correlate.
- */
-static void bmp085_set_oversampling(struct bmp085_data *data,
- unsigned char oversampling)
-{
- if (oversampling > 3)
- oversampling = 3;
- data->oversampling_setting = oversampling;
-}
-
-/*
- * Returns the currently selected oversampling. Range: 0..3
- */
-static unsigned char bmp085_get_oversampling(struct bmp085_data *data)
-{
- return data->oversampling_setting;
-}
-
-/* sysfs callbacks */
-static ssize_t set_oversampling(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct bmp085_data *data = i2c_get_clientdata(client);
- unsigned long oversampling;
- int success = strict_strtoul(buf, 10, &oversampling);
- if (success == 0) {
- bmp085_set_oversampling(data, oversampling);
- return count;
- }
- return success;
-}
-
-static ssize_t show_oversampling(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct bmp085_data *data = i2c_get_clientdata(client);
- return sprintf(buf, "%u\n", bmp085_get_oversampling(data));
-}
-static DEVICE_ATTR(oversampling, S_IWUSR | S_IRUGO,
- show_oversampling, set_oversampling);
-
-
-static ssize_t show_temperature(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- int temperature;
- int status;
- struct i2c_client *client = to_i2c_client(dev);
- struct bmp085_data *data = i2c_get_clientdata(client);
-
- status = bmp085_get_temperature(data, &temperature);
- if (status != 0)
- return status;
- else
- return sprintf(buf, "%d\n", temperature);
-}
-static DEVICE_ATTR(temp0_input, S_IRUGO, show_temperature, NULL);
-
-
-static ssize_t show_pressure(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- int pressure;
- int status;
- struct i2c_client *client = to_i2c_client(dev);
- struct bmp085_data *data = i2c_get_clientdata(client);
-
- status = bmp085_get_pressure(data, &pressure);
- if (status != 0)
- return status;
- else
- return sprintf(buf, "%d\n", pressure);
-}
-static DEVICE_ATTR(pressure0_input, S_IRUGO, show_pressure, NULL);
-
-
-static struct attribute *bmp085_attributes[] = {
- &dev_attr_temp0_input.attr,
- &dev_attr_pressure0_input.attr,
- &dev_attr_oversampling.attr,
- NULL
-};
-
-static const struct attribute_group bmp085_attr_group = {
- .attrs = bmp085_attributes,
-};
-
-static int bmp085_detect(struct i2c_client *client, struct i2c_board_info *info)
-{
- if (client->addr != BMP085_I2C_ADDRESS)
- return -ENODEV;
-
- if (i2c_smbus_read_byte_data(client, BMP085_CHIP_ID_REG) != BMP085_CHIP_ID)
- return -ENODEV;
-
- return 0;
-}
-
-static int bmp085_init_client(struct i2c_client *client)
-{
- unsigned char version;
- int status;
- struct bmp085_data *data = i2c_get_clientdata(client);
- data->client = client;
- status = bmp085_read_calibration_data(client);
- if (status != 0)
- goto exit;
- version = i2c_smbus_read_byte_data(client, BMP085_VERSION_REG);
- data->last_temp_measurement = 0;
- data->oversampling_setting = 3;
- mutex_init(&data->lock);
- dev_info(&data->client->dev, "BMP085 ver. %d.%d found.\n",
- (version & 0x0F), (version & 0xF0) >> 4);
-exit:
- return status;
-}
-
-static int __devinit bmp085_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- struct bmp085_data *data;
- int err = 0;
-
- data = kzalloc(sizeof(struct bmp085_data), GFP_KERNEL);
- if (!data) {
- err = -ENOMEM;
- goto exit;
- }
-
- /* default settings after POR */
- data->oversampling_setting = 0x00;
-
- i2c_set_clientdata(client, data);
-
- /* Initialize the BMP085 chip */
- err = bmp085_init_client(client);
- if (err != 0)
- goto exit_free;
-
- /* Register sysfs hooks */
- err = sysfs_create_group(&client->dev.kobj, &bmp085_attr_group);
- if (err)
- goto exit_free;
-
- dev_info(&data->client->dev, "Successfully initialized bmp085!\n");
- goto exit;
-
-exit_free:
- kfree(data);
-exit:
- return err;
-}
-
-static int __devexit bmp085_remove(struct i2c_client *client)
-{
- sysfs_remove_group(&client->dev.kobj, &bmp085_attr_group);
- kfree(i2c_get_clientdata(client));
- return 0;
-}
-
-static const struct i2c_device_id bmp085_id[] = {
- { "bmp085", 0 },
- { }
-};
-MODULE_DEVICE_TABLE(i2c, bmp085_id);
-
-static struct i2c_driver bmp085_driver = {
- .driver = {
- .owner = THIS_MODULE,
- .name = "bmp085"
- },
- .id_table = bmp085_id,
- .probe = bmp085_probe,
- .remove = __devexit_p(bmp085_remove),
-
- .detect = bmp085_detect,
- .address_list = normal_i2c
-};
-
-static int __init bmp085_init(void)
-{
- return i2c_add_driver(&bmp085_driver);
-}
-
-static void __exit bmp085_exit(void)
-{
- i2c_del_driver(&bmp085_driver);
-}
-
-
-MODULE_AUTHOR("Christoph Mair <christoph.mair@xxxxxxxxx");
-MODULE_DESCRIPTION("BMP085 driver");
-MODULE_LICENSE("GPL");
-
-module_init(bmp085_init);
-module_exit(bmp085_exit);
--
1.7.3.4
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