misc: retire the old BMP085 driver
Patches merged to the IIO BMP085 driver makes it fully compliant with all features found in this old misc driver. Retire this old driver in favor of the new one in the proper subsystem. Cc: Jonathan Cameron <jic23@cam.ac.uk> Cc: Marek Belisko <marek@goldelico.com> Acked-by: H. Nikolaus Schaller <hns@goldelico.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Linus Walleij
Greg Kroah-Hartman
Родитель
9b9e7d36bd
Коммит
832c8232dd
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@ -1,31 +0,0 @@
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|||
What: /sys/bus/i2c/devices/<busnum>-<devaddr>/pressure0_input
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Date: June 2010
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||||
Contact: Christoph Mair <christoph.mair@gmail.com>
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Description: Start a pressure measurement and read the result. Values
|
||||
represent the ambient air pressure in pascal (0.01 millibar).
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Reading: returns the current air pressure.
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What: /sys/bus/i2c/devices/<busnum>-<devaddr>/temp0_input
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Date: June 2010
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Contact: Christoph Mair <christoph.mair@gmail.com>
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Description: Measure the ambient temperature. The returned value represents
|
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the ambient temperature in units of 0.1 degree celsius.
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||||
Reading: returns the current temperature.
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|
||||
What: /sys/bus/i2c/devices/<busnum>-<devaddr>/oversampling
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||||
Date: June 2010
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Contact: Christoph Mair <christoph.mair@gmail.com>
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Description: Tell the bmp085 to use more samples to calculate a pressure
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value. When writing to this file the chip will use 2^x samples
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||||
to calculate the next pressure value with x being the value
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||||
written. Using this feature will decrease RMS noise and
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||||
increase the measurement time.
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Reading: returns the current oversampling setting.
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||||
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Writing: sets a new oversampling setting.
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Accepted values: 0..3.
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@ -8,8 +8,6 @@ menu "Pressure sensors"
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config BMP280
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tristate "Bosch Sensortec BMP180/BMP280 pressure sensor I2C driver"
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||||
depends on (I2C || SPI_MASTER)
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depends on !(BMP085_I2C=y || BMP085_I2C=m)
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||||
depends on !(BMP085_SPI=y || BMP085_SPI=m)
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select REGMAP
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select BMP280_I2C if (I2C)
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select BMP280_SPI if (SPI_MASTER)
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|
|
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@ -439,34 +439,6 @@ config ARM_CHARLCD
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line and the Linux version on the second line, but that's
|
||||
still useful.
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||||
config BMP085
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tristate
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depends on SYSFS
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config BMP085_I2C
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tristate "BMP085 digital pressure sensor on I2C"
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select BMP085
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select REGMAP_I2C
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depends on I2C && SYSFS
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help
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Say Y here if you want to support Bosch Sensortec's digital pressure
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sensor hooked to an I2C bus.
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||||
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||||
To compile this driver as a module, choose M here: the
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module will be called bmp085-i2c.
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|
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config BMP085_SPI
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tristate "BMP085 digital pressure sensor on SPI"
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select BMP085
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select REGMAP_SPI
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depends on SPI_MASTER && SYSFS
|
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help
|
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Say Y here if you want to support Bosch Sensortec's digital pressure
|
||||
sensor hooked to an SPI bus.
|
||||
|
||||
To compile this driver as a module, choose M here: the
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module will be called bmp085-spi.
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config PCH_PHUB
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tristate "Intel EG20T PCH/LAPIS Semicon IOH(ML7213/ML7223/ML7831) PHUB"
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select GENERIC_NET_UTILS
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|
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|||
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@ -9,9 +9,6 @@ obj-$(CONFIG_AD525X_DPOT_SPI) += ad525x_dpot-spi.o
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obj-$(CONFIG_INTEL_MID_PTI) += pti.o
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obj-$(CONFIG_ATMEL_SSC) += atmel-ssc.o
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obj-$(CONFIG_ATMEL_TCLIB) += atmel_tclib.o
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obj-$(CONFIG_BMP085) += bmp085.o
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obj-$(CONFIG_BMP085_I2C) += bmp085-i2c.o
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||||
obj-$(CONFIG_BMP085_SPI) += bmp085-spi.o
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||||
obj-$(CONFIG_DUMMY_IRQ) += dummy-irq.o
|
||||
obj-$(CONFIG_ICS932S401) += ics932s401.o
|
||||
obj-$(CONFIG_LKDTM) += lkdtm.o
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|
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@ -1,83 +0,0 @@
|
|||
/*
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||||
* Copyright (c) 2012 Bosch Sensortec GmbH
|
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* Copyright (c) 2012 Unixphere AB
|
||||
*
|
||||
* 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>
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||||
#include <linux/i2c.h>
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||||
#include <linux/err.h>
|
||||
#include "bmp085.h"
|
||||
|
||||
#define BMP085_I2C_ADDRESS 0x77
|
||||
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||||
static const unsigned short normal_i2c[] = { BMP085_I2C_ADDRESS,
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||||
I2C_CLIENT_END };
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|
||||
static int bmp085_i2c_detect(struct i2c_client *client,
|
||||
struct i2c_board_info *info)
|
||||
{
|
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if (client->addr != BMP085_I2C_ADDRESS)
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||||
return -ENODEV;
|
||||
|
||||
return bmp085_detect(&client->dev);
|
||||
}
|
||||
|
||||
static int bmp085_i2c_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
int err;
|
||||
struct regmap *regmap = devm_regmap_init_i2c(client,
|
||||
&bmp085_regmap_config);
|
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|
||||
if (IS_ERR(regmap)) {
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err = PTR_ERR(regmap);
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dev_err(&client->dev, "Failed to init regmap: %d\n", err);
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return err;
|
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}
|
||||
|
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return bmp085_probe(&client->dev, regmap, client->irq);
|
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}
|
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|
||||
static int bmp085_i2c_remove(struct i2c_client *client)
|
||||
{
|
||||
return bmp085_remove(&client->dev);
|
||||
}
|
||||
|
||||
static const struct i2c_device_id bmp085_id[] = {
|
||||
{ BMP085_NAME, 0 },
|
||||
{ "bmp180", 0 },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, bmp085_id);
|
||||
|
||||
static struct i2c_driver bmp085_i2c_driver = {
|
||||
.driver = {
|
||||
.name = BMP085_NAME,
|
||||
},
|
||||
.id_table = bmp085_id,
|
||||
.probe = bmp085_i2c_probe,
|
||||
.remove = bmp085_i2c_remove,
|
||||
|
||||
.detect = bmp085_i2c_detect,
|
||||
.address_list = normal_i2c
|
||||
};
|
||||
|
||||
module_i2c_driver(bmp085_i2c_driver);
|
||||
|
||||
MODULE_AUTHOR("Eric Andersson <eric.andersson@unixphere.com>");
|
||||
MODULE_DESCRIPTION("BMP085 I2C bus driver");
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||||
MODULE_LICENSE("GPL");
|
||||
|
|
@ -1,79 +0,0 @@
|
|||
/*
|
||||
* Copyright (c) 2012 Bosch Sensortec GmbH
|
||||
* Copyright (c) 2012 Unixphere AB
|
||||
*
|
||||
* 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/spi/spi.h>
|
||||
#include <linux/err.h>
|
||||
#include "bmp085.h"
|
||||
|
||||
static int bmp085_spi_probe(struct spi_device *client)
|
||||
{
|
||||
int err;
|
||||
struct regmap *regmap;
|
||||
|
||||
client->bits_per_word = 8;
|
||||
err = spi_setup(client);
|
||||
if (err < 0) {
|
||||
dev_err(&client->dev, "spi_setup failed!\n");
|
||||
return err;
|
||||
}
|
||||
|
||||
regmap = devm_regmap_init_spi(client, &bmp085_regmap_config);
|
||||
if (IS_ERR(regmap)) {
|
||||
err = PTR_ERR(regmap);
|
||||
dev_err(&client->dev, "Failed to init regmap: %d\n", err);
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||||
return err;
|
||||
}
|
||||
|
||||
return bmp085_probe(&client->dev, regmap, client->irq);
|
||||
}
|
||||
|
||||
static int bmp085_spi_remove(struct spi_device *client)
|
||||
{
|
||||
return bmp085_remove(&client->dev);
|
||||
}
|
||||
|
||||
static const struct of_device_id bmp085_of_match[] = {
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||||
{ .compatible = "bosch,bmp085", },
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, bmp085_of_match);
|
||||
|
||||
static const struct spi_device_id bmp085_id[] = {
|
||||
{ "bmp180", 0 },
|
||||
{ "bmp181", 0 },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(spi, bmp085_id);
|
||||
|
||||
static struct spi_driver bmp085_spi_driver = {
|
||||
.driver = {
|
||||
.name = BMP085_NAME,
|
||||
.of_match_table = bmp085_of_match
|
||||
},
|
||||
.id_table = bmp085_id,
|
||||
.probe = bmp085_spi_probe,
|
||||
.remove = bmp085_spi_remove
|
||||
};
|
||||
|
||||
module_spi_driver(bmp085_spi_driver);
|
||||
|
||||
MODULE_AUTHOR("Eric Andersson <eric.andersson@unixphere.com>");
|
||||
MODULE_DESCRIPTION("BMP085 SPI bus driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
@ -1,506 +0,0 @@
|
|||
/* Copyright (c) 2010 Christoph Mair <christoph.mair@gmail.com>
|
||||
* Copyright (c) 2012 Bosch Sensortec GmbH
|
||||
* Copyright (c) 2012 Unixphere AB
|
||||
*
|
||||
* This driver supports the bmp085 and bmp18x digital barometric pressure
|
||||
* and temperature sensors from Bosch Sensortec. The datasheets
|
||||
* are available from their website:
|
||||
* http://www.bosch-sensortec.com/content/language1/downloads/BST-BMP085-DS000-05.pdf
|
||||
* http://www.bosch-sensortec.com/content/language1/downloads/BST-BMP180-DS000-07.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/device.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/of.h>
|
||||
#include "bmp085.h"
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/completion.h>
|
||||
#include <linux/gpio.h>
|
||||
|
||||
#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_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
|
||||
|
||||
struct bmp085_calibration_data {
|
||||
s16 AC1, AC2, AC3;
|
||||
u16 AC4, AC5, AC6;
|
||||
s16 B1, B2;
|
||||
s16 MB, MC, MD;
|
||||
};
|
||||
|
||||
struct bmp085_data {
|
||||
struct device *dev;
|
||||
struct regmap *regmap;
|
||||
struct mutex lock;
|
||||
struct bmp085_calibration_data calibration;
|
||||
u8 oversampling_setting;
|
||||
u32 raw_temperature;
|
||||
u32 raw_pressure;
|
||||
u32 temp_measurement_period;
|
||||
unsigned long last_temp_measurement;
|
||||
u8 chip_id;
|
||||
s32 b6; /* calculated temperature correction coefficient */
|
||||
int irq;
|
||||
struct completion done;
|
||||
};
|
||||
|
||||
static irqreturn_t bmp085_eoc_isr(int irq, void *devid)
|
||||
{
|
||||
struct bmp085_data *data = devid;
|
||||
|
||||
complete(&data->done);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static s32 bmp085_read_calibration_data(struct bmp085_data *data)
|
||||
{
|
||||
u16 tmp[BMP085_CALIBRATION_DATA_LENGTH];
|
||||
struct bmp085_calibration_data *cali = &(data->calibration);
|
||||
s32 status = regmap_bulk_read(data->regmap,
|
||||
BMP085_CALIBRATION_DATA_START, (u8 *)tmp,
|
||||
(BMP085_CALIBRATION_DATA_LENGTH << 1));
|
||||
if (status < 0)
|
||||
return status;
|
||||
|
||||
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);
|
||||
|
||||
init_completion(&data->done);
|
||||
|
||||
status = regmap_write(data->regmap, BMP085_CTRL_REG,
|
||||
BMP085_TEMP_MEASUREMENT);
|
||||
if (status < 0) {
|
||||
dev_err(data->dev,
|
||||
"Error while requesting temperature measurement.\n");
|
||||
goto exit;
|
||||
}
|
||||
wait_for_completion_timeout(&data->done, 1 + msecs_to_jiffies(
|
||||
BMP085_TEMP_CONVERSION_TIME));
|
||||
|
||||
status = regmap_bulk_read(data->regmap, BMP085_CONVERSION_REGISTER_MSB,
|
||||
&tmp, sizeof(tmp));
|
||||
if (status < 0) {
|
||||
dev_err(data->dev,
|
||||
"Error while reading temperature measurement result\n");
|
||||
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);
|
||||
|
||||
init_completion(&data->done);
|
||||
|
||||
status = regmap_write(data->regmap, BMP085_CTRL_REG,
|
||||
BMP085_PRESSURE_MEASUREMENT +
|
||||
(data->oversampling_setting << 6));
|
||||
if (status < 0) {
|
||||
dev_err(data->dev,
|
||||
"Error while requesting pressure measurement.\n");
|
||||
goto exit;
|
||||
}
|
||||
|
||||
/* wait for the end of conversion */
|
||||
wait_for_completion_timeout(&data->done, 1 + msecs_to_jiffies(
|
||||
2+(3 << data->oversampling_setting)));
|
||||
/* copy data into a u32 (4 bytes), but skip the first byte. */
|
||||
status = regmap_bulk_read(data->regmap, BMP085_CONVERSION_REGISTER_MSB,
|
||||
((u8 *)&tmp)+1, 3);
|
||||
if (status < 0) {
|
||||
dev_err(data->dev,
|
||||
"Error while reading pressure measurement results\n");
|
||||
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 according to the given temperature
|
||||
* measurement period (default is 1 sec boundary). This period could vary
|
||||
* and needs to be adjusted according to the sensor environment, i.e. if big
|
||||
* temperature variations then the temperature needs to be read out often.
|
||||
*/
|
||||
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 == 0) ||
|
||||
time_is_before_jiffies(data->last_temp_measurement + 1*HZ)) {
|
||||
status = bmp085_get_temperature(data, NULL);
|
||||
if (status < 0)
|
||||
return status;
|
||||
}
|
||||
|
||||
status = bmp085_update_raw_pressure(data);
|
||||
if (status < 0)
|
||||
return status;
|
||||
|
||||
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;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* 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 an 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 bmp085_data *data = dev_get_drvdata(dev);
|
||||
unsigned long oversampling;
|
||||
int err = kstrtoul(buf, 10, &oversampling);
|
||||
|
||||
if (err == 0) {
|
||||
mutex_lock(&data->lock);
|
||||
bmp085_set_oversampling(data, oversampling);
|
||||
mutex_unlock(&data->lock);
|
||||
return count;
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static ssize_t show_oversampling(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct bmp085_data *data = dev_get_drvdata(dev);
|
||||
|
||||
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 bmp085_data *data = dev_get_drvdata(dev);
|
||||
|
||||
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 bmp085_data *data = dev_get_drvdata(dev);
|
||||
|
||||
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,
|
||||
};
|
||||
|
||||
int bmp085_detect(struct device *dev)
|
||||
{
|
||||
struct bmp085_data *data = dev_get_drvdata(dev);
|
||||
unsigned int id;
|
||||
int ret;
|
||||
|
||||
ret = regmap_read(data->regmap, BMP085_CHIP_ID_REG, &id);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
if (id != data->chip_id)
|
||||
return -ENODEV;
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(bmp085_detect);
|
||||
|
||||
static void bmp085_get_of_properties(struct bmp085_data *data)
|
||||
{
|
||||
#ifdef CONFIG_OF
|
||||
struct device_node *np = data->dev->of_node;
|
||||
u32 prop;
|
||||
|
||||
if (!np)
|
||||
return;
|
||||
|
||||
if (!of_property_read_u32(np, "chip-id", &prop))
|
||||
data->chip_id = prop & 0xff;
|
||||
|
||||
if (!of_property_read_u32(np, "temp-measurement-period", &prop))
|
||||
data->temp_measurement_period = (prop/100)*HZ;
|
||||
|
||||
if (!of_property_read_u32(np, "default-oversampling", &prop))
|
||||
data->oversampling_setting = prop & 0xff;
|
||||
#endif
|
||||
}
|
||||
|
||||
static int bmp085_init_client(struct bmp085_data *data)
|
||||
{
|
||||
int status = bmp085_read_calibration_data(data);
|
||||
|
||||
if (status < 0)
|
||||
return status;
|
||||
|
||||
/* default settings */
|
||||
data->chip_id = BMP085_CHIP_ID;
|
||||
data->last_temp_measurement = 0;
|
||||
data->temp_measurement_period = 1*HZ;
|
||||
data->oversampling_setting = 3;
|
||||
|
||||
bmp085_get_of_properties(data);
|
||||
|
||||
mutex_init(&data->lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct regmap_config bmp085_regmap_config = {
|
||||
.reg_bits = 8,
|
||||
.val_bits = 8
|
||||
};
|
||||
EXPORT_SYMBOL_GPL(bmp085_regmap_config);
|
||||
|
||||
int bmp085_probe(struct device *dev, struct regmap *regmap, int irq)
|
||||
{
|
||||
struct bmp085_data *data;
|
||||
int err = 0;
|
||||
|
||||
data = kzalloc(sizeof(struct bmp085_data), GFP_KERNEL);
|
||||
if (!data) {
|
||||
err = -ENOMEM;
|
||||
goto exit;
|
||||
}
|
||||
|
||||
dev_set_drvdata(dev, data);
|
||||
data->dev = dev;
|
||||
data->regmap = regmap;
|
||||
data->irq = irq;
|
||||
|
||||
if (data->irq > 0) {
|
||||
err = devm_request_irq(dev, data->irq, bmp085_eoc_isr,
|
||||
IRQF_TRIGGER_RISING, "bmp085",
|
||||
data);
|
||||
if (err < 0)
|
||||
goto exit_free;
|
||||
}
|
||||
|
||||
/* Initialize the BMP085 chip */
|
||||
err = bmp085_init_client(data);
|
||||
if (err < 0)
|
||||
goto exit_free;
|
||||
|
||||
err = bmp085_detect(dev);
|
||||
if (err < 0) {
|
||||
dev_err(dev, "%s: chip_id failed!\n", BMP085_NAME);
|
||||
goto exit_free;
|
||||
}
|
||||
|
||||
/* Register sysfs hooks */
|
||||
err = sysfs_create_group(&dev->kobj, &bmp085_attr_group);
|
||||
if (err)
|
||||
goto exit_free;
|
||||
|
||||
dev_info(dev, "Successfully initialized %s!\n", BMP085_NAME);
|
||||
|
||||
return 0;
|
||||
|
||||
exit_free:
|
||||
kfree(data);
|
||||
exit:
|
||||
return err;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(bmp085_probe);
|
||||
|
||||
int bmp085_remove(struct device *dev)
|
||||
{
|
||||
struct bmp085_data *data = dev_get_drvdata(dev);
|
||||
|
||||
sysfs_remove_group(&data->dev->kobj, &bmp085_attr_group);
|
||||
kfree(data);
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(bmp085_remove);
|
||||
|
||||
MODULE_AUTHOR("Christoph Mair <christoph.mair@gmail.com>");
|
||||
MODULE_DESCRIPTION("BMP085 driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
@ -1,33 +0,0 @@
|
|||
/*
|
||||
* Copyright (c) 2012 Bosch Sensortec GmbH
|
||||
* Copyright (c) 2012 Unixphere AB
|
||||
*
|
||||
* 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 _BMP085_H
|
||||
#define _BMP085_H
|
||||
|
||||
#include <linux/regmap.h>
|
||||
|
||||
#define BMP085_NAME "bmp085"
|
||||
|
||||
extern struct regmap_config bmp085_regmap_config;
|
||||
|
||||
int bmp085_probe(struct device *dev, struct regmap *regmap, int irq);
|
||||
int bmp085_remove(struct device *dev);
|
||||
int bmp085_detect(struct device *dev);
|
||||
|
||||
#endif
|
||||
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