From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <4CBDD2F3.4070800@gmail.com> Date: Tue, 19 Oct 2010 19:18:43 +0200 From: Matthias Brugger MIME-Version: 1.0 To: Jonathan Cameron CC: linux-iio@vger.kernel.org, shubhrajyoti@ti.com, matthias Subject: [PATCH] iio - bmp085 most issues done Content-Type: text/plain; charset=ISO-8859-15 List-ID: This patch handles with most of the issues mentioned. Hope I did it right, with patch submission like this. Signed-off-by: Matthias Brugger --- drivers/staging/iio/barometer/baro.h | 2 +- drivers/staging/iio/barometer/bmp085.c | 56 ++++++++++--------------------- drivers/staging/iio/barometer/bmp085.h | 37 ++++++++++++++++++++- 3 files changed, 55 insertions(+), 40 deletions(-) diff --git a/drivers/staging/iio/barometer/baro.h b/drivers/staging/iio/barometer/baro.h index e3b73a1..a25e4cd 100644 --- a/drivers/staging/iio/barometer/baro.h +++ b/drivers/staging/iio/barometer/baro.h @@ -4,5 +4,5 @@ /* Barometer types of attribute */ #define IIO_DEV_ATTR_BARO_PRESSURE(_mode, _show, _store, _addr) \ - IIO_DEVICE_ATTR(baro_pressure, _mode, _show, NULL, _addr) + IIO_DEVICE_ATTR(baro_pressure_input, _mode, _show, NULL, _addr) diff --git a/drivers/staging/iio/barometer/bmp085.c b/drivers/staging/iio/barometer/bmp085.c index 67dac39..580bd57 100644 --- a/drivers/staging/iio/barometer/bmp085.c +++ b/drivers/staging/iio/barometer/bmp085.c @@ -37,7 +37,7 @@ module_param(oss, int , S_IRUSR); MODULE_PARM_DESC(oss, "Oversampling setting [0-3]"); /***********************************************************************= *** - * Calcualtion of temperature and pressure + * Calculation of temperature and pressure *************************************************************************= */ static short bmp085_calc_temperature(struct i2c_client *client, unsigned long ut) @@ -90,17 +90,6 @@ static long bmp085_calc_pressure(struct i2c_client *client, unsigned long up) * Digital interface to sensor *************************************************************************= */ -static ssize_t bmp085_read(struct i2c_client *client, u8 reg, size_t count, - unsigned char *buffer) -{ - int rc; - rc =3D i2c_smbus_read_i2c_block_data(client, reg, count, buffer); - if (rc < 0) - return -EIO; - - return count; -} - static short bmp085_read_temp(struct i2c_client *client) { s32 ret; @@ -117,8 +106,9 @@ static short bmp085_read_temp(struct i2c_client *client) return ret; } - mdelay(5); - ret =3D bmp085_read(client, BMP085_REG_CONV, 2, data->data); + msleep(5); + ret =3D i2c_smbus_read_i2c_block_data(client, BMP085_REG_CONV, 2, + data->data); if (ret < 0) { dev_warn(&client->dev, "reading ut failed, value is %#x\n" , ret); @@ -139,7 +129,6 @@ static long bmp085_read_pressure(struct i2c_client *client) u8 xlsb, ret1, ret2; long pressure; u8 reg; - /* TODO should be 4.5, 7.5, 13.5, 25.5 ms */ int time_delay[4] =3D {5, 8, 14, 26}; struct bmp085_data *data =3D i2c_get_clientdata(client); @@ -163,7 +152,7 @@ static long bmp085_read_pressure(struct i2c_client *client) if (ret < 0) return ret; - mdelay(time_delay[data->oss]); + msleep(time_delay[data->oss]); mutex_lock(&data->bmp085_lock); ret1 =3D i2c_smbus_read_byte_data(client, 0xf6); @@ -176,7 +165,6 @@ static long bmp085_read_pressure(struct i2c_client *client) data->up =3D up; pressure =3D bmp085_calc_pressure(client, up); - data->pressure =3D pressure; return pressure; } @@ -199,13 +187,13 @@ static ssize_t barometer_show_temp(struct device *dev, data->temp =3D status; - return sprintf(buf, "%ld\n", data->temp); + return sprintf(buf, "%d\n", data->temp); } static IIO_DEV_ATTR_TEMP_RAW(barometer_show_temp); /** - * In standard mode, the temperature has to be reat every second before the - * pressure can be reat. We leave this semantics to the userspace, if later + * In standard mode, the temperature has to be read every second before the + * pressure can be read. We leave this semantics to the userspace, if later * on a trigger based reading will be implemented, this should be taken into * account. */ @@ -213,7 +201,7 @@ static ssize_t barometer_show_pressure(struct device *dev, struct device_attribute *da, char *buf) { struct iio_dev *indio_dev =3D dev_get_drvdata(dev); - struct bmp085_data *data =3D indio_dev->dev_data; + struct bmp085_data *data =3D iio_dev_get_devdata(indio_dev); struct i2c_client *client =3D data->client; long status; @@ -231,7 +219,7 @@ static ssize_t barometer_show_id_version(struct device *dev, struct device_attribute *da, char *buf) { struct iio_dev *indio_dev =3D dev_get_drvdata(dev); - struct bmp085_data *data =3D indio_dev->dev_data; + struct bmp085_data *data =3D iio_dev_get_devdata(indio_dev); return sprintf(buf, "%x_%x\n", data->chip_id, data->chip_version); } @@ -241,7 +229,7 @@ static ssize_t barometer_show_oss(struct device *dev, struct device_attribute *da, char *buf) { struct iio_dev *indio_dev =3D dev_get_drvdata(dev); - struct bmp085_data *data =3D indio_dev->dev_data; + struct bmp085_data *data =3D iio_dev_get_devdata(indio_dev); return sprintf(buf, "%d\n", data->oss); } @@ -251,7 +239,7 @@ static IIO_CONST_ATTR_TEMP_SCALE("0.1"); static struct attribute *bmp085_attributes[] =3D { &iio_dev_attr_temp_raw.dev_attr.attr, - &iio_dev_attr_baro_pressure.dev_attr.attr, + &iio_dev_attr_baro_pressure_input.dev_attr.attr, &iio_dev_attr_revision.dev_attr.attr, &iio_dev_attr_sampling_frequency.dev_attr.attr, &iio_const_attr_temp_scale.dev_attr.attr, @@ -271,15 +259,17 @@ static int bmp085_init_client(struct i2c_client *client) struct bmp085_data *data =3D i2c_get_clientdata(client); int i; - i =3D bmp085_read(client, BMP085_REG_CHIP_ID, 1, &data->chip_id); + i =3D i2c_smbus_read_i2c_block_data(client, BMP085_REG_CHIP_ID, 1, + &data->chip_id); if (i < 0) dev_warn(&client->dev, "Chip ID not read\n"); - i =3D bmp085_read(client, BMP085_REG_VERSION, 1, &data->chip_version); + i =3D i2c_smbus_read_i2c_block_data(client, BMP085_REG_VERSION, 1, + &data->chip_version); if (i < 0) dev_warn(&client->dev, "Version not read\n"); - i =3D bmp085_read(client, BMP085_REG_PROM, BMP085_PROM_LENGTH, + i =3D i2c_smbus_read_i2c_block_data(client, BMP085_REG_PROM, BMP085_PROM_LENGTH, data->data); if (i < 0) dev_warn(&client->dev, "Unable to read %d bytes from address " @@ -300,13 +290,11 @@ static int bmp085_init_client(struct i2c_client *client) return 0; } -static struct i2c_driver bmp085_drv; static int bmp085_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct i2c_adapter *adapter =3D to_i2c_adapter(client->dev.parent); struct bmp085_data *data; - struct bmp085_data *data2; int status =3D 0; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | @@ -326,12 +314,11 @@ static int bmp085_probe(struct i2c_client *client, data->client =3D client; i2c_set_clientdata(client, data); - data2 =3D i2c_get_clientdata(client); /* Initialize the BMP085 chip */ bmp085_init_client(client); - __mutex_init(&data->bmp085_lock, "bmp085_lock", NULL); + mutex_init(&data->bmp085_lock); /* Register with IIO */ data->indio_dev =3D iio_allocate_device(); @@ -350,8 +337,6 @@ static int bmp085_probe(struct i2c_client *client, if (status < 0) goto err_iio; - dev_info(&client->dev, "driver enabled\n"); - return 0; err_iio: @@ -365,16 +350,11 @@ static int __devexit bmp085_remove(struct i2c_client *client) { struct bmp085_data *data =3D i2c_get_clientdata(client); - if (mutex_is_locked(&data->bmp085_lock)) - mutex_unlock(&data->bmp085_lock); - iio_device_unregister(data->indio_dev); iio_free_device(data->indio_dev); kfree(data); - dev_info(&client->dev, "driver removed\n"); - return 0; } diff --git a/drivers/staging/iio/barometer/bmp085.h b/drivers/staging/iio/barometer/bmp085.h index 5ed2fb1..aec2ee4 100644 --- a/drivers/staging/iio/barometer/bmp085.h +++ b/drivers/staging/iio/barometer/bmp085.h @@ -35,6 +35,41 @@ #define BMP085_REG_VERSION 0xD1 #define BMP085_CHIP_ID 0x55 +/* + * data structure for every sensor + * + * @client i2c client + * @ indio_dev iio device representation + * + * @bmp085_lock mutex to synchronize parallel reads and writes + * + * @oss oversampling setting, determines how accurate the chip works + * @temp holding actual temperature in 0.1=B0C + * @pressure holding actual pressure in pascal + * + * @ac1 calibration value read at start-up + * @ac2 calibration value read at start-up + * @ac3 calibration value read at start-up + * @ac4 calibration value read at start-up + * @ac5 calibration value read at start-up + * @ac6 calibration value read at start-up + * + * @b1 calibration value read at start-up + * @b2 calibration value read at start-up + * @b3 calibration value read at start-up + * + * @mb calibration value read at start-up + * @mc calibration value read at start-up + * @md calibration value read at start-up + * + * @ut raw data to compute temperature + * @up raw data to compute pressure + * + * @chip_id id of the chip + * @chip_version version of the chip + * + * @data array to read initial calib data as a bulk + */ struct bmp085_data { struct i2c_client *client; struct iio_dev *indio_dev; @@ -42,7 +77,7 @@ struct bmp085_data { struct mutex bmp085_lock; int oss; - long temp; + s16 temp; long pressure; short ac1; --=20 1.5.6.5