diff options
Diffstat (limited to 'drivers/staging/iio/cdc/ad7746.c')
| -rw-r--r-- | drivers/staging/iio/cdc/ad7746.c | 50 |
1 files changed, 26 insertions, 24 deletions
diff --git a/drivers/staging/iio/cdc/ad7746.c b/drivers/staging/iio/cdc/ad7746.c index 81f8b9e..cdcb4fc 100644 --- a/drivers/staging/iio/cdc/ad7746.c +++ b/drivers/staging/iio/cdc/ad7746.c @@ -45,10 +45,10 @@ #define AD7746_STATUS_RDYCAP BIT(0) /* Capacitive Channel Setup Register Bit Designations (AD7746_REG_CAP_SETUP) */ -#define AD7746_CAPSETUP_CAPEN (1 << 7) -#define AD7746_CAPSETUP_CIN2 (1 << 6) /* AD7746 only */ -#define AD7746_CAPSETUP_CAPDIFF (1 << 5) -#define AD7746_CAPSETUP_CACHOP (1 << 0) +#define AD7746_CAPSETUP_CAPEN BIT(7) +#define AD7746_CAPSETUP_CIN2 BIT(6) /* AD7746 only */ +#define AD7746_CAPSETUP_CAPDIFF BIT(5) +#define AD7746_CAPSETUP_CACHOP BIT(0) /* Voltage/Temperature Setup Register Bit Designations (AD7746_REG_VT_SETUP) */ #define AD7746_VTSETUP_VTEN (1 << 7) @@ -56,9 +56,9 @@ #define AD7746_VTSETUP_VTMD_EXT_TEMP (1 << 5) #define AD7746_VTSETUP_VTMD_VDD_MON (2 << 5) #define AD7746_VTSETUP_VTMD_EXT_VIN (3 << 5) -#define AD7746_VTSETUP_EXTREF (1 << 4) -#define AD7746_VTSETUP_VTSHORT (1 << 1) -#define AD7746_VTSETUP_VTCHOP (1 << 0) +#define AD7746_VTSETUP_EXTREF BIT(4) +#define AD7746_VTSETUP_VTSHORT BIT(1) +#define AD7746_VTSETUP_VTCHOP BIT(0) /* Excitation Setup Register Bit Designations (AD7746_REG_EXC_SETUP) */ #define AD7746_EXCSETUP_CLKCTRL BIT(7) @@ -82,7 +82,7 @@ #define AD7746_CONF_MODE_GAIN_CAL (6 << 0) /* CAPDAC Register Bit Designations (AD7746_REG_CAPDACx) */ -#define AD7746_CAPDAC_DACEN (1 << 7) +#define AD7746_CAPDAC_DACEN BIT(7) #define AD7746_CAPDAC_DACP(x) ((x) & 0x7F) /* @@ -91,6 +91,7 @@ struct ad7746_chip_info { struct i2c_client *client; + struct mutex lock; /* protect sensor state */ /* * Capacitive channel digital filter setup; * conversion time/update rate setup per channel @@ -298,11 +299,11 @@ static inline ssize_t ad7746_start_calib(struct device *dev, if (!doit) return 0; - mutex_lock(&indio_dev->mlock); + mutex_lock(&chip->lock); regval |= chip->config; ret = i2c_smbus_write_byte_data(chip->client, AD7746_REG_CFG, regval); if (ret < 0) { - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&chip->lock); return ret; } @@ -310,12 +311,12 @@ static inline ssize_t ad7746_start_calib(struct device *dev, msleep(20); ret = i2c_smbus_read_byte_data(chip->client, AD7746_REG_CFG); if (ret < 0) { - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&chip->lock); return ret; } } while ((ret == regval) && timeout--); - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&chip->lock); return len; } @@ -351,15 +352,15 @@ static ssize_t ad7746_start_gain_calib(struct device *dev, } static IIO_DEVICE_ATTR(in_capacitance0_calibbias_calibration, - S_IWUSR, NULL, ad7746_start_offset_calib, CIN1); + 0200, NULL, ad7746_start_offset_calib, CIN1); static IIO_DEVICE_ATTR(in_capacitance1_calibbias_calibration, - S_IWUSR, NULL, ad7746_start_offset_calib, CIN2); + 0200, NULL, ad7746_start_offset_calib, CIN2); static IIO_DEVICE_ATTR(in_capacitance0_calibscale_calibration, - S_IWUSR, NULL, ad7746_start_gain_calib, CIN1); + 0200, NULL, ad7746_start_gain_calib, CIN1); static IIO_DEVICE_ATTR(in_capacitance1_calibscale_calibration, - S_IWUSR, NULL, ad7746_start_gain_calib, CIN2); + 0200, NULL, ad7746_start_gain_calib, CIN2); static IIO_DEVICE_ATTR(in_voltage0_calibscale_calibration, - S_IWUSR, NULL, ad7746_start_gain_calib, VIN); + 0200, NULL, ad7746_start_gain_calib, VIN); static int ad7746_store_cap_filter_rate_setup(struct ad7746_chip_info *chip, int val) @@ -426,7 +427,7 @@ static int ad7746_write_raw(struct iio_dev *indio_dev, struct ad7746_chip_info *chip = iio_priv(indio_dev); int ret, reg; - mutex_lock(&indio_dev->mlock); + mutex_lock(&chip->lock); switch (mask) { case IIO_CHAN_INFO_CALIBSCALE: @@ -521,7 +522,7 @@ static int ad7746_write_raw(struct iio_dev *indio_dev, } out: - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&chip->lock); return ret; } @@ -534,7 +535,7 @@ static int ad7746_read_raw(struct iio_dev *indio_dev, int ret, delay, idx; u8 regval, reg; - mutex_lock(&indio_dev->mlock); + mutex_lock(&chip->lock); switch (mask) { case IIO_CHAN_INFO_RAW: @@ -546,7 +547,7 @@ static int ad7746_read_raw(struct iio_dev *indio_dev, regval = chip->config | AD7746_CONF_MODE_SINGLE_CONV; ret = i2c_smbus_write_byte_data(chip->client, AD7746_REG_CFG, - regval); + regval); if (ret < 0) goto out; @@ -658,14 +659,14 @@ static int ad7746_read_raw(struct iio_dev *indio_dev, ret = -EINVAL; } out: - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&chip->lock); return ret; } static const struct iio_info ad7746_info = { .attrs = &ad7746_attribute_group, - .read_raw = &ad7746_read_raw, - .write_raw = &ad7746_write_raw, + .read_raw = ad7746_read_raw, + .write_raw = ad7746_write_raw, .driver_module = THIS_MODULE, }; @@ -686,6 +687,7 @@ static int ad7746_probe(struct i2c_client *client, if (!indio_dev) return -ENOMEM; chip = iio_priv(indio_dev); + mutex_init(&chip->lock); /* this is only used for device removal purposes */ i2c_set_clientdata(client, indio_dev); |
