diff options
Diffstat (limited to 'drivers/iio/adc/ti-ads8344.c')
| -rw-r--r-- | drivers/iio/adc/ti-ads8344.c | 47 |
1 files changed, 18 insertions, 29 deletions
diff --git a/drivers/iio/adc/ti-ads8344.c b/drivers/iio/adc/ti-ads8344.c index 9a460807d46d..bbd85cb47f81 100644 --- a/drivers/iio/adc/ti-ads8344.c +++ b/drivers/iio/adc/ti-ads8344.c @@ -4,7 +4,7 @@ * * Author: Gregory CLEMENT <gregory.clement@bootlin.com> * - * Datasheet: http://www.ti.com/lit/ds/symlink/ads8344.pdf + * Datasheet: https://www.ti.com/lit/ds/symlink/ads8344.pdf */ #include <linux/delay.h> @@ -28,20 +28,21 @@ struct ads8344 { */ struct mutex lock; - u8 tx_buf ____cacheline_aligned; - u16 rx_buf; + u8 tx_buf __aligned(IIO_DMA_MINALIGN); + u8 rx_buf[3]; }; -#define ADS8344_VOLTAGE_CHANNEL(chan, si) \ +#define ADS8344_VOLTAGE_CHANNEL(chan, addr) \ { \ .type = IIO_VOLTAGE, \ .indexed = 1, \ .channel = chan, \ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ + .address = addr, \ } -#define ADS8344_VOLTAGE_CHANNEL_DIFF(chan1, chan2, si) \ +#define ADS8344_VOLTAGE_CHANNEL_DIFF(chan1, chan2, addr) \ { \ .type = IIO_VOLTAGE, \ .indexed = 1, \ @@ -50,6 +51,7 @@ struct ads8344 { .differential = 1, \ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ + .address = addr, \ } static const struct iio_chan_spec ads8344_channels[] = { @@ -89,11 +91,11 @@ static int ads8344_adc_conversion(struct ads8344 *adc, int channel, udelay(9); - ret = spi_read(spi, &adc->rx_buf, 2); + ret = spi_read(spi, adc->rx_buf, sizeof(adc->rx_buf)); if (ret) return ret; - return adc->rx_buf; + return adc->rx_buf[0] << 9 | adc->rx_buf[1] << 1 | adc->rx_buf[2] >> 7; } static int ads8344_read_raw(struct iio_dev *iio, @@ -105,7 +107,7 @@ static int ads8344_read_raw(struct iio_dev *iio, switch (mask) { case IIO_CHAN_INFO_RAW: mutex_lock(&adc->lock); - *value = ads8344_adc_conversion(adc, channel->scan_index, + *value = ads8344_adc_conversion(adc, channel->address, channel->differential); mutex_unlock(&adc->lock); if (*value < 0) @@ -131,6 +133,11 @@ static const struct iio_info ads8344_info = { .read_raw = ads8344_read_raw, }; +static void ads8344_reg_disable(void *data) +{ + regulator_disable(data); +} + static int ads8344_probe(struct spi_device *spi) { struct iio_dev *indio_dev; @@ -146,8 +153,6 @@ static int ads8344_probe(struct spi_device *spi) mutex_init(&adc->lock); indio_dev->name = dev_name(&spi->dev); - indio_dev->dev.parent = &spi->dev; - indio_dev->dev.of_node = spi->dev.of_node; indio_dev->info = &ads8344_info; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->channels = ads8344_channels; @@ -161,26 +166,11 @@ static int ads8344_probe(struct spi_device *spi) if (ret) return ret; - spi_set_drvdata(spi, indio_dev); - - ret = iio_device_register(indio_dev); - if (ret) { - regulator_disable(adc->reg); + ret = devm_add_action_or_reset(&spi->dev, ads8344_reg_disable, adc->reg); + if (ret) return ret; - } - - return 0; -} - -static int ads8344_remove(struct spi_device *spi) -{ - struct iio_dev *indio_dev = spi_get_drvdata(spi); - struct ads8344 *adc = iio_priv(indio_dev); - - iio_device_unregister(indio_dev); - regulator_disable(adc->reg); - return 0; + return devm_iio_device_register(&spi->dev, indio_dev); } static const struct of_device_id ads8344_of_match[] = { @@ -195,7 +185,6 @@ static struct spi_driver ads8344_driver = { .of_match_table = ads8344_of_match, }, .probe = ads8344_probe, - .remove = ads8344_remove, }; module_spi_driver(ads8344_driver); |