diff options
Diffstat (limited to 'drivers/iio/light/as73211.c')
| -rw-r--r-- | drivers/iio/light/as73211.c | 68 |
1 files changed, 40 insertions, 28 deletions
diff --git a/drivers/iio/light/as73211.c b/drivers/iio/light/as73211.c index be0068081ebb..68f60dc3c79d 100644 --- a/drivers/iio/light/as73211.c +++ b/drivers/iio/light/as73211.c @@ -16,6 +16,7 @@ */ #include <linux/bitfield.h> +#include <linux/cleanup.h> #include <linux/completion.h> #include <linux/delay.h> #include <linux/i2c.h> @@ -177,6 +178,12 @@ struct as73211_data { BIT(AS73211_SCAN_INDEX_TEMP) | \ AS73211_SCAN_MASK_COLOR) +static const unsigned long as73211_scan_masks[] = { + AS73211_SCAN_MASK_COLOR, + AS73211_SCAN_MASK_ALL, + 0 +}; + static const struct iio_chan_spec as73211_channels[] = { { .type = IIO_TEMP, @@ -412,18 +419,17 @@ static int as73211_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec cons case IIO_CHAN_INFO_RAW: { int ret; - ret = iio_device_claim_direct_mode(indio_dev); - if (ret < 0) - return ret; + if (!iio_device_claim_direct(indio_dev)) + return -EBUSY; ret = as73211_req_data(data); if (ret < 0) { - iio_device_release_direct_mode(indio_dev); + iio_device_release_direct(indio_dev); return ret; } ret = i2c_smbus_read_word_data(data->client, chan->address); - iio_device_release_direct_mode(indio_dev); + iio_device_release_direct(indio_dev); if (ret < 0) return ret; @@ -511,6 +517,16 @@ static int _as73211_write_raw(struct iio_dev *indio_dev, struct as73211_data *data = iio_priv(indio_dev); int ret; + /* Need to switch to config mode ... */ + if ((data->osr & AS73211_OSR_DOS_MASK) != AS73211_OSR_DOS_CONFIG) { + data->osr &= ~AS73211_OSR_DOS_MASK; + data->osr |= AS73211_OSR_DOS_CONFIG; + + ret = i2c_smbus_write_byte_data(data->client, AS73211_REG_OSR, data->osr); + if (ret < 0) + return ret; + } + switch (mask) { case IIO_CHAN_INFO_SAMP_FREQ: { int reg_bits, freq_kHz = val / HZ_PER_KHZ; /* 1024, 2048, ... */ @@ -595,28 +611,14 @@ static int as73211_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec con struct as73211_data *data = iio_priv(indio_dev); int ret; - mutex_lock(&data->mutex); - - ret = iio_device_claim_direct_mode(indio_dev); - if (ret < 0) - goto error_unlock; - - /* Need to switch to config mode ... */ - if ((data->osr & AS73211_OSR_DOS_MASK) != AS73211_OSR_DOS_CONFIG) { - data->osr &= ~AS73211_OSR_DOS_MASK; - data->osr |= AS73211_OSR_DOS_CONFIG; + guard(mutex)(&data->mutex); - ret = i2c_smbus_write_byte_data(data->client, AS73211_REG_OSR, data->osr); - if (ret < 0) - goto error_release; - } + if (!iio_device_claim_direct(indio_dev)) + return -EBUSY; ret = _as73211_write_raw(indio_dev, chan, val, val2, mask); + iio_device_release_direct(indio_dev); -error_release: - iio_device_release_direct_mode(indio_dev); -error_unlock: - mutex_unlock(&data->mutex); return ret; } @@ -636,7 +638,7 @@ static irqreturn_t as73211_trigger_handler(int irq __always_unused, void *p) struct as73211_data *data = iio_priv(indio_dev); struct { __le16 chan[4]; - s64 ts __aligned(8); + aligned_s64 ts; } scan; int data_result, ret; @@ -672,9 +674,12 @@ static irqreturn_t as73211_trigger_handler(int irq __always_unused, void *p) /* AS73211 starts reading at address 2 */ ret = i2c_master_recv(data->client, - (char *)&scan.chan[1], 3 * sizeof(scan.chan[1])); + (char *)&scan.chan[0], 3 * sizeof(scan.chan[0])); if (ret < 0) goto done; + + /* Avoid pushing uninitialized data */ + scan.chan[3] = 0; } if (data_result) { @@ -682,9 +687,15 @@ static irqreturn_t as73211_trigger_handler(int irq __always_unused, void *p) * Saturate all channels (in case of overflows). Temperature channel * is not affected by overflows. */ - scan.chan[1] = cpu_to_le16(U16_MAX); - scan.chan[2] = cpu_to_le16(U16_MAX); - scan.chan[3] = cpu_to_le16(U16_MAX); + if (*indio_dev->active_scan_mask == AS73211_SCAN_MASK_ALL) { + scan.chan[1] = cpu_to_le16(U16_MAX); + scan.chan[2] = cpu_to_le16(U16_MAX); + scan.chan[3] = cpu_to_le16(U16_MAX); + } else { + scan.chan[0] = cpu_to_le16(U16_MAX); + scan.chan[1] = cpu_to_le16(U16_MAX); + scan.chan[2] = cpu_to_le16(U16_MAX); + } } iio_push_to_buffers_with_timestamp(indio_dev, &scan, iio_get_time_ns(indio_dev)); @@ -758,6 +769,7 @@ static int as73211_probe(struct i2c_client *client) indio_dev->channels = data->spec_dev->channels; indio_dev->num_channels = data->spec_dev->num_channels; indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->available_scan_masks = as73211_scan_masks; ret = i2c_smbus_read_byte_data(data->client, AS73211_REG_OSR); if (ret < 0) |