diff --git a/drivers/iio/adc/ad7124.c b/drivers/iio/adc/ad7124.c index 910b40393f77..ad6edbc792db 100644 --- a/drivers/iio/adc/ad7124.c +++ b/drivers/iio/adc/ad7124.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include #include @@ -223,6 +224,7 @@ struct ad7124_state { */ unsigned int gain_default; DECLARE_KFIFO(live_cfgs_fifo, struct ad7124_channel_config *, AD7124_MAX_CONFIGS); + bool enable_single_cycle; }; static const struct ad7124_chip_info ad7124_4_chip_info = { @@ -560,13 +562,15 @@ static int ad7124_write_config(struct ad7124_state *st, struct ad7124_channel_co * sampling frequency even when only one channel is enabled in a * buffered read. If it was not set, the N in ad7124_set_channel_odr() * would be 1 and we would get a faster sampling frequency than what - * was requested. + * was requested. It may only be disabled through debugfs for testing + * purposes. */ return ad_sd_write_reg(&st->sd, AD7124_FILTER(cfg->cfg_slot), 3, FIELD_PREP(AD7124_FILTER_FILTER, filter) | FIELD_PREP(AD7124_FILTER_REJ60, rej60) | FIELD_PREP(AD7124_FILTER_POST_FILTER, post) | - AD7124_FILTER_SINGLE_CYCLE | + FIELD_PREP(AD7124_FILTER_SINGLE_CYCLE, + st->enable_single_cycle) | FIELD_PREP(AD7124_FILTER_FS, cfg->odr_sel_bits)); } @@ -1609,6 +1613,18 @@ static void ad7124_reg_disable(void *r) regulator_disable(r); } +static void ad7124_debugfs_init(struct iio_dev *indio_dev) +{ + struct dentry *dentry = iio_get_debugfs_dentry(indio_dev); + struct ad7124_state *st = iio_priv(indio_dev); + + if (!IS_ENABLED(CONFIG_DEBUG_FS)) + return; + + debugfs_create_bool("enable_single_cycle", 0644, dentry, + &st->enable_single_cycle); +} + static int ad7124_probe(struct spi_device *spi) { const struct ad7124_chip_info *info; @@ -1629,6 +1645,9 @@ static int ad7124_probe(struct spi_device *spi) st->chip_info = info; + /* Only disabled for debug/testing purposes. */ + st->enable_single_cycle = true; + indio_dev->name = st->chip_info->name; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &ad7124_info; @@ -1686,6 +1705,8 @@ static int ad7124_probe(struct spi_device *spi) if (ret < 0) return dev_err_probe(dev, ret, "Failed to register iio device\n"); + ad7124_debugfs_init(indio_dev); + return 0; }