diff options
Diffstat (limited to 'drivers/iio/dac/ad5064.c')
| -rw-r--r-- | drivers/iio/dac/ad5064.c | 70 |
1 files changed, 22 insertions, 48 deletions
diff --git a/drivers/iio/dac/ad5064.c b/drivers/iio/dac/ad5064.c index d33642de9720..4447b8811827 100644 --- a/drivers/iio/dac/ad5064.c +++ b/drivers/iio/dac/ad5064.c @@ -68,8 +68,8 @@ enum ad5064_regmap_type { * struct ad5064_chip_info - chip specific information * @shared_vref: whether the vref supply is shared between channels * @internal_vref: internal reference voltage. 0 if the chip has no - internal vref. - * @channel: channel specification + * internal vref. + * @channels: channel specification * @num_channels: number of channels * @regmap_type: register map layout variant */ @@ -98,6 +98,7 @@ typedef int (*ad5064_write_func)(struct ad5064_state *st, unsigned int cmd, * @use_internal_vref: set to true if the internal reference voltage should be * used. * @write: register write callback + * @lock: maintain consistency between cached and dev state * @data: i2c/spi transfer buffers */ @@ -111,17 +112,16 @@ struct ad5064_state { bool use_internal_vref; ad5064_write_func write; - /* Lock used to maintain consistency between cached and dev state */ struct mutex lock; /* - * DMA (thus cache coherency maintenance) requires the + * DMA (thus cache coherency maintenance) may require the * transfer buffers to live in their own cache lines. */ union { u8 i2c[3]; __be32 spi; - } data ____cacheline_aligned; + } data __aligned(IIO_DMA_MINALIGN); }; enum ad5064_type { @@ -277,7 +277,7 @@ static ssize_t ad5064_read_dac_powerdown(struct iio_dev *indio_dev, { struct ad5064_state *st = iio_priv(indio_dev); - return sprintf(buf, "%d\n", st->pwr_down[chan->channel]); + return sysfs_emit(buf, "%d\n", st->pwr_down[chan->channel]); } static ssize_t ad5064_write_dac_powerdown(struct iio_dev *indio_dev, @@ -288,7 +288,7 @@ static ssize_t ad5064_write_dac_powerdown(struct iio_dev *indio_dev, bool pwr_down; int ret; - ret = strtobool(buf, &pwr_down); + ret = kstrtobool(buf, &pwr_down); if (ret) return ret; @@ -377,7 +377,7 @@ static const struct iio_chan_spec_ext_info ad5064_ext_info[] = { .shared = IIO_SEPARATE, }, IIO_ENUM("powerdown_mode", IIO_SEPARATE, &ad5064_powerdown_mode_enum), - IIO_ENUM_AVAILABLE("powerdown_mode", &ad5064_powerdown_mode_enum), + IIO_ENUM_AVAILABLE("powerdown_mode", IIO_SHARED_BY_TYPE, &ad5064_powerdown_mode_enum), { }, }; @@ -389,7 +389,7 @@ static const struct iio_chan_spec_ext_info ltc2617_ext_info[] = { .shared = IIO_SEPARATE, }, IIO_ENUM("powerdown_mode", IIO_SEPARATE, <c2617_powerdown_mode_enum), - IIO_ENUM_AVAILABLE("powerdown_mode", <c2617_powerdown_mode_enum), + IIO_ENUM_AVAILABLE("powerdown_mode", IIO_SHARED_BY_TYPE, <c2617_powerdown_mode_enum), { }, }; @@ -787,7 +787,7 @@ static const char * const ad5064_vref_names[] = { "vrefD", }; -static const char * const ad5064_vref_name(struct ad5064_state *st, +static const char *ad5064_vref_name(struct ad5064_state *st, unsigned int vref) { return st->chip_info->shared_vref ? "vref" : ad5064_vref_names[vref]; @@ -843,6 +843,13 @@ static int ad5064_request_vref(struct ad5064_state *st, struct device *dev) return ret; } +static void ad5064_bulk_reg_disable(void *data) +{ + struct ad5064_state *st = data; + + regulator_bulk_disable(ad5064_num_vref(st), st->vref_reg); +} + static int ad5064_probe(struct device *dev, enum ad5064_type type, const char *name, ad5064_write_func write) { @@ -858,7 +865,6 @@ static int ad5064_probe(struct device *dev, enum ad5064_type type, st = iio_priv(indio_dev); mutex_init(&st->lock); - dev_set_drvdata(dev, indio_dev); st->chip_info = &ad5064_chip_info_tbl[type]; st->dev = dev; @@ -872,9 +878,12 @@ static int ad5064_probe(struct device *dev, enum ad5064_type type, ret = regulator_bulk_enable(ad5064_num_vref(st), st->vref_reg); if (ret) return ret; + + ret = devm_add_action_or_reset(dev, ad5064_bulk_reg_disable, st); + if (ret) + return ret; } - indio_dev->dev.parent = dev; indio_dev->name = name; indio_dev->info = &ad5064_info; indio_dev->modes = INDIO_DIRECT_MODE; @@ -888,30 +897,7 @@ static int ad5064_probe(struct device *dev, enum ad5064_type type, st->dac_cache[i] = midscale; } - ret = iio_device_register(indio_dev); - if (ret) - goto error_disable_reg; - - return 0; - -error_disable_reg: - if (!st->use_internal_vref) - regulator_bulk_disable(ad5064_num_vref(st), st->vref_reg); - - return ret; -} - -static int ad5064_remove(struct device *dev) -{ - struct iio_dev *indio_dev = dev_get_drvdata(dev); - struct ad5064_state *st = iio_priv(indio_dev); - - iio_device_unregister(indio_dev); - - if (!st->use_internal_vref) - regulator_bulk_disable(ad5064_num_vref(st), st->vref_reg); - - return 0; + return devm_iio_device_register(dev, indio_dev); } #if IS_ENABLED(CONFIG_SPI_MASTER) @@ -933,11 +919,6 @@ static int ad5064_spi_probe(struct spi_device *spi) ad5064_spi_write); } -static int ad5064_spi_remove(struct spi_device *spi) -{ - return ad5064_remove(&spi->dev); -} - static const struct spi_device_id ad5064_spi_ids[] = { {"ad5024", ID_AD5024}, {"ad5025", ID_AD5025}, @@ -964,7 +945,6 @@ static struct spi_driver ad5064_spi_driver = { .name = "ad5064", }, .probe = ad5064_spi_probe, - .remove = ad5064_spi_remove, .id_table = ad5064_spi_ids, }; @@ -1020,11 +1000,6 @@ static int ad5064_i2c_probe(struct i2c_client *i2c, ad5064_i2c_write); } -static int ad5064_i2c_remove(struct i2c_client *i2c) -{ - return ad5064_remove(&i2c->dev); -} - static const struct i2c_device_id ad5064_i2c_ids[] = { {"ad5625", ID_AD5625 }, {"ad5625r-1v25", ID_AD5625R_1V25 }, @@ -1082,7 +1057,6 @@ static struct i2c_driver ad5064_i2c_driver = { .name = "ad5064", }, .probe = ad5064_i2c_probe, - .remove = ad5064_i2c_remove, .id_table = ad5064_i2c_ids, }; |