diff options
Diffstat (limited to 'drivers/iio/adc/max11100.c')
| -rw-r--r-- | drivers/iio/adc/max11100.c | 49 |
1 files changed, 18 insertions, 31 deletions
diff --git a/drivers/iio/adc/max11100.c b/drivers/iio/adc/max11100.c index 3440539cfdba..520e37f75aac 100644 --- a/drivers/iio/adc/max11100.c +++ b/drivers/iio/adc/max11100.c @@ -8,9 +8,11 @@ */ #include <linux/delay.h> #include <linux/kernel.h> +#include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/regulator/consumer.h> #include <linux/spi/spi.h> +#include <linux/unaligned.h> #include <linux/iio/iio.h> #include <linux/iio/driver.h> @@ -31,13 +33,13 @@ struct max11100_state { struct spi_device *spi; /* - * DMA (thus cache coherency maintenance) requires the + * DMA (thus cache coherency maintenance) may require the * transfer buffers to live in their own cache lines. */ - u8 buffer[3] ____cacheline_aligned; + u8 buffer[3] __aligned(IIO_DMA_MINALIGN); }; -static struct iio_chan_spec max11100_channels[] = { +static const struct iio_chan_spec max11100_channels[] = { { /* [0] */ .type = IIO_VOLTAGE, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | @@ -62,7 +64,7 @@ static int max11100_read_single(struct iio_dev *indio_dev, int *val) return -EINVAL; } - *val = (state->buffer[1] << 8) | state->buffer[2]; + *val = get_unaligned_be16(&state->buffer[1]); return 0; } @@ -100,6 +102,11 @@ static const struct iio_info max11100_info = { .read_raw = max11100_read_raw, }; +static void max11100_regulator_disable(void *reg) +{ + regulator_disable(reg); +} + static int max11100_probe(struct spi_device *spi) { int ret; @@ -110,13 +117,9 @@ static int max11100_probe(struct spi_device *spi) if (!indio_dev) return -ENOMEM; - spi_set_drvdata(spi, indio_dev); - state = iio_priv(indio_dev); state->spi = spi; - indio_dev->dev.parent = &spi->dev; - indio_dev->dev.of_node = spi->dev.of_node; indio_dev->name = "max11100"; indio_dev->info = &max11100_info; indio_dev->modes = INDIO_DIRECT_MODE; @@ -131,42 +134,26 @@ static int max11100_probe(struct spi_device *spi) if (ret) return ret; - ret = iio_device_register(indio_dev); + ret = devm_add_action_or_reset(&spi->dev, max11100_regulator_disable, + state->vref_reg); if (ret) - goto disable_regulator; - - return 0; - -disable_regulator: - regulator_disable(state->vref_reg); - - return ret; -} - -static int max11100_remove(struct spi_device *spi) -{ - struct iio_dev *indio_dev = spi_get_drvdata(spi); - struct max11100_state *state = iio_priv(indio_dev); - - iio_device_unregister(indio_dev); - regulator_disable(state->vref_reg); + return ret; - return 0; + return devm_iio_device_register(&spi->dev, indio_dev); } static const struct of_device_id max11100_ids[] = { - {.compatible = "maxim,max11100"}, - { }, + { .compatible = "maxim,max11100" }, + { } }; MODULE_DEVICE_TABLE(of, max11100_ids); static struct spi_driver max11100_driver = { .driver = { .name = "max11100", - .of_match_table = of_match_ptr(max11100_ids), + .of_match_table = max11100_ids, }, .probe = max11100_probe, - .remove = max11100_remove, }; module_spi_driver(max11100_driver); |