diff options
Diffstat (limited to 'drivers/staging/iio/adc/ad7606.c')
| -rw-r--r-- | drivers/staging/iio/adc/ad7606.c | 42 |
1 files changed, 34 insertions, 8 deletions
diff --git a/drivers/staging/iio/adc/ad7606.c b/drivers/staging/iio/adc/ad7606.c index b7810b1aad07..048c205b979e 100644 --- a/drivers/staging/iio/adc/ad7606.c +++ b/drivers/staging/iio/adc/ad7606.c @@ -26,9 +26,12 @@ #include "ad7606.h" -/* Scales are computed as 2.5/2**16 and 5/2**16 respectively */ +/* + * Scales are computed as 5000/32768 and 10000/32768 respectively, + * so that when applied to the raw values they provide mV values + */ static const unsigned int scale_avail[2][2] = { - {0, 38147}, {0, 76294} + {0, 152588}, {0, 305176} }; static int ad7606_reset(struct ad7606_state *st) @@ -271,7 +274,7 @@ static const struct attribute_group ad7606_attribute_group_range = { .attrs = ad7606_attributes_range, }; -#define AD7606_CHANNEL(num) \ +#define AD760X_CHANNEL(num, mask) \ { \ .type = IIO_VOLTAGE, \ .indexed = 1, \ @@ -279,8 +282,7 @@ static const struct attribute_group ad7606_attribute_group_range = { .address = num, \ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),\ - .info_mask_shared_by_all = \ - BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \ + .info_mask_shared_by_all = mask, \ .scan_index = num, \ .scan_type = { \ .sign = 's', \ @@ -290,6 +292,20 @@ static const struct attribute_group ad7606_attribute_group_range = { }, \ } +#define AD7605_CHANNEL(num) \ + AD760X_CHANNEL(num, 0) + +#define AD7606_CHANNEL(num) \ + AD760X_CHANNEL(num, BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO)) + +static const struct iio_chan_spec ad7605_channels[] = { + IIO_CHAN_SOFT_TIMESTAMP(4), + AD7605_CHANNEL(0), + AD7605_CHANNEL(1), + AD7605_CHANNEL(2), + AD7605_CHANNEL(3), +}; + static const struct iio_chan_spec ad7606_channels[] = { IIO_CHAN_SOFT_TIMESTAMP(8), AD7606_CHANNEL(0), @@ -306,17 +322,24 @@ static const struct ad7606_chip_info ad7606_chip_info_tbl[] = { /* * More devices added in future */ + [ID_AD7605_4] = { + .channels = ad7605_channels, + .num_channels = 5, + }, [ID_AD7606_8] = { .channels = ad7606_channels, .num_channels = 9, + .has_oversampling = true, }, [ID_AD7606_6] = { .channels = ad7606_channels, .num_channels = 7, + .has_oversampling = true, }, [ID_AD7606_4] = { .channels = ad7606_channels, .num_channels = 5, + .has_oversampling = true, }, }; @@ -347,6 +370,9 @@ static int ad7606_request_gpios(struct ad7606_state *st) if (IS_ERR(st->gpio_frstdata)) return PTR_ERR(st->gpio_frstdata); + if (!st->chip_info->has_oversampling) + return 0; + st->gpio_os = devm_gpiod_get_array_optional(dev, "oversampling-ratio", GPIOD_OUT_LOW); return PTR_ERR_OR_ZERO(st->gpio_os); @@ -425,12 +451,12 @@ int ad7606_probe(struct device *dev, int irq, void __iomem *base_address, return ret; } + st->chip_info = &ad7606_chip_info_tbl[id]; + ret = ad7606_request_gpios(st); if (ret) goto error_disable_reg; - st->chip_info = &ad7606_chip_info_tbl[id]; - indio_dev->dev.parent = dev; if (st->gpio_os) { if (st->gpio_range) @@ -532,6 +558,6 @@ EXPORT_SYMBOL_GPL(ad7606_pm_ops); #endif -MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); +MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>"); MODULE_DESCRIPTION("Analog Devices AD7606 ADC"); MODULE_LICENSE("GPL v2"); |