From bb9fc6adac54c6811ccd0b7fe309be859effdc02 Mon Sep 17 00:00:00 2001 From: Alexandru Ardelean Date: Thu, 13 Sep 2018 14:02:12 +0300 Subject: staging:iio:ad7606: Add support for the ad7605-4 Add support for the AD7605-4 to the AD7606 driver. The AD7605-4 is mostly interface compatible to the AD7606-6 with the only difference being not having support for oversampling. Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron --- drivers/staging/iio/adc/Kconfig | 2 +- drivers/staging/iio/adc/ad7606.c | 33 ++++++++++++++++++++++++++++----- drivers/staging/iio/adc/ad7606.h | 3 +++ drivers/staging/iio/adc/ad7606_par.c | 3 +++ drivers/staging/iio/adc/ad7606_spi.c | 1 + 5 files changed, 36 insertions(+), 6 deletions(-) (limited to 'drivers/staging/iio') diff --git a/drivers/staging/iio/adc/Kconfig b/drivers/staging/iio/adc/Kconfig index e17efb03bac0..9d3062a07460 100644 --- a/drivers/staging/iio/adc/Kconfig +++ b/drivers/staging/iio/adc/Kconfig @@ -11,7 +11,7 @@ config AD7606 select IIO_TRIGGERED_BUFFER help Say yes here to build support for Analog Devices: - ad7606, ad7606-6, ad7606-4 analog to digital converters (ADC). + ad7605-4, ad7606, ad7606-6, ad7606-4 analog to digital converters (ADC). To compile this driver as a module, choose M here: the module will be called ad7606. diff --git a/drivers/staging/iio/adc/ad7606.c b/drivers/staging/iio/adc/ad7606.c index fc647a238405..0b728b6ea135 100644 --- a/drivers/staging/iio/adc/ad7606.c +++ b/drivers/staging/iio/adc/ad7606.c @@ -276,7 +276,7 @@ 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, \ @@ -284,8 +284,7 @@ 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', \ @@ -295,6 +294,20 @@ 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), @@ -311,17 +324,24 @@ 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, }, }; @@ -352,6 +372,9 @@ 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); @@ -430,12 +453,12 @@ 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) diff --git a/drivers/staging/iio/adc/ad7606.h b/drivers/staging/iio/adc/ad7606.h index df831b347a0a..86188054b60b 100644 --- a/drivers/staging/iio/adc/ad7606.h +++ b/drivers/staging/iio/adc/ad7606.h @@ -13,11 +13,13 @@ * struct ad7606_chip_info - chip specific information * @channels: channel specification * @num_channels: number of channels + * @has_oversampling: whether the device has oversampling support */ struct ad7606_chip_info { const struct iio_chan_spec *channels; unsigned int num_channels; + bool has_oversampling; }; /** @@ -88,6 +90,7 @@ int ad7606_probe(struct device *dev, int irq, void __iomem *base_address, int ad7606_remove(struct device *dev, int irq); enum ad7606_supported_device_ids { + ID_AD7605_4, ID_AD7606_8, ID_AD7606_6, ID_AD7606_4 diff --git a/drivers/staging/iio/adc/ad7606_par.c b/drivers/staging/iio/adc/ad7606_par.c index 956e38774767..8bd86e727b02 100644 --- a/drivers/staging/iio/adc/ad7606_par.c +++ b/drivers/staging/iio/adc/ad7606_par.c @@ -79,6 +79,9 @@ static int ad7606_par_remove(struct platform_device *pdev) static const struct platform_device_id ad7606_driver_ids[] = { { + .name = "ad7605-4", + .driver_data = ID_AD7605_4, + }, { .name = "ad7606-8", .driver_data = ID_AD7606_8, }, { diff --git a/drivers/staging/iio/adc/ad7606_spi.c b/drivers/staging/iio/adc/ad7606_spi.c index ffd9d0626ec2..b76ca5a8c059 100644 --- a/drivers/staging/iio/adc/ad7606_spi.c +++ b/drivers/staging/iio/adc/ad7606_spi.c @@ -55,6 +55,7 @@ static int ad7606_spi_remove(struct spi_device *spi) } static const struct spi_device_id ad7606_id[] = { + {"ad7605-4", ID_AD7605_4}, {"ad7606-8", ID_AD7606_8}, {"ad7606-6", ID_AD7606_6}, {"ad7606-4", ID_AD7606_4}, -- cgit v1.2.3-70-g09d2