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 <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/staging/iio/adc/Kconfig b/drivers/staging/iio/adc/Kconfig
index e17efb0..9d3062a 100644 (file)
--- 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 fc647a2..0b728b6 100644 (file)
--- 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 df831b3..8618805 100644 (file)
--- 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 956e387..8bd86e7 100644 (file)
--- 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 ffd9d06..b76ca5a 100644 (file)
--- 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},