iio/adc: ingenic: Retrieve channels list from soc data struct

Instead of having one array of struct iio_chan_spec for all SoCs, and
have some SoCs remove the last item of the array as they can't use it,
have each SoC define its array of supported channels.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Tested-by: Artur Rojek <contact@artur-rojek.eu>
Signed-off-by: Artur Rojek <contact@artur-rojek.eu>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/ingenic-adc.c b/drivers/iio/adc/ingenic-adc.c
index a742724..16fc097 100644 (file)
--- a/drivers/iio/adc/ingenic-adc.c
+++ b/drivers/iio/adc/ingenic-adc.c
@@ -55,6 +55,8 @@ struct ingenic_adc_soc_data {
        size_t battery_scale_avail_size;
        unsigned int battery_vref_mode: 1;
        unsigned int has_aux2: 1;
+       const struct iio_chan_spec *channels;
+       unsigned int num_channels;
        int (*init_clk_div)(struct device *dev, struct ingenic_adc *adc);
 };
 
@@ -262,6 +264,61 @@ static int jz4770_adc_init_clk_div(struct device *dev, struct ingenic_adc *adc)
        return 0;
 }
 
+static const struct iio_chan_spec jz4740_channels[] = {
+       {
+               .extend_name = "aux",
+               .type = IIO_VOLTAGE,
+               .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+                                     BIT(IIO_CHAN_INFO_SCALE),
+               .indexed = 1,
+               .channel = INGENIC_ADC_AUX,
+               .scan_index = -1,
+       },
+       {
+               .extend_name = "battery",
+               .type = IIO_VOLTAGE,
+               .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+                                     BIT(IIO_CHAN_INFO_SCALE),
+               .info_mask_separate_available = BIT(IIO_CHAN_INFO_RAW) |
+                                               BIT(IIO_CHAN_INFO_SCALE),
+               .indexed = 1,
+               .channel = INGENIC_ADC_BATTERY,
+               .scan_index = -1,
+       },
+};
+
+static const struct iio_chan_spec jz4770_channels[] = {
+       {
+               .extend_name = "aux",
+               .type = IIO_VOLTAGE,
+               .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+                                     BIT(IIO_CHAN_INFO_SCALE),
+               .indexed = 1,
+               .channel = INGENIC_ADC_AUX,
+               .scan_index = -1,
+       },
+       {
+               .extend_name = "battery",
+               .type = IIO_VOLTAGE,
+               .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+                                     BIT(IIO_CHAN_INFO_SCALE),
+               .info_mask_separate_available = BIT(IIO_CHAN_INFO_RAW) |
+                                               BIT(IIO_CHAN_INFO_SCALE),
+               .indexed = 1,
+               .channel = INGENIC_ADC_BATTERY,
+               .scan_index = -1,
+       },
+       {
+               .extend_name = "aux2",
+               .type = IIO_VOLTAGE,
+               .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+                                     BIT(IIO_CHAN_INFO_SCALE),
+               .indexed = 1,
+               .channel = INGENIC_ADC_AUX2,
+               .scan_index = -1,
+       },
+};
+
 static const struct ingenic_adc_soc_data jz4725b_adc_soc_data = {
        .battery_high_vref = JZ4725B_ADC_BATTERY_HIGH_VREF,
        .battery_high_vref_bits = JZ4725B_ADC_BATTERY_HIGH_VREF_BITS,
@@ -271,6 +328,8 @@ static const struct ingenic_adc_soc_data jz4725b_adc_soc_data = {
        .battery_scale_avail_size = ARRAY_SIZE(jz4725b_adc_battery_scale_avail),
        .battery_vref_mode = true,
        .has_aux2 = false,
+       .channels = jz4740_channels,
+       .num_channels = ARRAY_SIZE(jz4740_channels),
        .init_clk_div = jz4725b_adc_init_clk_div,
 };
 
@@ -283,6 +342,8 @@ static const struct ingenic_adc_soc_data jz4740_adc_soc_data = {
        .battery_scale_avail_size = ARRAY_SIZE(jz4740_adc_battery_scale_avail),
        .battery_vref_mode = true,
        .has_aux2 = false,
+       .channels = jz4740_channels,
+       .num_channels = ARRAY_SIZE(jz4740_channels),
        .init_clk_div = NULL, /* no ADCLK register on JZ4740 */
 };
 
@@ -295,6 +356,8 @@ static const struct ingenic_adc_soc_data jz4770_adc_soc_data = {
        .battery_scale_avail_size = ARRAY_SIZE(jz4770_adc_battery_scale_avail),
        .battery_vref_mode = false,
        .has_aux2 = true,
+       .channels = jz4770_channels,
+       .num_channels = ARRAY_SIZE(jz4770_channels),
        .init_clk_div = jz4770_adc_init_clk_div,
 };
 
@@ -428,35 +491,6 @@ static const struct iio_info ingenic_adc_info = {
        .of_xlate = ingenic_adc_of_xlate,
 };
 
-static const struct iio_chan_spec ingenic_channels[] = {
-       {
-               .extend_name = "aux",
-               .type = IIO_VOLTAGE,
-               .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
-                                     BIT(IIO_CHAN_INFO_SCALE),
-               .indexed = 1,
-               .channel = INGENIC_ADC_AUX,
-       },
-       {
-               .extend_name = "battery",
-               .type = IIO_VOLTAGE,
-               .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
-                                     BIT(IIO_CHAN_INFO_SCALE),
-               .info_mask_separate_available = BIT(IIO_CHAN_INFO_RAW) |
-                                               BIT(IIO_CHAN_INFO_SCALE),
-               .indexed = 1,
-               .channel = INGENIC_ADC_BATTERY,
-       },
-       { /* Must always be last in the array. */
-               .extend_name = "aux2",
-               .type = IIO_VOLTAGE,
-               .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
-                                     BIT(IIO_CHAN_INFO_SCALE),
-               .indexed = 1,
-               .channel = INGENIC_ADC_AUX2,
-       },
-};
-
 static int ingenic_adc_probe(struct platform_device *pdev)
 {
        struct device *dev = &pdev->dev;
@@ -518,11 +552,8 @@ static int ingenic_adc_probe(struct platform_device *pdev)
        iio_dev->dev.parent = dev;
        iio_dev->name = "jz-adc";
        iio_dev->modes = INDIO_DIRECT_MODE;
-       iio_dev->channels = ingenic_channels;
-       iio_dev->num_channels = ARRAY_SIZE(ingenic_channels);
-       /* Remove AUX2 from the list of supported channels. */
-       if (!adc->soc_data->has_aux2)
-               iio_dev->num_channels -= 1;
+       iio_dev->channels = soc_data->channels;
+       iio_dev->num_channels = soc_data->num_channels;
        iio_dev->info = &ingenic_adc_info;
 
        ret = devm_iio_device_register(dev, iio_dev);