iio: mxs-lradc: add datasheet name for every usable channel

In order to provide a channel name to in kernel consumers add the
datasheet names for every usable AD channel. Since the channel names
differ between i.MX23 and i.MX28, we need to separate the channel
specs.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/drivers/staging/iio/adc/mxs-lradc.c b/drivers/staging/iio/adc/mxs-lradc.c
index 3a549eff7e7152d77a29ed5434c268f3bde2adcc..3f7715c9968b83b25d6d1a4f6099c29b051db5fd 100644 (file)
--- a/drivers/staging/iio/adc/mxs-lradc.c
+++ b/drivers/staging/iio/adc/mxs-lradc.c
@@ -1365,7 +1365,7 @@ static const struct iio_buffer_setup_ops mxs_lradc_buffer_ops = {
  * Driver initialization
  */
 
-#define MXS_ADC_CHAN(idx, chan_type) {                         \
+#define MXS_ADC_CHAN(idx, chan_type, name) {                   \
        .type = (chan_type),                                    \
        .indexed = 1,                                           \
        .scan_index = (idx),                                    \
@@ -1378,17 +1378,18 @@ static const struct iio_buffer_setup_ops mxs_lradc_buffer_ops = {
                .realbits = LRADC_RESOLUTION,                   \
                .storagebits = 32,                              \
        },                                                      \
+       .datasheet_name = (name),                               \
 }
 
-static const struct iio_chan_spec mxs_lradc_chan_spec[] = {
-       MXS_ADC_CHAN(0, IIO_VOLTAGE),
-       MXS_ADC_CHAN(1, IIO_VOLTAGE),
-       MXS_ADC_CHAN(2, IIO_VOLTAGE),
-       MXS_ADC_CHAN(3, IIO_VOLTAGE),
-       MXS_ADC_CHAN(4, IIO_VOLTAGE),
-       MXS_ADC_CHAN(5, IIO_VOLTAGE),
-       MXS_ADC_CHAN(6, IIO_VOLTAGE),
-       MXS_ADC_CHAN(7, IIO_VOLTAGE),
+static const struct iio_chan_spec mx23_lradc_chan_spec[] = {
+       MXS_ADC_CHAN(0, IIO_VOLTAGE, "LRADC0"),
+       MXS_ADC_CHAN(1, IIO_VOLTAGE, "LRADC1"),
+       MXS_ADC_CHAN(2, IIO_VOLTAGE, "LRADC2"),
+       MXS_ADC_CHAN(3, IIO_VOLTAGE, "LRADC3"),
+       MXS_ADC_CHAN(4, IIO_VOLTAGE, "LRADC4"),
+       MXS_ADC_CHAN(5, IIO_VOLTAGE, "LRADC5"),
+       MXS_ADC_CHAN(6, IIO_VOLTAGE, "VDDIO"),
+       MXS_ADC_CHAN(7, IIO_VOLTAGE, "VBATT"),
        /* Combined Temperature sensors */
        {
                .type = IIO_TEMP,
@@ -1399,6 +1400,7 @@ static const struct iio_chan_spec mxs_lradc_chan_spec[] = {
                                      BIT(IIO_CHAN_INFO_SCALE),
                .channel = 8,
                .scan_type = {.sign = 'u', .realbits = 18, .storagebits = 32,},
+               .datasheet_name = "TEMP_DIE",
        },
        /* Hidden channel to keep indexes */
        {
@@ -1407,12 +1409,48 @@ static const struct iio_chan_spec mxs_lradc_chan_spec[] = {
                .scan_index = -1,
                .channel = 9,
        },
-       MXS_ADC_CHAN(10, IIO_VOLTAGE),
-       MXS_ADC_CHAN(11, IIO_VOLTAGE),
-       MXS_ADC_CHAN(12, IIO_VOLTAGE),
-       MXS_ADC_CHAN(13, IIO_VOLTAGE),
-       MXS_ADC_CHAN(14, IIO_VOLTAGE),
-       MXS_ADC_CHAN(15, IIO_VOLTAGE),
+       MXS_ADC_CHAN(10, IIO_VOLTAGE, NULL),
+       MXS_ADC_CHAN(11, IIO_VOLTAGE, NULL),
+       MXS_ADC_CHAN(12, IIO_VOLTAGE, "USB_DP"),
+       MXS_ADC_CHAN(13, IIO_VOLTAGE, "USB_DN"),
+       MXS_ADC_CHAN(14, IIO_VOLTAGE, "VBG"),
+       MXS_ADC_CHAN(15, IIO_VOLTAGE, "VDD5V"),
+};
+
+static const struct iio_chan_spec mx28_lradc_chan_spec[] = {
+       MXS_ADC_CHAN(0, IIO_VOLTAGE, "LRADC0"),
+       MXS_ADC_CHAN(1, IIO_VOLTAGE, "LRADC1"),
+       MXS_ADC_CHAN(2, IIO_VOLTAGE, "LRADC2"),
+       MXS_ADC_CHAN(3, IIO_VOLTAGE, "LRADC3"),
+       MXS_ADC_CHAN(4, IIO_VOLTAGE, "LRADC4"),
+       MXS_ADC_CHAN(5, IIO_VOLTAGE, "LRADC5"),
+       MXS_ADC_CHAN(6, IIO_VOLTAGE, "LRADC6"),
+       MXS_ADC_CHAN(7, IIO_VOLTAGE, "VBATT"),
+       /* Combined Temperature sensors */
+       {
+               .type = IIO_TEMP,
+               .indexed = 1,
+               .scan_index = 8,
+               .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+                                     BIT(IIO_CHAN_INFO_OFFSET) |
+                                     BIT(IIO_CHAN_INFO_SCALE),
+               .channel = 8,
+               .scan_type = {.sign = 'u', .realbits = 18, .storagebits = 32,},
+               .datasheet_name = "TEMP_DIE",
+       },
+       /* Hidden channel to keep indexes */
+       {
+               .type = IIO_TEMP,
+               .indexed = 1,
+               .scan_index = -1,
+               .channel = 9,
+       },
+       MXS_ADC_CHAN(10, IIO_VOLTAGE, "VDDIO"),
+       MXS_ADC_CHAN(11, IIO_VOLTAGE, "VTH"),
+       MXS_ADC_CHAN(12, IIO_VOLTAGE, "VDDA"),
+       MXS_ADC_CHAN(13, IIO_VOLTAGE, "VDDD"),
+       MXS_ADC_CHAN(14, IIO_VOLTAGE, "VBG"),
+       MXS_ADC_CHAN(15, IIO_VOLTAGE, "VDD5V"),
 };
 
 static int mxs_lradc_hw_init(struct mxs_lradc *lradc)
@@ -1608,10 +1646,16 @@ static int mxs_lradc_probe(struct platform_device *pdev)
        iio->dev.parent = &pdev->dev;
        iio->info = &mxs_lradc_iio_info;
        iio->modes = INDIO_DIRECT_MODE;
-       iio->channels = mxs_lradc_chan_spec;
-       iio->num_channels = ARRAY_SIZE(mxs_lradc_chan_spec);
        iio->masklength = LRADC_MAX_TOTAL_CHANS;
 
+       if (lradc->soc == IMX23_LRADC) {
+               iio->channels = mx23_lradc_chan_spec;
+               iio->num_channels = ARRAY_SIZE(mx23_lradc_chan_spec);
+       } else {
+               iio->channels = mx28_lradc_chan_spec;
+               iio->num_channels = ARRAY_SIZE(mx28_lradc_chan_spec);
+       }
+
        ret = iio_triggered_buffer_setup(iio, &iio_pollfunc_store_time,
                                &mxs_lradc_trigger_handler,
                                &mxs_lradc_buffer_ops);