iio: ti_tscadc: provide datasheet_name and scan_type

This patch provides the members "datasheet_name" and scan_type. This is
the remaining part of the earlier patch where I (bigeasy) removed iio_map
because it is now supplied by the device tree. It also static names as
suggested by Jonathan.

Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

1 files changed, 24 insertions, 5 deletions

diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index 2868c0c1b7e0..9939810954f1 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -24,6 +24,8 @@
 #include <linux/iio/iio.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
+#include <linux/iio/machine.h>
+#include <linux/iio/driver.h>
 
 #include <linux/mfd/ti_am335x_tscadc.h>
 
@@ -84,29 +86,46 @@ static void tiadc_step_config(struct tiadc_device *adc_dev)
         am335x_tsc_se_set(adc_dev->mfd_tscadc, step_en);
 }
 
+static const char * const chan_name_ain[] = {
+        "AIN0",
+        "AIN1",
+        "AIN2",
+        "AIN3",
+        "AIN4",
+        "AIN5",
+        "AIN6",
+        "AIN7",
+};
+
 static int tiadc_channel_init(struct iio_dev *indio_dev, int channels)
 {
+        struct tiadc_device *adc_dev = iio_priv(indio_dev);
         struct iio_chan_spec *chan_array;
+        struct iio_chan_spec *chan;
         int i;
 
         indio_dev->num_channels = channels;
-        chan_array = kcalloc(indio_dev->num_channels,
+        chan_array = kcalloc(channels,
                         sizeof(struct iio_chan_spec), GFP_KERNEL);
-
         if (chan_array == NULL)
                 return -ENOMEM;
 
-        for (i = 0; i < (indio_dev->num_channels); i++) {
-                struct iio_chan_spec *chan = chan_array + i;
+        chan = chan_array;
+        for (i = 0; i < channels; i++, chan++) {
+
                 chan->type = IIO_VOLTAGE;
                 chan->indexed = 1;
                 chan->channel = i;
                 chan->info_mask_separate = BIT(IIO_CHAN_INFO_RAW);
+                chan->datasheet_name = chan_name_ain[i];
+                chan->scan_type.sign = 'u';
+                chan->scan_type.realbits = 12;
+                chan->scan_type.storagebits = 32;
         }
 
         indio_dev->channels = chan_array;
 
-        return indio_dev->num_channels;
+        return 0;
 }
 
 static void tiadc_channels_remove(struct iio_dev *indio_dev)