staging:iio:adc: Add AD7791 driver

This patch adds support for the Analog Devices AD7787, AD7788, AD7789, AD7790
and AD7791 Sigma Delta Analog-to-Digital converters.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/include/linux/platform_data/ad7791.h b/include/linux/platform_data/ad7791.h
new file mode 100644
index 00000000000..f9e4db1b82a
--- /dev/null
+++ b/include/linux/platform_data/ad7791.h
@@ -0,0 +1,17 @@
+#ifndef __LINUX_PLATFORM_DATA_AD7791__
+#define __LINUX_PLATFORM_DATA_AD7791__
+
+/**
+ * struct ad7791_platform_data - AD7791 device platform data
+ * @buffered: If set to true configure the device for buffered input mode.
+ * @burnout_current: If set to true the 100mA burnout current is enabled.
+ * @unipolar: If set to true sample in unipolar mode, if set to false sample in
+ *              bipolar mode.
+ */
+struct ad7791_platform_data {
+        bool buffered;
+        bool burnout_current;
+        bool unipolar;
+};
+
+#endif