IIO : ADC: tiadc: Add support of TI's ADC driver

This patch adds support for TI's ADC driver.
This is a multifunctional device.
Analog input lines are provided on which
voltage measurements can be carried out.
You can have upto 8 input lines.

Signed-off-by: Patil, Rachna <rachna@ti.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

2 files changed, 22 insertions, 1 deletions

diff --git a/include/linux/mfd/ti_am335x_tscadc.h b/include/linux/mfd/ti_am335x_tscadc.h
index fc18b2ef753..c79ad5d2f27 100644
--- a/include/linux/mfd/ti_am335x_tscadc.h
+++ b/include/linux/mfd/ti_am335x_tscadc.h
@@ -120,15 +120,19 @@
 
 #define ADC_CLK                 3000000
 #define MAX_CLK_DIV             7
+#define TOTAL_STEPS             16
+#define TOTAL_CHANNELS          8
 
-#define TSCADC_CELLS            1
+#define TSCADC_CELLS            2
 
 enum tscadc_cells {
         TSC_CELL,
+        ADC_CELL,
 };
 
 struct mfd_tscadc_board {
         struct tsc_data *tsc_init;
+        struct adc_data *adc_init;
 };
 
 struct ti_tscadc_dev {
@@ -140,6 +144,9 @@ struct ti_tscadc_dev {
 
         /* tsc device */
         struct titsc *tsc;
+
+        /* adc device */
+        struct adc_device *adc;
 };
 
 #endif
diff --git a/include/linux/platform_data/ti_am335x_adc.h b/include/linux/platform_data/ti_am335x_adc.h
new file mode 100644
index 00000000000..e41d5834cb8
--- /dev/null
+++ b/include/linux/platform_data/ti_am335x_adc.h
@@ -0,0 +1,14 @@
+#ifndef __LINUX_TI_AM335X_ADC_H
+#define __LINUX_TI_AM335X_ADC_H
+
+/**
+ * struct adc_data      ADC Input information
+ * @adc_channels:       Number of analog inputs
+ *                      available for ADC.
+ */
+
+struct adc_data {
+        unsigned int adc_channels;
+};
+
+#endif