[PATCH 5/6] ASoC: SDCA: Add SDCA Control Range data access helper

[Charles Keepax <ckeepax@opensource.cirrus.com>]

SDCA Ranges are two dimensional arrays of data associated with controls,
add a helper to provide an x,y access mechanism to the data and a helper
to locate a specific value inside a range.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---
 include/sound/sdca_function.h | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/include/sound/sdca_function.h b/include/sound/sdca_function.h
index ca0376903e87c..d7489e3c7e471 100644
--- a/include/sound/sdca_function.h
+++ b/include/sound/sdca_function.h
@@ -1136,6 +1136,25 @@ struct sdca_function_data {
 	unsigned int busy_max_delay;
 };
 
+static inline u32 sdca_range(struct sdca_control_range *range,
+			     unsigned int col, unsigned int row)
+{
+	return range->data[(row * range->cols) + col];
+}
+
+static inline u32 sdca_range_search(struct sdca_control_range *range,
+				    int search_col, int value, int result_col)
+{
+	int i;
+
+	for (i = 0; i < range->rows; i++) {
+		if (sdca_range(range, search_col, i) == value)
+			return sdca_range(range, result_col, i);
+	}
+
+	return 0;
+}
+
 int sdca_parse_function(struct device *dev,
 			struct sdca_function_desc *desc,
 			struct sdca_function_data *function);
-- 
2.39.5