}
#ifdef CONFIG_OF
+int matrix_keypad_parse_of_params(struct device *dev,
+ unsigned int *rows, unsigned int *cols)
+{
+ struct device_node *np = dev->of_node;
+
+ if (!np) {
+ dev_err(dev, "missing DT data");
+ return -EINVAL;
+ }
+ of_property_read_u32(np, "keypad,num-rows", rows);
+ of_property_read_u32(np, "keypad,num-columns", cols);
+ if (!*rows || !*cols) {
+ dev_err(dev, "number of keypad rows/columns not specified\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(matrix_keypad_parse_of_params);
+
static int matrix_keypad_parse_of_keymap(const char *propname,
unsigned int rows, unsigned int cols,
struct input_dev *input_dev)