1 files changed, 65 insertions, 0 deletions

diff --git a/include/linux/input/matrix_keypad.h b/include/linux/input/matrix_keypad.h
new file mode 100644
index 000000000000..7964516c6954
--- /dev/null
+++ b/include/linux/input/matrix_keypad.h
@@ -0,0 +1,65 @@
+#ifndef _MATRIX_KEYPAD_H
+#define _MATRIX_KEYPAD_H
+
+#include <linux/types.h>
+#include <linux/input.h>
+
+#define MATRIX_MAX_ROWS         16
+#define MATRIX_MAX_COLS         16
+
+#define KEY(row, col, val)      ((((row) & (MATRIX_MAX_ROWS - 1)) << 24) |\
+                                 (((col) & (MATRIX_MAX_COLS - 1)) << 16) |\
+                                 (val & 0xffff))
+
+#define KEY_ROW(k)              (((k) >> 24) & 0xff)
+#define KEY_COL(k)              (((k) >> 16) & 0xff)
+#define KEY_VAL(k)              ((k) & 0xffff)
+
+/**
+ * struct matrix_keymap_data - keymap for matrix keyboards
+ * @keymap: pointer to array of uint32 values encoded with KEY() macro
+ *      representing keymap
+ * @keymap_size: number of entries (initialized) in this keymap
+ * @max_keymap_size: maximum size of keymap supported by the device
+ *
+ * This structure is supposed to be used by platform code to supply
+ * keymaps to drivers that implement matrix-like keypads/keyboards.
+ */
+struct matrix_keymap_data {
+        const uint32_t *keymap;
+        unsigned int    keymap_size;
+        unsigned int    max_keymap_size;
+};
+
+/**
+ * struct matrix_keypad_platform_data - platform-dependent keypad data
+ * @keymap_data: pointer to &matrix_keymap_data
+ * @row_gpios: array of gpio numbers reporesenting rows
+ * @col_gpios: array of gpio numbers reporesenting colums
+ * @num_row_gpios: actual number of row gpios used by device
+ * @num_col_gpios: actual number of col gpios used by device
+ * @col_scan_delay_us: delay, measured in microseconds, that is
+ *      needed before we can keypad after activating column gpio
+ * @debounce_ms: debounce interval in milliseconds
+ *
+ * This structure represents platform-specific data that use used by
+ * matrix_keypad driver to perform proper initialization.
+ */
+struct matrix_keypad_platform_data {
+        const struct matrix_keymap_data *keymap_data;
+
+        unsigned int    row_gpios[MATRIX_MAX_ROWS];
+        unsigned int    col_gpios[MATRIX_MAX_COLS];
+        unsigned int    num_row_gpios;
+        unsigned int    num_col_gpios;
+
+        unsigned int    col_scan_delay_us;
+
+        /* key debounce interval in milli-second */
+        unsigned int    debounce_ms;
+
+        bool            active_low;
+        bool            wakeup;
+};
+
+#endif /* _MATRIX_KEYPAD_H */