Input: matrix-keypad - add function to build device keymap

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

3 files changed, 37 insertions, 26 deletions

diff --git a/drivers/input/keyboard/matrix_keypad.c b/drivers/input/keyboard/matrix_keypad.c
index 541b981ff075..91cfe5170265 100644
--- a/drivers/input/keyboard/matrix_keypad.c
+++ b/drivers/input/keyboard/matrix_keypad.c
@@ -319,7 +319,6 @@ static int __devinit matrix_keypad_probe(struct platform_device *pdev)
         struct input_dev *input_dev;
         unsigned short *keycodes;
         unsigned int row_shift;
-        int i;
         int err;
 
         pdata = pdev->dev.platform_data;
@@ -363,18 +362,10 @@ static int __devinit matrix_keypad_probe(struct platform_device *pdev)
 
         input_dev->keycode      = keycodes;
         input_dev->keycodesize  = sizeof(*keycodes);
-        input_dev->keycodemax   = pdata->num_row_gpios << keypad->row_shift;
-
-        for (i = 0; i < keymap_data->keymap_size; i++) {
-                unsigned int key = keymap_data->keymap[i];
-                unsigned int row = KEY_ROW(key);
-                unsigned int col = KEY_COL(key);
-                unsigned short code = KEY_VAL(key);
+        input_dev->keycodemax   = pdata->num_row_gpios << row_shift;
 
-                keycodes[MATRIX_SCAN_CODE(row, col, row_shift)] = code;
-                __set_bit(code, input_dev->keybit);
-        }
-        __clear_bit(KEY_RESERVED, input_dev->keybit);
+        matrix_keypad_build_keymap(keymap_data, row_shift,
+                                   input_dev->keycode, input_dev->keybit);
 
         input_set_capability(input_dev, EV_MSC, MSC_SCAN);
         input_set_drvdata(input_dev, keypad);
diff --git a/drivers/input/keyboard/w90p910_keypad.c b/drivers/input/keyboard/w90p910_keypad.c
index b8598ae124ee..2d03dd0f9e07 100644
--- a/drivers/input/keyboard/w90p910_keypad.c
+++ b/drivers/input/keyboard/w90p910_keypad.c
@@ -126,7 +126,6 @@ static int __devinit w90p910_keypad_probe(struct platform_device *pdev)
         struct resource *res;
         int irq;
         int error;
-        int i;
 
         if (!pdata) {
                 dev_err(&pdev->dev, "no platform data defined\n");
@@ -197,19 +196,8 @@ static int __devinit w90p910_keypad_probe(struct platform_device *pdev)
         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
         input_set_capability(input_dev, EV_MSC, MSC_SCAN);
 
-        for (i = 0; i < keymap_data->keymap_size; i++) {
-                unsigned int key = keymap_data->keymap[i];
-                unsigned int row = KEY_ROW(key);
-                unsigned int col = KEY_COL(key);
-                unsigned short keycode = KEY_VAL(key);
-                unsigned int scancode = MATRIX_SCAN_CODE(row, col,
-                                                         W90P910_ROW_SHIFT);
-
-                keypad->keymap[scancode] = keycode;
-                __set_bit(keycode, input_dev->keybit);
-        }
-        __clear_bit(KEY_RESERVED, input_dev->keybit);
-
+        matrix_keypad_build_keymap(keymap_data, W90P910_ROW_SHIFT,
+                                   input_dev->keycode, input_dev->keybit);
 
         error = request_irq(keypad->irq, w90p910_keypad_irq_handler,
                             IRQF_DISABLED, pdev->name, keypad);
diff --git a/include/linux/input/matrix_keypad.h b/include/linux/input/matrix_keypad.h
index 15d5903af2dd..b3cd42d50e16 100644
--- a/include/linux/input/matrix_keypad.h
+++ b/include/linux/input/matrix_keypad.h
@@ -63,4 +63,36 @@ struct matrix_keypad_platform_data {
         bool            wakeup;
 };
 
+/**
+ * matrix_keypad_build_keymap - convert platform keymap into matrix keymap
+ * @keymap_data: keymap supplied by the platform code
+ * @row_shift: number of bits to shift row value by to advance to the next
+ * line in the keymap
+ * @keymap: expanded version of keymap that is suitable for use by
+ * matrix keyboad driver
+ * @keybit: pointer to bitmap of keys supported by input device
+ *
+ * This function converts platform keymap (encoded with KEY() macro) into
+ * an array of keycodes that is suitable for using in a standard matrix
+ * keyboard driver that uses row and col as indices.
+ */
+static inline void
+matrix_keypad_build_keymap(const struct matrix_keymap_data *keymap_data,
+                           unsigned int row_shift,
+                           unsigned short *keymap, unsigned long *keybit)
+{
+        int i;
+
+        for (i = 0; i < keymap_data->keymap_size; i++) {
+                unsigned int key = keymap_data->keymap[i];
+                unsigned int row = KEY_ROW(key);
+                unsigned int col = KEY_COL(key);
+                unsigned short code = KEY_VAL(key);
+
+                keymap[MATRIX_SCAN_CODE(row, col, row_shift)] = code;
+                __set_bit(code, keybit);
+        }
+        __clear_bit(KEY_RESERVED, keybit);
+}
+
 #endif /* _MATRIX_KEYPAD_H */