Input: imx_keypad - add device tree support

This patch adds device tree support for imx keypad driver.

Signed-off-by: Liu Ying <Ying.Liu@freescale.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 25 insertions, 18 deletions

diff --git a/drivers/input/keyboard/imx_keypad.c b/drivers/input/keyboard/imx_keypad.c
index 6d150e3e1f55..98f9113251d2 100644
--- a/drivers/input/keyboard/imx_keypad.c
+++ b/drivers/input/keyboard/imx_keypad.c
@@ -20,6 +20,7 @@
 #include <linux/jiffies.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/timer.h>
@@ -414,15 +415,23 @@ open_err:
         return -EIO;
 }
 
+#ifdef CONFIG_OF
+static struct of_device_id imx_keypad_of_match[] = {
+        { .compatible = "fsl,imx21-kpp", },
+        { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_keypad_of_match);
+#endif
+
 static int imx_keypad_probe(struct platform_device *pdev)
 {
         const struct matrix_keymap_data *keymap_data = pdev->dev.platform_data;
         struct imx_keypad *keypad;
         struct input_dev *input_dev;
         struct resource *res;
-        int irq, error, i;
+        int irq, error, i, row, col;
 
-        if (keymap_data == NULL) {
+        if (!keymap_data && !pdev->dev.of_node) {
                 dev_err(&pdev->dev, "no keymap defined\n");
                 return -EINVAL;
         }
@@ -480,22 +489,6 @@ static int imx_keypad_probe(struct platform_device *pdev)
                 goto failed_unmap;
         }
 
-        /* Search for rows and cols enabled */
-        for (i = 0; i < keymap_data->keymap_size; i++) {
-                keypad->rows_en_mask |= 1 << KEY_ROW(keymap_data->keymap[i]);
-                keypad->cols_en_mask |= 1 << KEY_COL(keymap_data->keymap[i]);
-        }
-
-        if (keypad->rows_en_mask > ((1 << MAX_MATRIX_KEY_ROWS) - 1) ||
-            keypad->cols_en_mask > ((1 << MAX_MATRIX_KEY_COLS) - 1)) {
-                dev_err(&pdev->dev,
-                        "invalid key data (too many rows or colums)\n");
-                error = -EINVAL;
-                goto failed_clock_put;
-        }
-        dev_dbg(&pdev->dev, "enabled rows mask: %x\n", keypad->rows_en_mask);
-        dev_dbg(&pdev->dev, "enabled cols mask: %x\n", keypad->cols_en_mask);
-
         /* Init the Input device */
         input_dev->name = pdev->name;
         input_dev->id.bustype = BUS_HOST;
@@ -512,6 +505,19 @@ static int imx_keypad_probe(struct platform_device *pdev)
                 goto failed_clock_put;
         }
 
+        /* Search for rows and cols enabled */
+        for (row = 0; row < MAX_MATRIX_KEY_ROWS; row++) {
+                for (col = 0; col < MAX_MATRIX_KEY_COLS; col++) {
+                        i = MATRIX_SCAN_CODE(row, col, MATRIX_ROW_SHIFT);
+                        if (keypad->keycodes[i] != KEY_RESERVED) {
+                                keypad->rows_en_mask |= 1 << row;
+                                keypad->cols_en_mask |= 1 << col;
+                        }
+                }
+        }
+        dev_dbg(&pdev->dev, "enabled rows mask: %x\n", keypad->rows_en_mask);
+        dev_dbg(&pdev->dev, "enabled cols mask: %x\n", keypad->cols_en_mask);
+
         __set_bit(EV_REP, input_dev->evbit);
         input_set_capability(input_dev, EV_MSC, MSC_SCAN);
         input_set_drvdata(input_dev, keypad);
@@ -631,6 +637,7 @@ static struct platform_driver imx_keypad_driver = {
                 .name   = "imx-keypad",
                 .owner  = THIS_MODULE,
                 .pm     = &imx_kbd_pm_ops,
+                .of_match_table = of_match_ptr(imx_keypad_of_match),
         },
         .probe          = imx_keypad_probe,
         .remove         = imx_keypad_remove,