Input: stmpe-keypad - add support for Device Tree bindings

[~andy/linux] / drivers / input / keyboard / stmpe-keypad.c

diff --git a/drivers/input/keyboard/stmpe-keypad.c b/drivers/input/keyboard/stmpe-keypad.c
index 7bac0524900a4e0a475fce2c962e2785bae89a15..5cbec56f772000f2b10836ef6585c65472f96b2d 100644 (file)
--- a/drivers/input/keyboard/stmpe-keypad.c
+++ b/drivers/input/keyboard/stmpe-keypad.c
@@ -257,6 +257,51 @@ static int stmpe_keypad_chip_init(struct stmpe_keypad *keypad)
                              (plat->debounce_ms << 1));
 }
 
+static void stmpe_keypad_fill_used_pins(struct stmpe_keypad *keypad)
+{
+       int row, col;
+
+       for (row = 0; row < STMPE_KEYPAD_MAX_ROWS; row++) {
+               for (col = 0; col < STMPE_KEYPAD_MAX_COLS; col++) {
+                       int code = MATRIX_SCAN_CODE(row, col,
+                                               STMPE_KEYPAD_ROW_SHIFT);
+                       if (keypad->keymap[code] != KEY_RESERVED) {
+                               keypad->rows |= 1 << row;
+                               keypad->cols |= 1 << col;
+                       }
+               }
+       }
+}
+
+#ifdef CONFIG_OF
+static const struct stmpe_keypad_platform_data *
+stmpe_keypad_of_probe(struct device *dev)
+{
+       struct device_node *np = dev->of_node;
+       struct stmpe_keypad_platform_data *plat;
+
+       if (!np)
+               return ERR_PTR(-ENODEV);
+
+       plat = devm_kzalloc(dev, sizeof(*plat), GFP_KERNEL);
+       if (!plat)
+               return ERR_PTR(-ENOMEM);
+
+       of_property_read_u32(np, "debounce-interval", &plat->debounce_ms);
+       of_property_read_u32(np, "st,scan-count", &plat->scan_count);
+
+       plat->no_autorepeat = of_property_read_bool(np, "st,no-autorepeat");
+
+       return plat;
+}
+#else
+static inline const struct stmpe_keypad_platform_data *
+stmpe_keypad_of_probe(struct device *dev)
+{
+       return ERR_PTR(-EINVAL);
+}
+#endif
+
 static int stmpe_keypad_probe(struct platform_device *pdev)
 {
        struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent);
@@ -265,11 +310,13 @@ static int stmpe_keypad_probe(struct platform_device *pdev)
        struct input_dev *input;
        int error;
        int irq;
-       int i;
 
        plat = stmpe->pdata->keypad;
-       if (!plat)
-               return -ENODEV;
+       if (!plat) {
+               plat = stmpe_keypad_of_probe(&pdev->dev);
+               if (IS_ERR(plat))
+                       return PTR_ERR(plat);
+       }
 
        irq = platform_get_irq(pdev, 0);
        if (irq < 0)
@@ -299,12 +346,7 @@ static int stmpe_keypad_probe(struct platform_device *pdev)
        if (!plat->no_autorepeat)
                __set_bit(EV_REP, input->evbit);
 
-       for (i = 0; i < plat->keymap_data->keymap_size; i++) {
-               unsigned int key = plat->keymap_data->keymap[i];
-
-               keypad->cols |= 1 << KEY_COL(key);
-               keypad->rows |= 1 << KEY_ROW(key);
-       }
+       stmpe_keypad_fill_used_pins(keypad);
 
        keypad->stmpe = stmpe;
        keypad->plat = plat;