Input: matrix-keypad - switch to using generic device properties

Instead of being OF-specific, let's switch to using generic device
properties, which will make this code usable on ACPI, device tree and
legacy boards that use property sets.

As part of the change let's rename matrix_keypad_parse_of_params() to
matrix_keypad_parse_properties().

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

11 files changed, 70 insertions, 66 deletions

diff --git a/drivers/input/keyboard/bcm-keypad.c b/drivers/input/keyboard/bcm-keypad.c
index 2b4e63d81e6d9..e1cf63ee148f5 100644
--- a/drivers/input/keyboard/bcm-keypad.c
+++ b/drivers/input/keyboard/bcm-keypad.c
@@ -213,7 +213,7 @@ static int bcm_kp_matrix_key_parse_dt(struct bcm_kp *kp)
 	/* Initialize the KPCR Keypad Configuration Register */
 	kp->kpcr = KPCR_STATUSFILTERENABLE | KPCR_COLFILTERENABLE;
 
-	error = matrix_keypad_parse_of_params(dev, &kp->n_rows, &kp->n_cols);
+	error = matrix_keypad_parse_properties(dev, &kp->n_rows, &kp->n_cols);
 	if (error) {
 		dev_err(dev, "failed to parse kp params\n");
 		return error;
diff --git a/drivers/input/keyboard/cros_ec_keyb.c b/drivers/input/keyboard/cros_ec_keyb.c
index 87d071ae21da0..780977dcf92d2 100644
--- a/drivers/input/keyboard/cros_ec_keyb.c
+++ b/drivers/input/keyboard/cros_ec_keyb.c
@@ -229,7 +229,8 @@ static int cros_ec_keyb_probe(struct platform_device *pdev)
 	ckdev = devm_kzalloc(dev, sizeof(*ckdev), GFP_KERNEL);
 	if (!ckdev)
 		return -ENOMEM;
-	err = matrix_keypad_parse_of_params(dev, &ckdev->rows, &ckdev->cols);
+
+	err = matrix_keypad_parse_properties(dev, &ckdev->rows, &ckdev->cols);
 	if (err)
 		return err;
 
diff --git a/drivers/input/keyboard/lpc32xx-keys.c b/drivers/input/keyboard/lpc32xx-keys.c
index 632523d4f5dc1..1dd57ac0e7a27 100644
--- a/drivers/input/keyboard/lpc32xx-keys.c
+++ b/drivers/input/keyboard/lpc32xx-keys.c
@@ -145,7 +145,7 @@ static int lpc32xx_parse_dt(struct device *dev,
 	u32 rows = 0, columns = 0;
 	int err;
 
-	err = matrix_keypad_parse_of_params(dev, &rows, &columns);
+	err = matrix_keypad_parse_properties(dev, &rows, &columns);
 	if (err)
 		return err;
 	if (rows != columns) {
diff --git a/drivers/input/keyboard/omap4-keypad.c b/drivers/input/keyboard/omap4-keypad.c
index 9ecb16701b133..ebc67ba41fe24 100644
--- a/drivers/input/keyboard/omap4-keypad.c
+++ b/drivers/input/keyboard/omap4-keypad.c
@@ -223,8 +223,8 @@ static int omap4_keypad_parse_dt(struct device *dev,
 	struct device_node *np = dev->of_node;
 	int err;
 
-	err = matrix_keypad_parse_of_params(dev, &keypad_data->rows,
-					    &keypad_data->cols);
+	err = matrix_keypad_parse_properties(dev, &keypad_data->rows,
+					     &keypad_data->cols);
 	if (err)
 		return err;
 
diff --git a/drivers/input/keyboard/pmic8xxx-keypad.c b/drivers/input/keyboard/pmic8xxx-keypad.c
index 5c68e3f096bc8..97c5424f49b95 100644
--- a/drivers/input/keyboard/pmic8xxx-keypad.c
+++ b/drivers/input/keyboard/pmic8xxx-keypad.c
@@ -515,7 +515,7 @@ static int pmic8xxx_kp_probe(struct platform_device *pdev)
 	int rc;
 	unsigned int ctrl_val;
 
-	rc = matrix_keypad_parse_of_params(&pdev->dev, &rows, &cols);
+	rc = matrix_keypad_parse_properties(&pdev->dev, &rows, &cols);
 	if (rc)
 		return rc;
 
diff --git a/drivers/input/keyboard/pxa27x_keypad.c b/drivers/input/keyboard/pxa27x_keypad.c
index e24443376e756..3841fa30db334 100644
--- a/drivers/input/keyboard/pxa27x_keypad.c
+++ b/drivers/input/keyboard/pxa27x_keypad.c
@@ -126,7 +126,7 @@ static int pxa27x_keypad_matrix_key_parse_dt(struct pxa27x_keypad *keypad,
 	u32 rows, cols;
 	int error;
 
-	error = matrix_keypad_parse_of_params(dev, &rows, &cols);
+	error = matrix_keypad_parse_properties(dev, &rows, &cols);
 	if (error)
 		return error;
 
diff --git a/drivers/input/keyboard/st-keyscan.c b/drivers/input/keyboard/st-keyscan.c
index de7be4f03d919..babcfb165e4f0 100644
--- a/drivers/input/keyboard/st-keyscan.c
+++ b/drivers/input/keyboard/st-keyscan.c
@@ -106,8 +106,8 @@ static int keypad_matrix_key_parse_dt(struct st_keyscan *keypad_data)
 	struct device_node *np = dev->of_node;
 	int error;
 
-	error = matrix_keypad_parse_of_params(dev, &keypad_data->n_rows,
-					      &keypad_data->n_cols);
+	error = matrix_keypad_parse_properties(dev, &keypad_data->n_rows,
+					       &keypad_data->n_cols);
 	if (error) {
 		dev_err(dev, "failed to parse keypad params\n");
 		return error;
diff --git a/drivers/input/keyboard/stmpe-keypad.c b/drivers/input/keyboard/stmpe-keypad.c
index fe6e3f22eed76..8c6c0b9109c75 100644
--- a/drivers/input/keyboard/stmpe-keypad.c
+++ b/drivers/input/keyboard/stmpe-keypad.c
@@ -354,7 +354,7 @@ static int stmpe_keypad_probe(struct platform_device *pdev)
 	input->id.bustype = BUS_I2C;
 	input->dev.parent = &pdev->dev;
 
-	error = matrix_keypad_parse_of_params(&pdev->dev, &rows, &cols);
+	error = matrix_keypad_parse_properties(&pdev->dev, &rows, &cols);
 	if (error)
 		return error;
 
diff --git a/drivers/input/keyboard/tca8418_keypad.c b/drivers/input/keyboard/tca8418_keypad.c
index 9f6308fac0b46..ccff9d1b7135a 100644
--- a/drivers/input/keyboard/tca8418_keypad.c
+++ b/drivers/input/keyboard/tca8418_keypad.c
@@ -295,7 +295,7 @@ static int tca8418_keypad_probe(struct i2c_client *client,
 		struct device_node *np = dev->of_node;
 		int err;
 
-		err = matrix_keypad_parse_of_params(dev, &rows, &cols);
+		err = matrix_keypad_parse_properties(dev, &rows, &cols);
 		if (err)
 			return err;
 		rep = of_property_read_bool(np, "keypad,autorepeat");
diff --git a/drivers/input/keyboard/twl4030_keypad.c b/drivers/input/keyboard/twl4030_keypad.c
index 29396ca69416e..39e72b3219d8a 100644
--- a/drivers/input/keyboard/twl4030_keypad.c
+++ b/drivers/input/keyboard/twl4030_keypad.c
@@ -374,8 +374,8 @@ static int twl4030_kp_probe(struct platform_device *pdev)
 		kp->autorepeat = pdata->rep;
 		keymap_data = pdata->keymap_data;
 	} else {
-		error = matrix_keypad_parse_of_params(&pdev->dev, &kp->n_rows,
-						      &kp->n_cols);
+		error = matrix_keypad_parse_properties(&pdev->dev, &kp->n_rows,
+						       &kp->n_cols);
 		if (error)
 			return error;
 
diff --git a/drivers/input/matrix-keymap.c b/drivers/input/matrix-keymap.c
index 08b61f506db61..8ccefc15c7a4d 100644
--- a/drivers/input/matrix-keymap.c
+++ b/drivers/input/matrix-keymap.c
@@ -14,18 +14,18 @@
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- *
  */
 
 #include <linux/device.h>
+#include <linux/export.h>
 #include <linux/gfp.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
 #include <linux/input.h>
-#include <linux/of.h>
-#include <linux/export.h>
-#include <linux/module.h>
 #include <linux/input/matrix_keypad.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/slab.h>
+#include <linux/types.h>
 
 static bool matrix_keypad_map_key(struct input_dev *input_dev,
 				  unsigned int rows, unsigned int cols,
@@ -49,18 +49,22 @@ static bool matrix_keypad_map_key(struct input_dev *input_dev,
 	return true;
 }
 
-#ifdef CONFIG_OF
-int matrix_keypad_parse_of_params(struct device *dev,
-				  unsigned int *rows, unsigned int *cols)
+/**
+ * matrix_keypad_parse_properties() - Read properties of matrix keypad
+ *
+ * @dev: Device containing properties
+ * @rows: Returns number of matrix rows
+ * @cols: Returns number of matrix columns
+ * @return 0 if OK, <0 on error
+ */
+int matrix_keypad_parse_properties(struct device *dev,
+				   unsigned int *rows, unsigned int *cols)
 {
-	struct device_node *np = dev->of_node;
+	*rows = *cols = 0;
+
+	device_property_read_u32(dev, "keypad,num-rows", rows);
+	device_property_read_u32(dev, "keypad,num-columns", cols);
 
-	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;
@@ -68,62 +72,61 @@ int matrix_keypad_parse_of_params(struct device *dev,
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(matrix_keypad_parse_of_params);
+EXPORT_SYMBOL_GPL(matrix_keypad_parse_properties);
 
-static int matrix_keypad_parse_of_keymap(const char *propname,
-					 unsigned int rows, unsigned int cols,
-					 struct input_dev *input_dev)
+static int matrix_keypad_parse_keymap(const char *propname,
+				      unsigned int rows, unsigned int cols,
+				      struct input_dev *input_dev)
 {
 	struct device *dev = input_dev->dev.parent;
-	struct device_node *np = dev->of_node;
 	unsigned int row_shift = get_count_order(cols);
 	unsigned int max_keys = rows << row_shift;
-	unsigned int proplen, i, size;
-	const __be32 *prop;
-
-	if (!np)
-		return -ENOENT;
+	u32 *keys;
+	int i;
+	int size;
+	int retval;
 
 	if (!propname)
 		propname = "linux,keymap";
 
-	prop = of_get_property(np, propname, &proplen);
-	if (!prop) {
-		dev_err(dev, "OF: %s property not defined in %s\n",
-			propname, np->full_name);
-		return -ENOENT;
+	size = device_property_read_u32_array(dev, propname, NULL, 0);
+	if (size <= 0) {
+		dev_err(dev, "missing or malformed property %s: %d\n",
+			propname, size);
+		return size < 0 ? size : -EINVAL;
 	}
 
-	if (proplen % sizeof(u32)) {
-		dev_err(dev, "OF: Malformed keycode property %s in %s\n",
-			propname, np->full_name);
+	if (size > max_keys) {
+		dev_err(dev, "%s size overflow (%d vs max %u)\n",
+			propname, size, max_keys);
 		return -EINVAL;
 	}
 
-	size = proplen / sizeof(u32);
-	if (size > max_keys) {
-		dev_err(dev, "OF: %s size overflow\n", propname);
-		return -EINVAL;
+	keys = kmalloc_array(size, sizeof(u32), GFP_KERNEL);
+	if (!keys)
+		return -ENOMEM;
+
+	retval = device_property_read_u32_array(dev, propname, keys, size);
+	if (retval) {
+		dev_err(dev, "failed to read %s property: %d\n",
+			propname, retval);
+		goto out;
 	}
 
 	for (i = 0; i < size; i++) {
-		unsigned int key = be32_to_cpup(prop + i);
-
 		if (!matrix_keypad_map_key(input_dev, rows, cols,
-					   row_shift, key))
-			return -EINVAL;
+					   row_shift, keys[i])) {
+			retval = -EINVAL;
+			goto out;
+		}
 	}
 
-	return 0;
-}
-#else
-static int matrix_keypad_parse_of_keymap(const char *propname,
-					 unsigned int rows, unsigned int cols,
-					 struct input_dev *input_dev)
-{
-	return -ENOSYS;
+	retval = 0;
+
+out:
+	kfree(keys);
+	return retval;
 }
-#endif
 
 /**
  * matrix_keypad_build_keymap - convert platform keymap into matrix keymap
@@ -192,8 +195,8 @@ int matrix_keypad_build_keymap(const struct matrix_keymap_data *keymap_data,
 				return -EINVAL;
 		}
 	} else {
-		error = matrix_keypad_parse_of_keymap(keymap_name, rows, cols,
-						      input_dev);
+		error = matrix_keypad_parse_keymap(keymap_name, rows, cols,
+						   input_dev);
 		if (error)
 			return error;
 	}