gpio: pca953x: add compatibility for pcal6524 and pcal9555a

The Pyra-Handheld originally used the tca6424 but recently we have
replaced it by the pin and package compatible pcal6524. So let's
add this to the bindings and the driver.

And while we are at it, the pcal9555a does not have a compatible entry
either but is already supported by the device id table.

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Documentation/devicetree/bindings/gpio/gpio-pca953x.txt

@@ -16,6 +16,8 @@ Required properties:
 	nxp,pca9574
 	nxp,pca9575
 	nxp,pca9698
+	nxp,pcal6524
+	nxp,pcal9555a
 	maxim,max7310
 	maxim,max7312
 	maxim,max7313

drivers/gpio/gpio-pca953x.c

@@ -70,6 +70,7 @@ static const struct i2c_device_id pca953x_id[] = {
 	{ "pca9575", 16 | PCA957X_TYPE | PCA_INT, },
 	{ "pca9698", 40 | PCA953X_TYPE, },
 
+	{ "pcal6524", 24 | PCA953X_TYPE | PCA_INT | PCA_PCAL, },
 	{ "pcal9555a", 16 | PCA953X_TYPE | PCA_INT | PCA_PCAL, },
 
 	{ "max7310", 8  | PCA953X_TYPE, },
@@ -935,6 +936,9 @@ static const struct of_device_id pca953x_dt_ids[] = {
 	{ .compatible = "nxp,pca9575", .data = OF_957X(16, PCA_INT), },
 	{ .compatible = "nxp,pca9698", .data = OF_953X(40, 0), },
 
+	{ .compatible = "nxp,pcal6524", .data = OF_953X(24, PCA_INT), },
+	{ .compatible = "nxp,pcal9555a", .data = OF_953X(16, PCA_INT), },
+
 	{ .compatible = "maxim,max7310", .data = OF_953X( 8, 0), },
 	{ .compatible = "maxim,max7312", .data = OF_953X(16, PCA_INT), },
 	{ .compatible = "maxim,max7313", .data = OF_953X(16, PCA_INT), },