pinctrl: cygnus: Optional DT property to support pin mappings
If GPIO controller's pins are muxed, pin-controller subsystem
need to be intimated by defining mapping between gpio and
pinmux controller. This patch adds required properties to
define this mapping via DT.
Signed-off-by: Pramod Kumar <pramodku@broadcom.com>
Reviewed-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt
index 6540ca5..25a5002 100644
--- a/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt
+++ b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt
@@ -26,9 +26,13 @@
- interrupt-controller:
Specifies that the node is an interrupt controller
-- pinmux:
- Specifies the phandle to the IOMUX device, where pins can be individually
-muxed to GPIO
+- gpio-ranges:
+ Specifies the mapping between gpio controller and pin-controllers pins.
+ This requires 4 fields in cells defined as -
+ 1. Phandle of pin-controller.
+ 2. GPIO base pin offset.
+ 3 Pin-control base pin offset.
+ 4. number of gpio pins which are linearly mapped from pin base.
Supported generic PINCONF properties in child nodes:
@@ -78,6 +82,8 @@
gpio-controller;
interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
interrupt-controller;
+ gpio-ranges = <&pinctrl 0 42 1>,
+ <&pinctrl 1 44 3>;
};
/*