Adds "ngpios" and "gpio-ranges" bindings definition.
Signed-off-by: Alexandre TORGUE <alexandre.torgue@xxxxxx>
diff --git a/Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.txt
index b24583a..25d9809 100644
--- a/Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.txt
+++ b/Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.txt
@@ -37,8 +37,23 @@ Optional properties:
- st,syscfg: Should be phandle/offset pair. The phandle to the syscon node
which includes IRQ mux selection register, and the offset of the IRQ mux
selection register.
+ - ngpios: Number of gpios in a bank (to use if bank gpio numbers is less
+ than 16).
+ - gpio-ranges: Define a dedicated mapping between a pin-controller and
+ a gpio controller. Format is <&phandle a b c> with:
+ -(phandle): phandle of pin-controller.
+ -(a): gpio base offset in range.
+ -(b): pin base offset in range.
+ -(c): gpio count in range
+ This entry has to be used either if there are holes inside a bank:
+ GPIOB0/B1/B2/B14/B15 (see example 2)
+ or if banks are not contiguous:
+ GPIOA/B/C/E...
+ NOTE: If "gpio-ranges" is used for a gpio controller, all gpio-controller
+ have to use a "gpio-ranges" entry.
+ More details in Documentation/devicetree/bindings/gpio/gpio.txt.
-Example:
+Example 1:
#include <dt-bindings/pinctrl/stm32f429-pinfunc.h>
...
@@ -60,6 +75,43 @@ Example:
pin-functions nodes follow...
};
+Example 2:
+#include <dt-bindings/pinctrl/stm32f429-pinfunc.h>
+...
+
+ pinctrl: pin-controller {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "st,stm32f429-pinctrl";
+ ranges = <0 0x40020000 0x3000>;
+ pins-are-numbered;
+
+ gpioa: gpio@40020000 {
+ gpio-controller;
+ #gpio-cells = <2>;
+ reg = <0x0 0x400>;
+ resets = <&reset_ahb1 0>;
+ st,bank-name = "GPIOA";
+ gpio-ranges = <&pinctrl 0 0 16>;
+ };
+
+ gpiob: gpio@40020400 {
+ gpio-controller;
+ #gpio-cells = <2>;
+ reg = <0x0 0x400>;
+ resets = <&reset_ahb1 0>;
+ st,bank-name = "GPIOB";
+ ngpios = 4;
+ gpio-ranges = <&pinctrl 0 16 3>,
+ <&pinctrl 14 30 2>;
+ };
+
+
+ ...
+ pin-functions nodes follow...
+ };
+
+
Contents of function subnode node:
----------------------------------
Subnode format
--
1.9.1
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