From: Kamlakant Patel <kamlakant.patel@xxxxxxxxxxxx>
Provide documentation for Netlogic XLP SoCs GPIO controller DTS bindings.
Signed-off-by: Kamlakant Patel <kamlakant.patel@xxxxxxxxxxxx>
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.../devicetree/bindings/gpio/gpio-xlp.txt | 47 ++++++++++++++++++++
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diff --git a/Documentation/devicetree/bindings/gpio/gpio-xlp.txt b/Documentation/devicetree/bindings/gpio/gpio-xlp.txt
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index 0000000..262ee4d
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+Netlogic XLP Family GPIO
+========================
+
+This GPIO driver is used for following Netlogic XLP SoCs:
+ XLP832, XLP316, XLP208, XLP980, XLP532
+
+Required properties:
+-------------------
+
+- compatible: Should be one of the following:
+ - "netlogic,xlp832-gpio": For Netlogic XLP832
+ - "netlogic,xlp316-gpio": For Netlogic XLP316
+ - "netlogic,xlp208-gpio": For Netlogic XLP208
+ - "netlogic,xlp980-gpio": For Netlogic XLP980
+ - "netlogic,xlp532-gpio": For Netlogic XLP532
+- reg: Physical base address and length of the controller's registers.
+- #gpio-cells: Should be two. The first cell is the pin number and the second
+ cell is used to specify optional parameters (currently unused).
+- gpio-controller: Marks the device node as a GPIO controller.
+- nr-gpios: Number of GPIO pins supported by the controller.
+- interrupt-cells: Should be two. The first cell is the GPIO Number. The
+ second cell is used to specify flags. The following subset of flags is
+ supported:
+ - trigger type:
+ 1 = low to high edge triggered.
+ 2 = high to low edge triggered.
+ 4 = active high level-sensitive.
+ 8 = active low level-sensitive.
+- interrupts: Interrupt number for this device.
+- interrupt-parent: phandle of the parent interrupt controller.
+- interrupt-controller: Identifies the node as an interrupt controller.
+
+Example:
+
+ gpio: xlp_gpio@34000 {
+ compatible = "netlogic,xlp316-gpio";
+ reg = <0 0x34100 0x1000
+ 0 0x35100 0x1000>;
+ #gpio-cells = <2>;
+ gpio-controller;
+ nr-gpios = <57>;
+
+ #interrupt-cells = <2>;
+ interrupt-parent = <&pic>;
+ interrupts = <39>;
+ interrupt-controller;
+ };
--
1.7.1
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