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gpio: Add Netlogic XLP GPIO devicetree bindings documentation

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Provide documentation for Netlogic XLP SoCs GPIO controller DTS bindings.

Signed-off-by: Kamlakant Patel <kamlakant.patel@broadcom.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Kamlakant Patel 2015-04-28 20:10:44 +05:30 committed by Linus Walleij
parent cac089f902
commit a605c668cc
1 changed files with 47 additions and 0 deletions
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Documentation/devicetree/bindings/gpio/gpio-xlp.txt Normal file
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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;
};