diff options
Diffstat (limited to 'Documentation/devicetree/bindings/gpio')
| -rw-r--r-- | Documentation/devicetree/bindings/gpio/gpio-imx-rpmsg.txt | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio-imx-rpmsg.txt b/Documentation/devicetree/bindings/gpio/gpio-imx-rpmsg.txt new file mode 100644 index 000000000000..49c7d321e2bf --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-imx-rpmsg.txt @@ -0,0 +1,38 @@ +Device-Tree bindings for drivers/gpio/gpio-imx-rpmsg.c gpio driver over +rpmsg. On i.mx7ULP PTA PTB are connected on M4 side, so rpmsg gpio driver +needed to get/set gpio status from M4 side by rpmsg. + +Required properties: +- compatible : Should be "fsl,imx-rpmsg-gpio". +- port_idx : Specify the GPIO PORT index, PTA:0, PTB:1. +- gpio-controller : Mark the device node as a gpio controller. +- #gpio-cells : Should be two. The first cell is the pin number and + the second cell is used to specify the gpio polarity: + 0 = active high + 1 = active low + +Note: Each GPIO port should have an alias correctly numbered in "aliases" +node. + +Examples: + +aliases { + gpio4 = &rpmsg_gpio0; + gpio5 = &rpmsg_gpio1; +}; + +rpmsg_gpio0: rpmsg-gpio0 { + compatible = "fsl,imx-rpmsg-gpio"; + port_idx = <0>; + gpio-controller; + #gpio-cells = <2>; + status = "okay"; +}; + +rpmsg_gpio1: rpmsg-gpio1 { + compatible = "fsl,imx-rpmsg-gpio"; + port_idx = <1>; + gpio-controller; + #gpio-cells = <2>; + status = "okay"; +}; |