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author | Sascha Hauer <s.hauer@pengutronix.de> | 2017-11-28 11:02:14 +0100 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2017-11-28 11:06:44 +0100 |
commit | 2e9cce8fb1f577088e2b20ae2f461130e13ad190 (patch) | |
tree | f82ae53e88d36e07608be1b3159da296ed025ef1 /dts/Bindings/media/cec-gpio.txt | |
parent | c68d466d263827692aa809e6b34abb90a1cab515 (diff) | |
download | barebox-2e9cce8fb1f577088e2b20ae2f461130e13ad190.tar.gz barebox-2e9cce8fb1f577088e2b20ae2f461130e13ad190.tar.xz |
dts: update to v4.15-rc1
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'dts/Bindings/media/cec-gpio.txt')
-rw-r--r-- | dts/Bindings/media/cec-gpio.txt | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/dts/Bindings/media/cec-gpio.txt b/dts/Bindings/media/cec-gpio.txt new file mode 100644 index 0000000000..46a0bac8b3 --- /dev/null +++ b/dts/Bindings/media/cec-gpio.txt @@ -0,0 +1,32 @@ +* HDMI CEC GPIO driver + +The HDMI CEC GPIO module supports CEC implementations where the CEC line +is hooked up to a pull-up GPIO line and - optionally - the HPD line is +hooked up to another GPIO line. + +Required properties: + - compatible: value must be "cec-gpio". + - cec-gpios: gpio that the CEC line is connected to. The line should be + tagged as open drain. + +If the CEC line is associated with an HDMI receiver/transmitter, then the +following property is also required: + + - hdmi-phandle - phandle to the HDMI controller, see also cec.txt. + +If the CEC line is not associated with an HDMI receiver/transmitter, then +the following property is optional: + + - hpd-gpios: gpio that the HPD line is connected to. + +Example for the Raspberry Pi 3 where the CEC line is connected to +pin 26 aka BCM7 aka CE1 on the GPIO pin header and the HPD line is +connected to pin 11 aka BCM17: + +#include <dt-bindings/gpio/gpio.h> + +cec-gpio { + compatible = "cec-gpio"; + cec-gpios = <&gpio 7 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>; + hpd-gpios = <&gpio 17 GPIO_ACTIVE_HIGH>; +}; |