From 5318f18d2c002f505054b90bb95ba7c53532eedf Mon Sep 17 00:00:00 2001 From: Gabriel Huau Date: Mon, 25 May 2015 22:27:37 -0700 Subject: x86: gpio: add pinctrl support from the device tree Every pin can be configured now from the device tree. A dt-bindings has been added to describe the different property available. Change-Id: I1668886062655f83700d0e7bbbe3ad09b19ee975 Signed-off-by: Gabriel Huau Acked-by: Simon Glass --- .../gpio/intel,x86-pinctrl.txt | 31 ++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 doc/device-tree-bindings/gpio/intel,x86-pinctrl.txt (limited to 'doc/device-tree-bindings/gpio') diff --git a/doc/device-tree-bindings/gpio/intel,x86-pinctrl.txt b/doc/device-tree-bindings/gpio/intel,x86-pinctrl.txt new file mode 100644 index 0000000000..45ab1afc39 --- /dev/null +++ b/doc/device-tree-bindings/gpio/intel,x86-pinctrl.txt @@ -0,0 +1,31 @@ +Intel x86 PINCTRL/GPIO controller + +Pin-muxing on x86 can be described with a node for the PINCTRL master +node and a set of child nodes for each pin on the SoC. + +The PINCTRL master node requires the following properties: +- compatible : "intel,x86-pinctrl" + +Pin nodes must be children of the pinctrl master node and can +contain the following properties: +- pad-offset - (required) offset in the IOBASE for the pin to configured. +- gpio-offset - (required) offset in the GPIOBASE for the pin to configured and + also the bit shift in this register. +- mode-gpio - (optional) standalone property to force the pin into GPIO mode. +- mode-func - (optional) function number to assign to the pin. if 'mode-gpio' + is set, this property will be ignored. +in case of 'mode-gpio' property set: +- output-value - (optional) this set the default output value of the GPIO. +- direction - (optional) this set the direction of the gpio. +- pull-str - (optional) this set the pull strength of the pin. +- pull-assign - (optional) this set the pull assignement (up/down) of the pin. + +Example: + +pin_usb_host_en0@0 { + gpio-offset = <0x80 8>; + pad-offset = <0x260>; + mode-gpio; + output-value = <1>; + direction = ; +}; -- cgit v1.2.1