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Date: Wed, 29 Mar 2017 18:04:19 +0200 From: Boris Brezillon <boris.brezillon@...e-electrons.com> To: Linus Walleij <linus.walleij@...aro.org>, Alexandre Courbot <gnurou@...il.com>, linux-gpio@...r.kernel.org Cc: linux-kernel@...r.kernel.org, Simon Hatliff <hatliff@...ence.com>, Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>, Boris Brezillon <boris.brezillon@...e-electrons.com> Subject: [PATCH 2/2] dt-bindings: gpio: Document Cadence GPIO controller bindings Document Cadence GPIO bindings. Signed-off-by: Boris Brezillon <boris.brezillon@...e-electrons.com> --- .../devicetree/bindings/gpio/cdns,gpio.txt | 41 ++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/cdns,gpio.txt diff --git a/Documentation/devicetree/bindings/gpio/cdns,gpio.txt b/Documentation/devicetree/bindings/gpio/cdns,gpio.txt new file mode 100644 index 000000000000..09fb2c8e5c9d --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/cdns,gpio.txt @@ -0,0 +1,41 @@ +Cadence GPIO controller bindings + +Required properties: +- compatible: should be "cdns,gpio-r1p02". +- reg: the register base address and size. +- #gpio-cells: should be 2. + * first cell is the GPIO number. + * second cell specifies the GPIO flags, as defined in + <dt-bindings/gpio/gpio.h>. Only the GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW + flags are supported. +- gpio-controller: marks the device as a GPIO controller. +- clocks: should contain one entry referencing the peripheral clock driving the + GPIO controller. + +Optional properties: +- interrupt-parent: phandle of the parent interrupt controller. +- interrupts: interrupt specifier for the controllers interrupt. +- interrupt-controller: marks the device as an interrupt controller. When + defined, interrupts, interrupt-parent and #interrupt-cells are required. +- interrupt-cells: should be 2. + * first cell is the GPIO number you want to use as an IRQ source. + * second cell specifies the IRQ type, as defined in + <dt-bindings/interrupt-controller/irq.h>. + +Example: + + gpio-controller@...0000 { + compatible = "cdns,gpio"; + reg = <0xd050000 0x10000>; + + clocks = <&gpio_pclk>; + + interrupt-parent = <&intc>; + interrupts = <4 IRQ_TYPE_LEVEL_HIGH>; + + gpio-controller; + #gpio-cells = <2>; + + interrupt-controller; + #interrupt-cells = <2>; + }; -- 2.7.4
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