From mboxrd@z Thu Jan 1 00:00:00 1970 From: Atish Patra Subject: [RFC 3/4] gpio: sifive: Add DT documentation for SiFive GPIO. Date: Tue, 9 Oct 2018 11:51:24 -0700 Message-ID: <1539111085-25502-4-git-send-email-atish.patra@wdc.com> References: <1539111085-25502-1-git-send-email-atish.patra@wdc.com> Return-path: In-Reply-To: <1539111085-25502-1-git-send-email-atish.patra@wdc.com> Sender: linux-kernel-owner@vger.kernel.org To: palmer@sifive.com, linux-riscv@lists.infradead.org, linux-pwm@vger.kernel.org, linux-gpio@vger.kernel.org Cc: linus.walleij@linaro.org, robh+dt@kernel.org, thierry.reding@gmail.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, mark.rutland@arm.com, hch@infradead.org, atish.patra@wdc.com List-Id: devicetree@vger.kernel.org From: "Wesley W. Terpstra" DT documentation for GPIO added with updated compatible string. Signed-off-by: Wesley W. Terpstra [Atish: Compatible string update] Signed-off-by: Atish Patra --- .../devicetree/bindings/gpio/gpio-sifive.txt | 28 ++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-sifive.txt diff --git a/Documentation/devicetree/bindings/gpio/gpio-sifive.txt b/Documentation/devicetree/bindings/gpio/gpio-sifive.txt new file mode 100644 index 00000000..781fe4ad --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-sifive.txt @@ -0,0 +1,28 @@ +SiFive GPIO controller bindings + +Required properties: +- compatible: should be one of + "sifive,fu540-c000-gpio0","sifive,gpio0" +- reg: Physical base address and length of the controller's registers. +- #gpio-cells : Should be 2 + - The first cell is the GPIO offset number. + - The second cell indicates the polarity of the GPIO +- gpio-controller : Marks the device node as a GPIO controller. +- interrupt-controller: Marks the device node as an interrupt controller. +- #interrupt-cells : Should be 2. + - The first cell is the GPIO offset number within the GPIO controller. + - The second cell is the edge/level to use for interrupt generation. +- interrupts: Specify the interrupts, one per GPIO + +Example: + +gpio: gpio@10060000 { + compatible = "sifive,fu540-c000-gpio0","sifive,gpio0"; + interrupt-parent = <&plic>; + interrupts = <7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22>; + reg = <0x0 0x10060000 0x0 0x1000>; + gpio-controller; + #gpio-cells = <2>; + interrupt-controller; + #interrupt-cells = <2>; +}; -- 2.7.4