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received-spf: None (protection.outlook.com: sifive.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: d8zBPPRrEzdargIbduXTMNZmArqmUaV7eLwlrfA+FguVqBMxoojN4zUqbVxyJZwfERFlDu7B6inOk268JeCxiShCZn14zllDX0yQYnbj3DdZZ69oXvdHWGepfBz8QSF2Jc/Zkyk1VinbwMe5xRxRINaxbbcZmaDZSt8WIDc9fV5ZFDsBZ9qmRe2r2SPvKy0Eowl4pOvk3VWo5JU8QKE2p1H53Ml3GB4Mo6/eNQNRp7uWNUXfmFqeh/EbxaeYpw7VRIBbhp4wG4QRtDJrYse0ZPJ18aDLxDjf13WZS4a/RxuZPBfl9YmTyPi6nvNZh2KZMX4os4Mar7E3GVC/41lzKDfXg9RpSchhDeGAQre9xVZ3Myl/Ms5mkFnjWwAUgOiYLgoUng86zhmjUMqlNd0xQz5yWqB3giX3F7aKWHnUpRzgYSqVncamDAV+UgdqWxjr Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: sifive.com X-MS-Exchange-CrossTenant-Network-Message-Id: 521c19bb-e2b3-4fde-f985-08d7676988d3 X-MS-Exchange-CrossTenant-originalarrivaltime: 12 Nov 2019 12:12:06.3683 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 22f88e9d-ae0d-4ed9-b984-cdc9be1529f1 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: Vn7qWNhCF6sU4HBQkrW/HYXHhZZmvsKKy4Rshm9O1cF4knmQIhYbW7e7JxlqLrbEL4m9eDmnLxUVDSi99SQXfg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR13MB3541 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org DT documentation for GPIO controller added. Signed-off-by: Wesley W. Terpstra [Atish: Compatible string update] Signed-off-by: Atish Patra Signed-off-by: Yash Shah --- .../devicetree/bindings/gpio/gpio-sifive.txt | 33 ++++++++++++++++++= ++++ 1 file changed, 33 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-sifive.txt diff --git a/Documentation/devicetree/bindings/gpio/gpio-sifive.txt b/Docum= entation/devicetree/bindings/gpio/gpio-sifive.txt new file mode 100644 index 0000000..d3416d5 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-sifive.txt @@ -0,0 +1,33 @@ +SiFive GPIO controller bindings + +Required properties: +- compatible: Should be "sifive,-gpio" and "sifive,gpio". + Supported compatible strings are: "sifive,fu540-c000-gpio" for the SiFiv= e + GPIO v0 as integrated onto the SiFive FU540 chip, and "sifive,gpio0" for= the + SiFive GPIO v0 IP block with no chip integration tweaks. + Please refer to sifive-blocks-ip-versioning.txt for details. +- reg: Physical base address and length of the controller's registers. +- clocks: Should contain a clock identifier for the GPIO's parent clock. +- #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 =3D "sifive,fu540-c000-gpio","sifive,gpio0"; + interrupt-parent =3D <&plic>; + interrupts =3D <7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22>; + reg =3D <0x0 0x10060000 0x0 0x1000>; + clocks =3D <&tlclk>; + gpio-controller; + #gpio-cells =3D <2>; + interrupt-controller; + #interrupt-cells =3D <2>; +}; --=20 2.7.4