From mboxrd@z Thu Jan 1 00:00:00 1970 From: clabbe.montjoie@gmail.com (LABBE Corentin) Date: Wed, 20 Jul 2016 10:03:18 +0200 Subject: [PATCH v2 3/5] ARM: sun8i: dt: Add DT bindings documentation for Allwinner sun8i-emac In-Reply-To: <1469001800-11615-1-git-send-email-clabbe.montjoie@gmail.com> References: <1469001800-11615-1-git-send-email-clabbe.montjoie@gmail.com> Message-ID: <1469001800-11615-4-git-send-email-clabbe.montjoie@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org This patch adds documentation for Device-Tree bindings for the Allwinner sun8i-emac driver. Signed-off-by: LABBE Corentin --- .../bindings/net/allwinner,sun8i-emac.txt | 65 ++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/allwinner,sun8i-emac.txt diff --git a/Documentation/devicetree/bindings/net/allwinner,sun8i-emac.txt b/Documentation/devicetree/bindings/net/allwinner,sun8i-emac.txt new file mode 100644 index 0000000..4bf4e53 --- /dev/null +++ b/Documentation/devicetree/bindings/net/allwinner,sun8i-emac.txt @@ -0,0 +1,65 @@ +* Allwinner sun8i EMAC ethernet controller + +Required properties: +- compatible: "allwinner,sun8i-a83t-emac", "allwinner,sun8i-h3-emac", + or "allwinner,sun50i-a64-emac" +- reg: address and length of the register sets for the device. +- reg-names: should be "emac" and "syscon", matching the register sets +- interrupts: interrupt for the device +- clocks: A phandle to the reference clock for this device +- clock-names: should be "ahb" +- resets: A phandle to the reset control for this device +- reset-names: should be "ahb" +- phy-mode: See ethernet.txt +- phy or phy-handle: See ethernet.txt +- #address-cells: shall be 1 +- #size-cells: shall be 0 + +"allwinner,sun8i-h3-emac" also requires: +- clocks: an extra phandle to the reference clock for the EPHY +- clock-names: an extra "ephy" entry matching the clocks property +- resets: an extra phandle to the reset control for the EPHY +- resets-names: an extra "ephy" entry matching the resets property + +See ethernet.txt in the same directory for generic bindings for ethernet +controllers. + +The device node referenced by "phy" or "phy-handle" should be a child node +of this node. See phy.txt for the generic PHY bindings. + +Optional properties: +- phy-supply: phandle to a regulator if the PHY needs one +- phy-io-supply: phandle to a regulator if the PHY needs a another one for I/O. + This is sometimes found with RGMII PHYs, which use a second + regulator for the lower I/O voltage. +- allwinner,tx-delay: The setting of the TX clock delay chain +- allwinner,rx-delay: The setting of the RX clock delay chain + +The TX/RX clock delay chain settings are board specific. + +Optional properties for "allwinner,sun8i-h3-emac": +- allwinner,use-internal-phy: Use the H3 SoC's internal E(thernet) PHY +- allwinner,leds-active-low: EPHY LEDs are active low + +When the internal PHY is requested, the implementation shall configure the +internal PHY to use the address specified in the child PHY node. + +Example: + +emac: ethernet at 01c0b000 { + compatible = "allwinner,sun8i-h3-emac"; + reg = <0x01c0b000 0x104>, <0x01c00030 0x4>; + reg-names = "emac", "syscon"; + interrupts = ; + clocks = <&bus_gates 17>, <&bus_gates 128>; + clock-names = "ahb", "ephy"; + resets = <&ahb_rst 17>, <&ahb_rst 66>; + reset-names = "ahb", "ephy"; + phy = <&phy1>; + allwinner,use-internal-phy; + allwinner,leds-active-low; + + phy1: ethernet-phy at 1 { + reg = <1>; + }; +}; -- 2.7.3