From mboxrd@z Thu Jan 1 00:00:00 1970 From: linus.walleij@linaro.org (Linus Walleij) Date: Sat, 20 May 2017 01:05:58 +0200 Subject: [PATCH 2/4 v2] ata: Add DT bindings for the Gemini SATA bridge In-Reply-To: <20170519230600.16782-1-linus.walleij@linaro.org> References: <20170519230600.16782-1-linus.walleij@linaro.org> Message-ID: <20170519230600.16782-2-linus.walleij@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org This adds device tree bindings for the Cortina Systems Gemini PATA to SATA bridge. Cc: devicetree at vger.kernel.org Cc: John Feng-Hsin Chiang Cc: Greentime Hu Acked-by: Hans Ulli Kroll Acked-by: Rob Herring Signed-off-by: Linus Walleij --- ChangeLog v1->v2: - Fix ata0 misspelled as ata1 in one place. --- .../bindings/ata/cortina,gemini-sata-bridge.txt | 55 ++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 Documentation/devicetree/bindings/ata/cortina,gemini-sata-bridge.txt diff --git a/Documentation/devicetree/bindings/ata/cortina,gemini-sata-bridge.txt b/Documentation/devicetree/bindings/ata/cortina,gemini-sata-bridge.txt new file mode 100644 index 000000000000..1c3d3cc70051 --- /dev/null +++ b/Documentation/devicetree/bindings/ata/cortina,gemini-sata-bridge.txt @@ -0,0 +1,55 @@ +* Cortina Systems Gemini SATA Bridge + +The Gemini SATA bridge in a SoC-internal PATA to SATA bridge that +takes two Faraday Technology FTIDE010 PATA controllers and bridges +them in different configurations to two SATA ports. + +Required properties: +- compatible: should be + "cortina,gemini-sata-bridge" +- reg: registers and size for the block +- resets: phandles to the reset lines for both SATA bridges +- reset-names: must be "sata0", "sata1" +- clocks: phandles to the compulsory peripheral clocks +- clock-names: must be "SATA0_PCLK", "SATA1_PCLK" +- syscon: a phandle to the global Gemini system controller +- cortina,gemini-ata-muxmode: tell the desired multiplexing mode for + the ATA controller and SATA bridges. Values 0..3: + Mode 0: ata0 master <-> sata0 + ata1 master <-> sata1 + ata0 slave interface brought out on IDE pads + Mode 1: ata0 master <-> sata0 + ata1 master <-> sata1 + ata1 slave interface brought out on IDE pads + Mode 2: ata1 master <-> sata1 + ata1 slave <-> sata0 + ata0 master and slave interfaces brought out + on IDE pads + Mode 3: ata0 master <-> sata0 + ata0 slave <-> sata1 + ata1 master and slave interfaces brought out + on IDE pads + +Optional boolean properties: +- cortina,gemini-enable-ide-pins: enables the PATA to IDE connection. + The muxmode setting decides whether ATA0 or ATA1 is brought out, + and whether master, slave or both interfaces get brought out. +- cortina,gemini-enable-sata-bridge: enables the PATA to SATA bridge + inside the Gemnini SoC. The Muxmode decides what PATA blocks will + be muxed out and how. + +Example: + +sata: sata at 46000000 { + compatible = "cortina,gemini-sata-bridge"; + reg = <0x46000000 0x100>; + resets = <&rcon 26>, <&rcon 27>; + reset-names = "sata0", "sata1"; + clocks = <&gcc GEMINI_CLK_GATE_SATA0>, + <&gcc GEMINI_CLK_GATE_SATA1>; + clock-names = "SATA0_PCLK", "SATA1_PCLK"; + syscon = <&syscon>; + cortina,gemini-ata-muxmode = <3>; + cortina,gemini-enable-ide-pins; + cortina,gemini-enable-sata-bridge; +}; -- 2.9.4