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[86.49.110.70]) by smtp.gmail.com with ESMTPSA id d4sm13811001wrp.89.2018.12.04.18.04.28 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 04 Dec 2018 18:04:28 -0800 (PST) Subject: Re: [PATCH v2 2/2] dt-binding: spi: Document Renesas R-Car Gen3 RPC controller bindings To: Mason Yang , broonie@kernel.org, linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, boris.brezillon@bootlin.com, linux-renesas-soc@vger.kernel.org, Geert Uytterhoeven Cc: juliensu@mxic.com.tw, Simon Horman , zhengxunli@mxic.com.tw References: <1543828720-18345-1-git-send-email-masonccyang@mxic.com.tw> <1543828720-18345-3-git-send-email-masonccyang@mxic.com.tw> From: Marek Vasut Message-ID: <2e719883-4cfd-b456-b894-853e99515092@gmail.com> Date: Tue, 4 Dec 2018 19:19:48 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 MIME-Version: 1.0 In-Reply-To: <1543828720-18345-3-git-send-email-masonccyang@mxic.com.tw> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/03/2018 10:18 AM, Mason Yang wrote: > Document the bindings used by the Renesas R-Car Gen3 RPC SPI controller. RPC is SPI and HF controller, it is not a pure SPI controller. How does this deal with the HF part ? Keep in mind the bindings are ABI and it will be difficult to redo them later. > Signed-off-by: Mason Yang > --- > .../devicetree/bindings/spi/spi-renesas-rpc.txt | 35 ++++++++++++++++++++++ > 1 file changed, 35 insertions(+) > create mode 100644 Documentation/devicetree/bindings/spi/spi-renesas-rpc.txt > > diff --git a/Documentation/devicetree/bindings/spi/spi-renesas-rpc.txt b/Documentation/devicetree/bindings/spi/spi-renesas-rpc.txt > new file mode 100644 > index 0000000..c6c6d9c > --- /dev/null > +++ b/Documentation/devicetree/bindings/spi/spi-renesas-rpc.txt > @@ -0,0 +1,35 @@ > +Renesas R-Car Gen3 RPC controller Device Tree Bindings > +------------------------------------------------------ > + > +Required properties: > +- compatible: should be "renesas,r8a77995-rpc" > +- #address-cells: should be 1 > +- #size-cells: should be 0 > +- reg: should contain 2 entries, one for the registers and one for the direct > + mapping area > +- reg-names: should contain "rpc_regs" and "dirmap" > +- interrupts: interrupt line connected to the RPC SPI controller Not a SPI controller. > +- clock-names: should contain "clk_rpc" > +- clocks: should contain 1 entries for the module's clock > + > +Example: > + > + rpc: spi@ee200000 { > + compatible = "renesas,r8a77995-rpc"; > + reg = <0 0xee200000 0 0x8100>, <0 0x08000000 0 0x4000000>; > + reg-names = "rpc_regs", "dirmap"; > + clocks = <&cpg CPG_MOD 917>; > + power-domains = <&sysc R8A77995_PD_ALWAYS_ON>; > + resets = <&cpg 917>; > + clock-names = "clk_rpc"; > + #address-cells = <1>; > + #size-cells = <0>; > + > + flash@0 { > + compatible = "jedec,spi-nor"; > + reg = <0>; > + spi-max-frequency = <40000000>; > + spi-tx-bus-width = <1>; > + spi-rx-bus-width = <1>; > + }; > + }; > -- Best regards, Marek Vasut