From: Mason Yang <masonccyang@mxic.com.tw>
To: broonie@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com,
linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org,
linux-renesas-soc@vger.kernel.org,
Geert Uytterhoeven <geert+renesas@glider.be>,
devicetree@vger.kernel.org
Cc: juliensu@mxic.com.tw, Simon Horman <horms@verge.net.au>,
lee.jones@linaro.org, sergei.shtylyov@cogentembedded.com,
Mason Yang <masonccyang@mxic.com.tw>,
marek.vasut@gmail.com, miquel.raynal@bootlin.com
Subject: [PATCH v16 2/2] dt-bindings: spi: Document Renesas R-Car Gen3 RPC-IF controller bindings
Date: Wed, 31 Jul 2019 10:14:18 +0800 [thread overview]
Message-ID: <1564539258-16313-3-git-send-email-masonccyang@mxic.com.tw> (raw)
In-Reply-To: <1564539258-16313-1-git-send-email-masonccyang@mxic.com.tw>
Document the bindings used by the Renesas R-Car Gen3 RPC-IF controller.
Signed-off-by: Mason Yang <masonccyang@mxic.com.tw>
Reviewed-by: Rob Herring <robh@kernel.org>
---
.../devicetree/bindings/spi/spi-renesas-rpc.txt | 45 ++++++++++++++++++++++
1 file changed, 45 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..d4344c9
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/spi-renesas-rpc.txt
@@ -0,0 +1,45 @@
+Renesas R-Car Gen3 RPC-IF controller Device Tree Bindings
+---------------------------------------------------------
+
+Required properties:
+- compatible: should be an SoC-specific compatible value, followed by
+ "renesas,rcar-gen3-rpc" as a fallback.
+ supported SoC-specific values are:
+ "renesas,r8a77980-rpc" (R-Car V3H)
+ "renesas,r8a77995-rpc" (R-Car D3)
+- reg: should contain three register areas:
+ first for the base address of RPC-IF registers,
+ second for the direct mapping read mode and
+ third for the write buffer area.
+- reg-names: should contain "regs", "dirmap" and "wbuf"
+- clocks: should contain the clock phandle/specifier pair for the module clock.
+- clock-names: should contain "rpc"
+- power-domains: should contain the power domain phandle/secifier pair.
+- resets: should contain the reset controller phandle/specifier pair.
+- #address-cells: should be 1
+- #size-cells: should be 0
+- flash: should be represented by a subnode of the RPC-IF node,
+ its "compatible" property contains "jedec,spi-nor" if SPI is used.
+
+Example:
+
+ rpc: spi@ee200000 {
+ compatible = "renesas,r8a77995-rpc", "renesas,rcar-gen3-rpc";
+ reg = <0 0xee200000 0 0x200>, <0 0x08000000 0 0x4000000>,
+ <0 0xee208000 0 0x100>;
+ reg-names = "regs", "dirmap", "wbuf";
+ clocks = <&cpg CPG_MOD 917>;
+ clock-names = "rpc";
+ power-domains = <&sysc R8A77995_PD_ALWAYS_ON>;
+ resets = <&cpg 917>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ flash@0 {
+ compatible = "jedec,spi-nor";
+ reg = <0>;
+ spi-max-frequency = <40000000>;
+ spi-tx-bus-width = <4>;
+ spi-rx-bus-width = <4>;
+ };
+ };
--
1.9.1
prev parent reply other threads:[~2019-07-31 1:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-31 2:14 [PATCH v16 0/2] spi: Add Renesas R-Car Gen3 RPC-IF SPI driver Mason Yang
2019-07-31 2:14 ` [PATCH v16 1/2] spi: Add Renesas R-Car Gen3 RPC-IF SPI controller driver Mason Yang
2019-08-02 20:02 ` Sergei Shtylyov
2019-08-05 2:00 ` masonccyang
2019-07-31 2:14 ` Mason Yang [this message]
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