From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: ARC-Seal: i=1; a=rsa-sha256; t=1518419347; cv=none; d=google.com; s=arc-20160816; b=OOf8XbTn2ZS5HtkmHbu5azdWEMCd1EPJ5yy4ix4fWgTlBtXtHMihx3oVv6yEQMo2Mp WuGsz7N6JU89HaVcz53onxBM92cvIAA5ord0vrZn9dQjSqdtc+vvZ8AZjThq2Xzx0mv6 2D3ta1QUb1H/oFWeR38NqgTF52HFH/05E33pR+TcSZaCHPboyv37TxZkoaeRa7+V4K7c vkBTzxXWQFvrqW6NCPoMUiQ7sZTlUU1YwSspUhrUjvYVAW8XBh/nsq86Lr4RMIRhnqbb rIwvufYpvCZRRGUzBlhFRWijnoyjRIJoXv30zYqEl125OD0Wcpy6uswOfOr5KKNZyilI q0PQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=references:in-reply-to:message-id:date:subject:cc:to:from:sender :dkim-signature:arc-authentication-results; bh=eNpEXsIVrxsQO6RsHiKZUBXRoHWgwzXkOWOw6UdhmSA=; b=d/MikNeE5FWZVv8f5UhJ6hbnoZgjgEQw7XaHGYbXn38rwLNneTlNTP43o0dl4amASY jw16BgQ7hy7jg0kXs+ECV/7RWfY1cU5w49JkwJiI/ueUNrsLvkiG5vtiUJ10OPsLWFrj jdhfEKv6n1OBC3V1ty3H1e+BB6iY8T1Cl3TPT8d51/SYxS9EUVYU5ABZ82KxzuKg1bXc BssjFJ3cOIf/sZ3/aSlBpH7n6rB/2SEftq0Srs0ubzB2K4Dlx1VoElBzaLs/CNOT55Rg 4iEt754qqyah0fRzzgNhbAC5IbOAomqJncvhzTf+fRQDFYAa7ksp1twIuxZU/DdYGq3Y RxXg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=eyEtR+oW; spf=pass (google.com: domain of joel.stan@gmail.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=joel.stan@gmail.com Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=eyEtR+oW; spf=pass (google.com: domain of joel.stan@gmail.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=joel.stan@gmail.com X-Google-Smtp-Source: AH8x225MFW9YU/IWzWAbLohYh8a3i3xFZ6o/5qgadDlMFrkxLehkPAjH9xrguNfmmvfLNryVIGhLag== Sender: "joel.stan@gmail.com" From: Joel Stanley To: Lee Jones , Rob Herring , Mark Rutland Cc: Arnd Bergmann , Greg Kroah-Hartman , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Andrew Jeffery , Cyril Bur , Benjamin Herrenschmidt , Ryan Chen , Lei YU Subject: [PATCH 1/3] dt-bindings: aspeed-lpc: Document LPC Host Interface Controller Date: Mon, 12 Feb 2018 17:38:45 +1030 Message-Id: <20180212070847.32387-2-joel@jms.id.au> X-Mailer: git-send-email 2.15.1 In-Reply-To: <20180212070847.32387-1-joel@jms.id.au> References: <20180212070847.32387-1-joel@jms.id.au> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1592178085601098938?= X-GMAIL-MSGID: =?utf-8?q?1592178085601098938?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: The LPC Host Interface Controller is part of a BMC SoC that is used for communication with the host. Signed-off-by: Joel Stanley --- .../devicetree/bindings/mfd/aspeed-lpc.txt | 40 ++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/Documentation/devicetree/bindings/mfd/aspeed-lpc.txt b/Documentation/devicetree/bindings/mfd/aspeed-lpc.txt index 514d82ced95b..94a31de109c4 100644 --- a/Documentation/devicetree/bindings/mfd/aspeed-lpc.txt +++ b/Documentation/devicetree/bindings/mfd/aspeed-lpc.txt @@ -109,6 +109,46 @@ lpc: lpc@1e789000 { }; }; +BMC Node Children +================== + +LPC Host Interface Controller +------------------- + +The LPC Host Interface Controller manages functions exposed to the host such as +LPC firmware hub cycles, configuration of the LPC-to-AHB mapping, UART +management and bus snoop configuration. + +Required properties: + +- compatible: One of: + "aspeed,ast2400-lpc-ctrl"; + "aspeed,ast2500-lpc-ctrl"; + +- reg: contains offset/length values of the host interface controller + memory regions + +- clocks: contains a phandle to the syscon node describing the clocks. + There should then be one cell representing the clock to use + +- memory-region: A phandle to a reserved_memory region to be used for the LPC + to AHB mapping + +- flash: A phandle to the SPI flash controller containing the flash to + be exposed over the LPC to AHB mapping + +Example: + +lpc-host@80 { + lpc_ctrl: lpc-ctrl@0 { + compatible = "aspeed,ast2500-lpc-ctrl"; + reg = <0x0 0x80>; + clocks = <&syscon ASPEED_CLK_GATE_LCLK>; + memory-region = <&flash_memory>; + flash = <&spi>; + }; +}; + Host Node Children ================== -- 2.15.1