From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomer Maimon Subject: [PATCH v1 1/2] dt-binding: soc: Add common LPC snoop documentation Date: Mon, 10 Jun 2019 16:32:44 +0300 Message-ID: <20190610133245.306812-2-tmaimon77@gmail.com> References: <20190610133245.306812-1-tmaimon77@gmail.com> Return-path: In-Reply-To: <20190610133245.306812-1-tmaimon77@gmail.com> Sender: linux-kernel-owner@vger.kernel.org To: olof@lixom.net, gregkh@linuxfoundation.org, arnd@arndb.de, robh+dt@kernel.org, mark.rutland@arm.com, avifishman70@gmail.com, venture@google.com, yuenn@google.com, benjaminfair@google.com, joel@jms.id.au Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, openbmc@lists.ozlabs.org, Tomer Maimon List-Id: devicetree@vger.kernel.org Added device tree binding documentation for Nuvoton BMC NPCM BIOS Post Code (BPC) and Aspeed AST2500 LPC snoop. The LPC snoop monitoring two configurable I/O addresses written by the host on Low Pin Count (LPC) bus. Signed-off-by: Tomer Maimon Reviewed-by: Andrew Jeffery Reviewed-by: Rob Herring --- .../devicetree/bindings/soc/lpc/lpc-snoop.txt | 27 +++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 Documentation/devicetree/bindings/soc/lpc/lpc-snoop.txt diff --git a/Documentation/devicetree/bindings/soc/lpc/lpc-snoop.txt b/Documentation/devicetree/bindings/soc/lpc/lpc-snoop.txt new file mode 100644 index 000000000000..c21cb8df4ffb --- /dev/null +++ b/Documentation/devicetree/bindings/soc/lpc/lpc-snoop.txt @@ -0,0 +1,27 @@ +LPC snoop interface + +The LPC snoop (BIOS Post Code) interface can monitor +two configurable I/O addresses written by the host on +the Low Pin Count (LPC) bus. + +Nuvoton NPCM7xx LPC snoop supports capture double words, +when using capture double word only I/O address 1 is monitored. + +Required properties for lpc-snoop node +- compatible : "nuvoton,npcm750-lpc-bpc-snoop" for Poleg NPCM7XX + "aspeed,ast2500-lpc-snoop" for Aspeed AST2500. +- reg : specifies physical base address and size of the registers. +- interrupts : contain the LPC snoop interrupt with flags for falling edge. +- snoop-ports : contain monitor I/O addresses, at least one monitor I/O + address required + +Optional property for NPCM7xx lpc-snoop node +- nuvoton,lpc-en-dwcapture : enable capture double words support. + +Example: + lpc-snoop: lpc_snoop@f0007040 { + compatible = "nuvoton,npcm750-lpc-bpc-snoop"; + reg = <0xf0007040 0x14>; + snoop-ports = <0x80>; + interrupts = ; + }; -- 2.18.0