[PATCH v1 1/2] dt-binding: misc: Add common LPC snoop documentation

From: Tomer Maimon <tmaimon77@gmail.com>
To: gregkh@linuxfoundation.org, arnd@arnd.de, robh+dt@kernel.org,
	mark.rutland@arm.com, yuenn@google.com, venture@google.com,
	brendanhiggins@google.com, avifishman70@gmail.com,
	joel@jms.id.au
Cc: linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org,
	openbmc@lists.ozlabs.org, linux-kernel@vger.kernel.org,
	Tomer Maimon <tmaimon77@gmail.com>
Subject: [PATCH v1 1/2] dt-binding: misc: Add common LPC snoop documentation
Date: Mon, 15 Apr 2019 15:12:34 +0300	[thread overview]
Message-ID: <20190415121235.255028-2-tmaimon77@gmail.com> (raw)
In-Reply-To: <20190415121235.255028-1-tmaimon77@gmail.com>

Added device tree binding documentation for Nuvoton BMC
NPCM BIOS Post Code (BPC) and Apeed 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 <tmaimon77@gmail.com>
---
 .../devicetree/bindings/misc/lpc-snoop.txt         | 27 ++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/misc/lpc-snoop.txt

diff --git a/Documentation/devicetree/bindings/misc/lpc-snoop.txt b/Documentation/devicetree/bindings/misc/lpc-snoop.txt
new file mode 100644
index 000000000000..7deac244ef9d
--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/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 = <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>;
+	};
\ No newline at end of file
-- 
2.14.1

