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

Tomer Maimon
2019-04-15T12:13:22Z

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