[PATCH v3 2/2 RESEND] ARM: dts: aspeed-g6: add pcie-kcs4

[Grégoire Layet]

Add pcie_kcs4 node to the LPC bus in the ast2600 g6 common dtsi.

The ASPEED AST2600 has a PCIe to LPC controller. It includes a KCS
interface on channel 4. This is a fully KCS-compatible interface
that is exposed over PCIe.

This can be used by the host for IPMI when the PCIe BMC Device is
activated.

While the PCIe to LPC Controller provides KCS channels 1, 2,
3 and 4 over PCI, this patch only adds channel 4.
This needs little adjustment to the driver and provides PCIe BMC Devices,
like the Asus IPMI Expansion Card, the IPMI over PCIe feature.

The pcie_kcs4 uses existing "aspeed,ast2600-kcs-bmc" compatible as it's a
standard KCS interface.

Node placed according to the ascending address ordering.
'dt-check-style --mode strict' reports no issues on added lines, except
'line-length' issues.

Signed-off-by: Grégoire Layet <gregoire.layet at 9elements.com>
---
 arch/arm/boot/dts/aspeed/aspeed-g6.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm/boot/dts/aspeed/aspeed-g6.dtsi b/arch/arm/boot/dts/aspeed/aspeed-g6.dtsi
index 56bb3b0444f7..c9d94c25d1ad 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-g6.dtsi
+++ b/arch/arm/boot/dts/aspeed/aspeed-g6.dtsi
@@ -656,6 +656,14 @@ ibt: ibt at 140 {
 					clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
 					status = "disabled";
 				};
+
+				pcie_kcs4: kcs at 914 {
+					compatible = "aspeed,ast2600-kcs-bmc";
+					reg = <0x914 0x1>, <0x918 0x1>, <0x91c 0x1>;
+					interrupts = <GIC_SPI 177 IRQ_TYPE_LEVEL_HIGH>;
+
+					status = "disabled";
+				};
 			};

 			sdc: sdc at 1e740000 {
--
2.54.0