linux-kernel - [PATCH dts/arm/aspeed-g5 v1] ARM: dts: aspeed-g5: Add IPMI KCS nodes for SMS and SMM mode

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Date:   Sat, 31 Mar 2018 15:46:38 +0800
From:   Haiyue Wang <haiyue.wang@...ux.intel.com>
To:     joel@....id.au, robh+dt@...nel.org, mark.rutland@....com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, openbmc@...ts.ozlabs.org
Cc:     Haiyue Wang <haiyue.wang@...ux.intel.com>
Subject: [PATCH dts/arm/aspeed-g5 v1] ARM: dts: aspeed-g5: Add IPMI KCS nodes for SMS and SMM mode

The IPMI KCS device part of the LPC interface and is used for
communication with the host processor.

Keyboard Controller Style Interfaces:
The KCS channel number is assigned by AST_usrGuide_KCS.pdf
Name          | Use          | Address       | KCS Channel |
SMS Interface | SMS          | 0CA2h – 0CA3h | kcs3        |
SMM Interface | SMI handling | 0CA4h – 0CA5h | kcs4        |

Signed-off-by: Haiyue Wang <haiyue.wang@...ux.intel.com>
---
The kcs_bmc_aspeed driver is in linux-next now:
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/drivers/char/ipmi/kcs_bmc_aspeed.c?h=next-20180329
---
 arch/arm/boot/dts/aspeed-g5.dtsi | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/aspeed-g5.dtsi b/arch/arm/boot/dts/aspeed-g5.dtsi
index 17ee0fa3..8d6c4af 100644
--- a/arch/arm/boot/dts/aspeed-g5.dtsi
+++ b/arch/arm/boot/dts/aspeed-g5.dtsi
@@ -268,8 +268,22 @@
 				ranges = <0x0 0x1e789000 0x1000>;
 
 				lpc_bmc: lpc-bmc@0 {
-					compatible = "aspeed,ast2500-lpc-bmc";
+					compatible = "aspeed,ast2500-lpc-bmc", "simple-mfd", "syscon";
 					reg = <0x0 0x80>;
+					reg-io-width = <4>;
+
+					#address-cells = <1>;
+					#size-cells = <1>;
+					ranges = <0x0 0x0 0x80>;
+
+					kcs3: kcs3@0 {
+						compatible = "aspeed,ast2500-kcs-bmc";
+						reg = <0x0 0x80>;
+						interrupts = <8>;
+						kcs_chan = <3>;
+						kcs_addr = <0xca2>;
+						status = "disabled";
+					};
 				};
 
 				lpc_host: lpc-host@80 {
@@ -281,6 +295,15 @@
 					#size-cells = <1>;
 					ranges = <0x0 0x80 0x1e0>;
 
+					kcs4: kcs4@0 {
+						compatible = "aspeed,ast2500-kcs-bmc";
+						reg = <0x0 0xa0>;
+						interrupts = <8>;
+						kcs_chan = <4>;
+						kcs_addr = <0xca4>;
+						status = "disabled";
+					};
+
 					lpc_ctrl: lpc-ctrl@0 {
 						compatible = "aspeed,ast2500-lpc-ctrl";
 						reg = <0x0 0x80>;
-- 
2.7.4