linux-kernel - [RFC PATCH 38/40] arm64: dts: k3-am6: Add mux-controller dt node required for muxing SERDES

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Date:   Fri, 21 Sep 2018 15:51:53 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Jingoo Han <jingoohan1@...il.com>,
        Joao Pinto <Joao.Pinto@...opsys.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Rob Herring <robh+dt@...nel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Murali Karicheri <m-karicheri2@...com>,
        Kishon Vijay Abraham I <kishon@...com>,
        <Gustavo.Pimentel@...opsys.com>
CC:     Mark Rutland <mark.rutland@....com>,
        Santosh Shilimkar <ssantosh@...nel.org>,
        Tero Kristo <t-kristo@...com>, Nishanth Menon <nm@...com>,
        <linux-pci@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: [RFC PATCH 38/40] arm64: dts: k3-am6: Add mux-controller dt node required for muxing SERDES

Add mux-controller dt node as a child node of scm_conf. This is
required for muxing SERDES between USB, PCIe and ICSS2 SGMII. While
at that also add "simple-mfd" compatible string to scm_conf dt node
so that mux-controller device gets created.

Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
---
 arch/arm64/boot/dts/ti/k3-am65-main.dtsi | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
index 957c9125a453..4379c370f6f8 100644
--- a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
@@ -7,8 +7,15 @@
 
 &cbass_main {
 	scm_conf: scm_conf@...000 {
-		compatible = "syscon";
+		compatible = "syscon", "simple-mfd";
 		reg = <0 0x00100000 0 0x1c000>;
+
+		serdes_mux: mux-controller {
+			compatible = "mmio-mux";
+			#mux-control-cells = <1>;
+			mux-reg-masks = <0x4080 0x3>, /* SERDES0 lane select */
+					<0x4090 0x3>; /* SERDES1 lane select */
+		};
 	};
 
 	gic500: interrupt-controller@...0000 {
-- 
2.17.1