linux-kernel - [PATCH 3/3] arm64: dts: ti: k3-j7200-mcu-wakeup: Split fss node up

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Date:   Mon, 24 Apr 2023 12:36:23 -0500
From:   Nishanth Menon <nm@...com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Vignesh Raghavendra <vigneshr@...com>
CC:     <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Tero Kristo <kristo@...nel.org>, Nishanth Menon <nm@...com>,
        <vaishnav.a@...com>, <afd@...com>, <u-kumar1@...com>
Subject: [PATCH 3/3] arm64: dts: ti: k3-j7200-mcu-wakeup: Split fss node up

fss node claims to be entirely a syscon node, but it is really two
parts of it - one a syscon that controls the hbmc mux and a simple bus
where ospi, hbmc peripherals are located. So model it accordingly by
splitting the node up and using ti,j721e-system-controller to describe
the syscon

Signed-off-by: Nishanth Menon <nm@...com>
---
 .../boot/dts/ti/k3-j7200-mcu-wakeup.dtsi      | 21 +++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi
index b58a31371bf3..7653cb191be1 100644
--- a/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi
@@ -338,18 +338,27 @@ mcu_spi2: spi@...20000 {
 		status = "disabled";
 	};
 
-	fss: syscon@...00000 {
-		compatible = "syscon", "simple-mfd";
+	hbmc_syscon: syscon@...00000 {
+		compatible = "ti,j721e-system-controller", "syscon", "simple-mfd";
 		reg = <0x00 0x47000000 0x00 0x100>;
-		#address-cells = <2>;
-		#size-cells = <2>;
-		ranges;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0x00 0x00 0x47000000 0x100>;
 
-		hbmc_mux: hbmc-mux {
+		hbmc_mux: mux-controller@4 {
 			compatible = "mmio-mux";
+			reg = <0x4 0x2>;
 			#mux-control-cells = <1>;
 			mux-reg-masks = <0x4 0x2>; /* HBMC select */
 		};
+	};
+
+	fss: bus@...30000 {
+		compatible = "simple-bus";
+		reg = <0x0 0x47030000 0x0 0x100>;
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
 
 		hbmc: hyperbus@...34000 {
 			compatible = "ti,am654-hbmc";
-- 
2.40.0