linux-kernel - [PATCH 1/4] arm64: dts: ti: k3-j721e-mcu-wakeup: Add HyperBus node

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Date:   Fri, 5 May 2023 19:44:04 +0530
From:   Vaishnav Achath <vaishnav.a@...com>
To:     <nm@...com>, <afd@...com>, <vigneshr@...com>, <kristo@...nel.org>,
        <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>
CC:     <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <u-kumar1@...com>,
        <vaishnav.a@...com>
Subject: [PATCH 1/4] arm64: dts: ti: k3-j721e-mcu-wakeup: Add HyperBus node

J721E has a Flash SubSystem that has one OSPI and one HyperBus with
muxed datapath and another independent OSPI. Add DT nodes for HyperBus
controller and keep it disabled and model the data path selection mux as a
reg-mux. Also the register region range for FSS only have description
for registers up to 0x7c, update that and fix the fss node name to fix
DT compile warning.

Signed-off-by: Vaishnav Achath <vaishnav.a@...com>
---
 .../boot/dts/ti/k3-j721e-mcu-wakeup.dtsi      | 25 +++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi
index 24e8125db8c4..6dfd76619a4a 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi
@@ -174,13 +174,34 @@
 		status = "disabled";
 	};
 
-	fss: fss@...00000 {
+	fss: bus@...00000 {
 		compatible = "simple-bus";
-		reg = <0x0 0x47000000 0x0 0x100>;
+		reg = <0x0 0x47000000 0x0 0x7c>;
 		#address-cells = <2>;
 		#size-cells = <2>;
 		ranges;
 
+		hbmc_mux: mux-controller@...00004 {
+			compatible = "reg-mux";
+			reg = <0x00 0x47000004 0x00 0x2>;
+			#mux-control-cells = <1>;
+			mux-reg-masks = <0x4 0x2>; /* HBMC select */
+		};
+
+		hbmc: hyperbus@...34000 {
+			compatible = "ti,am654-hbmc";
+			reg = <0x00 0x47034000 0x00 0x0c>,
+				<0x05 0x00000000 0x01 0x0000000>;
+			power-domains = <&k3_pds 102 TI_SCI_PD_EXCLUSIVE>;
+			clocks = <&k3_clks 102 0>;
+			assigned-clocks = <&k3_clks 102 5>;
+			assigned-clock-rates = <333333333>;
+			#address-cells = <2>;
+			#size-cells = <1>;
+			mux-controls = <&hbmc_mux 0>;
+			status = "disabled";
+		};
+
 		ospi0: spi@...40000 {
 			compatible = "ti,am654-ospi", "cdns,qspi-nor";
 			reg = <0x0 0x47040000 0x0 0x100>,
-- 
2.17.1