[PATCH v2 1/4] riscv: dts: Update memory configuration

[Padmarao Begari]

In the v2022.10 Icicle reference design, the seg registers are going to be
changed, resulting in a required change to the memory map.
A small 4MB reservation is made at the end of 32-bit DDR to provide some
memory for the HSS to use, so that it can cache its payload between
reboots of a specific context.

Co-developed-by: Conor Dooley <conor.dooley at microchip.com>
Signed-off-by: Conor Dooley <conor.dooley at microchip.com>
Signed-off-by: Padmarao Begari <padmarao.begari at microchip.com>
Reviewed-by: Conor Dooley <conor.dooley at microchip.com>
---
 arch/riscv/dts/microchip-mpfs-icicle-kit.dts | 70 ++++----------------
 1 file changed, 14 insertions(+), 56 deletions(-)

diff --git a/arch/riscv/dts/microchip-mpfs-icicle-kit.dts b/arch/riscv/dts/microchip-mpfs-icicle-kit.dts
index 287ef3d23b..876c475069 100644
--- a/arch/riscv/dts/microchip-mpfs-icicle-kit.dts
+++ b/arch/riscv/dts/microchip-mpfs-icicle-kit.dts
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
 /*
- * Copyright (C) 2021 Microchip Technology Inc.
+ * Copyright (C) 2021-2022 Microchip Technology Inc.
  * Padmarao Begari <padmarao.begari at microchip.com>
  */
 
@@ -28,70 +28,28 @@
 		timebase-frequency = <RTCCLK_FREQ>;
 	};
 
-	reserved-memory {
-		ranges;
-		#size-cells = <2>;
-		#address-cells = <2>;
-
-		fabricbuf0: fabricbuf at 0 {
-			compatible = "shared-dma-pool";
-			reg = <0x0 0xae000000 0x0 0x2000000>;
-			label = "fabricbuf0-ddr-c";
-		};
-
-		fabricbuf1: fabricbuf at 1 {
-			compatible = "shared-dma-pool";
-			reg = <0x0 0xc0000000 0x0 0x8000000>;
-			label = "fabricbuf1-ddr-nc";
-		};
-
-		fabricbuf2: fabricbuf at 2 {
-			compatible = "shared-dma-pool";
-			reg = <0x0 0xd8000000 0x0 0x8000000>;
-			label = "fabricbuf2-ddr-nc-wcb";
-		};
-	};
-
-	udmabuf0 {
-		compatible = "ikwzm,u-dma-buf";
-		device-name = "udmabuf-ddr-c0";
-		minor-number = <0>;
-		size = <0x0 0x2000000>;
-		memory-region = <&fabricbuf0>;
-		sync-mode = <3>;
-	};
-
-	udmabuf1 {
-		compatible = "ikwzm,u-dma-buf";
-		device-name = "udmabuf-ddr-nc0";
-		minor-number = <1>;
-		size = <0x0 0x8000000>;
-		memory-region = <&fabricbuf1>;
-		sync-mode = <3>;
-	};
-
-	udmabuf2 {
-		compatible = "ikwzm,u-dma-buf";
-		device-name = "udmabuf-ddr-nc-wcb0";
-		minor-number = <2>;
-		size = <0x0 0x8000000>;
-		memory-region = <&fabricbuf2>;
-		sync-mode = <3>;
-	};
-
 	ddrc_cache_lo: memory at 80000000 {
 		device_type = "memory";
-		reg = <0x0 0x80000000 0x0 0x2e000000>;
-		clocks = <&clkcfg CLK_DDRC>;
+		reg = <0x0 0x80000000 0x0 0x40000000>;
 		status = "okay";
 	};
 
 	ddrc_cache_hi: memory at 1000000000 {
 		device_type = "memory";
-		reg = <0x10 0x0 0x0 0x40000000>;
-		clocks = <&clkcfg CLK_DDRC>;
+		reg = <0x10 0x40000000 0x0 0x40000000>;
 		status = "okay";
 	};
+
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		hss_payload: region at BFC00000 {
+			reg = <0x0 0xBFC00000 0x0 0x400000>;
+			no-map;
+		};
+	};
 };
 
 &uart1 {
-- 
2.25.1