linux-kernel - [PATCH v2 5/9] arm64: dts: realtek: rtd16xx: Carve out boot ROM from memory

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Message-Id: <20191202102910.26916-6-afaerber@suse.de>
Date:   Mon,  2 Dec 2019 11:29:06 +0100
From:   Andreas Färber <afaerber@...e.de>
To:     linux-realtek-soc@...ts.infradead.org
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Andreas Färber <afaerber@...e.de>,
        James Tai <james.tai@...ltek.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>, devicetree@...r.kernel.org
Subject: [PATCH v2 5/9] arm64: dts: realtek: rtd16xx: Carve out boot ROM from memory

Update Mjolnir /memory node to exclude 0..0x2dfff from reg entry.
Add this region to /soc ranges instead.

Suggested-by: Rob Herring <robh@...nel.org>
Cc: James Tai <james.tai@...ltek.com>
Signed-off-by: Andreas Färber <afaerber@...e.de>
---
 TODO: Add Fixes header once RTD1619 has a stable -rc1 based commit hash.

 To be followed up by patch unshadowing more RAM from /soc 0x98000000..0xffffffff,
 once we know the higher RAM windows.
 
 v2: New
 
 arch/arm64/boot/dts/realtek/rtd1619-mjolnir.dts | 5 +++--
 arch/arm64/boot/dts/realtek/rtd16xx.dtsi        | 4 +++-
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/boot/dts/realtek/rtd1619-mjolnir.dts b/arch/arm64/boot/dts/realtek/rtd1619-mjolnir.dts
index 44dd67e04335..90ed6681468f 100644
--- a/arch/arm64/boot/dts/realtek/rtd1619-mjolnir.dts
+++ b/arch/arm64/boot/dts/realtek/rtd1619-mjolnir.dts
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
 /*
  * Copyright (c) 2019 Realtek Semiconductor Corp.
+ * Copyright (c) 2019 Andreas Färber
  */
 
 /dts-v1/;
@@ -11,9 +12,9 @@
 	compatible = "realtek,mjolnir", "realtek,rtd1619";
 	model = "Realtek Mjolnir EVB";
 
-	memory@0 {
+	memory@...00 {
 		device_type = "memory";
-		reg = <0x0 0x80000000>;
+		reg = <0x2e000 0x7ffd2000>; /* boot ROM to 2 GiB */
 	};
 
 	chosen {
diff --git a/arch/arm64/boot/dts/realtek/rtd16xx.dtsi b/arch/arm64/boot/dts/realtek/rtd16xx.dtsi
index c7bbf2c7bb7c..69cc0d941c8d 100644
--- a/arch/arm64/boot/dts/realtek/rtd16xx.dtsi
+++ b/arch/arm64/boot/dts/realtek/rtd16xx.dtsi
@@ -3,6 +3,7 @@
  * Realtek RTD16xx SoC family
  *
  * Copyright (c) 2019 Realtek Semiconductor Corp.
+ * Copyright (c) 2019 Andreas Färber
  */
 
 #include <dt-bindings/interrupt-controller/arm-gic.h>
@@ -107,7 +108,8 @@
 		compatible = "simple-bus";
 		#address-cells = <1>;
 		#size-cells = <1>;
-		ranges = <0x98000000 0x98000000 0x68000000>;
+		ranges = <0x00000000 0x00000000 0x0002e000>, /* boot ROM */
+			 <0x98000000 0x98000000 0x68000000>;
 
 		rbus: bus@...00000 {
 			compatible = "simple-bus";
-- 
2.16.4