linux-kernel - [RFC] arm64: dts: use size of reserved partition for bl2

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Message-Id: <20230403105818.29624-1-linux@fw-web.de>
Date:   Mon,  3 Apr 2023 12:58:18 +0200
From:   Frank Wunderlich <linux@...web.de>
To:     linux-mediatek@...ts.infradead.org
Cc:     Frank Wunderlich <frank-w@...lic-files.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [RFC] arm64: dts: use size of reserved partition for bl2

From: Frank Wunderlich <frank-w@...lic-files.de>

To store uncompressed bl2 more space is required than partition is
actually defined.

Signed-off-by: Frank Wunderlich <frank-w@...lic-files.de>
---
I used the definition i got from mtk used in their SDK uboot.

Openwrt uses also the first reserved partition to give bl2 more
space:

https://git.openwrt.org/?p=openwrt/openwrt.git;a=blob;f=target/linux/mediatek/dts/mt7986a-bananapi-bpi-r3-nor.dts;h=f597b869abc80d1a73f44ebb85ad4da17376bb52;hb=HEAD#l22

so imho it should be same in mainline to not require complex bl2
compression.
---
 .../boot/dts/mediatek/mt7986a-bananapi-bpi-r3-nor.dtso     | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3-nor.dtso b/arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3-nor.dtso
index 84aa229e80f3..e48881be4ed6 100644
--- a/arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3-nor.dtso
+++ b/arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3-nor.dtso
@@ -27,15 +27,10 @@ partitions {
 
 					partition@0 {
 						label = "bl2";
-						reg = <0x0 0x20000>;
+						reg = <0x0 0x40000>;
 						read-only;
 					};
 
-					partition@...00 {
-						label = "reserved";
-						reg = <0x20000 0x20000>;
-					};
-
 					partition@...00 {
 						label = "u-boot-env";
 						reg = <0x40000 0x40000>;
-- 
2.34.1