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Date: Tue, 30 Jan 2024 21:40:41 +0100
From: Henrik Grimler <henrik@...mler.se>
To: Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>,
Marek Szyprowski <m.szyprowski@...sung.com>
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
~postmarketos/upstreaming@...ts.sr.ht
Subject: [PATCH 3/3] ARM: dts: samsung: exynos5420-galaxy-tab-common:
decrease available memory
The last 6 MiB are used by trustzone firmware, and cannot be used by
Linux. Currently we are saved by that the proprietary bootloader
(sboot) passes available memory to kernel through ATAG_MEM. Change
memory range in any case so that we do not have to rely on ATAG_MEM.
Signed-off-by: Henrik Grimler <henrik@...mler.se>
---
Similar fix was applied for the exynos5422 odroids in commit
6591a02e17e6 ("ARM: dts: reduce total RAM by 22 MiB for
exynos5422-odroidxu3"):
https://lore.kernel.org/all/1421842972-25807-1-git-send-email-m.szyprowski@samsung.com/
---
arch/arm/boot/dts/samsung/exynos5420-galaxy-tab-common.dtsi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/samsung/exynos5420-galaxy-tab-common.dtsi b/arch/arm/boot/dts/samsung/exynos5420-galaxy-tab-common.dtsi
index d569fac29b18..ac929e282c84 100644
--- a/arch/arm/boot/dts/samsung/exynos5420-galaxy-tab-common.dtsi
+++ b/arch/arm/boot/dts/samsung/exynos5420-galaxy-tab-common.dtsi
@@ -40,7 +40,7 @@ chosen {
memory@...00000 {
device_type = "memory";
- reg = <0x20000000 0xc0000000>;
+ reg = <0x20000000 0xbfa00000>;
};
firmware@...3000 {
--
2.30.2
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