ARM: dts: samsung: exynos4412: decrease memory to account for unusable region

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The last 4 MiB of RAM on those devices is likely used by trustzone
firmware, and is unusable under Linux. Change the device tree memory
node accordingly.

The proprietary bootloader (S-BOOT) passes these memory ranges through
ATAG_MEM; this change allows us to have the correct memory ranges
without relying on ATAG_MEM.

Tested-by: Henrik Grimler <henrik@grimler.se> # i9300, i9305
Signed-off-by: Artur Weber <aweber.kernel@gmail.com>
Link: https://lore.kernel.org/r/20240217-exynos4-memsize-fix-v1-1-7858e9c5f844@gmail.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

...

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Artur Weber 2024-02-27 09:07:55 +01:00 • committed by Arnd Bergmann

parent cceac3f06f

commit 784c93e3ca

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4 changed files with 4 additions and 4 deletions

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arch/arm/boot/dts/samsung/exynos4412-i9300.dts

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arch/arm/boot/dts/samsung/exynos4412-i9305.dts

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arch/arm/boot/dts/samsung/exynos4412-n710x.dts

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arch/arm/boot/dts/samsung/exynos4412-p4note.dtsi

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