From: Lukas Timmermann <linux@timmermann.space>
To: Krzysztof Kozlowski <krzk@kernel.org>,
Alim Akhtar <alim.akhtar@samsung.com>,
Rob Herring <robh@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Russell King <linux@armlinux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, phone-devel@vger.kernel.org,
Lukas Timmermann <linux@timmermann.space>,
Alexandre Marquet <tb@a-marquet.fr>,
Henrik Grimler <henrik@grimler.se>
Subject: [PATCH v4 3/3] ARM: samsung: exynos5250: Allow CPU1 to boot
Date: Tue, 27 Jan 2026 21:40:58 +0100 [thread overview]
Message-ID: <20260127-lat3st-staging-v4-3-797469aaaf9d@timmermann.space> (raw)
In-Reply-To: <20260127-lat3st-staging-v4-0-797469aaaf9d@timmermann.space>
From: Alexandre Marquet <tb@a-marquet.fr>
The firmware trustzone needs a special call to bring up the secondary
cpu core on the Manta board. This seems to be not needed on other
exynos5 boards and comes down to the available firmware on
a particular board.
Signed-off-by: Alexandre Marquet <tb@a-marquet.fr>
Signed-off-by: Lukas Timmermann <linux@timmermann.space>
Reviewed-by: Henrik Grimler <henrik@grimler.se>
---
arch/arm/mach-exynos/firmware.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-exynos/firmware.c b/arch/arm/mach-exynos/firmware.c
index a5e22678e27b..e9b0ed07bb90 100644
--- a/arch/arm/mach-exynos/firmware.c
+++ b/arch/arm/mach-exynos/firmware.c
@@ -61,10 +61,10 @@ static int exynos_cpu_boot(int cpu)
* Exynos3250 doesn't need to send smc command for secondary CPU boot
* because Exynos3250 removes WFE in secure mode.
*
- * On Exynos5 devices the call is ignored by trustzone firmware.
+ * On most Exynos5 devices the call is ignored by trustzone firmware.
*/
if (!soc_is_exynos4210() && !soc_is_exynos4212() &&
- !soc_is_exynos4412())
+ !soc_is_exynos4412() && !of_machine_is_compatible("google,manta"))
return 0;
/*
--
2.52.0
next prev parent reply other threads:[~2026-01-27 20:41 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-27 20:40 [PATCH v4 0/3] Add support for exynos5250-manta (Google Nexus 10) Lukas Timmermann
2026-01-27 20:40 ` [PATCH v4 1/3] dt-bindings: ARM: samsung: Add Google Manta (Nexus 10) Lukas Timmermann
2026-01-27 20:40 ` [PATCH v4 2/3] ARM: dts: exynos: " Lukas Timmermann
2026-01-27 20:40 ` Lukas Timmermann [this message]
2026-02-26 21:14 ` (subset) [PATCH v4 3/3] ARM: samsung: exynos5250: Allow CPU1 to boot Krzysztof Kozlowski
2026-01-28 10:58 ` [PATCH v4 0/3] Add support for exynos5250-manta (Google Nexus 10) Krzysztof Kozlowski
2026-02-26 21:13 ` (subset) " Krzysztof Kozlowski
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