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Date:   Mon, 18 Mar 2019 01:52:07 +0300
From:   Dmitry Osipenko <>
To:     Russell King <>,
        Thierry Reding <>,
        Jonathan Hunter <>,
        Robert Yang <>,
        Michał Mirosław <>
Subject: [PATCH v10 4/7] ARM: tegra: Set up L2 cache using Trusted Foundations firmware

On Tegra30 L2 cache should be initialized using firmware call if CPU
is running in insecure mode. Set up the required outer-cache write_sec()
callback early during boot using the firmware API, it is always a NO-OP
on T114+ and is NO-OP on T20/30 if Trusted Foundations firmware node
isn't present in device-tree.

Tested-by: Robert Yang <>
Tested-by: Michał Mirosław <>
Signed-off-by: Dmitry Osipenko <>
 arch/arm/mach-tegra/tegra.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index f9587be48235..1e89cfefbf68 100644
--- a/arch/arm/mach-tegra/tegra.c
+++ b/arch/arm/mach-tegra/tegra.c
@@ -38,6 +38,7 @@
 #include <soc/tegra/fuse.h>
 #include <soc/tegra/pmc.h>
+#include <asm/firmware.h>
 #include <asm/hardware/cache-l2x0.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/time.h>
@@ -74,6 +75,7 @@ static void __init tegra_init_early(void)
+	call_firmware_op(l2x0_init);
 static void __init tegra_dt_init_irq(void)

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