[PATCH v4 4/8] ARM: tegra: Set up L2 cache using Trusted Foundations firmware

[Dmitry Osipenko]

On Tegra30 L2 cache should be initialized using firmware call if CPU is
running in insecure mode. Initialize L2 cache and set up the outer-cache
callbacks early during boot using the firmware API.

Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
---
 arch/arm/mach-tegra/tegra.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index f9587be48235..67d8ae60ac67 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>
@@ -70,9 +71,18 @@ u32 tegra_uart_config[3] = {
 	0,
 };
 
+static void __init tegra_trusted_foundations_l2x0_cache_init(void)
+{
+	if (IS_ENABLED(CONFIG_CACHE_L2X0) &&
+	    IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) &&
+	    of_machine_is_compatible("nvidia,tegra30"))
+		call_firmware_op(l2x0_init);
+}
+
 static void __init tegra_init_early(void)
 {
 	of_register_trusted_foundations();
+	tegra_trusted_foundations_l2x0_cache_init();
 	tegra_cpu_reset_handler_init();
 }
 
-- 
2.20.1