[PATCH 3/3] ARM: exynos: use DT prefetch attributes rather than l2c_aux_val

[Guillaume Tucker]

Use the standard l2c2x0 device tree bindings to enable data and
instruction prefetch on exynos4210 and exynos4412 and clear the
respective bits in the default l2c_aux_val.  No other Exynos platform
relying on this default register value appears to be using the l2x0
cache.

Signed-off-by: Guillaume Tucker <guillaume.tuc...@collabora.com>
---
 arch/arm/boot/dts/exynos4210.dtsi | 2 ++
 arch/arm/boot/dts/exynos4412.dtsi | 2 ++
 arch/arm/mach-exynos/exynos.c     | 4 ++--
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/exynos4210.dtsi 
b/arch/arm/boot/dts/exynos4210.dtsi
index b4466232f0c1..7e0d253b26ef 100644
--- a/arch/arm/boot/dts/exynos4210.dtsi
+++ b/arch/arm/boot/dts/exynos4210.dtsi
@@ -102,6 +102,8 @@
                        reg = <0x10502000 0x1000>;
                        cache-unified;
                        cache-level = <2>;
+                       prefetch-data = <1>;
+                       prefetch-instr = <1>;
                        arm,tag-latency = <2 2 1>;
                        arm,data-latency = <2 2 1>;
                };
diff --git a/arch/arm/boot/dts/exynos4412.dtsi 
b/arch/arm/boot/dts/exynos4412.dtsi
index 48868947373e..37efa247bf4d 100644
--- a/arch/arm/boot/dts/exynos4412.dtsi
+++ b/arch/arm/boot/dts/exynos4412.dtsi
@@ -218,6 +218,8 @@
                        reg = <0x10502000 0x1000>;
                        cache-unified;
                        cache-level = <2>;
+                       prefetch-data = <1>;
+                       prefetch-instr = <1>;
                        arm,tag-latency = <2 2 1>;
                        arm,data-latency = <3 2 1>;
                        arm,double-linefill = <1>;
diff --git a/arch/arm/mach-exynos/exynos.c b/arch/arm/mach-exynos/exynos.c
index a96f3353a0c1..0e906cc3a48e 100644
--- a/arch/arm/mach-exynos/exynos.c
+++ b/arch/arm/mach-exynos/exynos.c
@@ -193,8 +193,8 @@ static void __init exynos_dt_fixup(void)
 }
 
 DT_MACHINE_START(EXYNOS_DT, "Samsung Exynos (Flattened Device Tree)")
-       .l2c_aux_val    = 0x38400000,
-       .l2c_aux_mask   = 0xc60fffff,
+       .l2c_aux_val    = 0x08400000,
+       .l2c_aux_mask   = 0xf60fffff,
        .smp            = smp_ops(exynos_smp_ops),
        .map_io         = exynos_init_io,
        .init_early     = exynos_firmware_init,
-- 
2.20.1