ARM: ux500: Enable PL310 Level 2 Cache Controller in Device Tree

This provides PL310 Level 2 Cache Controller Device Tree
support for all u8500 based devices.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

2 files changed, 14 insertions, 1 deletions

diff --git a/arch/arm/boot/dts/db8500.dtsi b/arch/arm/boot/dts/db8500.dtsi
index 614a471df4a..ce3b56fb913 100644
--- a/arch/arm/boot/dts/db8500.dtsi
+++ b/arch/arm/boot/dts/db8500.dtsi
@@ -29,6 +29,14 @@
                               <0xa0410100 0x100>;
                 };
 
+                L2: l2-cache {
+                        compatible = "arm,pl310-cache";
+                        reg = <0xa0412000 0x1000>;
+                        interrupts = <0 13 4>;
+                        cache-unified;
+                        cache-level = <2>;
+                };
+
                 pmu {
                         compatible = "arm,cortex-a9-pmu";
                         interrupts = <0 7 0x4>;
diff --git a/arch/arm/mach-ux500/cache-l2x0.c b/arch/arm/mach-ux500/cache-l2x0.c
index da5569d83d5..77a75ed0df6 100644
--- a/arch/arm/mach-ux500/cache-l2x0.c
+++ b/arch/arm/mach-ux500/cache-l2x0.c
@@ -5,6 +5,8 @@
  */
 
 #include <linux/io.h>
+#include <linux/of.h>
+
 #include <asm/cacheflush.h>
 #include <asm/hardware/cache-l2x0.h>
 #include <mach/hardware.h>
@@ -45,7 +47,10 @@ static int __init ux500_l2x0_init(void)
         ux500_l2x0_unlock();
 
         /* 64KB way size, 8 way associativity, force WA */
-        l2x0_init(l2x0_base, 0x3e060000, 0xc0000fff);
+        if (of_have_populated_dt())
+                l2x0_of_init(0x3e060000, 0xc0000fff);
+        else
+                l2x0_init(l2x0_base, 0x3e060000, 0xc0000fff);
 
         /*
          * We can't disable l2 as we are in non secure mode, currently