ARM: cache: add dt support for tauros2 cache

Signed-off-by: Chao Xie <xiechao.mail@gmail.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>

1 files changed, 34 insertions, 1 deletions

diff --git a/arch/arm/mm/cache-tauros2.c b/arch/arm/mm/cache-tauros2.c
index e9f054fc7e87..1be0f4e5e6eb 100644
--- a/arch/arm/mm/cache-tauros2.c
+++ b/arch/arm/mm/cache-tauros2.c
@@ -15,6 +15,8 @@
  */
 
 #include <linux/init.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
 #include <asm/cacheflush.h>
 #include <asm/cp15.h>
 #include <asm/cputype.h>
@@ -198,7 +200,7 @@ static void enable_extra_feature(unsigned int features)
         write_extra_features(u);
 }
 
-void __init tauros2_init(unsigned int features)
+static void __init tauros2_internal_init(unsigned int features)
 {
         char *mode = NULL;
 
@@ -294,3 +296,34 @@ void __init tauros2_init(unsigned int features)
         printk(KERN_INFO "Tauros2: L2 cache support initialised "
                          "in %s mode.\n", mode);
 }
+
+#ifdef CONFIG_OF
+static const struct of_device_id tauros2_ids[] __initconst = {
+        { .compatible = "marvell,tauros2-cache"},
+        {}
+};
+#endif
+
+void __init tauros2_init(unsigned int features)
+{
+#ifdef CONFIG_OF
+        struct device_node *node;
+        int ret;
+        unsigned int f;
+
+        node = of_find_matching_node(NULL, tauros2_ids);
+        if (!node) {
+                pr_info("Not found marvell,tauros2-cache, disable it\n");
+                return;
+        }
+
+        ret = of_property_read_u32(node, "marvell,tauros2-cache-features", &f);
+        if (ret) {
+                pr_info("Not found marvell,tauros-cache-features property, "
+                        "disable extra features\n");
+                features = 0;
+        } else
+                features = f;
+#endif
+        tauros2_internal_init(features);
+}