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authorRussell King <rmk+kernel@arm.linux.org.uk>2014-03-17 13:59:08 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2014-05-30 01:48:45 +0200
commitd9d1f3e2d71144348d73210cf9f1fe0b32481c79 (patch)
treee96baeb96ed19979819dc197e11b1e0e9c06c627 /arch/arm/mm
parentARM: l2c: fix register naming (diff)
downloadlinux-d9d1f3e2d71144348d73210cf9f1fe0b32481c79.tar.xz
linux-d9d1f3e2d71144348d73210cf9f1fe0b32481c79.zip
ARM: l2c: check that DT files specify the required "cache-unified" property
This is a required property, and should always be specified. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm')
-rw-r--r--arch/arm/mm/cache-l2x0.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c
index c5c8a4152825..790343b2c13b 100644
--- a/arch/arm/mm/cache-l2x0.c
+++ b/arch/arm/mm/cache-l2x0.c
@@ -1364,6 +1364,10 @@ int __init l2x0_of_init(u32 aux_val, u32 aux_mask)
data = of_match_node(l2x0_ids, np)->data;
+ /* All L2 caches are unified, so this property should be specified */
+ if (!of_property_read_bool(np, "cache-unified"))
+ pr_err("L2C: device tree omits to specify unified cache\n");
+
/* L2 configuration can only be changed if the cache is disabled */
if (!(readl_relaxed(l2x0_base + L2X0_CTRL) & L2X0_CTRL_EN))
if (data->of_parse)