From d9d1f3e2d71144348d73210cf9f1fe0b32481c79 Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 17 Mar 2014 12:59:08 +0000 Subject: [PATCH] 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 --- arch/arm/mm/cache-l2x0.c | 4 ++++ 1 file changed, 4 insertions(+) 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) -- 2.20.1