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authorThomas Abraham <thomas.ab@samsung.com>2010-01-18 14:30:16 +0900
committerBen Dooks <ben-linux@fluff.org>2010-01-18 15:28:37 +0900
commitb8792dbff6ed93c5a77f71917d4a0c5efa12eee1 (patch)
tree4c72869f4868043b559d2f8dc38151faf3adc9f0
parenta0de298a0eee7f9004a8e512c12c7b40d66c9934 (diff)
ARM: SAMSUNG: Add check to ensure that clksrc_clk does have multiple clock sources
Adds a additional check in s3c_set_clksrc function to ensure that the clksrc_clk does have a choice of multiple clock sources. In addition to this, a check is added to ensure that a parent is assigned to the clksrc_clk in case it does not have a choice of parent clocks. Signed-off-by: Thomas Abraham <thomas.ab@samsung.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
-rw-r--r--arch/arm/plat-samsung/clock-clksrc.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/arch/arm/plat-samsung/clock-clksrc.c b/arch/arm/plat-samsung/clock-clksrc.c
index 33c633a8be8..98c6b8859f4 100644
--- a/arch/arm/plat-samsung/clock-clksrc.c
+++ b/arch/arm/plat-samsung/clock-clksrc.c
@@ -129,11 +129,16 @@ void __init_or_cpufreq s3c_set_clksrc(struct clksrc_clk *clk, bool announce)
{
struct clksrc_sources *srcs = clk->sources;
u32 mask = bit_mask(clk->reg_src.shift, clk->reg_src.size);
- u32 clksrc = 0;
+ u32 clksrc;
- if (clk->reg_src.reg)
- clksrc = __raw_readl(clk->reg_src.reg);
+ if (!clk->reg_src.reg) {
+ if (!clk->clk.parent)
+ printk(KERN_ERR "%s: no parent clock specified\n",
+ clk->clk.name);
+ return;
+ }
+ clksrc = __raw_readl(clk->reg_src.reg);
clksrc &= mask;
clksrc >>= clk->reg_src.shift;