From: Thomas Abraham Date: Mon, 18 Jan 2010 05:30:16 +0000 (+0900) Subject: ARM: SAMSUNG: Add check to ensure that clksrc_clk does have multiple clock sources X-Git-Tag: v3.12-rc1~10800^2~3^2~68^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b8792dbff6ed93c5a77f71917d4a0c5efa12eee1;p=kernel%2Fkernel-generic.git 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 Signed-off-by: Ben Dooks --- diff --git a/arch/arm/plat-samsung/clock-clksrc.c b/arch/arm/plat-samsung/clock-clksrc.c index 33c633a..98c6b88 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;