diff options
Diffstat (limited to 'drivers/clk/imx/clk-pllv3.c')
| -rw-r--r-- | drivers/clk/imx/clk-pllv3.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/clk/imx/clk-pllv3.c b/drivers/clk/imx/clk-pllv3.c index fc16416d5f..0cdb9df45d 100644 --- a/drivers/clk/imx/clk-pllv3.c +++ b/drivers/clk/imx/clk-pllv3.c @@ -121,10 +121,16 @@ static ulong clk_pllv3_sys_set_rate(struct clk *clk, ulong rate) { struct clk_pllv3 *pll = to_clk_pllv3(clk); unsigned long parent_rate = clk_get_parent_rate(clk); - unsigned long min_rate = parent_rate * 54 / 2; - unsigned long max_rate = parent_rate * 108 / 2; + unsigned long min_rate; + unsigned long max_rate; u32 val, div; + if (parent_rate == 0) + return -EINVAL; + + min_rate = parent_rate * 54 / 2; + max_rate = parent_rate * 108 / 2; + if (rate < min_rate || rate > max_rate) return -EINVAL; @@ -157,6 +163,9 @@ static ulong clk_pllv3_av_get_rate(struct clk *clk) u32 div = readl(pll->base) & pll->div_mask; u64 temp64 = (u64)parent_rate; + if (mfd == 0) + return -EIO; + temp64 *= mfn; do_div(temp64, mfd); @@ -167,13 +176,19 @@ static ulong clk_pllv3_av_set_rate(struct clk *clk, ulong rate) { struct clk_pllv3 *pll = to_clk_pllv3(clk); unsigned long parent_rate = clk_get_parent_rate(clk); - unsigned long min_rate = parent_rate * 27; - unsigned long max_rate = parent_rate * 54; + unsigned long min_rate; + unsigned long max_rate; u32 val, div; u32 mfn, mfd = 1000000; u32 max_mfd = 0x3FFFFFFF; u64 temp64; + if (parent_rate == 0) + return -EINVAL; + + min_rate = parent_rate * 27; + max_rate = parent_rate * 54; + if (rate < min_rate || rate > max_rate) return -EINVAL; |