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clk: ti: dra7-atl: Provide error check for incoming parameters in set_rate

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Check for valid parameters in check rate. Else, we end up getting
errors.

This occurs as part of the inital clock tree update of child clock
nodes where new_rate could be 0 for non functional clocks.

Fixes: 9ac33b0ce8 (" CLK: TI: Driver for DRA7 ATL (Audio Tracking Logic)")
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
This commit is contained in:
Nishanth Menon 2014-08-18 11:56:55 -05:00 committed by Tero Kristo
parent 2f10325176
commit 20411dad75
1 changed files with 5 additions and 1 deletions
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6
drivers/clk/ti/clk-dra7-atl.c
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@ -139,9 +139,13 @@ static long atl_clk_round_rate(struct clk_hw *hw, unsigned long rate,
static int atl_clk_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct dra7_atl_desc *cdesc = to_atl_desc(hw);
struct dra7_atl_desc *cdesc;
u32 divider;
if (!hw || !rate)
return -EINVAL;
cdesc = to_atl_desc(hw);
divider = ((parent_rate + rate / 2) / rate) - 1;
if (divider > DRA7_ATL_DIVIDER_MASK)
divider = DRA7_ATL_DIVIDER_MASK;