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clk: scmi: Fix the rounding of clock rate 

This fix rounds the clock rate properly by using quotient and not
remainder in the calculation. This issue was found while testing HDMI
in the Juno platform.

Fixes: 6d6a1d82ea ("clk: add support for clocks provided by SCMI")
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Amit Daniel Kachhap <amit.kachhap@arm.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Amit Daniel Kachhap 2018-07-31 11:25:55 +05:30 committed by Stephen Boyd
parent ce397d215c
commit 7a8655e19b
1 changed files with 2 additions and 3 deletions
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5
drivers/clk/clk-scmi.c
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@ -38,7 +38,6 @@ static unsigned long scmi_clk_recalc_rate(struct clk_hw *hw,
static long scmi_clk_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *parent_rate)
{
int step;
u64 fmin, fmax, ftmp;
struct scmi_clk *clk = to_scmi_clk(hw);
@ -60,9 +59,9 @@ static long scmi_clk_round_rate(struct clk_hw *hw, unsigned long rate,
ftmp = rate - fmin;
ftmp += clk->info->range.step_size - 1; /* to round up */
step = do_div(ftmp, clk->info->range.step_size);
do_div(ftmp, clk->info->range.step_size);
return step * clk->info->range.step_size + fmin;
return ftmp * clk->info->range.step_size + fmin;
}
static int scmi_clk_set_rate(struct clk_hw *hw, unsigned long rate,