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clk: sci-clk: add slack to clk-set-rate passed to firmware

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Add slack to the clock frequency parameters passed to firmware within
clk_set_rate. min-freq is changed to 0 and max-rate is changed to
ULONG_MAX. This fixes certain issues with pll clock rounding when the
firmware is not able to set the frequency exactly to the target, the
current implementation fails if the available frequency is even 1Hz off
the target. With the change, the firmware still tries its best to set
the frequency as close as possible to the target.

Reported-by: Vishal Mahaveer <vishalm@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
This commit is contained in:
Lokesh Vutla 2020-01-17 11:57:30 +05:30
parent 713a02a2ce
commit ea67b26e3f
1 changed files with 1 additions and 2 deletions
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3
drivers/clk/clk-ti-sci.c
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@ -106,8 +106,7 @@ static ulong ti_sci_clk_set_rate(struct clk *clk, ulong rate)
k3_avs_notify_freq(clk->id, clk->data, rate);
#endif
/* Ask for exact frequency by using same value for min/target/max */
ret = cops->set_freq(sci, clk->id, clk->data, rate, rate, rate);
ret = cops->set_freq(sci, clk->id, clk->data, 0, rate, ULONG_MAX);
if (ret)
dev_err(clk->dev, "%s: set_freq failed (%d)\n", __func__, ret);