clk: sunxi-ng: Add helper function to find closest rate

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The default behaviour of clocks in the sunxi-ng driver is to select a
clock rate that is closest to but less than the requested rate.

Add the ccu_is_better_rate() helper function that - depending on the
fact if thc CCU_FEATURE_CLOSEST_RATE flag is set - decides if a rate is
closer than another rate.

Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Frank Oltmanns <frank@oltmanns.dev>
Link: https://lore.kernel.org/r/20230807-pll-mipi_set_rate_parent-v6-5-f173239a4b59@oltmanns.dev
Signed-off-by: Chen-Yu Tsai <wens@csie.org>

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Frank Oltmanns 2023-08-07 14:43:38 +02:00 • committed by Chen-Yu Tsai

parent 48fb70cdd9

commit e373315d8f

2 changed files with 17 additions and 0 deletions

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12

drivers/clk/sunxi-ng/ccu_common.c

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5

drivers/clk/sunxi-ng/ccu_common.h

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