spi: rockchip: precompute rx sample delay
Now that we no longer potentially change spi clock at runtime we can precompute the rx sample delay at probe time rather than for each transfer. Signed-off-by: Emil Renner Berthing <kernel@esmil.dk> Tested-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Mark Brown <broonie@kernel.org>
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