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/rk3399_rockchip-uboot/drivers/clk/rockchip/
H A Dclk_rk3288.c11fbeef50c1bcee6aa4ff957a5eafab7b2bd788e Mon May 15 06:07:10 UTC 2017 Ziyuan Xu <xzy.xu@rock-chips.com> rockchip: clk: rk3288: add support for the clock phase

This patch adds phase adjustment for mmc clock(ciu_sample), which is
used to select the optimal sampling point of a data input.

The phase shift is achieved through 255 delay elements(40-80
picoseconds), and calculate the number of delay element via clock
frequency.

Signed-off-by: Ziyuan Xu <xzy.xu@rock-chips.com>