clk: rockchip: reset init state before mmc card initialization

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mmc host controller's IO input/output timing is unpredictable if
bootloader execute tuning for HS200 mode. It might make kernel failed
to initialize mmc card in identification mode. The root cause is
tuning phase and degree setting for HS200 mode in bootloader aren't
applicable to that of identification mode in kernel stage. Anyway, we
can't force all bootloaders to reset tuning phase and degree setting
before into kernel. Simply reset it in rockchip_clk_register_mmc.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

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Shawn Lin 2015-09-04 08:15:33 +08:00 • committed by Stephen Boyd

parent 7a29f3f020

commit 7a03fe6f48

1 changed files with 11 additions and 0 deletions

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drivers/clk/rockchip/clk-mmc-phase.c

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