Commit e7791079 authored Oct 14, 2014 by Doug Anderson Committed by Ulf Hansson Nov 10, 2014

mmc: dw_mmc: rockchip: Don't recalc the clock when it goes off



The "set_ios" function is called with a clock of 0 when the clock is
turning off.  There's no reason to go through all the extra Rockchip
logic (whose goal is to make sure DIV is 0 or 1) in that case.  The
Rockchip logic happened to work because the CCF will pick the lowest
possible rate when you ask it for a clock of 0, but it's silly to go
through all the remuxing and adjusting for no reason.

Signed-off-by: Doug Anderson <dianders@chromium.org>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

parent b19caf37

drivers/mmc/host/dw_mmc-rockchip.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -37,6 +37,9 @@ static void dw_mci_rk3288_set_ios(struct dw_mci host, struct mmc_ios ios)
		unsigned int cclkin;
		u32 bus_hz;

		if (ios->clock == 0)
		return;

		/*
		* cclkin: source clock of mmc controller
		* bus_hz: card interface clock generated by CLKGEN