Commit 84ee0c81 authored Feb 10, 2022 by Dirk Buchwalder Committed by Greg Kroah-Hartman Apr 15, 2022

clk: qcom: ipq8074: Use floor ops for SDCC1 clock



[ Upstream commit b77d8306d84f83d1da68028a68c91da9c867b6f6 ]

Use floor ops on SDCC1 APPS clock in order to round down selected clock
frequency and avoid overclocking SD/eMMC cards.

For example, currently HS200 cards were failling tuning as they were
actually being clocked at 384MHz instead of 192MHz.
This caused some boards to disable 1.8V I/O and force the eMMC into the
standard HS mode (50MHz) and that appeared to work despite the eMMC being
overclocked to 96Mhz in that case.

There was a previous commit to use floor ops on SDCC clocks, but it looks
to have only covered SDCC2 clock.

Fixes: 9607f622 ("clk: qcom: ipq8074: add PCIE, USB and SDCC clocks")

Signed-off-by: Dirk Buchwalder <buchwalder@posteo.de>
Signed-off-by: Robert Marko <robimarko@gmail.com>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220210173100.505128-1-robimarko@gmail.com


Signed-off-by: Sasha Levin <sashal@kernel.org>

parent dd719fca

drivers/clk/qcom/gcc-ipq8074.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1074,7 +1074,7 @@ static struct clk_rcg2 sdcc1_apps_clk_src = {
		.name = "sdcc1_apps_clk_src",
		.parent_names = gcc_xo_gpll0_gpll2_gpll0_out_main_div2,
		.num_parents = 4,
		.ops = &clk_rcg2_ops,
		.ops = &clk_rcg2_floor_ops,
		},
		};