clk: meson: meson8b: make the CCF use the glitch-free mali mux

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[ Upstream commit 8daeaea99c ]

The "mali_0" or "mali_1" clock trees should not be updated while the
clock is running. Enforce this by setting CLK_SET_RATE_GATE on the
"mali_0" and "mali_1" gates. This makes the CCF switch to the "mali_1"
tree when "mali_0" is currently active and vice versa, which is exactly
what the vendor driver does when updating the frequency of the mali
clock.

This fixes a potential hang when changing the GPU frequency at runtime.

Fixes: 74e1f2521f ("clk: meson: meson8b: add the GPU clock tree")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Martin Blumenstingl 2019-12-26 20:12:23 +01:00 • committed by Greg Kroah-Hartman

parent 14d0c7d2a9

commit e0f49fe698

1 changed files with 7 additions and 4 deletions

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drivers/clk/meson/meson8b.c

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