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authorMaxime Ripard <maxime@cerno.tech>2022-09-26 10:45:09 +0200
committerStephen Boyd <sboyd@kernel.org>2022-09-30 23:28:18 +0200
commit6c5422851d8be8c7451e968fd2e6da41b6109e17 (patch)
treed22947dcc2235dce7cf3399e13baacfb0c293703 /drivers/clk/bcm
parentLinux 6.0-rc1 (diff)
downloadlinux-6c5422851d8be8c7451e968fd2e6da41b6109e17.tar.xz
linux-6c5422851d8be8c7451e968fd2e6da41b6109e17.zip
clk: bcm2835: Make peripheral PLLC critical
When testing for a series affecting the VEC, it was discovered that turning off and on the VEC clock is crashing the system. It turns out that, when disabling the VEC clock, it's the only child of the PLLC-per clock which will also get disabled. The source of the crash is PLLC-per being disabled. It's likely that some other device might not take a clock reference that it actually needs, but it's unclear which at this point. Let's make PLLC-per critical so that we don't have that crash. Reported-by: Noralf Trønnes <noralf@tronnes.org> Signed-off-by: Maxime Ripard <maxime@cerno.tech> Link: https://lore.kernel.org/r/20220926084509.12233-1-maxime@cerno.tech Reviewed-by: Stefan Wahren <stefan.wahren@i2se.com> Acked-by: Noralf Trønnes <noralf@tronnes.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Diffstat (limited to 'drivers/clk/bcm')
-rw-r--r--drivers/clk/bcm/clk-bcm2835.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/clk/bcm/clk-bcm2835.c b/drivers/clk/bcm/clk-bcm2835.c
index 48a1eb9f2d55..19de0e83b65d 100644
--- a/drivers/clk/bcm/clk-bcm2835.c
+++ b/drivers/clk/bcm/clk-bcm2835.c
@@ -1784,7 +1784,7 @@ static const struct bcm2835_clk_desc clk_desc_array[] = {
.load_mask = CM_PLLC_LOADPER,
.hold_mask = CM_PLLC_HOLDPER,
.fixed_divider = 1,
- .flags = CLK_SET_RATE_PARENT),
+ .flags = CLK_IS_CRITICAL | CLK_SET_RATE_PARENT),
/*
* PLLD is the display PLL, used to drive DSI display panels.