This is a note to let you know that I've just added the patch titled clk: samsung: exynos5420: Preserve CPU clocks configuration during suspend/resume to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: clk-samsung-exynos5420-preserve-cpu-clocks-configuration-during-suspend-resume.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From e21be0d1d7bd7f78a77613f6bcb6965e72b22fc1 Mon Sep 17 00:00:00 2001 From: Marian Mihailescu <mihailescu2m@xxxxxxxxx> Date: Tue, 29 Oct 2019 11:20:25 +1030 Subject: clk: samsung: exynos5420: Preserve CPU clocks configuration during suspend/resume From: Marian Mihailescu <mihailescu2m@xxxxxxxxx> commit e21be0d1d7bd7f78a77613f6bcb6965e72b22fc1 upstream. Save and restore top PLL related configuration registers for big (APLL) and LITTLE (KPLL) cores during suspend/resume cycle. So far, CPU clocks were reset to default values after suspend/resume cycle and performance after system resume was affected when performance governor has been selected. Fixes: 773424326b51 ("clk: samsung: exynos5420: add more registers to restore list") Signed-off-by: Marian Mihailescu <mihailescu2m@xxxxxxxxx> Signed-off-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/clk/samsung/clk-exynos5420.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/clk/samsung/clk-exynos5420.c +++ b/drivers/clk/samsung/clk-exynos5420.c @@ -170,6 +170,8 @@ static const unsigned long exynos5x_clk_ GATE_BUS_CPU, GATE_SCLK_CPU, CLKOUT_CMU_CPU, + APLL_CON0, + KPLL_CON0, CPLL_CON0, DPLL_CON0, EPLL_CON0, Patches currently in stable-queue which might be from mihailescu2m@xxxxxxxxx are queue-4.9/clk-samsung-exynos5420-preserve-cpu-clocks-configuration-during-suspend-resume.patch