[PATCH] clk: samsung: exynos5420: Preserve CPU clocks configuration during suspend/resume

[PATCH] clk: samsung: exynos5420: Preserve CPU clocks configuration during suspend/resume

[Marian Mihailescu]

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@gmail.com>
---
 drivers/clk/samsung/clk-exynos5420.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/clk/samsung/clk-exynos5420.c b/drivers/clk/samsung/clk-exynos5420.c
index 403b5a367a5b..3a991ca1ee36 100644
--- a/drivers/clk/samsung/clk-exynos5420.c
+++ b/drivers/clk/samsung/clk-exynos5420.c
@@ -165,6 +165,8 @@ static const unsigned long exynos5x_clk_regs[] __initconst = {
 	GATE_BUS_CPU,
 	GATE_SCLK_CPU,
 	CLKOUT_CMU_CPU,
+	APLL_CON0,
+	KPLL_CON0,
 	CPLL_CON0,
 	DPLL_CON0,
 	EPLL_CON0,
-- 
2.14.1

Re: [PATCH] clk: samsung: exynos5420: Preserve CPU clocks configuration during suspend/resume

[Sylwester Nawrocki]

On 10/29/19 01:50, Marian Mihailescu wrote:
> 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@gmail.com>

Patch applied, thank you.
Please remember to also Cc in future any clk patches to the linux-clk@vger.kernel.org 
mailing list.

> ---
>  drivers/clk/samsung/clk-exynos5420.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/clk/samsung/clk-exynos5420.c b/drivers/clk/samsung/clk-exynos5420.c
> index 403b5a367a5b..3a991ca1ee36 100644
> --- a/drivers/clk/samsung/clk-exynos5420.c
> +++ b/drivers/clk/samsung/clk-exynos5420.c
> @@ -165,6 +165,8 @@ static const unsigned long exynos5x_clk_regs[] __initconst = {
>  	GATE_BUS_CPU,
>  	GATE_SCLK_CPU,
>  	CLKOUT_CMU_CPU,
> +	APLL_CON0,
> +	KPLL_CON0,
>  	CPLL_CON0,
>  	DPLL_CON0,
>  	EPLL_CON0,