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

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@gmail.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/clk/samsung/clk-exynos5420.c b/drivers/clk/samsung/clk-exynos5420.c
index 2bb88d1251136148946aa06eed32fc60e86c70c3..7f8c7cf3c2ab9bc74122acfbfee6b3b1e476e0bb 100644 (file)
--- a/drivers/clk/samsung/clk-exynos5420.c
+++ b/drivers/clk/samsung/clk-exynos5420.c
@@ -170,6 +170,8 @@ 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,