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Date: Thu, 16 Jan 2020 11:40:53 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Marian Mihailescu <mihailescu2m@...il.com>,
Sylwester Nawrocki <s.nawrocki@...sung.com>,
Sasha Levin <sashal@...nel.org>,
linux-samsung-soc@...r.kernel.org, linux-clk@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org
Subject: [PATCH AUTOSEL 5.4 078/205] clk: samsung: exynos5420: Preserve CPU clocks configuration during suspend/resume
From: Marian Mihailescu <mihailescu2m@...il.com>
[ Upstream commit e21be0d1d7bd7f78a77613f6bcb6965e72b22fc1 ]
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@...il.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@...sung.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
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 31466cd1842f..3b7601647d7b 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,
--
2.20.1
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