[PATCH v1 02/10] clk: at91: pmc: Save SCSR during suspend

From	Romain Izard <romain.izard.pro@gmail.com>
Newsgroups	linux.kernel
Subject	[PATCH v1 02/10] clk: at91: pmc: Save SCSR during suspend
Date	2017-09-08 17:50 +0200
Message-ID	<untHz-xc-1@gated-at.bofh.it> (permalink)
References	<untxU-tS-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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The contents of the System Clock Status Register (SCSR) needs to be
restored into the System Clock Enable Register (SCER).

As the bootloader will restore some clocks by itself, the issue can be
missed as only the USB controller, the LCD controller, the Image Sensor
controller and the programmable clocks will be impacted.

Fix the obvious typo in the suspend/resume code, as the IMR register
does not need to be saved twice.

Signed-off-by: Romain Izard <romain.izard.pro@gmail.com>
---
 drivers/clk/at91/pmc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index 5c2b26de303e..07dc2861ad3f 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -86,7 +86,7 @@ static int pmc_suspend(void)
 {
 	int i;
 
-	regmap_read(pmcreg, AT91_PMC_IMR, &pmc_cache.scsr);
+	regmap_read(pmcreg, AT91_PMC_SCSR, &pmc_cache.scsr);
 	regmap_read(pmcreg, AT91_PMC_PCSR, &pmc_cache.pcsr0);
 	regmap_read(pmcreg, AT91_CKGR_UCKR, &pmc_cache.uckr);
 	regmap_read(pmcreg, AT91_CKGR_MOR, &pmc_cache.mor);
@@ -129,7 +129,7 @@ static void pmc_resume(void)
 	if (pmc_cache.pllar != tmp)
 		pr_warn("PLLAR was not configured properly by the firmware\n");
 
-	regmap_write(pmcreg, AT91_PMC_IMR, pmc_cache.scsr);
+	regmap_write(pmcreg, AT91_PMC_SCER, pmc_cache.scsr);
 	regmap_write(pmcreg, AT91_PMC_PCER, pmc_cache.pcsr0);
 	regmap_write(pmcreg, AT91_CKGR_UCKR, pmc_cache.uckr);
 	regmap_write(pmcreg, AT91_CKGR_MOR, pmc_cache.mor);
-- 
2.11.0

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[PATCH v1 00/10] Various patches for SAMA5D2 backup mode Romain Izard <romain.izard.pro@gmail.com> - 2017-09-08 17:40 +0200
  [PATCH v1 04/10] mtd: nand: atmel: Avoid ECC errors when leaving backup mode Romain Izard <romain.izard.pro@gmail.com> - 2017-09-08 17:40 +0200
  [PATCH v1 01/10] clk: at91: pmc: Wait for clocks when resuming Romain Izard <romain.izard.pro@gmail.com> - 2017-09-08 17:40 +0200
  [PATCH v1 02/10] clk: at91: pmc: Save SCSR during suspend Romain Izard <romain.izard.pro@gmail.com> - 2017-09-08 17:50 +0200

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