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Subject[PATCH 5.4 071/215] ARM: at91: pm: add quirk for sam9x60s ulp1
Date
From: Claudiu Beznea <claudiu.beznea@microchip.com>

[ Upstream commit bb1a0e87e1c54cd884e9b92b1cec06b186edc7a0 ]

On SAM9X60 2 nop operations has to be introduced after setting
WAITMODE bit in CKGR_MOR.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/1579522208-19523-9-git-send-email-claudiu.beznea@microchip.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/arm/mach-at91/pm_suspend.S | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S
index ed57c879d4e17..2591cba61937b 100644
--- a/arch/arm/mach-at91/pm_suspend.S
+++ b/arch/arm/mach-at91/pm_suspend.S
@@ -268,6 +268,10 @@ ENDPROC(at91_backup_mode)
orr tmp1, tmp1, #AT91_PMC_KEY
str tmp1, [pmc, #AT91_CKGR_MOR]

+ /* Quirk for SAM9X60's PMC */
+ nop
+ nop
+
wait_mckrdy

/* Enable the crystal oscillator */
--
2.25.1


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