[8/8] ARM: at91: pm: add quirk for sam9x60's ulp1
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Message ID 1579522208-19523-9-git-send-email-claudiu.beznea@microchip.com
State New
Headers show
Series
  • PM fixes and improvements for SAM9X60
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Commit Message

Claudiu Beznea Jan. 20, 2020, 12:10 p.m. UTC
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>
---
 arch/arm/mach-at91/pm_suspend.S | 4 ++++
 1 file changed, 4 insertions(+)

Patch
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diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S
index 4e9eb4f57f16..be9764e8d3fa 100644
--- a/arch/arm/mach-at91/pm_suspend.S
+++ b/arch/arm/mach-at91/pm_suspend.S
@@ -275,6 +275,10 @@  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 */