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[v2,3/3] ARM: at91: pm: fallback to slowclock when backup mode fails

Message ID 20170510191612.24364-3-alexandre.belloni@free-electrons.com (mailing list archive)
State New, archived
Headers show

Commit Message

Alexandre Belloni May 10, 2017, 7:16 p.m. UTC 
If the backup sram allocation fails, ensure we can suspend by falling back
to the usual slow clock mode.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
---
 arch/arm/mach-at91/pm.c | 5 +++++
 1 file changed, 5 insertions(+)
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Patch

diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index ef9c1d29cc67..fc4026478579 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -544,6 +544,11 @@  static void __init at91_pm_backup_init(void)
 securam_fail:
 	iounmap(pm_data.sfrbu);
 	pm_data.sfrbu = NULL;
+
+	if (pm_data.standby_mode == AT91_PM_BACKUP)
+		pm_data.standby_mode = AT91_PM_SLOW_CLOCK;
+	if (pm_data.suspend_mode == AT91_PM_BACKUP)
+		pm_data.suspend_mode = AT91_PM_SLOW_CLOCK;
 }
 
 struct pmc_info {