diff options
| author | Ryan Wanner <Ryan.Wanner@microchip.com> | 2025-02-27 08:51:58 -0700 |
|---|---|---|
| committer | Claudiu Beznea <claudiu.beznea@tuxon.dev> | 2025-03-02 17:35:07 +0200 |
| commit | 23b43c1a821615e04848f85ff90dcc3c3aa96c0c (patch) | |
| tree | f04748e3b9f070f59e96658039a16969caaaf3f3 | |
| parent | 8e96f5080eeef70fccf7007a025de98661a549d8 (diff) | |
ARM: at91: pm: Add Backup mode for SAMA7D65
Add config check that enables Backup mode for SAMA7D65 SoC.
Add SHDWC_SR read to clear the status bits once finished exiting backup
mode. This is only for SAMA7D65 SoCs. The SHDWC status register
needs to be cleared after exiting backup mode to clear the wake up pin
status.
Signed-off-by: Ryan Wanner <Ryan.Wanner@microchip.com>
Link: https://lore.kernel.org/r/3a1f59af1ac9322b0203694b535d5d13120a31eb.1740671156.git.Ryan.Wanner@microchip.com
[claudiu.beznea: dropped extra blank lines, use {} for multi-line
statements that includes comments, s/PM/pm in commit title to have the
same pattern accross all commits]
Signed-off-by: Claudiu Beznea <claudiu.beznea@tuxon.dev>
| -rw-r--r-- | arch/arm/mach-at91/pm.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c index 6c4e168f1844..a2d188b47866 100644 --- a/arch/arm/mach-at91/pm.c +++ b/arch/arm/mach-at91/pm.c @@ -647,6 +647,11 @@ static void at91_pm_suspend(suspend_state_t state) at91_suspend_sram_fn = fncpy(at91_suspend_sram_fn, &at91_pm_suspend_in_sram, at91_pm_suspend_in_sram_sz); + + if (IS_ENABLED(CONFIG_SOC_SAMA7D65)) { + /* SHDWC.SR */ + readl(soc_pm.data.shdwc + 0x08); + } } else { at91_suspend_finish(0); } @@ -1065,7 +1070,8 @@ static int __init at91_pm_backup_init(void) int ret = -ENODEV, located = 0; if (!IS_ENABLED(CONFIG_SOC_SAMA5D2) && - !IS_ENABLED(CONFIG_SOC_SAMA7G5)) + !IS_ENABLED(CONFIG_SOC_SAMA7G5) && + !IS_ENABLED(CONFIG_SOC_SAMA7D65)) return -EPERM; if (!at91_is_pm_mode_active(AT91_PM_BACKUP)) |