From: Ryan Wanner Date: Thu, 27 Feb 2025 15:51:58 +0000 (-0700) Subject: ARM: at91: pm: Add Backup mode for SAMA7D65 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=23b43c1a821615e04848f85ff90dcc3c3aa96c0c;p=users%2Fjedix%2Flinux-maple.git 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 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 --- diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c index 6c4e168f18447..a2d188b478669 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))