at91: kernel v5.15: copy config and patches from 5.10

[openwrt/openwrt.git] / target / linux / at91 / patches-5.15 / 215-ARM-at91-pm-add-backup-mode-support-for-SAMA7G5.patch

diff --git a/target/linux/at91/patches-5.15/215-ARM-at91-pm-add-backup-mode-support-for-SAMA7G5.patch b/target/linux/at91/patches-5.15/215-ARM-at91-pm-add-backup-mode-support-for-SAMA7G5.patch
new file mode 100644 (file)
index 0000000..cc5f4ae
--- /dev/null
+++ b/target/linux/at91/patches-5.15/215-ARM-at91-pm-add-backup-mode-support-for-SAMA7G5.patch
@@ -0,0 +1,52 @@
+From 62be32b56ff31b2cd048a53fac40a165c5bc66cd Mon Sep 17 00:00:00 2001
+From: Claudiu Beznea <claudiu.beznea@microchip.com>
+Date: Thu, 15 Apr 2021 13:50:06 +0300
+Subject: [PATCH 215/247] ARM: at91: pm: add backup mode support for SAMA7G5
+
+Adapt at91_pm_backup_init() to work for SAMA7G5. Also, set the LPM pin
+to shutdown controller. This will signal to PMIC that it needs to switch
+to the state corresponding to backup mode.
+
+Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
+Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
+Link: https://lore.kernel.org/r/20210415105010.569620-21-claudiu.beznea@microchip.com
+---
+ arch/arm/mach-at91/pm.c         | 3 ++-
+ arch/arm/mach-at91/pm_suspend.S | 7 +++++++
+ 2 files changed, 9 insertions(+), 1 deletion(-)
+
+--- a/arch/arm/mach-at91/pm.c
++++ b/arch/arm/mach-at91/pm.c
+@@ -744,7 +744,8 @@ static int __init at91_pm_backup_init(vo
+       struct platform_device *pdev;
+       int ret = -ENODEV, located = 0;
+ 
+-      if (!IS_ENABLED(CONFIG_SOC_SAMA5D2))
++      if (!IS_ENABLED(CONFIG_SOC_SAMA5D2) &&
++          !IS_ENABLED(CONFIG_SOC_SAMA7G5))
+               return -EPERM;
+ 
+       if (!at91_is_pm_mode_active(AT91_PM_BACKUP))
+--- a/arch/arm/mach-at91/pm_suspend.S
++++ b/arch/arm/mach-at91/pm_suspend.S
+@@ -106,6 +106,12 @@ lp_done_\ena:
+ #endif
+       .endm
+ 
++      .macro at91_backup_set_lpm reg
++#ifdef CONFIG_SOC_SAMA7
++      orr     \reg, \reg, #0x200000
++#endif
++      .endm
++
+       .text
+ 
+       .arm
+@@ -989,6 +995,7 @@ ulp_exit:
+       ldr     r0, .shdwc
+       mov     tmp1, #0xA5000000
+       add     tmp1, tmp1, #0x1
++      at91_backup_set_lpm tmp1
+       str     tmp1, [r0, #0]
+ .endm
+