at91: add kernel support for sama7g5 soc

[openwrt/staging/mkresin.git] / target / linux / at91 / patches-5.10 / 211-ARM-at91-pm-wait-for-ddr-power-mode-off.patch

diff --git a/target/linux/at91/patches-5.10/211-ARM-at91-pm-wait-for-ddr-power-mode-off.patch b/target/linux/at91/patches-5.10/211-ARM-at91-pm-wait-for-ddr-power-mode-off.patch
new file mode 100644 (file)
index 0000000..f94b479
--- /dev/null
+++ b/target/linux/at91/patches-5.10/211-ARM-at91-pm-wait-for-ddr-power-mode-off.patch
@@ -0,0 +1,33 @@
+From 2b522a22243938dd7613e09c954172b1fa6217f5 Mon Sep 17 00:00:00 2001
+From: Claudiu Beznea <claudiu.beznea@microchip.com>
+Date: Thu, 15 Apr 2021 13:50:01 +0300
+Subject: [PATCH 211/247] ARM: at91: pm: wait for ddr power mode off
+
+Wait for DDR power mode off before shutting down the core.
+
+Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
+Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
+Link: https://lore.kernel.org/r/20210415105010.569620-16-claudiu.beznea@microchip.com
+---
+ arch/arm/mach-at91/pm_suspend.S | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S
+index 9c9e08fd8300..7396e18dd7e5 100644
+--- a/arch/arm/mach-at91/pm_suspend.S
++++ b/arch/arm/mach-at91/pm_suspend.S
+@@ -980,6 +980,11 @@ ulp_exit:
+       mov     tmp1, #0x1
+       str     tmp1, [r0, #0x10]
+ 
++      /* Wait for it. */
++1:    ldr     tmp1, [r0, #0x10]
++      tst     tmp1, #0x1
++      beq     1b
++
+       /* Shutdown */
+       ldr     r0, .shdwc
+       mov     tmp1, #0xA5000000
+-- 
+2.32.0
+