From: Claudiu Beznea <claudiu.beznea@microchip.com>
Date: Thu, 15 Apr 2021 10:50:01 +0000 (+0300)
Subject: ARM: at91: pm: wait for ddr power mode off
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5b0bef872c1d131c4a4b2abdd825d4d5f548a1a1;p=linux.git

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
---

diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S
index 9c9e08fd8300b..7396e18dd7e52 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