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 9c9e08f..7396e18 100644 (file)
--- 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