target/linux/at91/patches-5.15/211-ARM-at91-pm-wait-for-ddr-power-mode-off.patch

   1 From 2b522a22243938dd7613e09c954172b1fa6217f5 Mon Sep 17 00:00:00 2001
   2 From: Claudiu Beznea <claudiu.beznea@microchip.com>
   3 Date: Thu, 15 Apr 2021 13:50:01 +0300
   4 Subject: [PATCH 211/247] ARM: at91: pm: wait for ddr power mode off
   5
   6 Wait for DDR power mode off before shutting down the core.
   7
   8 Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
   9 Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
  10 Link: https://lore.kernel.org/r/20210415105010.569620-16-claudiu.beznea@microchip.com
  11 ---
  12  arch/arm/mach-at91/pm_suspend.S | 5 +++++
  13  1 file changed, 5 insertions(+)
  14
  15 --- a/arch/arm/mach-at91/pm_suspend.S
  16 +++ b/arch/arm/mach-at91/pm_suspend.S
  17 @@ -980,6 +980,11 @@ ulp_exit:
  18         mov     tmp1, #0x1
  19         str     tmp1, [r0, #0x10]
  20
  21 +       /* Wait for it. */
  22 +1:     ldr     tmp1, [r0, #0x10]
  23 +       tst     tmp1, #0x1
  24 +       beq     1b
  25 +
  26         /* Shutdown */
  27         ldr     r0, .shdwc
  28         mov     tmp1, #0xA5000000