At imx6ul_init_machine, it calls imx6ul_pm_init which needs to find
platform device for ocram, but the default populate platform device is at
of_platform_default_populate_init, which is located at arch_initcall_sync,
and called later than arch_initcall (.init_machine is located at that).
So below warning message will be showed during boots up:
imx6q_suspend_init: failed to find ocram device!
imx6_pm_common_init: No DDR LPM support with suspend -19!
Due to lack of ocram device, the suspend mode "mem" which needs ocram to
store suspend routine code is invalid.
This commit populates platform device before imx6ul_pm_init like other
imx6 platforms do, and the suspend mode "mem" can work successfully.
Cc: Anson Huang <anson.huang@xxxxxxx>
Cc: Fabio Estevam <fabio.estevam@xxxxxxx>
Cc: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Cc: Rob Herring <robh@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Fixes: 850bea2335e4 ("arm: Remove unnecessary of_platform_populate
with default match table")
Signed-off-by: Peter Chen <peter.chen@xxxxxxx>
Reviewed-by: Fabio Estevam <fabio.estevam@xxxxxxx>
---
Changes for v2:
- Add Fabio's Reviewed-by tag
- Using the correct commit-id for "Fixes" tag
arch/arm/mach-imx/mach-imx6ul.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/mach-imx/mach-imx6ul.c b/arch/arm/mach-imx/mach-imx6ul.c
index 5d9bfab..6bb7d9c 100644
--- a/arch/arm/mach-imx/mach-imx6ul.c
+++ b/arch/arm/mach-imx/mach-imx6ul.c
@@ -64,6 +64,7 @@ static void __init imx6ul_init_machine(void)
if (parent == NULL)
pr_warn("failed to initialize soc device\n");
+ of_platform_default_populate(NULL, NULL, parent);
imx6ul_enet_init();
imx_anatop_init();
imx6ul_pm_init();
--
1.9.1
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