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authorGregory CLEMENT <gregory.clement@free-electrons.com>2015-07-03 14:55:51 +0300
committerGregory CLEMENT <gregory.clement@free-electrons.com>2015-07-25 18:17:05 +0300
commit3cbd6a6ca81c9e8438b592099495a7c2b72de9e3 (patch)
tree90ea439ced4bb70a3ebbde0de9faa077f8a15f65 /arch/arm/mach-mvebu/pm.c
parentbb253e743affa9d0053add8d3a1089df82f1c854 (diff)
downloadlinux-3cbd6a6ca81c9e8438b592099495a7c2b72de9e3.tar.xz
ARM: mvebu: Add standby support
Until now only one Armada XP and one Armada 388 based board supported suspend to ram. However, most of the recent mvebu SoCs can support the standby mode. Unlike for the suspend to ram, nothing special has to be done for these SoCs. This patch allows the system to use the standby mode on Armada 370, 38x, 39x and XP SoCs. There are issues with the Armada 375, and the support might be added (if possible) in a future patch. Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Diffstat (limited to 'arch/arm/mach-mvebu/pm.c')
-rw-r--r--arch/arm/mach-mvebu/pm.c52
1 files changed, 44 insertions, 8 deletions
diff --git a/arch/arm/mach-mvebu/pm.c b/arch/arm/mach-mvebu/pm.c
index ca94f07407f1..b058307088f3 100644
--- a/arch/arm/mach-mvebu/pm.c
+++ b/arch/arm/mach-mvebu/pm.c
@@ -163,13 +163,10 @@ static int mvebu_pm_store_bootinfo(void)
return 0;
}
-static int mvebu_pm_enter(suspend_state_t state)
+static int mvebu_enter_suspend(void)
{
int ret;
- if (state != PM_SUSPEND_MEM)
- return -EINVAL;
-
ret = mvebu_pm_store_bootinfo();
if (ret)
return ret;
@@ -185,16 +182,57 @@ static int mvebu_pm_enter(suspend_state_t state)
set_cpu_coherent();
cpu_pm_exit();
+ return 0;
+}
+
+static int mvebu_pm_enter(suspend_state_t state)
+{
+ switch (state) {
+ case PM_SUSPEND_STANDBY:
+ cpu_do_idle();
+ break;
+ case PM_SUSPEND_MEM:
+ return mvebu_enter_suspend();
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int mvebu_pm_valid(suspend_state_t state)
+{
+ if (state == PM_SUSPEND_STANDBY)
+ return 1;
+
+ if (state == PM_SUSPEND_MEM && mvebu_board_pm_enter != NULL)
+ return 1;
return 0;
}
static const struct platform_suspend_ops mvebu_pm_ops = {
.enter = mvebu_pm_enter,
- .valid = suspend_valid_only_mem,
+ .valid = mvebu_pm_valid,
};
-int __init mvebu_pm_init(void (*board_pm_enter)(void __iomem *sdram_reg, u32 srcmd))
+static int __init mvebu_pm_init(void)
+{
+ if (!of_machine_is_compatible("marvell,armadaxp") &&
+ !of_machine_is_compatible("marvell,armada370") &&
+ !of_machine_is_compatible("marvell,armada380") &&
+ !of_machine_is_compatible("marvell,armada390"))
+ return -ENODEV;
+
+ suspend_set_ops(&mvebu_pm_ops);
+
+ return 0;
+}
+
+
+late_initcall(mvebu_pm_init);
+
+int __init mvebu_pm_suspend_init(void (*board_pm_enter)(void __iomem *sdram_reg,
+ u32 srcmd))
{
struct device_node *np;
struct resource res;
@@ -226,7 +264,5 @@ int __init mvebu_pm_init(void (*board_pm_enter)(void __iomem *sdram_reg, u32 src
mvebu_board_pm_enter = board_pm_enter;
- suspend_set_ops(&mvebu_pm_ops);
-
return 0;
}