The regulator framework has a set of helpers functions to be used when
the system is entering and leaving from suspend but these are not called
on Exynos platforms. This means that the .set_suspend_* function handlers
defined by regulator drivers are not called when the system is suspended.
Suggested-by: Doug Anderson <dianders@xxxxxxxxxxxx>
Signed-off-by: Javier Martinez Canillas <javier.martinez@xxxxxxxxxxxxxxx>
---
arch/arm/mach-exynos/suspend.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/arch/arm/mach-exynos/suspend.c b/arch/arm/mach-exynos/suspend.c
index cc8d237..ee9a8e0 100644
--- a/arch/arm/mach-exynos/suspend.c
+++ b/arch/arm/mach-exynos/suspend.c
@@ -20,6 +20,7 @@
#include <linux/io.h>
#include <linux/irqchip/arm-gic.h>
#include <linux/err.h>
+#include <linux/regulator/machine.h>
#include <asm/cacheflush.h>
#include <asm/hardware/cache-l2x0.h>
@@ -443,6 +444,22 @@ static int exynos_suspend_enter(suspend_state_t state)
static int exynos_suspend_prepare(void)
{
+ int ret;
+
+ /*
+ * REVISIT: It would be better if struct platform_suspend_ops
+ * .prepare handler get the suspend_state_t as a parameter to
+ * avoid hard-coding the suspend to mem state. It's safe to do
+ * it now only because the suspend_valid_only_mem function is
+ * used as the .valid callback used to check if a given state
+ * is supported by the platform anyways.
+ */
+ ret = regulator_suspend_prepare(PM_SUSPEND_MEM);
+ if (ret) {
+ pr_err("Failed to prepare regulators for system suspend\n");
+ return ret;
+ }
+
s3c_pm_check_prepare();
return 0;
@@ -451,6 +468,7 @@ static int exynos_suspend_prepare(void)
static void exynos_suspend_finish(void)
{
s3c_pm_check_cleanup();
+ regulator_suspend_finish();
}
static const struct platform_suspend_ops exynos_suspend_ops = {
--
2.1.0
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