[PATCHv8 4/4] mfd: sec-core: Prepare regulators for suspend state to reduce power-consumption

From: Chanwoo Choi
Date: Wed Jun 25 2014 - 03:16:09 EST


This patch use regulator_suspend_prepare() function to prepare the proper state
of regulators for suspend state to remove un-necessary leakage power-consumption.

Signed-off-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx>
---
drivers/mfd/Kconfig | 1 +
drivers/mfd/sec-core.c | 10 ++++++++++
2 files changed, 11 insertions(+)

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index af0e83f..b5898dc 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -586,6 +586,7 @@ config MFD_SEC_CORE
select MFD_CORE
select REGMAP_I2C
select REGMAP_IRQ
+ select REGULATOR
help
Support for the Samsung Electronics MFD series.
This driver provides common support for accessing the device,
diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c
index 2621328..fb8ba64 100644
--- a/drivers/mfd/sec-core.c
+++ b/drivers/mfd/sec-core.c
@@ -31,6 +31,7 @@
#include <linux/mfd/samsung/s2mpu02.h>
#include <linux/mfd/samsung/s5m8763.h>
#include <linux/mfd/samsung/s5m8767.h>
+#include <linux/regulator/machine.h>
#include <linux/regmap.h>

static const struct mfd_cell s5m8751_devs[] = {
@@ -430,6 +431,15 @@ static int sec_pmic_suspend(struct device *dev)
*/
disable_irq(sec_pmic->irq);

+ switch (sec_pmic->device_type) {
+ case S2MPS14X:
+ case S2MPU02:
+ regulator_suspend_prepare(PM_SUSPEND_MEM);
+ break;
+ default:
+ break;
+ }
+
return 0;
}

--
1.8.0

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