linux-kernel - [PATCH] mfd: sec-core: Prepare regulators for suspend state to reduce power-consumption

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Message-id: <1402311930-24056-1-git-send-email-cw00.choi@samsung.com>
Date:	Mon, 09 Jun 2014 20:05:30 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	lee.jones@...aro.org, sbkim73@...sung.com, sameo@...ux.intel.com
Cc:	myungjoo.ham@...sung.com, kyungmin.park@...sung.com,
	linux-kernel@...r.kernel.org, Chanwoo Choi <cw00.choi@...sung.com>
Subject: [PATCH] mfd: sec-core: Prepare regulators for suspend state to reduce
 power-consumption

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@...sung.com>
---
This patch has a dependency on following patchset[1].
- [1] https://lkml.org/lkml/2014/6/9/255
  [PATCHv4 0/3] mfd: sec-core: Add support S2MPU02 PMIC device

 drivers/mfd/sec-core.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c
index 5e8784b..e3413d5 100644
--- a/drivers/mfd/sec-core.c
+++ b/drivers/mfd/sec-core.c
@@ -30,6 +30,7 @@
 #include <linux/mfd/samsung/s2mps14.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[] = {
@@ -406,6 +407,13 @@ 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;
+	};
+
 	return 0;
 }
 
-- 
1.8.0

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