linux-kernel - [PATCH] regulator: disable supply regulator if it is enabled for boot-on

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Message-ID: <1344938848-29606-1-git-send-email-ldewangan@nvidia.com>
Date:	Tue, 14 Aug 2012 15:37:28 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	<broonie@...nsource.wolfsonmicro.com>, <lrg@...com>
CC:	<linux-kernel@...r.kernel.org>, <rabin.vincent@...il.com>,
	Laxman Dewangan <ldewangan@...dia.com>
Subject: [PATCH] regulator: disable supply regulator if it is enabled for boot-on

If supply regulator is enabled because of boot-on (not always-on)
then disable regulator need to be call if regulator have some
user or full constraint has been enabled.
This will make sure that reference count of supply regulator
is in sync with child regulator's state.

Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>
Reported-by: Rabin Vincent <rabin.vincent@...il.com>
---
 drivers/regulator/core.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 0fffeae..4632909 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -3614,8 +3614,11 @@ static int __init regulator_init_complete(void)
 
 		mutex_lock(&rdev->mutex);
 
-		if (rdev->use_count)
+		if (rdev->use_count) {
+			if (rdev->supply && c->boot_on)
+				regulator_disable(rdev->supply);
 			goto unlock;
+		}
 
 		/* If we can't read the status assume it's on. */
 		if (ops->is_enabled)
@@ -3634,6 +3637,8 @@ static int __init regulator_init_complete(void)
 			if (ret != 0) {
 				rdev_err(rdev, "couldn't disable: %d\n", ret);
 			}
+			if (rdev->supply)
+				regulator_disable(rdev->supply);
 		} else {
 			/* The intention is that in future we will
 			 * assume that full constraints are provided
-- 
1.7.1.1

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