linux-kernel - [PATCH 2.6.30] regulator: Fix default constraints for fixed voltage regulators

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Message-Id: <1240913378-22201-1-git-send-email-broonie@opensource.wolfsonmicro.com>
Date:	Tue, 28 Apr 2009 11:09:38 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Liam Girdwood <lrg@...mlogic.co.uk>
Cc:	linux-kernel@...r.kernel.org, David Brownell <david-b@...bell.net>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: [PATCH 2.6.30] regulator: Fix default constraints for fixed voltage regulators

Default voltage constraints were being provided for fixed voltage
regulator where board constraints were not provided but these constraints
used INT_MIN as the default minimum voltage which is not a valid value
since it is less than zero. Use 1uV instead.

Also set the default values we set in the constraints themselves since
otherwise the max_uV constraint we determine will not be stored in the
actual constraint strucutre and will therefore not be used.

Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
---
 drivers/regulator/core.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 01f7702..dccf94d 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -703,10 +703,13 @@ static int set_machine_constraints(struct regulator_dev *rdev,
 		int	cmin = constraints->min_uV;
 		int	cmax = constraints->max_uV;
 
-		/* it's safe to autoconfigure fixed-voltage supplies */
+		/* it's safe to autoconfigure fixed-voltage supplies
+		   and the constraints are used by list_voltage. */
 		if (count == 1 && !cmin) {
-			cmin = INT_MIN;
+			cmin = 1;
 			cmax = INT_MAX;
+			constraints->min_uV = cmin;
+			constraints->max_uV = cmax;
 		}
 
 		/* voltage constraints are optional */
-- 
1.6.2.4

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