linux-kernel - [PATCH] regulator: core: Fix logic to determinate if regulator can change voltage

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Message-ID: <1355229397.6766.2.camel@phoenix>
Date:	Tue, 11 Dec 2012 20:36:37 +0800
From:	Axel Lin <axel.lin@...ics.com>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	Marek Szyprowski <m.szyprowski@...sung.com>,
	Liam Girdwood <lrg@...com>, linux-kernel@...r.kernel.org
Subject: [PATCH] regulator: core: Fix logic to determinate if regulator can
 change voltage

Having a linear_min_sel setting means the first linear_min_sel selectors are
invalid. We need to subtract linear_min_sel when use n_voltages to determinate
if regulator can change voltage.

Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
 drivers/regulator/core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index cd1b201..0f65b24 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1886,7 +1886,7 @@ int regulator_can_change_voltage(struct regulator *regulator)
 
 	if (rdev->constraints &&
 	    rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE &&
-	    rdev->desc->n_voltages > 1)
+	    (rdev->desc->n_voltages - rdev->desc->linear_min_sel) > 1)
 		return 1;
 
 	return 0;
-- 
1.7.9.5



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