linux-kernel - [PATCH v3] regulator: treat regulators with constant volatage as fixed

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Message-id: <1352800177-16139-1-git-send-email-m.szyprowski@samsung.com>
Date:	Tue, 13 Nov 2012 10:49:37 +0100
From:	Marek Szyprowski <m.szyprowski@...sung.com>
To:	linux-kernel@...r.kernel.org, linux-mmc@...r.kernel.org
Cc:	Marek Szyprowski <m.szyprowski@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Liam Girdwood <lrg@...com>, Chris Ball <cjb@...top.org>
Subject: [PATCH v3] regulator: treat regulators with constant volatage as fixed

Some drivers has additional logic for fixed regulators. Let regulator core
to treat regulators which cannot change their voltage due to applied
constraints as fixed.

Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
---
 drivers/regulator/core.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 042c1ff..d07c240 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1872,7 +1872,14 @@ int regulator_count_voltages(struct regulator *regulator)
 {
 	struct regulator_dev	*rdev = regulator->rdev;
 
-	return rdev->desc->n_voltages ? : -EINVAL;
+	if (rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE) {
+		if (rdev->desc->n_voltages)
+			return rdev->desc->n_voltages;
+		else
+			return -EINVAL;
+	} else {
+		return 1;
+	}
 }
 EXPORT_SYMBOL_GPL(regulator_count_voltages);
 
-- 
1.7.9.5

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