linux-kernel - [PATCH] regulator: gpio-regulator: Set the smallest voltage/current in the specified range

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Date:	Thu, 22 Mar 2012 14:08:04 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Heiko Stübner <heiko@...ech.de>,
	Liam Girdwood <lrg@...com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: [PATCH] regulator: gpio-regulator: Set the smallest voltage/current
 in the specified range

Do not assume the gpio regulator states map is sorted in any order.
This patch ensures we always set the smallest voltage/current that falls within
the specified range.

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
 drivers/regulator/gpio-regulator.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/regulator/gpio-regulator.c b/drivers/regulator/gpio-regulator.c
index 42e1cb1..b728b36 100644
--- a/drivers/regulator/gpio-regulator.c
+++ b/drivers/regulator/gpio-regulator.c
@@ -105,15 +105,15 @@ static int gpio_regulator_set_value(struct regulator_dev *dev,
 					int min, int max)
 {
 	struct gpio_regulator_data *data = rdev_get_drvdata(dev);
-	int ptr, target, state;
+	int ptr, target, state, best_val = INT_MAX;
 
-	target = -1;
 	for (ptr = 0; ptr < data->nr_states; ptr++)
-		if (data->states[ptr].value >= min &&
+		if (data->states[ptr].value < best_val &&
+		    data->states[ptr].value >= min &&
 		    data->states[ptr].value <= max)
 			target = data->states[ptr].gpios;
 
-	if (target < 0)
+	if (best_val == INT_MAX)
 		return -EINVAL;
 
 	for (ptr = 0; ptr < data->nr_gpios; ptr++) {
-- 
1.7.5.4



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