linux-kernel - [PATCH] regulator: core: Report microvolts in sysfs even with only list

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Message-Id: <1346092666-17772-1-git-send-email-broonie@opensource.wolfsonmicro.com>
Date:	Mon, 27 Aug 2012 11:37:46 -0700
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Liam Girdwood <lrg@...com>
Cc:	linux-kernel@...r.kernel.org,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: [PATCH] regulator: core: Report microvolts in sysfs even with only list_voltage()

If a regulator only supports a single voltage list_voltage() can be used
to report what that voltage is so add this as one of the criteria for
creating the microvolts file in sysfs.

Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
---
 drivers/regulator/core.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 06186ba..db7d59a 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -3020,7 +3020,8 @@ static int add_regulator_attributes(struct regulator_dev *rdev)
 
 	/* some attributes need specific methods to be displayed */
 	if ((ops->get_voltage && ops->get_voltage(rdev) >= 0) ||
-	    (ops->get_voltage_sel && ops->get_voltage_sel(rdev) >= 0)) {
+	    (ops->get_voltage_sel && ops->get_voltage_sel(rdev) >= 0) ||
+	    (ops->list_voltage && ops->list_voltage(rdev, 0) >= 0)) {
 		status = device_create_file(dev, &dev_attr_microvolts);
 		if (status < 0)
 			return status;
-- 
1.7.10.4

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