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regulator: Don't create voltage sysfs entries if we can't read voltage

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Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2011-11-02 11:39:09 +00:00
parent aebe495895
commit 4c78899b92
1 changed files with 2 additions and 1 deletions
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3
drivers/regulator/core.c
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@ -2503,7 +2503,8 @@ static int add_regulator_attributes(struct regulator_dev *rdev)
int status = 0; int status = 0;
/* some attributes need specific methods to be displayed */ /* some attributes need specific methods to be displayed */
if (ops->get_voltage || ops->get_voltage_sel) { if ((ops->get_voltage && ops->get_voltage(rdev) >= 0) ||
(ops->get_voltage_sel && ops->get_voltage_sel(rdev) >= 0)) {
status = device_create_file(dev, &dev_attr_microvolts); status = device_create_file(dev, &dev_attr_microvolts);
if (status < 0) if (status < 0)
return status; return status;