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regulator: Export regulator name via sysfs 

Provide a new file 'name' in the regulator sysfs class with a human
readable name for the regulator for use in applications.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Mark Brown 2008-10-10 15:33:20 +01:00 committed by Liam Girdwood
parent 42fad570b6
commit bc558a60b5
2 changed files with 31 additions and 0 deletions
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13
Documentation/ABI/testing/sysfs-class-regulator
View File

@ -157,6 +157,19 @@ Description:
platform code.
What: /sys/class/regulator/.../name
Date: October 2008
KernelVersion: 2.6.28
Contact: Liam Girdwood <lrg@slimlogic.co.uk>
Description:
Each regulator directory will contain a field called
name. This holds a string identifying the regulator for
display purposes.
NOTE: this will be empty if no suitable name is provided
by platform or regulator drivers.
What: /sys/class/regulator/.../num_users
Date: April 2008
KernelVersion: 2.6.26

18
drivers/regulator/core.c
View File

@ -241,6 +241,22 @@ static ssize_t regulator_uA_show(struct device *dev,
return sprintf(buf, "%d\n", _regulator_get_current_limit(rdev));
}
static ssize_t regulator_name_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct regulator_dev *rdev = dev_get_drvdata(dev);
const char *name;
if (rdev->constraints->name)
name = rdev->constraints->name;
else if (rdev->desc->name)
name = rdev->desc->name;
else
name = "";
return sprintf(buf, "%s\n", name);
}
static ssize_t regulator_opmode_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@ -473,7 +489,9 @@ static ssize_t regulator_suspend_standby_state_show(struct device *dev,
else
return sprintf(buf, "disabled\n");
}
static struct device_attribute regulator_dev_attrs[] = {
__ATTR(name, 0444, regulator_name_show, NULL),
__ATTR(microvolts, 0444, regulator_uV_show, NULL),
__ATTR(microamps, 0444, regulator_uA_show, NULL),
__ATTR(opmode, 0444, regulator_opmode_show, NULL),