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>

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>
Mark Brown · Liam Girdwood
1 parent 42fad570b6
Showing 2 changed files with 31 additions and 0 deletions Side-by-side Diff
Documentation/ABI/testing/sysfs-class-regulator
drivers/regulator/core.c
@@ -157,6 +157,19 @@
 		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
@@ -241,6 +241,22 @@
 	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 @@
 	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),
...	...	@@ -157,6 +157,19 @@
157	157	platform code.
158	158
159	159
	160	+What: /sys/class/regulator/.../name
	161	+Date: October 2008
	162	+KernelVersion: 2.6.28
	163	+Contact: Liam Girdwood <lrg@slimlogic.co.uk>
	164	+Description:
	165	+ Each regulator directory will contain a field called
	166	+ name. This holds a string identifying the regulator for
	167	+ display purposes.
	168	+
	169	+ NOTE: this will be empty if no suitable name is provided
	170	+ by platform or regulator drivers.
	171	+
	172	+
160	173	What: /sys/class/regulator/.../num_users
161	174	Date: April 2008
162	175	KernelVersion: 2.6.26
...	...	@@ -241,6 +241,22 @@
241	241	return sprintf(buf, "%d\n", _regulator_get_current_limit(rdev));
242	242	}
243	243
	244	+static ssize_t regulator_name_show(struct device *dev,
	245	+ struct device_attribute attr, char buf)
	246	+{
	247	+ struct regulator_dev *rdev = dev_get_drvdata(dev);
	248	+ const char *name;
	249	+
	250	+ if (rdev->constraints->name)
	251	+ name = rdev->constraints->name;
	252	+ else if (rdev->desc->name)
	253	+ name = rdev->desc->name;
	254	+ else
	255	+ name = "";
	256	+
	257	+ return sprintf(buf, "%s\n", name);
	258	+}
	259	+
244	260	static ssize_t regulator_opmode_show(struct device *dev,
245	261	struct device_attribute attr, char buf)
246	262	{
247	263
...	...	@@ -473,7 +489,9 @@
473	489	else
474	490	return sprintf(buf, "disabled\n");
475	491	}
	492	+
476	493	static struct device_attribute regulator_dev_attrs[] = {
	494	+ __ATTR(name, 0444, regulator_name_show, NULL),
477	495	__ATTR(microvolts, 0444, regulator_uV_show, NULL),
478	496	__ATTR(microamps, 0444, regulator_uA_show, NULL),
479	497	__ATTR(opmode, 0444, regulator_opmode_show, NULL),