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Date: Sun, 16 Dec 2007 21:29:46 -0500
From: Andres Salomon <dilinger@...ued.net>
To: linux-kernel@...r.kernel.org
Cc: David Woodhouse <dwmw2@...radead.org>, akpm@...ux-foundation.org,
cbou@...l.ru
Subject: [PATCH 5/5] power: convert power_supply static attribs to new API
This allows us to share the uevent callback code w/ the dynamic attrib
stuff.
Signed-off-by: Andres Salomon <dilinger@...ian.org>
---
drivers/power/power_supply_sysfs.c | 50 ++++++++----------------------------
include/linux/power_supply.h | 9 ++++++
2 files changed, 20 insertions(+), 39 deletions(-)
diff --git a/drivers/power/power_supply_sysfs.c b/drivers/power/power_supply_sysfs.c
index 9091c66..7e2c9de 100644
--- a/drivers/power/power_supply_sysfs.c
+++ b/drivers/power/power_supply_sysfs.c
@@ -26,17 +26,16 @@
* (as a macro let's say).
*/
-static ssize_t power_supply_show_static_attrs(struct device *dev,
- struct device_attribute *attr,
- char *buf) {
- static char *type_text[] = { "Battery", "UPS", "Mains", "USB" };
+static ssize_t power_supply_show_type(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
struct power_supply *psy = dev_get_drvdata(dev);
-
- return sprintf(buf, "%s\n", type_text[psy->type]);
+ return power_supply_type_str(psy->type, buf);
}
static struct device_attribute power_supply_static_attrs[] = {
- __ATTR(type, 0444, power_supply_show_static_attrs, NULL),
+ __ATTR(type, S_IRUGO, power_supply_show_type, NULL),
};
int power_supply_create_attrs(struct power_supply *psy)
@@ -187,9 +186,8 @@ static int add_uevent_arg_wrapper(struct power_supply *psy,
int power_supply_uevent(struct device *dev, struct kobj_uevent_env *env)
{
struct power_supply *psy = dev_get_drvdata(dev);
+ struct device_attribute *attr;
int ret = 0, j;
- char *prop_buf;
- char *attrname;
dev_dbg(dev, "uevent\n");
@@ -204,42 +202,18 @@ int power_supply_uevent(struct device *dev, struct kobj_uevent_env *env)
if (ret)
return ret;
- prop_buf = (char *)get_zeroed_page(GFP_KERNEL);
- if (!prop_buf)
- return -ENOMEM;
-
for (j = 0; j < ARRAY_SIZE(power_supply_static_attrs); j++) {
- struct device_attribute *attr;
- char *line;
-
attr = &power_supply_static_attrs[j];
-
- ret = power_supply_show_static_attrs(dev, attr, prop_buf);
+ ret = add_uevent_arg_wrapper(psy, attr, env);
if (ret < 0)
goto out;
-
- line = strchr(prop_buf, '\n');
- if (line)
- *line = 0;
-
- attrname = kstruprdup(attr->attr.name, GFP_KERNEL);
- if (!attrname) {
- ret = -ENOMEM;
- goto out;
- }
-
- dev_dbg(dev, "Static prop %s=%s\n", attrname, prop_buf);
-
- ret = add_uevent_var(env, "POWER_SUPPLY_%s=%s", attrname, prop_buf);
- kfree(attrname);
- if (ret)
- goto out;
}
+ dev_dbg(dev, "%zd static props\n", j);
for (j = 0; psy->props[j]; j++) {
- struct device_attribute *attr = psy->props[j];
-
+ attr = psy->props[j];
ret = add_uevent_arg_wrapper(psy, attr, env);
+
/*
* When a battery is absent, we expect -ENODEV. Don't abort;
* send the uevent with at least the PRESENT=0 property.
@@ -250,7 +224,5 @@ int power_supply_uevent(struct device *dev, struct kobj_uevent_env *env)
dev_dbg(dev, "%zd dynamic props\n", j);
out:
- free_page((unsigned long)prop_buf);
-
return ret;
}
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index e4db02e..2fd6739 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -146,6 +146,15 @@ enum power_supply_type {
POWER_SUPPLY_TYPE_USB,
};
+static inline ssize_t power_supply_type_str(int type, char *buf)
+{
+ static char *type_text[] = { "Battery", "UPS", "Mains", "USB" };
+
+ BUG_ON(type < POWER_SUPPLY_TYPE_BATTERY ||
+ type > POWER_SUPPLY_TYPE_USB);
+ return sprintf(buf, "%s\n", type_text[type]);
+}
+
struct power_supply {
const char *name;
enum power_supply_type type;
--
1.5.3.5
--
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