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Date: Wed, 21 Aug 2013 15:45:02 -0700
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Evgeniy Polyakov <zbr@...emap.net>,
Alexander Stein <alexander.stein@...ormatik.tu-chemnitz.de>
Subject: [PATCH 08/11] w1: slaves: w1_ds28e04: convert to use w1_family_ops.groups
This moves the sysfs file creation/removal to the w1 core by using the
.groups field, saving code in the slave driver.
Cc: Evgeniy Polyakov <zbr@...emap.net>
Cc: Alexander Stein <alexander.stein@...ormatik.tu-chemnitz.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/w1/slaves/w1_ds28e04.c | 112 ++++++++++++++++-------------------------
1 file changed, 42 insertions(+), 70 deletions(-)
diff --git a/drivers/w1/slaves/w1_ds28e04.c b/drivers/w1/slaves/w1_ds28e04.c
index cd30a6d9..365d6dff 100644
--- a/drivers/w1/slaves/w1_ds28e04.c
+++ b/drivers/w1/slaves/w1_ds28e04.c
@@ -118,9 +118,9 @@ static int w1_f1C_read(struct w1_slave *sl, int addr, int len, char *data)
return w1_read_block(sl->master, data, len);
}
-static ssize_t w1_f1C_read_bin(struct file *filp, struct kobject *kobj,
- struct bin_attribute *bin_attr,
- char *buf, loff_t off, size_t count)
+static ssize_t eeprom_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr, char *buf,
+ loff_t off, size_t count)
{
struct w1_slave *sl = kobj_to_w1_slave(kobj);
struct w1_f1C_data *data = sl->family_data;
@@ -226,9 +226,9 @@ static int w1_f1C_write(struct w1_slave *sl, int addr, int len, const u8 *data)
return 0;
}
-static ssize_t w1_f1C_write_bin(struct file *filp, struct kobject *kobj,
- struct bin_attribute *bin_attr,
- char *buf, loff_t off, size_t count)
+static ssize_t eeprom_write(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr, char *buf,
+ loff_t off, size_t count)
{
struct w1_slave *sl = kobj_to_w1_slave(kobj);
@@ -280,9 +280,11 @@ out_up:
return count;
}
-static ssize_t w1_f1C_read_pio(struct file *filp, struct kobject *kobj,
- struct bin_attribute *bin_attr,
- char *buf, loff_t off, size_t count)
+static BIN_ATTR_RW(eeprom, W1_EEPROM_SIZE);
+
+static ssize_t pio_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr, char *buf, loff_t off,
+ size_t count)
{
struct w1_slave *sl = kobj_to_w1_slave(kobj);
@@ -299,9 +301,9 @@ static ssize_t w1_f1C_read_pio(struct file *filp, struct kobject *kobj,
return ret;
}
-static ssize_t w1_f1C_write_pio(struct file *filp, struct kobject *kobj,
- struct bin_attribute *bin_attr,
- char *buf, loff_t off, size_t count)
+static ssize_t pio_write(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr, char *buf, loff_t off,
+ size_t count)
{
struct w1_slave *sl = kobj_to_w1_slave(kobj);
@@ -339,8 +341,10 @@ static ssize_t w1_f1C_write_pio(struct file *filp, struct kobject *kobj,
return count;
}
-static ssize_t w1_f1C_show_crccheck(struct device *dev,
- struct device_attribute *attr, char *buf)
+static BIN_ATTR_RW(pio, 1);
+
+static ssize_t crccheck_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
{
if (put_user(w1_enable_crccheck + 0x30, buf))
return -EFAULT;
@@ -348,9 +352,8 @@ static ssize_t w1_f1C_show_crccheck(struct device *dev,
return sizeof(w1_enable_crccheck);
}
-static ssize_t w1_f1C_store_crccheck(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
+static ssize_t crccheck_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
{
char val;
@@ -371,35 +374,31 @@ static ssize_t w1_f1C_store_crccheck(struct device *dev,
return sizeof(w1_enable_crccheck);
}
-#define NB_SYSFS_BIN_FILES 2
-static struct bin_attribute w1_f1C_bin_attr[NB_SYSFS_BIN_FILES] = {
- {
- .attr = {
- .name = "eeprom",
- .mode = S_IRUGO | S_IWUSR,
- },
- .size = W1_EEPROM_SIZE,
- .read = w1_f1C_read_bin,
- .write = w1_f1C_write_bin,
- },
- {
- .attr = {
- .name = "pio",
- .mode = S_IRUGO | S_IWUSR,
- },
- .size = 1,
- .read = w1_f1C_read_pio,
- .write = w1_f1C_write_pio,
- }
+static DEVICE_ATTR_RW(crccheck);
+
+static struct attribute *w1_f1C_attrs[] = {
+ &dev_attr_crccheck.attr,
+ NULL,
};
-static DEVICE_ATTR(crccheck, S_IWUSR | S_IRUGO,
- w1_f1C_show_crccheck, w1_f1C_store_crccheck);
+static struct bin_attribute *w1_f1C_bin_attrs[] = {
+ &bin_attr_eeprom,
+ &bin_attr_pio,
+ NULL,
+};
+
+static const struct attribute_group w1_f1C_group = {
+ .attrs = w1_f1C_attrs,
+ .bin_attrs = w1_f1C_bin_attrs,
+};
+
+static const struct attribute_group *w1_f1C_groups[] = {
+ &w1_f1C_group,
+ NULL,
+};
static int w1_f1C_add_slave(struct w1_slave *sl)
{
- int err = 0;
- int i;
struct w1_f1C_data *data = NULL;
if (w1_enable_crccheck) {
@@ -409,46 +408,19 @@ static int w1_f1C_add_slave(struct w1_slave *sl)
sl->family_data = data;
}
- /* create binary sysfs attributes */
- for (i = 0; i < NB_SYSFS_BIN_FILES && !err; ++i)
- err = sysfs_create_bin_file(
- &sl->dev.kobj, &(w1_f1C_bin_attr[i]));
-
- if (!err) {
- /* create device attributes */
- err = device_create_file(&sl->dev, &dev_attr_crccheck);
- }
-
- if (err) {
- /* remove binary sysfs attributes */
- for (i = 0; i < NB_SYSFS_BIN_FILES; ++i)
- sysfs_remove_bin_file(
- &sl->dev.kobj, &(w1_f1C_bin_attr[i]));
-
- kfree(data);
- }
-
- return err;
+ return 0;
}
static void w1_f1C_remove_slave(struct w1_slave *sl)
{
- int i;
-
kfree(sl->family_data);
sl->family_data = NULL;
-
- /* remove device attributes */
- device_remove_file(&sl->dev, &dev_attr_crccheck);
-
- /* remove binary sysfs attributes */
- for (i = 0; i < NB_SYSFS_BIN_FILES; ++i)
- sysfs_remove_bin_file(&sl->dev.kobj, &(w1_f1C_bin_attr[i]));
}
static struct w1_family_ops w1_f1C_fops = {
.add_slave = w1_f1C_add_slave,
.remove_slave = w1_f1C_remove_slave,
+ .groups = w1_f1C_groups,
};
static struct w1_family w1_family_1C = {
--
1.8.3.rc0.20.gb99dd2e
--
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