[PATCH 01/11] w1: add attribute groups to struct w1_family_ops

[PATCH 01/11] w1: add attribute groups to struct w1_family_ops

[Greg Kroah-Hartman]

This lets w1 slave drivers declare an attribute group, and not have to
create/destroy sysfs files directly.  All w1 slave drivers will be fixed
to use this field up in follow-on patches to this one.

Cc: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/w1/w1.c        | 73 ++++++++++++++++++++++++++++----------------------
 drivers/w1/w1_family.h |  1 +
 2 files changed, 42 insertions(+), 32 deletions(-)

diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c
index 52b6c2f0..22013ca2 100644
--- a/drivers/w1/w1.c
+++ b/drivers/w1/w1.c
@@ -124,9 +124,9 @@ ATTRIBUTE_GROUPS(w1_slave);
 
 /* Default family */
 
-static ssize_t w1_default_write(struct file *filp, struct kobject *kobj,
-				struct bin_attribute *bin_attr,
-				char *buf, loff_t off, size_t count)
+static ssize_t rw_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);
 
@@ -143,9 +143,9 @@ out_up:
 	return count;
 }
 
-static ssize_t w1_default_read(struct file *filp, struct kobject *kobj,
-			       struct bin_attribute *bin_attr,
-			       char *buf, loff_t off, size_t count)
+static ssize_t rw_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);
 
@@ -155,29 +155,24 @@ static ssize_t w1_default_read(struct file *filp, struct kobject *kobj,
 	return count;
 }
 
-static struct bin_attribute w1_default_attr = {
-      .attr = {
-              .name = "rw",
-              .mode = S_IRUGO | S_IWUSR,
-      },
-      .size = PAGE_SIZE,
-      .read = w1_default_read,
-      .write = w1_default_write,
+static BIN_ATTR_RW(rw, PAGE_SIZE);
+
+static struct bin_attribute *w1_slave_bin_attrs[] = {
+	&bin_attr_rw,
+	NULL,
 };
 
-static int w1_default_add_slave(struct w1_slave *sl)
-{
-	return sysfs_create_bin_file(&sl->dev.kobj, &w1_default_attr);
-}
+static const struct attribute_group w1_slave_default_group = {
+	.bin_attrs = w1_slave_bin_attrs,
+};
 
-static void w1_default_remove_slave(struct w1_slave *sl)
-{
-	sysfs_remove_bin_file(&sl->dev.kobj, &w1_default_attr);
-}
+static const struct attribute_group *w1_slave_default_groups[] = {
+	&w1_slave_default_group,
+	NULL,
+};
 
 static struct w1_family_ops w1_default_fops = {
-	.add_slave	= w1_default_add_slave,
-	.remove_slave	= w1_default_remove_slave,
+	.groups		= w1_slave_default_groups,
 };
 
 static struct w1_family w1_default_family = {
@@ -600,6 +595,7 @@ static int w1_bus_notify(struct notifier_block *nb, unsigned long action,
 {
 	struct device *dev = data;
 	struct w1_slave *sl;
+	struct w1_family_ops *fops;
 	int err;
 
 	/*
@@ -611,23 +607,36 @@ static int w1_bus_notify(struct notifier_block *nb, unsigned long action,
 		return 0;
 
 	sl = dev_to_w1_slave(dev);
+	fops = sl->family->fops;
 
 	switch (action) {
 	case BUS_NOTIFY_ADD_DEVICE:
 		/* if the family driver needs to initialize something... */
-		if (sl->family->fops && sl->family->fops->add_slave &&
-		    ((err = sl->family->fops->add_slave(sl)) < 0)) {
-			dev_err(&sl->dev,
-				"sysfs file creation for [%s] failed. err=%d\n",
-				dev_name(&sl->dev), err);
-			return err;
+		if (fops->add_slave) {
+			err = fops->add_slave(sl);
+			if (err < 0) {
+				dev_err(&sl->dev,
+					"add_slave() call failed. err=%d\n",
+					err);
+				return err;
+			}
+		}
+		if (fops->groups) {
+			err = sysfs_create_groups(&sl->dev.kobj, fops->groups);
+			if (err) {
+				dev_err(&sl->dev,
+					"sysfs group creation failed. err=%d\n",
+					err);
+				return err;
+			}
 		}
 
 		break;
 	case BUS_NOTIFY_DEL_DEVICE:
-		/* Remove our sysfs files */
-		if (sl->family->fops && sl->family->fops->remove_slave)
+		if (fops->remove_slave)
 			sl->family->fops->remove_slave(sl);
+		if (fops->groups)
+			sysfs_remove_groups(&sl->dev.kobj, fops->groups);
 		break;
 	}
 	return 0;
diff --git a/drivers/w1/w1_family.h b/drivers/w1/w1_family.h
index 625dd08f..4ad0e81b 100644
--- a/drivers/w1/w1_family.h
+++ b/drivers/w1/w1_family.h
@@ -52,6 +52,7 @@ struct w1_family_ops
 {
 	int  (* add_slave)(struct w1_slave *);
 	void (* remove_slave)(struct w1_slave *);
+	const struct attribute_group **groups;
 };
 
 struct w1_family
-- 
1.8.3.rc0.20.gb99dd2e

[PATCH 02/11] w1: slaves: w1_therm: convert to use w1_family_ops.groups

[Greg Kroah-Hartman]

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@ioremap.net>
Cc: David Stevenson <david@avoncliff.com>
Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de>
Cc: Michael Arndt <michael@scriptkiller.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/w1/slaves/w1_therm.c | 24 +++++++++---------------
 1 file changed, 9 insertions(+), 15 deletions(-)

diff --git a/drivers/w1/slaves/w1_therm.c b/drivers/w1/slaves/w1_therm.c
index 8978360b..8b5ff33f 100644
--- a/drivers/w1/slaves/w1_therm.c
+++ b/drivers/w1/slaves/w1_therm.c
@@ -59,25 +59,19 @@ static int w1_strong_pullup = 1;
 module_param_named(strong_pullup, w1_strong_pullup, int, 0);
 
 
-static ssize_t w1_therm_read(struct device *device,
+static ssize_t w1_slave_show(struct device *device,
 	struct device_attribute *attr, char *buf);
 
-static struct device_attribute w1_therm_attr =
-	__ATTR(w1_slave, S_IRUGO, w1_therm_read, NULL);
+static DEVICE_ATTR_RO(w1_slave);
 
-static int w1_therm_add_slave(struct w1_slave *sl)
-{
-	return device_create_file(&sl->dev, &w1_therm_attr);
-}
-
-static void w1_therm_remove_slave(struct w1_slave *sl)
-{
-	device_remove_file(&sl->dev, &w1_therm_attr);
-}
+static struct attribute *w1_therm_attrs[] = {
+	&dev_attr_w1_slave.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(w1_therm);
 
 static struct w1_family_ops w1_therm_fops = {
-	.add_slave	= w1_therm_add_slave,
-	.remove_slave	= w1_therm_remove_slave,
+	.groups		= w1_therm_groups,
 };
 
 static struct w1_family w1_therm_family_DS18S20 = {
@@ -178,7 +172,7 @@ static inline int w1_convert_temp(u8 rom[9], u8 fid)
 }
 
 
-static ssize_t w1_therm_read(struct device *device,
+static ssize_t w1_slave_show(struct device *device,
 	struct device_attribute *attr, char *buf)
 {
 	struct w1_slave *sl = dev_to_w1_slave(device);
-- 
1.8.3.rc0.20.gb99dd2e

[PATCH 03/11] w1: slaves: w1_ds2408: convert to use w1_family_ops.groups

[Greg Kroah-Hartman]

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@ioremap.net>
Cc: Jean-Francois Dagenais <jeff.dagenais@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/w1/slaves/w1_ds2408.c | 174 +++++++++++++-----------------------------
 1 file changed, 52 insertions(+), 122 deletions(-)

diff --git a/drivers/w1/slaves/w1_ds2408.c b/drivers/w1/slaves/w1_ds2408.c
index cb8a8e5d..7dfa0e11 100644
--- a/drivers/w1/slaves/w1_ds2408.c
+++ b/drivers/w1/slaves/w1_ds2408.c
@@ -72,10 +72,9 @@ static int _read_reg(struct w1_slave *sl, u8 address, unsigned char* buf)
 	return 1;
 }
 
-static ssize_t w1_f29_read_state(
-	struct file *filp, struct kobject *kobj,
-	struct bin_attribute *bin_attr,
-	char *buf, loff_t off, size_t count)
+static ssize_t state_read(struct file *filp, struct kobject *kobj,
+			  struct bin_attribute *bin_attr, char *buf, loff_t off,
+			  size_t count)
 {
 	dev_dbg(&kobj_to_w1_slave(kobj)->dev,
 		"Reading %s kobj: %p, off: %0#10x, count: %zu, buff addr: %p",
@@ -85,10 +84,9 @@ static ssize_t w1_f29_read_state(
 	return _read_reg(kobj_to_w1_slave(kobj), W1_F29_REG_LOGIG_STATE, buf);
 }
 
-static ssize_t w1_f29_read_output(
-	struct file *filp, struct kobject *kobj,
-	struct bin_attribute *bin_attr,
-	char *buf, loff_t off, size_t count)
+static ssize_t output_read(struct file *filp, struct kobject *kobj,
+			   struct bin_attribute *bin_attr, char *buf,
+			   loff_t off, size_t count)
 {
 	dev_dbg(&kobj_to_w1_slave(kobj)->dev,
 		"Reading %s kobj: %p, off: %0#10x, count: %zu, buff addr: %p",
@@ -99,10 +97,9 @@ static ssize_t w1_f29_read_output(
 					 W1_F29_REG_OUTPUT_LATCH_STATE, buf);
 }
 
-static ssize_t w1_f29_read_activity(
-	struct file *filp, struct kobject *kobj,
-	struct bin_attribute *bin_attr,
-	char *buf, loff_t off, size_t count)
+static ssize_t activity_read(struct file *filp, struct kobject *kobj,
+			     struct bin_attribute *bin_attr, char *buf,
+			     loff_t off, size_t count)
 {
 	dev_dbg(&kobj_to_w1_slave(kobj)->dev,
 		"Reading %s kobj: %p, off: %0#10x, count: %zu, buff addr: %p",
@@ -113,10 +110,9 @@ static ssize_t w1_f29_read_activity(
 					 W1_F29_REG_ACTIVITY_LATCH_STATE, buf);
 }
 
-static ssize_t w1_f29_read_cond_search_mask(
-	struct file *filp, struct kobject *kobj,
-	struct bin_attribute *bin_attr,
-	char *buf, loff_t off, size_t count)
+static ssize_t cond_search_mask_read(struct file *filp, struct kobject *kobj,
+				     struct bin_attribute *bin_attr, char *buf,
+				     loff_t off, size_t count)
 {
 	dev_dbg(&kobj_to_w1_slave(kobj)->dev,
 		"Reading %s kobj: %p, off: %0#10x, count: %zu, buff addr: %p",
@@ -127,10 +123,10 @@ static ssize_t w1_f29_read_cond_search_mask(
 		W1_F29_REG_COND_SEARCH_SELECT_MASK, buf);
 }
 
-static ssize_t w1_f29_read_cond_search_polarity(
-	struct file *filp, struct kobject *kobj,
-	struct bin_attribute *bin_attr,
-	char *buf, loff_t off, size_t count)
+static ssize_t cond_search_polarity_read(struct file *filp,
+					 struct kobject *kobj,
+					 struct bin_attribute *bin_attr,
+					 char *buf, loff_t off, size_t count)
 {
 	if (count != 1 || off != 0)
 		return -EFAULT;
@@ -138,10 +134,9 @@ static ssize_t w1_f29_read_cond_search_polarity(
 		W1_F29_REG_COND_SEARCH_POL_SELECT, buf);
 }
 
-static ssize_t w1_f29_read_status_control(
-	struct file *filp, struct kobject *kobj,
-	struct bin_attribute *bin_attr,
-	char *buf, loff_t off, size_t count)
+static ssize_t status_control_read(struct file *filp, struct kobject *kobj,
+				   struct bin_attribute *bin_attr, char *buf,
+				   loff_t off, size_t count)
 {
 	if (count != 1 || off != 0)
 		return -EFAULT;
@@ -149,13 +144,9 @@ static ssize_t w1_f29_read_status_control(
 		W1_F29_REG_CONTROL_AND_STATUS, buf);
 }
 
-
-
-
-static ssize_t w1_f29_write_output(
-	struct file *filp, struct kobject *kobj,
-	struct bin_attribute *bin_attr,
-	char *buf, loff_t off, size_t count)
+static ssize_t output_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);
 	u8 w1_buf[3];
@@ -224,10 +215,9 @@ error:
 /**
  * Writing to the activity file resets the activity latches.
  */
-static ssize_t w1_f29_write_activity(
-	struct file *filp, struct kobject *kobj,
-	struct bin_attribute *bin_attr,
-	char *buf, loff_t off, size_t count)
+static ssize_t activity_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);
 	unsigned int retries = W1_F29_RETRIES;
@@ -255,13 +245,9 @@ error:
 	return -EIO;
 }
 
-static ssize_t w1_f29_write_status_control(
-	struct file *filp,
-	struct kobject *kobj,
-	struct bin_attribute *bin_attr,
-	char *buf,
-	loff_t off,
-	size_t count)
+static ssize_t status_control_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);
 	u8 w1_buf[4];
@@ -330,91 +316,35 @@ out:
 	return res;
 }
 
-static struct bin_attribute w1_f29_sysfs_bin_files[] = {
-	{
-		.attr =	{
-			.name = "state",
-			.mode = S_IRUGO,
-		},
-		.size = 1,
-		.read = w1_f29_read_state,
-	},
-	{
-		.attr =	{
-			.name = "output",
-			.mode = S_IRUGO | S_IWUSR | S_IWGRP,
-		},
-		.size = 1,
-		.read = w1_f29_read_output,
-		.write = w1_f29_write_output,
-	},
-	{
-		.attr =	{
-			.name = "activity",
-			.mode = S_IRUGO,
-		},
-		.size = 1,
-		.read = w1_f29_read_activity,
-		.write = w1_f29_write_activity,
-	},
-	{
-		.attr =	{
-			.name = "cond_search_mask",
-			.mode = S_IRUGO,
-		},
-		.size = 1,
-		.read = w1_f29_read_cond_search_mask,
-	},
-	{
-		.attr =	{
-			.name = "cond_search_polarity",
-			.mode = S_IRUGO,
-		},
-		.size = 1,
-		.read = w1_f29_read_cond_search_polarity,
-	},
-	{
-		.attr =	{
-			.name = "status_control",
-			.mode = S_IRUGO | S_IWUSR | S_IWGRP,
-		},
-		.size = 1,
-		.read = w1_f29_read_status_control,
-		.write = w1_f29_write_status_control,
-	}
+static BIN_ATTR_RO(state, 1);
+static BIN_ATTR_RW(output, 1);
+static BIN_ATTR_RW(activity, 1);
+static BIN_ATTR_RO(cond_search_mask, 1);
+static BIN_ATTR_RO(cond_search_polarity, 1);
+static BIN_ATTR_RW(status_control, 1);
+
+static struct bin_attribute *w1_f29_bin_attrs[] = {
+	&bin_attr_state,
+	&bin_attr_output,
+	&bin_attr_activity,
+	&bin_attr_cond_search_mask,
+	&bin_attr_cond_search_polarity,
+	&bin_attr_status_control,
+	NULL,
 };
 
-static int w1_f29_add_slave(struct w1_slave *sl)
-{
-	int err = 0;
-	int i;
-
-	err = w1_f29_disable_test_mode(sl);
-	if (err)
-		return err;
-
-	for (i = 0; i < ARRAY_SIZE(w1_f29_sysfs_bin_files) && !err; ++i)
-		err = sysfs_create_bin_file(
-			&sl->dev.kobj,
-			&(w1_f29_sysfs_bin_files[i]));
-	if (err)
-		while (--i >= 0)
-			sysfs_remove_bin_file(&sl->dev.kobj,
-				&(w1_f29_sysfs_bin_files[i]));
-	return err;
-}
+static const struct attribute_group w1_f29_group = {
+	.bin_attrs = w1_f29_bin_attrs,
+};
 
-static void w1_f29_remove_slave(struct w1_slave *sl)
-{
-	int i;
-	for (i = ARRAY_SIZE(w1_f29_sysfs_bin_files) - 1; i >= 0; --i)
-		sysfs_remove_bin_file(&sl->dev.kobj,
-			&(w1_f29_sysfs_bin_files[i]));
-}
+static const struct attribute_group *w1_f29_groups[] = {
+	&w1_f29_group,
+	NULL,
+};
 
 static struct w1_family_ops w1_f29_fops = {
-	.add_slave      = w1_f29_add_slave,
-	.remove_slave   = w1_f29_remove_slave,
+	.add_slave      = w1_f29_disable_test_mode,
+	.groups		= w1_f29_groups,
 };
 
 static struct w1_family w1_family_29 = {
-- 
1.8.3.rc0.20.gb99dd2e

[PATCH 04/11] w1: slaves: w1_ds2413.c: convert to use w1_family_ops.groups

[Greg Kroah-Hartman]

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@ioremap.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de>
Cc: Mariusz Bialonczyk <manio@skyboo.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/w1/slaves/w1_ds2413.c | 72 +++++++++++++------------------------------
 1 file changed, 22 insertions(+), 50 deletions(-)

diff --git a/drivers/w1/slaves/w1_ds2413.c b/drivers/w1/slaves/w1_ds2413.c
index 85937773..ee28fc1f 100644
--- a/drivers/w1/slaves/w1_ds2413.c
+++ b/drivers/w1/slaves/w1_ds2413.c
@@ -30,10 +30,9 @@ MODULE_ALIAS("w1-family-" __stringify(W1_FAMILY_DS2413));
 #define W1_F3A_FUNC_PIO_ACCESS_WRITE       0x5A
 #define W1_F3A_SUCCESS_CONFIRM_BYTE        0xAA
 
-static ssize_t w1_f3a_read_state(
-	struct file *filp, struct kobject *kobj,
-	struct bin_attribute *bin_attr,
-	char *buf, loff_t off, size_t count)
+static ssize_t state_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);
 	dev_dbg(&sl->dev,
@@ -66,10 +65,11 @@ static ssize_t w1_f3a_read_state(
 		return 1;
 }
 
-static ssize_t w1_f3a_write_output(
-	struct file *filp, struct kobject *kobj,
-	struct bin_attribute *bin_attr,
-	char *buf, loff_t off, size_t count)
+static BIN_ATTR_RO(state, 1);
+
+static ssize_t output_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);
 	u8 w1_buf[3];
@@ -110,53 +110,25 @@ error:
 	return -EIO;
 }
 
-#define NB_SYSFS_BIN_FILES 2
-static struct bin_attribute w1_f3a_sysfs_bin_files[NB_SYSFS_BIN_FILES] = {
-	{
-		.attr = {
-			.name = "state",
-			.mode = S_IRUGO,
-		},
-		.size = 1,
-		.read = w1_f3a_read_state,
-	},
-	{
-		.attr = {
-			.name = "output",
-			.mode = S_IRUGO | S_IWUSR | S_IWGRP,
-		},
-		.size = 1,
-		.write = w1_f3a_write_output,
-	}
+static BIN_ATTR(output, S_IRUGO | S_IWUSR | S_IWGRP, NULL, output_write, 1);
+
+static struct bin_attribute *w1_f3a_bin_attrs[] = {
+	&bin_attr_state,
+	&bin_attr_output,
+	NULL,
 };
 
-static int w1_f3a_add_slave(struct w1_slave *sl)
-{
-	int err = 0;
-	int i;
-
-	for (i = 0; i < NB_SYSFS_BIN_FILES && !err; ++i)
-		err = sysfs_create_bin_file(
-			&sl->dev.kobj,
-			&(w1_f3a_sysfs_bin_files[i]));
-	if (err)
-		while (--i >= 0)
-			sysfs_remove_bin_file(&sl->dev.kobj,
-				&(w1_f3a_sysfs_bin_files[i]));
-	return err;
-}
+static const struct attribute_group w1_f3a_group = {
+	.bin_attrs = w1_f3a_bin_attrs,
+};
 
-static void w1_f3a_remove_slave(struct w1_slave *sl)
-{
-	int i;
-	for (i = NB_SYSFS_BIN_FILES - 1; i >= 0; --i)
-		sysfs_remove_bin_file(&sl->dev.kobj,
-			&(w1_f3a_sysfs_bin_files[i]));
-}
+static const struct attribute_group *w1_f3a_groups[] = {
+	&w1_f3a_group,
+	NULL,
+};
 
 static struct w1_family_ops w1_f3a_fops = {
-	.add_slave      = w1_f3a_add_slave,
-	.remove_slave   = w1_f3a_remove_slave,
+	.groups		= w1_f3a_groups,
 };
 
 static struct w1_family w1_family_3a = {
-- 
1.8.3.rc0.20.gb99dd2e

[PATCH 05/11] w1: slaves: w1_ds2423: convert to use w1_family_ops.groups

[Greg Kroah-Hartman]

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@ioremap.net>
Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/w1/slaves/w1_ds2423.c | 27 +++++++++------------------
 1 file changed, 9 insertions(+), 18 deletions(-)

diff --git a/drivers/w1/slaves/w1_ds2423.c b/drivers/w1/slaves/w1_ds2423.c
index 7f86aec7..7e41b7d9 100644
--- a/drivers/w1/slaves/w1_ds2423.c
+++ b/drivers/w1/slaves/w1_ds2423.c
@@ -40,14 +40,8 @@
 #define COUNTER_COUNT 4
 #define READ_BYTE_COUNT 42
 
-static ssize_t w1_counter_read(struct device *device,
-	struct device_attribute *attr, char *buf);
-
-static struct device_attribute w1_counter_attr =
-	__ATTR(w1_slave, S_IRUGO, w1_counter_read, NULL);
-
-static ssize_t w1_counter_read(struct device *device,
-	struct device_attribute *attr, char *out_buf)
+static ssize_t w1_slave_show(struct device *device,
+			     struct device_attribute *attr, char *out_buf)
 {
 	struct w1_slave *sl = dev_to_w1_slave(device);
 	struct w1_master *dev = sl->master;
@@ -128,19 +122,16 @@ static ssize_t w1_counter_read(struct device *device,
 	return PAGE_SIZE - c;
 }
 
-static int w1_f1d_add_slave(struct w1_slave *sl)
-{
-	return device_create_file(&sl->dev, &w1_counter_attr);
-}
+static DEVICE_ATTR_RO(w1_slave);
 
-static void w1_f1d_remove_slave(struct w1_slave *sl)
-{
-	device_remove_file(&sl->dev, &w1_counter_attr);
-}
+static struct attribute *w1_f1d_attrs[] = {
+	&dev_attr_w1_slave.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(w1_f1d);
 
 static struct w1_family_ops w1_f1d_fops = {
-	.add_slave      = w1_f1d_add_slave,
-	.remove_slave   = w1_f1d_remove_slave,
+	.groups		= w1_f1d_groups,
 };
 
 static struct w1_family w1_family_1d = {
-- 
1.8.3.rc0.20.gb99dd2e

[PATCH 06/11] w1: slaves: w1_ds2431: convert to use w1_family_ops.groups

[Greg Kroah-Hartman]

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@ioremap.net>
Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/w1/slaves/w1_ds2431.c | 43 +++++++++++++++++++------------------------
 1 file changed, 19 insertions(+), 24 deletions(-)

diff --git a/drivers/w1/slaves/w1_ds2431.c b/drivers/w1/slaves/w1_ds2431.c
index cef8605e..9c4ff9d2 100644
--- a/drivers/w1/slaves/w1_ds2431.c
+++ b/drivers/w1/slaves/w1_ds2431.c
@@ -96,9 +96,9 @@ static int w1_f2d_readblock(struct w1_slave *sl, int off, int count, char *buf)
 	return -1;
 }
 
-static ssize_t w1_f2d_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);
 	int todo = count;
@@ -202,9 +202,9 @@ retry:
 	return 0;
 }
 
-static ssize_t w1_f2d_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);
 	int addr, len;
@@ -264,29 +264,24 @@ out_up:
 	return count;
 }
 
-static struct bin_attribute w1_f2d_bin_attr = {
-	.attr = {
-		.name = "eeprom",
-		.mode = S_IRUGO | S_IWUSR,
-	},
-	.size = W1_F2D_EEPROM_SIZE,
-	.read = w1_f2d_read_bin,
-	.write = w1_f2d_write_bin,
+static BIN_ATTR_RW(eeprom, W1_F2D_EEPROM_SIZE);
+
+static struct bin_attribute *w1_f2d_bin_attrs[] = {
+	&bin_attr_eeprom,
+	NULL,
 };
 
-static int w1_f2d_add_slave(struct w1_slave *sl)
-{
-	return sysfs_create_bin_file(&sl->dev.kobj, &w1_f2d_bin_attr);
-}
+static const struct attribute_group w1_f2d_group = {
+	.bin_attrs = w1_f2d_bin_attrs,
+};
 
-static void w1_f2d_remove_slave(struct w1_slave *sl)
-{
-	sysfs_remove_bin_file(&sl->dev.kobj, &w1_f2d_bin_attr);
-}
+static const struct attribute_group *w1_f2d_groups[] = {
+	&w1_f2d_group,
+	NULL,
+};
 
 static struct w1_family_ops w1_f2d_fops = {
-	.add_slave      = w1_f2d_add_slave,
-	.remove_slave   = w1_f2d_remove_slave,
+	.groups		= w1_f2d_groups,
 };
 
 static struct w1_family w1_family_2d = {
-- 
1.8.3.rc0.20.gb99dd2e

[PATCH 07/11] w1: slaves: w1_ds2433: convert to use w1_family_ops.groups

[Greg Kroah-Hartman]

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@ioremap.net>
Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/w1/slaves/w1_ds2433.c | 47 ++++++++++++++++++++-----------------------
 1 file changed, 22 insertions(+), 25 deletions(-)

diff --git a/drivers/w1/slaves/w1_ds2433.c b/drivers/w1/slaves/w1_ds2433.c
index 10cc1b61..72319a96 100644
--- a/drivers/w1/slaves/w1_ds2433.c
+++ b/drivers/w1/slaves/w1_ds2433.c
@@ -93,9 +93,9 @@ static int w1_f23_refresh_block(struct w1_slave *sl, struct w1_f23_data *data,
 }
 #endif	/* CONFIG_W1_SLAVE_DS2433_CRC */
 
-static ssize_t w1_f23_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);
 #ifdef CONFIG_W1_SLAVE_DS2433_CRC
@@ -207,9 +207,9 @@ static int w1_f23_write(struct w1_slave *sl, int addr, int len, const u8 *data)
 	return 0;
 }
 
-static ssize_t w1_f23_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);
 	int addr, len, idx;
@@ -257,19 +257,24 @@ out_up:
 	return count;
 }
 
-static struct bin_attribute w1_f23_bin_attr = {
-	.attr = {
-		.name = "eeprom",
-		.mode = S_IRUGO | S_IWUSR,
-	},
-	.size = W1_EEPROM_SIZE,
-	.read = w1_f23_read_bin,
-	.write = w1_f23_write_bin,
+static BIN_ATTR_RW(eeprom, W1_EEPROM_SIZE);
+
+static struct bin_attribute *w1_f23_bin_attributes[] = {
+	&bin_attr_eeprom,
+	NULL,
+};
+
+static const struct attribute_group w1_f23_group = {
+	.bin_attrs = w1_f23_bin_attributes,
+};
+
+static const struct attribute_group *w1_f23_groups[] = {
+	&w1_f23_group,
+	NULL,
 };
 
 static int w1_f23_add_slave(struct w1_slave *sl)
 {
-	int err;
 #ifdef CONFIG_W1_SLAVE_DS2433_CRC
 	struct w1_f23_data *data;
 
@@ -279,15 +284,7 @@ static int w1_f23_add_slave(struct w1_slave *sl)
 	sl->family_data = data;
 
 #endif	/* CONFIG_W1_SLAVE_DS2433_CRC */
-
-	err = sysfs_create_bin_file(&sl->dev.kobj, &w1_f23_bin_attr);
-
-#ifdef CONFIG_W1_SLAVE_DS2433_CRC
-	if (err)
-		kfree(data);
-#endif	/* CONFIG_W1_SLAVE_DS2433_CRC */
-
-	return err;
+	return 0;
 }
 
 static void w1_f23_remove_slave(struct w1_slave *sl)
@@ -296,12 +293,12 @@ static void w1_f23_remove_slave(struct w1_slave *sl)
 	kfree(sl->family_data);
 	sl->family_data = NULL;
 #endif	/* CONFIG_W1_SLAVE_DS2433_CRC */
-	sysfs_remove_bin_file(&sl->dev.kobj, &w1_f23_bin_attr);
 }
 
 static struct w1_family_ops w1_f23_fops = {
 	.add_slave      = w1_f23_add_slave,
 	.remove_slave   = w1_f23_remove_slave,
+	.groups		= w1_f23_groups,
 };
 
 static struct w1_family w1_family_23 = {
-- 
1.8.3.rc0.20.gb99dd2e

[PATCH 08/11] w1: slaves: w1_ds28e04: convert to use w1_family_ops.groups

[Greg Kroah-Hartman]

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@ioremap.net>
Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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

[PATCH 09/11] w1: slaves: w1_ds2780: convert to use w1_family_ops.groups

[Greg Kroah-Hartman]

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@ioremap.net>
Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/w1/slaves/w1_ds2780.c | 36 ++++++++++++++++++------------------
 1 file changed, 18 insertions(+), 18 deletions(-)

diff --git a/drivers/w1/slaves/w1_ds2780.c b/drivers/w1/slaves/w1_ds2780.c
index 0cd7a27b..50e85f79 100644
--- a/drivers/w1/slaves/w1_ds2780.c
+++ b/drivers/w1/slaves/w1_ds2780.c
@@ -89,22 +89,28 @@ int w1_ds2780_eeprom_cmd(struct device *dev, int addr, int cmd)
 }
 EXPORT_SYMBOL(w1_ds2780_eeprom_cmd);
 
-static ssize_t w1_ds2780_read_bin(struct file *filp,
-				  struct kobject *kobj,
-				  struct bin_attribute *bin_attr,
-				  char *buf, loff_t off, size_t count)
+static ssize_t w1_slave_read(struct file *filp, struct kobject *kobj,
+			     struct bin_attribute *bin_attr, char *buf,
+			     loff_t off, size_t count)
 {
 	struct device *dev = container_of(kobj, struct device, kobj);
 	return w1_ds2780_io(dev, buf, off, count, 0);
 }
 
-static struct bin_attribute w1_ds2780_bin_attr = {
-	.attr = {
-		.name = "w1_slave",
-		.mode = S_IRUGO,
-	},
-	.size = DS2780_DATA_SIZE,
-	.read = w1_ds2780_read_bin,
+static BIN_ATTR_RO(w1_slave, DS2780_DATA_SIZE);
+
+static struct bin_attribute *w1_ds2780_bin_attrs[] = {
+	&bin_attr_w1_slave,
+	NULL,
+};
+
+static const struct attribute_group w1_ds2780_group = {
+	.bin_attrs = w1_ds2780_bin_attrs,
+};
+
+static const struct attribute_group *w1_ds2780_groups[] = {
+	&w1_ds2780_group,
+	NULL,
 };
 
 static DEFINE_IDA(bat_ida);
@@ -132,16 +138,10 @@ static int w1_ds2780_add_slave(struct w1_slave *sl)
 	if (ret)
 		goto pdev_add_failed;
 
-	ret = sysfs_create_bin_file(&sl->dev.kobj, &w1_ds2780_bin_attr);
-	if (ret)
-		goto bin_attr_failed;
-
 	dev_set_drvdata(&sl->dev, pdev);
 
 	return 0;
 
-bin_attr_failed:
-	platform_device_del(pdev);
 pdev_add_failed:
 	platform_device_put(pdev);
 pdev_alloc_failed:
@@ -157,12 +157,12 @@ static void w1_ds2780_remove_slave(struct w1_slave *sl)
 
 	platform_device_unregister(pdev);
 	ida_simple_remove(&bat_ida, id);
-	sysfs_remove_bin_file(&sl->dev.kobj, &w1_ds2780_bin_attr);
 }
 
 static struct w1_family_ops w1_ds2780_fops = {
 	.add_slave    = w1_ds2780_add_slave,
 	.remove_slave = w1_ds2780_remove_slave,
+	.groups       = w1_ds2780_groups,
 };
 
 static struct w1_family w1_ds2780_family = {
-- 
1.8.3.rc0.20.gb99dd2e

[PATCH 10/11] w1: slaves: w1_ds2760: convert to use w1_family_ops.groups

[Greg Kroah-Hartman]

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@ioremap.net>
Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/w1/slaves/w1_ds2760.c | 35 ++++++++++++++++++-----------------
 1 file changed, 18 insertions(+), 17 deletions(-)

diff --git a/drivers/w1/slaves/w1_ds2760.c b/drivers/w1/slaves/w1_ds2760.c
index 93719d25..65f90dcc 100644
--- a/drivers/w1/slaves/w1_ds2760.c
+++ b/drivers/w1/slaves/w1_ds2760.c
@@ -97,21 +97,28 @@ int w1_ds2760_recall_eeprom(struct device *dev, int addr)
 	return w1_ds2760_eeprom_cmd(dev, addr, W1_DS2760_RECALL_DATA);
 }
 
-static ssize_t w1_ds2760_read_bin(struct file *filp, struct kobject *kobj,
-				  struct bin_attribute *bin_attr,
-				  char *buf, loff_t off, size_t count)
+static ssize_t w1_slave_read(struct file *filp, struct kobject *kobj,
+			     struct bin_attribute *bin_attr, char *buf,
+			     loff_t off, size_t count)
 {
 	struct device *dev = container_of(kobj, struct device, kobj);
 	return w1_ds2760_read(dev, buf, off, count);
 }
 
-static struct bin_attribute w1_ds2760_bin_attr = {
-	.attr = {
-		.name = "w1_slave",
-		.mode = S_IRUGO,
-	},
-	.size = DS2760_DATA_SIZE,
-	.read = w1_ds2760_read_bin,
+static BIN_ATTR_RO(w1_slave, DS2760_DATA_SIZE);
+
+static struct bin_attribute *w1_ds2760_bin_attrs[] = {
+	&bin_attr_w1_slave,
+	NULL,
+};
+
+static const struct attribute_group w1_ds2760_group = {
+	.bin_attrs = w1_ds2760_bin_attrs,
+};
+
+static const struct attribute_group *w1_ds2760_groups[] = {
+	&w1_ds2760_group,
+	NULL,
 };
 
 static DEFINE_IDA(bat_ida);
@@ -139,16 +146,10 @@ static int w1_ds2760_add_slave(struct w1_slave *sl)
 	if (ret)
 		goto pdev_add_failed;
 
-	ret = sysfs_create_bin_file(&sl->dev.kobj, &w1_ds2760_bin_attr);
-	if (ret)
-		goto bin_attr_failed;
-
 	dev_set_drvdata(&sl->dev, pdev);
 
 	goto success;
 
-bin_attr_failed:
-	platform_device_del(pdev);
 pdev_add_failed:
 	platform_device_put(pdev);
 pdev_alloc_failed:
@@ -165,12 +166,12 @@ static void w1_ds2760_remove_slave(struct w1_slave *sl)
 
 	platform_device_unregister(pdev);
 	ida_simple_remove(&bat_ida, id);
-	sysfs_remove_bin_file(&sl->dev.kobj, &w1_ds2760_bin_attr);
 }
 
 static struct w1_family_ops w1_ds2760_fops = {
 	.add_slave    = w1_ds2760_add_slave,
 	.remove_slave = w1_ds2760_remove_slave,
+	.groups       = w1_ds2760_groups,
 };
 
 static struct w1_family w1_ds2760_family = {
-- 
1.8.3.rc0.20.gb99dd2e

[PATCH 11/11] w1: slaves: w1_ds2781: convert to use w1_family_ops.groups

[Greg Kroah-Hartman]

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@ioremap.net>
Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/w1/slaves/w1_ds2781.c | 36 ++++++++++++++++++------------------
 1 file changed, 18 insertions(+), 18 deletions(-)

diff --git a/drivers/w1/slaves/w1_ds2781.c b/drivers/w1/slaves/w1_ds2781.c
index 1aba8e41..1eb98fb1 100644
--- a/drivers/w1/slaves/w1_ds2781.c
+++ b/drivers/w1/slaves/w1_ds2781.c
@@ -87,22 +87,28 @@ int w1_ds2781_eeprom_cmd(struct device *dev, int addr, int cmd)
 }
 EXPORT_SYMBOL(w1_ds2781_eeprom_cmd);
 
-static ssize_t w1_ds2781_read_bin(struct file *filp,
-				  struct kobject *kobj,
-				  struct bin_attribute *bin_attr,
-				  char *buf, loff_t off, size_t count)
+static ssize_t w1_slave_read(struct file *filp, struct kobject *kobj,
+			     struct bin_attribute *bin_attr, char *buf,
+			     loff_t off, size_t count)
 {
 	struct device *dev = container_of(kobj, struct device, kobj);
 	return w1_ds2781_io(dev, buf, off, count, 0);
 }
 
-static struct bin_attribute w1_ds2781_bin_attr = {
-	.attr = {
-		.name = "w1_slave",
-		.mode = S_IRUGO,
-	},
-	.size = DS2781_DATA_SIZE,
-	.read = w1_ds2781_read_bin,
+static BIN_ATTR_RO(w1_slave, DS2781_DATA_SIZE);
+
+static struct bin_attribute *w1_ds2781_bin_attrs[] = {
+	&bin_attr_w1_slave,
+	NULL,
+};
+
+static const struct attribute_group w1_ds2781_group = {
+	.bin_attrs = w1_ds2781_bin_attrs,
+};
+
+static const struct attribute_group *w1_ds2781_groups[] = {
+	&w1_ds2781_group,
+	NULL,
 };
 
 static DEFINE_IDA(bat_ida);
@@ -130,16 +136,10 @@ static int w1_ds2781_add_slave(struct w1_slave *sl)
 	if (ret)
 		goto pdev_add_failed;
 
-	ret = sysfs_create_bin_file(&sl->dev.kobj, &w1_ds2781_bin_attr);
-	if (ret)
-		goto bin_attr_failed;
-
 	dev_set_drvdata(&sl->dev, pdev);
 
 	return 0;
 
-bin_attr_failed:
-	platform_device_del(pdev);
 pdev_add_failed:
 	platform_device_put(pdev);
 pdev_alloc_failed:
@@ -155,12 +155,12 @@ static void w1_ds2781_remove_slave(struct w1_slave *sl)
 
 	platform_device_unregister(pdev);
 	ida_simple_remove(&bat_ida, id);
-	sysfs_remove_bin_file(&sl->dev.kobj, &w1_ds2781_bin_attr);
 }
 
 static struct w1_family_ops w1_ds2781_fops = {
 	.add_slave    = w1_ds2781_add_slave,
 	.remove_slave = w1_ds2781_remove_slave,
+	.groups       = w1_ds2781_groups,
 };
 
 static struct w1_family w1_ds2781_family = {
-- 
1.8.3.rc0.20.gb99dd2e

Re: [PATCH 01/11] w1: add attribute groups to struct w1_family_ops

[Рустафа Джамурахметов]

Hi

22.08.2013, 02:45, "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>:
> This lets w1 slave drivers declare an attribute group, and not have to
> create/destroy sysfs files directly.  All w1 slave drivers will be fixed
> to use this field up in follow-on patches to this one.

Sounds reasonble, saves fair amount of code in w1 drivers

> Cc: Evgeniy Polyakov <zbr@ioremap.net>
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Acked-core-and-particular-w1-drivers-by: Evgeniy Polyakov <zbr@ioremap.net>

Re: [PATCH 01/11] w1: add attribute groups to struct w1_family_ops

[Greg Kroah-Hartman]

On Thu, Aug 22, 2013 at 04:05:04AM +0400, Рустафа Джамурахметов wrote:
> Hi
> 
> 22.08.2013, 02:45, "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>:
> > This lets w1 slave drivers declare an attribute group, and not have to
> > create/destroy sysfs files directly.  All w1 slave drivers will be fixed
> > to use this field up in follow-on patches to this one.
> 
> Sounds reasonble, saves fair amount of code in w1 drivers

Thanks for reviewing it.

greg k-h