linux-kernel - [PATCH 02/11] w1: slaves: w1_therm: convert to use w1_family

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Date:	Wed, 21 Aug 2013 15:44:56 -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>,
	David Stevenson <david@...ncliff.com>,
	Alexander Stein <alexander.stein@...ormatik.tu-chemnitz.de>,
	Michael Arndt <michael@...iptkiller.de>
Subject: [PATCH 02/11] w1: slaves: w1_therm: 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: David Stevenson <david@...ncliff.com>
Cc: Alexander Stein <alexander.stein@...ormatik.tu-chemnitz.de>
Cc: Michael Arndt <michael@...iptkiller.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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

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