linux-kernel - [PATCH] ALSA: soundbus: Remove direct OF name and type accesses

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Date:   Wed,  5 Dec 2018 13:50:48 -0600
From:   Rob Herring <robh@...nel.org>
To:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Johannes Berg <johannes@...solutions.net>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, linuxppc-dev@...ts.ozlabs.org,
        alsa-devel@...a-project.org
Subject: [PATCH] ALSA: soundbus: Remove direct OF name and type accesses

Convert soundbus uevent and sysfs OF node name and device type usage to
use printf specifier and helper functions instead of directly accessing
the name and type pointers. This will allow the eventual removal of the
pointers.

Cc: Johannes Berg <johannes@...solutions.net>
Cc: Jaroslav Kysela <perex@...ex.cz>
Cc: Takashi Iwai <tiwai@...e.com>
Cc: linuxppc-dev@...ts.ozlabs.org
Cc: alsa-devel@...a-project.org
Signed-off-by: Rob Herring <robh@...nel.org>
---
 sound/aoa/soundbus/core.c  |  2 +-
 sound/aoa/soundbus/sysfs.c | 34 +++++++++++++++++++++-------------
 2 files changed, 22 insertions(+), 14 deletions(-)

diff --git a/sound/aoa/soundbus/core.c b/sound/aoa/soundbus/core.c
index f3076a3f7f2f..065d3a55725e 100644
--- a/sound/aoa/soundbus/core.c
+++ b/sound/aoa/soundbus/core.c
@@ -74,7 +74,7 @@ static int soundbus_uevent(struct device *dev, struct kobj_uevent_env *env)
 	of = &soundbus_dev->ofdev;
 
 	/* stuff we want to pass to /sbin/hotplug */
-	retval = add_uevent_var(env, "OF_NAME=%s", of->dev.of_node->name);
+	retval = add_uevent_var(env, "OF_NAME=%pOFn", of->dev.of_node);
 	if (retval)
 		return retval;
 
diff --git a/sound/aoa/soundbus/sysfs.c b/sound/aoa/soundbus/sysfs.c
index 81da020bddef..a2d55e15afbb 100644
--- a/sound/aoa/soundbus/sysfs.c
+++ b/sound/aoa/soundbus/sysfs.c
@@ -1,18 +1,10 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <linux/kernel.h>
+#include <linux/of.h>
 #include <linux/stat.h>
 /* FIX UP */
 #include "soundbus.h"
 
-#define soundbus_config_of_attr(field, format_string)			\
-static ssize_t								\
-field##_show (struct device *dev, struct device_attribute *attr,	\
-              char *buf)						\
-{									\
-	struct soundbus_dev *mdev = to_soundbus_device (dev);		\
-	return sprintf (buf, format_string, mdev->ofdev.dev.of_node->field); \
-}
-
 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
 			     char *buf)
 {
@@ -25,17 +17,33 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
 		strcat(buf, "\n");
 		length = strlen(buf);
 	} else {
-		length = sprintf(buf, "of:N%sT%s\n",
-				 of->dev.of_node->name, of->dev.of_node->type);
+		length = sprintf(buf, "of:N%pOFn%c%s\n",
+				 of->dev.of_node, 'T',
+                                 of_node_get_device_type(of->dev.of_node));
 	}
 
 	return length;
 }
 static DEVICE_ATTR_RO(modalias);
 
-soundbus_config_of_attr (name, "%s\n");
+static ssize_t name_show(struct device *dev,
+			 struct device_attribute *attr, char *buf)
+{
+	struct soundbus_dev *sdev = to_soundbus_device(dev);
+	struct platform_device *of = &sdev->ofdev;
+
+	return sprintf(buf, "%pOFn\n", of->dev.of_node);
+}
 static DEVICE_ATTR_RO(name);
-soundbus_config_of_attr (type, "%s\n");
+
+static ssize_t type_show(struct device *dev,
+			 struct device_attribute *attr, char *buf)
+{
+	struct soundbus_dev *sdev = to_soundbus_device(dev);
+	struct platform_device *of = &sdev->ofdev;
+
+	return sprintf(buf, "%s\n", of_node_get_device_type(of->dev.of_node));
+}
 static DEVICE_ATTR_RO(type);
 
 struct attribute *soundbus_dev_attrs[] = {
-- 
2.19.1