ieee802154: introduce sysfs file
This patch moves the sysfs handling in a own file. This is like wireless
sysfs file handling.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/ieee802154/sysfs.c b/net/ieee802154/sysfs.c
new file mode 100644
index 0000000..eb9ca6f9
--- /dev/null
+++ b/net/ieee802154/sysfs.c
@@ -0,0 +1,94 @@
+/* This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * Authors:
+ * Alexander Aring <aar@pengutronix.de>
+ *
+ * Based on: net/wireless/sysfs.c
+ */
+
+#include <linux/device.h>
+
+#include <net/cfg802154.h>
+
+#define MASTER_SHOW_COMPLEX(name, format_string, args...) \
+static ssize_t name ## _show(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct wpan_phy *phy = container_of(dev, struct wpan_phy, dev); \
+ int ret; \
+ \
+ mutex_lock(&phy->pib_lock); \
+ ret = snprintf(buf, PAGE_SIZE, format_string "\n", args); \
+ mutex_unlock(&phy->pib_lock); \
+ return ret; \
+} \
+static DEVICE_ATTR_RO(name)
+
+#define MASTER_SHOW(field, format_string) \
+ MASTER_SHOW_COMPLEX(field, format_string, phy->field)
+
+MASTER_SHOW(current_channel, "%d");
+MASTER_SHOW(current_page, "%d");
+MASTER_SHOW(transmit_power, "%d +- 1 dB");
+MASTER_SHOW(cca_mode, "%d");
+
+static ssize_t channels_supported_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct wpan_phy *phy = container_of(dev, struct wpan_phy, dev);
+ int ret;
+ int i, len = 0;
+
+ mutex_lock(&phy->pib_lock);
+ for (i = 0; i < 32; i++) {
+ ret = snprintf(buf + len, PAGE_SIZE - len,
+ "%#09x\n", phy->channels_supported[i]);
+ if (ret < 0)
+ break;
+ len += ret;
+ }
+ mutex_unlock(&phy->pib_lock);
+ return len;
+}
+static DEVICE_ATTR_RO(channels_supported);
+
+static void wpan_phy_release(struct device *d)
+{
+ struct wpan_phy *phy = container_of(d, struct wpan_phy, dev);
+
+ kfree(phy);
+}
+
+static struct attribute *pmib_attrs[] = {
+ &dev_attr_current_channel.attr,
+ &dev_attr_current_page.attr,
+ &dev_attr_channels_supported.attr,
+ &dev_attr_transmit_power.attr,
+ &dev_attr_cca_mode.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(pmib);
+
+struct class wpan_phy_class = {
+ .name = "ieee802154",
+ .dev_release = wpan_phy_release,
+ .dev_groups = pmib_groups,
+};
+
+int wpan_phy_sysfs_init(void)
+{
+ return class_register(&wpan_phy_class);
+}
+
+void wpan_phy_sysfs_exit(void)
+{
+ class_unregister(&wpan_phy_class);
+}