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Date: Tue, 3 Jan 2017 13:15:37 -0500
From: Vivien Didelot <vivien.didelot@...oirfairelinux.com>
To: netdev@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, kernel@...oirfairelinux.com,
"David S. Miller" <davem@...emloft.net>,
Florian Fainelli <f.fainelli@...il.com>,
Andrew Lunn <andrew@...n.ch>, cphealy@...il.com,
Vivien Didelot <vivien.didelot@...oirfairelinux.com>
Subject: [PATCH net-next 2/3] net: dsa: move HWMON support to its own file
The HWMON support in DSA is currently embedded in the legacy DSA code.
Move it out in its own file, so that it can be reused in newer DSA code.
---
net/dsa/Makefile | 1 +
net/dsa/dsa.c | 131 +---------------------------------------------
net/dsa/dsa_priv.h | 9 ++++
net/dsa/hwmon.c | 149 +++++++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 161 insertions(+), 129 deletions(-)
create mode 100644 net/dsa/hwmon.c
diff --git a/net/dsa/Makefile b/net/dsa/Makefile
index a3380ed0e0be..560b6747c276 100644
--- a/net/dsa/Makefile
+++ b/net/dsa/Makefile
@@ -1,6 +1,7 @@
# the core
obj-$(CONFIG_NET_DSA) += dsa_core.o
dsa_core-y += dsa.o slave.o dsa2.o
+dsa_core-$(CONFIG_NET_DSA_HWMON) += hwmon.o
# tagging formats
dsa_core-$(CONFIG_NET_DSA_TAG_BRCM) += tag_brcm.o
diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 89e66b623d73..aa73f923e9b5 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -9,9 +9,7 @@
* (at your option) any later version.
*/
-#include <linux/ctype.h>
#include <linux/device.h>
-#include <linux/hwmon.h>
#include <linux/list.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
@@ -110,105 +108,6 @@ dsa_switch_probe(struct device *parent, struct device *host_dev, int sw_addr,
return ret;
}
-/* hwmon support ************************************************************/
-
-#ifdef CONFIG_NET_DSA_HWMON
-
-static ssize_t temp1_input_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct dsa_switch *ds = dev_get_drvdata(dev);
- int temp, ret;
-
- ret = ds->ops->get_temp(ds, &temp);
- if (ret < 0)
- return ret;
-
- return sprintf(buf, "%d\n", temp * 1000);
-}
-static DEVICE_ATTR_RO(temp1_input);
-
-static ssize_t temp1_max_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct dsa_switch *ds = dev_get_drvdata(dev);
- int temp, ret;
-
- ret = ds->ops->get_temp_limit(ds, &temp);
- if (ret < 0)
- return ret;
-
- return sprintf(buf, "%d\n", temp * 1000);
-}
-
-static ssize_t temp1_max_store(struct device *dev,
- struct device_attribute *attr, const char *buf,
- size_t count)
-{
- struct dsa_switch *ds = dev_get_drvdata(dev);
- int temp, ret;
-
- ret = kstrtoint(buf, 0, &temp);
- if (ret < 0)
- return ret;
-
- ret = ds->ops->set_temp_limit(ds, DIV_ROUND_CLOSEST(temp, 1000));
- if (ret < 0)
- return ret;
-
- return count;
-}
-static DEVICE_ATTR_RW(temp1_max);
-
-static ssize_t temp1_max_alarm_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct dsa_switch *ds = dev_get_drvdata(dev);
- bool alarm;
- int ret;
-
- ret = ds->ops->get_temp_alarm(ds, &alarm);
- if (ret < 0)
- return ret;
-
- return sprintf(buf, "%d\n", alarm);
-}
-static DEVICE_ATTR_RO(temp1_max_alarm);
-
-static struct attribute *dsa_hwmon_attrs[] = {
- &dev_attr_temp1_input.attr, /* 0 */
- &dev_attr_temp1_max.attr, /* 1 */
- &dev_attr_temp1_max_alarm.attr, /* 2 */
- NULL
-};
-
-static umode_t dsa_hwmon_attrs_visible(struct kobject *kobj,
- struct attribute *attr, int index)
-{
- struct device *dev = container_of(kobj, struct device, kobj);
- struct dsa_switch *ds = dev_get_drvdata(dev);
- struct dsa_switch_ops *ops = ds->ops;
- umode_t mode = attr->mode;
-
- if (index == 1) {
- if (!ops->get_temp_limit)
- mode = 0;
- else if (!ops->set_temp_limit)
- mode &= ~S_IWUSR;
- } else if (index == 2 && !ops->get_temp_alarm) {
- mode = 0;
- }
- return mode;
-}
-
-static const struct attribute_group dsa_hwmon_group = {
- .attrs = dsa_hwmon_attrs,
- .is_visible = dsa_hwmon_attrs_visible,
-};
-__ATTRIBUTE_GROUPS(dsa_hwmon);
-
-#endif /* CONFIG_NET_DSA_HWMON */
-
/* basic switch operations **************************************************/
int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct device *dev,
struct device_node *port_dn, int port)
@@ -417,30 +316,7 @@ static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent)
if (ret)
return ret;
-#ifdef CONFIG_NET_DSA_HWMON
- /* If the switch provides a temperature sensor,
- * register with hardware monitoring subsystem.
- * Treat registration error as non-fatal and ignore it.
- */
- if (ops->get_temp) {
- const char *netname = netdev_name(dst->master_netdev);
- char hname[IFNAMSIZ + 1];
- int i, j;
-
- /* Create valid hwmon 'name' attribute */
- for (i = j = 0; i < IFNAMSIZ && netname[i]; i++) {
- if (isalnum(netname[i]))
- hname[j++] = netname[i];
- }
- hname[j] = '\0';
- scnprintf(ds->hwmon_name, sizeof(ds->hwmon_name), "%s_dsa%d",
- hname, index);
- ds->hwmon_dev = hwmon_device_register_with_groups(NULL,
- ds->hwmon_name, ds, dsa_hwmon_groups);
- if (IS_ERR(ds->hwmon_dev))
- ds->hwmon_dev = NULL;
- }
-#endif /* CONFIG_NET_DSA_HWMON */
+ dsa_hwmon_register(ds);
return 0;
}
@@ -500,10 +376,7 @@ static void dsa_switch_destroy(struct dsa_switch *ds)
{
int port;
-#ifdef CONFIG_NET_DSA_HWMON
- if (ds->hwmon_dev)
- hwmon_device_unregister(ds->hwmon_dev);
-#endif
+ dsa_hwmon_unregister(ds);
/* Destroy network devices for physical switch ports. */
for (port = 0; port < DSA_MAX_PORTS; port++) {
diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h
index 6cfd7388834e..8cdbc4a7b678 100644
--- a/net/dsa/dsa_priv.h
+++ b/net/dsa/dsa_priv.h
@@ -57,6 +57,15 @@ const struct dsa_device_ops *dsa_resolve_tag_protocol(int tag_protocol);
int dsa_cpu_port_ethtool_setup(struct dsa_switch *ds);
void dsa_cpu_port_ethtool_restore(struct dsa_switch *ds);
+/* hwmon.c */
+#if CONFIG_NET_DSA_HWMON
+void dsa_hwmon_register(struct dsa_switch *ds);
+void dsa_hwmon_unregister(struct dsa_switch *ds);
+#else
+static inline void dsa_hwmon_register(struct dsa_switch *ds) { }
+static inline void dsa_hwmon_unregister(struct dsa_switch *ds) { }
+#endif
+
/* slave.c */
extern const struct dsa_device_ops notag_netdev_ops;
void dsa_slave_mii_bus_init(struct dsa_switch *ds);
diff --git a/net/dsa/hwmon.c b/net/dsa/hwmon.c
new file mode 100644
index 000000000000..7b3d1a9c2be2
--- /dev/null
+++ b/net/dsa/hwmon.c
@@ -0,0 +1,149 @@
+/*
+ * net/dsa/hwmon.c - HWMON subsystem support
+ * Copyright (c) 2014 Guenter Roeck <linux@...ck-us.net>
+ * Copyright (c) 2017 Vivien Didelot <vivien.didelot@...oirfairelinux.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/ctype.h>
+#include <linux/hwmon.h>
+#include <net/dsa.h>
+
+#include "dsa_priv.h"
+
+static ssize_t temp1_input_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct dsa_switch *ds = dev_get_drvdata(dev);
+ int temp, ret;
+
+ ret = ds->ops->get_temp(ds, &temp);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%d\n", temp * 1000);
+}
+static DEVICE_ATTR_RO(temp1_input);
+
+static ssize_t temp1_max_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct dsa_switch *ds = dev_get_drvdata(dev);
+ int temp, ret;
+
+ ret = ds->ops->get_temp_limit(ds, &temp);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%d\n", temp * 1000);
+}
+
+static ssize_t temp1_max_store(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t count)
+{
+ struct dsa_switch *ds = dev_get_drvdata(dev);
+ int temp, ret;
+
+ ret = kstrtoint(buf, 0, &temp);
+ if (ret < 0)
+ return ret;
+
+ ret = ds->ops->set_temp_limit(ds, DIV_ROUND_CLOSEST(temp, 1000));
+ if (ret < 0)
+ return ret;
+
+ return count;
+}
+static DEVICE_ATTR_RW(temp1_max);
+
+static ssize_t temp1_max_alarm_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct dsa_switch *ds = dev_get_drvdata(dev);
+ bool alarm;
+ int ret;
+
+ ret = ds->ops->get_temp_alarm(ds, &alarm);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%d\n", alarm);
+}
+static DEVICE_ATTR_RO(temp1_max_alarm);
+
+static struct attribute *dsa_hwmon_attrs[] = {
+ &dev_attr_temp1_input.attr, /* 0 */
+ &dev_attr_temp1_max.attr, /* 1 */
+ &dev_attr_temp1_max_alarm.attr, /* 2 */
+ NULL
+};
+
+static umode_t dsa_hwmon_attrs_visible(struct kobject *kobj,
+ struct attribute *attr, int index)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct dsa_switch *ds = dev_get_drvdata(dev);
+ struct dsa_switch_ops *ops = ds->ops;
+ umode_t mode = attr->mode;
+
+ if (index == 1) {
+ if (!ops->get_temp_limit)
+ mode = 0;
+ else if (!ops->set_temp_limit)
+ mode &= ~S_IWUSR;
+ } else if (index == 2 && !ops->get_temp_alarm) {
+ mode = 0;
+ }
+ return mode;
+}
+
+static const struct attribute_group dsa_hwmon_group = {
+ .attrs = dsa_hwmon_attrs,
+ .is_visible = dsa_hwmon_attrs_visible,
+};
+__ATTRIBUTE_GROUPS(dsa_hwmon);
+
+void dsa_hwmon_register(struct dsa_switch *ds)
+{
+ const char *netname = netdev_name(ds->dst->master_netdev);
+ char hname[IFNAMSIZ + 1];
+ int i, j;
+
+ /* If the switch provides temperature accessors, register with hardware
+ * monitoring subsystem. Treat registration error as non-fatal.
+ */
+ if (!ds->ops->get_temp)
+ return;
+
+ /* Create valid hwmon 'name' attribute */
+ for (i = j = 0; i < IFNAMSIZ && netname[i]; i++) {
+ if (isalnum(netname[i]))
+ hname[j++] = netname[i];
+ }
+ hname[j] = '\0';
+ scnprintf(ds->hwmon_name, sizeof(ds->hwmon_name), "%s_dsa%d", hname,
+ ds->index);
+ ds->hwmon_dev = hwmon_device_register_with_groups(NULL, ds->hwmon_name,
+ ds, dsa_hwmon_groups);
+ if (IS_ERR(ds->hwmon_dev)) {
+ pr_warn("DSA: failed to register HWMON subsystem for switch %d\n",
+ ds->index);
+ ds->hwmon_dev = NULL;
+ } else {
+ pr_info("DSA: registered HWMON subsystem for switch %d\n",
+ ds->index);
+ }
+}
+
+void dsa_hwmon_unregister(struct dsa_switch *ds)
+{
+ if (ds->hwmon_dev) {
+ hwmon_device_unregister(ds->hwmon_dev);
+ ds->hwmon_dev = NULL;
+ }
+}
--
2.11.0
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