net: dsa: Remove hwmon support

Only the Marvell mv88e6xxx DSA driver made use of the HWMON support in
DSA. The temperature sensor registers are actually in the embedded
PHYs, and the PHY driver now supports it. So remove all HWMON support
from DSA and drivers.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 147 deletions

diff --git a/net/dsa/hwmon.c b/net/dsa/hwmon.c
deleted file mode 100644
index 08831a8112781..0000000000000
--- a/net/dsa/hwmon.c
+++ /dev/null
@@ -1,147 +0,0 @@
-/*
- * net/dsa/hwmon.c - HWMON subsystem support
- *
- * 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);
-	const 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;
-	}
-}