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net: dsa/mv88e6352: Report chip temperature

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MV88E6352 supports reading the chip temperature from two PHY registers,
6:26 and 6:27. Report it using the more accurate register 6:27.
Also report temperature limit and alarm.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Guenter Roeck 2014-10-29 10:44:59 -07:00 committed by David S. Miller
parent 51579c3f1a
commit 276db3b15d
1 changed files with 101 additions and 0 deletions
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101
drivers/net/dsa/mv88e6352.c
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@ -325,6 +325,101 @@ static int mv88e6352_setup_port(struct dsa_switch *ds, int p)
return 0;
}
#ifdef CONFIG_NET_DSA_HWMON
static int mv88e6352_phy_page_read(struct dsa_switch *ds,
int port, int page, int reg)
{
struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
int ret;
mutex_lock(&ps->phy_mutex);
ret = __mv88e6352_phy_write(ds, port, 0x16, page);
if (ret < 0)
goto error;
ret = __mv88e6352_phy_read(ds, port, reg);
error:
__mv88e6352_phy_write(ds, port, 0x16, 0x0);
mutex_unlock(&ps->phy_mutex);
return ret;
}
static int mv88e6352_phy_page_write(struct dsa_switch *ds,
int port, int page, int reg, int val)
{
struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
int ret;
mutex_lock(&ps->phy_mutex);
ret = __mv88e6352_phy_write(ds, port, 0x16, page);
if (ret < 0)
goto error;
ret = __mv88e6352_phy_write(ds, port, reg, val);
error:
__mv88e6352_phy_write(ds, port, 0x16, 0x0);
mutex_unlock(&ps->phy_mutex);
return ret;
}
static int mv88e6352_get_temp(struct dsa_switch *ds, int *temp)
{
int ret;
*temp = 0;
ret = mv88e6352_phy_page_read(ds, 0, 6, 27);
if (ret < 0)
return ret;
*temp = (ret & 0xff) - 25;
return 0;
}
static int mv88e6352_get_temp_limit(struct dsa_switch *ds, int *temp)
{
int ret;
*temp = 0;
ret = mv88e6352_phy_page_read(ds, 0, 6, 26);
if (ret < 0)
return ret;
*temp = (((ret >> 8) & 0x1f) * 5) - 25;
return 0;
}
static int mv88e6352_set_temp_limit(struct dsa_switch *ds, int temp)
{
int ret;
ret = mv88e6352_phy_page_read(ds, 0, 6, 26);
if (ret < 0)
return ret;
temp = clamp_val(DIV_ROUND_CLOSEST(temp, 5) + 5, 0, 0x1f);
return mv88e6352_phy_page_write(ds, 0, 6, 26,
(ret & 0xe0ff) | (temp << 8));
}
static int mv88e6352_get_temp_alarm(struct dsa_switch *ds, bool *alarm)
{
int ret;
*alarm = false;
ret = mv88e6352_phy_page_read(ds, 0, 6, 26);
if (ret < 0)
return ret;
*alarm = !!(ret & 0x40);
return 0;
}
#endif /* CONFIG_NET_DSA_HWMON */
static int mv88e6352_setup(struct dsa_switch *ds)
{
struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
@ -461,6 +556,12 @@ struct dsa_switch_driver mv88e6352_switch_driver = {
.get_strings = mv88e6352_get_strings,
.get_ethtool_stats = mv88e6352_get_ethtool_stats,
.get_sset_count = mv88e6352_get_sset_count,
#ifdef CONFIG_NET_DSA_HWMON
.get_temp = mv88e6352_get_temp,
.get_temp_limit = mv88e6352_get_temp_limit,
.set_temp_limit = mv88e6352_set_temp_limit,
.get_temp_alarm = mv88e6352_get_temp_alarm,
#endif
};
MODULE_ALIAS("platform:mv88e6352");