diff options
author | Guenter Roeck <linux@roeck-us.net> | 2014-10-29 10:44:59 -0700 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2014-10-30 14:54:11 -0400 |
commit | 276db3b15d859e0339baa256edce7b737cc0848f (patch) | |
tree | d1186f8dfbca42a83155b8f2f7d69dd6977869b2 /drivers/net/dsa | |
parent | 51579c3f1a9192b75365576227d40c7619493285 (diff) | |
download | linux-276db3b15d859e0339baa256edce7b737cc0848f.tar.bz2 |
net: dsa/mv88e6352: Report chip temperature
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>
Diffstat (limited to 'drivers/net/dsa')
-rw-r--r-- | drivers/net/dsa/mv88e6352.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/drivers/net/dsa/mv88e6352.c b/drivers/net/dsa/mv88e6352.c index f17364ff8f3f..744e6fac8023 100644 --- a/drivers/net/dsa/mv88e6352.c +++ b/drivers/net/dsa/mv88e6352.c @@ -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"); |