diff options
Diffstat (limited to 'drivers/net/dsa/mv88e6xxx.c')
| -rw-r--r-- | drivers/net/dsa/mv88e6xxx.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c index da558d887dad..cd6807c6b4ed 100644 --- a/drivers/net/dsa/mv88e6xxx.c +++ b/drivers/net/dsa/mv88e6xxx.c @@ -539,6 +539,54 @@ void mv88e6xxx_get_regs(struct dsa_switch *ds, int port, } } +#ifdef CONFIG_NET_DSA_HWMON + +int mv88e6xxx_get_temp(struct dsa_switch *ds, int *temp) +{ + struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); + int ret; + int val; + + *temp = 0; + + mutex_lock(&ps->phy_mutex); + + ret = mv88e6xxx_phy_write(ds, 0x0, 0x16, 0x6); + if (ret < 0) + goto error; + + /* Enable temperature sensor */ + ret = mv88e6xxx_phy_read(ds, 0x0, 0x1a); + if (ret < 0) + goto error; + + ret = mv88e6xxx_phy_write(ds, 0x0, 0x1a, ret | (1 << 5)); + if (ret < 0) + goto error; + + /* Wait for temperature to stabilize */ + usleep_range(10000, 12000); + + val = mv88e6xxx_phy_read(ds, 0x0, 0x1a); + if (val < 0) { + ret = val; + goto error; + } + + /* Disable temperature sensor */ + ret = mv88e6xxx_phy_write(ds, 0x0, 0x1a, ret & ~(1 << 5)); + if (ret < 0) + goto error; + + *temp = ((val & 0x1f) - 5) * 5; + +error: + mv88e6xxx_phy_write(ds, 0x0, 0x16, 0x0); + mutex_unlock(&ps->phy_mutex); + return ret; +} +#endif /* CONFIG_NET_DSA_HWMON */ + static int __init mv88e6xxx_init(void) { #if IS_ENABLED(CONFIG_NET_DSA_MV88E6131) |