From 87e5f66b3723b2d912b565bf7100e5121f302cbf Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Wed, 29 Oct 2014 10:45:00 -0700 Subject: [PATCH] net: dsa/mv88e6123_61_65: Report chip temperature MV88E6123 and compatible chips support reading the chip temperature from PHY register 6:26. Signed-off-by: Guenter Roeck Signed-off-by: David S. Miller --- drivers/net/dsa/mv88e6123_61_65.c | 68 ++++++++++++++++++++++++++++++- 1 file changed, 66 insertions(+), 2 deletions(-) diff --git a/drivers/net/dsa/mv88e6123_61_65.c b/drivers/net/dsa/mv88e6123_61_65.c index a332c53ff955..9f43c9b94150 100644 --- a/drivers/net/dsa/mv88e6123_61_65.c +++ b/drivers/net/dsa/mv88e6123_61_65.c @@ -291,6 +291,54 @@ static int mv88e6123_61_65_setup_port(struct dsa_switch *ds, int p) return 0; } +#ifdef CONFIG_NET_DSA_HWMON + +static int mv88e6123_61_65_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 mv88e6123_61_65_setup(struct dsa_switch *ds) { struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); @@ -299,6 +347,7 @@ static int mv88e6123_61_65_setup(struct dsa_switch *ds) mutex_init(&ps->smi_mutex); mutex_init(&ps->stats_mutex); + mutex_init(&ps->phy_mutex); ret = mv88e6123_61_65_switch_reset(ds); if (ret < 0) @@ -329,16 +378,28 @@ static int mv88e6123_61_65_port_to_phy_addr(int port) static int mv88e6123_61_65_phy_read(struct dsa_switch *ds, int port, int regnum) { + struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); int addr = mv88e6123_61_65_port_to_phy_addr(port); - return mv88e6xxx_phy_read(ds, addr, regnum); + int ret; + + mutex_lock(&ps->phy_mutex); + ret = mv88e6xxx_phy_read(ds, addr, regnum); + mutex_unlock(&ps->phy_mutex); + return ret; } static int mv88e6123_61_65_phy_write(struct dsa_switch *ds, int port, int regnum, u16 val) { + struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); int addr = mv88e6123_61_65_port_to_phy_addr(port); - return mv88e6xxx_phy_write(ds, addr, regnum, val); + int ret; + + mutex_lock(&ps->phy_mutex); + ret = mv88e6xxx_phy_write(ds, addr, regnum, val); + mutex_unlock(&ps->phy_mutex); + return ret; } static struct mv88e6xxx_hw_stat mv88e6123_61_65_hw_stats[] = { @@ -406,6 +467,9 @@ struct dsa_switch_driver mv88e6123_61_65_switch_driver = { .get_strings = mv88e6123_61_65_get_strings, .get_ethtool_stats = mv88e6123_61_65_get_ethtool_stats, .get_sset_count = mv88e6123_61_65_get_sset_count, +#ifdef CONFIG_NET_DSA_HWMON + .get_temp = mv88e6123_61_65_get_temp, +#endif }; MODULE_ALIAS("platform:mv88e6123"); -- 2.34.1