From: Andrew Lunn andrew@lunn.ch
[ Upstream commit 0cea0e1148fe134a4a3aaf0b1496f09241fb943a ]
The RX power read from the SFP uses units of 0.1uW. This must be scaled to units of uW for HWMON. This requires a divide by 10, not the current 100.
With this change in place, sensors(1) and ethtool -m agree:
sff2-isa-0000 Adapter: ISA adapter in0: +3.23 V temp1: +33.1 C power1: 270.00 uW power2: 200.00 uW curr1: +0.01 A
Laser output power : 0.2743 mW / -5.62 dBm Receiver signal average optical power : 0.2014 mW / -6.96 dBm
Reported-by: chris.healy@zii.aero Signed-off-by: Andrew Lunn andrew@lunn.ch Fixes: 1323061a018a ("net: phy: sfp: Add HWMON support for module sensors") Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/phy/sfp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/phy/sfp.c +++ b/drivers/net/phy/sfp.c @@ -514,7 +514,7 @@ static int sfp_hwmon_read_sensor(struct
static void sfp_hwmon_to_rx_power(long *value) { - *value = DIV_ROUND_CLOSEST(*value, 100); + *value = DIV_ROUND_CLOSEST(*value, 10); }
static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset,