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realtek: enable HWMON for SFP sensors 

This adds SFP sensors as a hwmon device, allowing readout of
temperatures, DOM and other sensor readings available from the
SFP.  Example from a ZyXEL GS1900-10HP with a DOM capable
1000Base-SX SFP:

root@gs1900-10hp:~# grep . /sys/class/hwmon/hwmon0/*
/sys/class/hwmon/hwmon0/curr1_crit:90
/sys/class/hwmon/hwmon0/curr1_crit_alarm:0
/sys/class/hwmon/hwmon0/curr1_input:4
/sys/class/hwmon/hwmon0/curr1_label:bias
/sys/class/hwmon/hwmon0/curr1_lcrit:0
/sys/class/hwmon/hwmon0/curr1_lcrit_alarm:0
/sys/class/hwmon/hwmon0/curr1_max:85
/sys/class/hwmon/hwmon0/curr1_max_alarm:0
/sys/class/hwmon/hwmon0/curr1_min:0
/sys/class/hwmon/hwmon0/curr1_min_alarm:0
/sys/class/hwmon/hwmon0/in0_crit:3795
/sys/class/hwmon/hwmon0/in0_crit_alarm:0
/sys/class/hwmon/hwmon0/in0_input:3317
/sys/class/hwmon/hwmon0/in0_label:VCC
/sys/class/hwmon/hwmon0/in0_lcrit:2805
/sys/class/hwmon/hwmon0/in0_lcrit_alarm:0
/sys/class/hwmon/hwmon0/in0_max:3465
/sys/class/hwmon/hwmon0/in0_max_alarm:0
/sys/class/hwmon/hwmon0/in0_min:3135
/sys/class/hwmon/hwmon0/in0_min_alarm:0
/sys/class/hwmon/hwmon0/name:sfp_p10
/sys/class/hwmon/hwmon0/power1_crit:708
/sys/class/hwmon/hwmon0/power1_crit_alarm:0
/sys/class/hwmon/hwmon0/power1_input:259
/sys/class/hwmon/hwmon0/power1_label:TX_power
/sys/class/hwmon/hwmon0/power1_lcrit:89
/sys/class/hwmon/hwmon0/power1_lcrit_alarm:0
/sys/class/hwmon/hwmon0/power1_max:501
/sys/class/hwmon/hwmon0/power1_max_alarm:0
/sys/class/hwmon/hwmon0/power1_min:126
/sys/class/hwmon/hwmon0/power1_min_alarm:0
/sys/class/hwmon/hwmon0/power2_crit:1259
/sys/class/hwmon/hwmon0/power2_crit_alarm:0
/sys/class/hwmon/hwmon0/power2_input:404
/sys/class/hwmon/hwmon0/power2_label:RX_power
/sys/class/hwmon/hwmon0/power2_lcrit:6
/sys/class/hwmon/hwmon0/power2_lcrit_alarm:0
/sys/class/hwmon/hwmon0/power2_max:794
/sys/class/hwmon/hwmon0/power2_max_alarm:0
/sys/class/hwmon/hwmon0/power2_min:10
/sys/class/hwmon/hwmon0/power2_min_alarm:0
/sys/class/hwmon/hwmon0/temp1_crit:100000
/sys/class/hwmon/hwmon0/temp1_crit_alarm:0
/sys/class/hwmon/hwmon0/temp1_input:22547
/sys/class/hwmon/hwmon0/temp1_label:temperature
/sys/class/hwmon/hwmon0/temp1_lcrit:-50000
/sys/class/hwmon/hwmon0/temp1_lcrit_alarm:0
/sys/class/hwmon/hwmon0/temp1_max:85000
/sys/class/hwmon/hwmon0/temp1_max_alarm:0
/sys/class/hwmon/hwmon0/temp1_min:-40000
/sys/class/hwmon/hwmon0/temp1_min_alarm:0
/sys/class/hwmon/hwmon0/uevent:OF_NAME=sfp-p10
/sys/class/hwmon/hwmon0/uevent:OF_FULLNAME=/sfp-p10
/sys/class/hwmon/hwmon0/uevent:OF_COMPATIBLE_0=sff,sfp
/sys/class/hwmon/hwmon0/uevent:OF_COMPATIBLE_N=1

Tested-by: Birger Koblitz <mail@birger-koblitz.de>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
This commit is contained in:
Bjørn Mork 2021-03-13 17:45:52 +01:00 committed by Petr Štetiar
parent e8d391bd46
commit 2a912fb63a
1 changed files with 1 additions and 0 deletions
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target/linux/realtek/config-5.4
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@ -82,6 +82,7 @@ CONFIG_HAS_DMA=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT_MAP=y
# CONFIG_HIGH_RES_TIMERS is not set
CONFIG_HWMON=y
CONFIG_HZ=250
CONFIG_HZ_250=y
CONFIG_HZ_PERIODIC=y