Did you mean Documentation/devicetree/bindings/hwmon/max31785.txt? If
so, there is no 'pmbus-fan' in it or anywhere else except aspeed dts
files.
The state of the aspeed dts files is really quite sad. This is a count
of warnings. The first number is total warnings. The second number is
unique warnings (stripping the dtb name so we don't have N warnings
for N boards). The 2nd list is undocumented (by schema) compatibles.
The number of warnings vs. Linus's tree is higher already and we just
started the cycle. That's the wrong direction and in general I see
very little if any effort reducing the warnings for aspeed.
This is all run daily here: https://gitlab.com/robherring/linux-dt/-/jobs
arch/arm/boot/dts/aspeed:3682:635
184 sbefifo@2400: '#address-cells', '#size-cells' do not match
any of the regexes: 'pinctrl-[0-9]+'
160 i2cr@20: #address-cells: 1 was expected
88 eeprom@0: 'size' is a required property
88 eeprom@0: 'pagesize' is a required property
88 eeprom@0: 'address-width' is a required property
70 lpc@1e789000: reg-io-width: 4 is not of type 'object'
62 kcs@2c: 'clocks' does not match any of the regexes: 'pinctrl-[0-9]+'
62 kcs@28: 'clocks' does not match any of the regexes: 'pinctrl-[0-9]+'
62 kcs@24: 'clocks' does not match any of the regexes: 'pinctrl-[0-9]+'
62 kcs@114: 'clocks' does not match any of the regexes: 'pinctrl-[0-9]+'
45 sram@1e720000: 'ranges' is a required property
45 sram@1e720000: '#size-cells' is a required property
45 sram@1e720000: '#address-cells' is a required property
45 lpc@1e789000: lpc-snoop@90: 'clocks' does not match any of
the regexes: 'pinctrl-[0-9]+'
25 timer: 'clocks' does not match any of the regexes: 'pinctrl-[0-9]+'
25 syscon@1e6e2000: 'smp-memram@180' does not match any of the
regexes: '^interrupt-controller@[0-9a-f]+$',
'^p2a-control@[0-9a-f]+$', '^pinctrl(@[0-9a-f]+)?$',
'^silicon-id@[0-9a-f]+$', 'pinctrl-[0-9]+'
25 lpc@1e789000: lpc-snoop@80: 'clocks' does not match any of
the regexes: 'pinctrl-[0-9]+'
25 ftgmac@1e690000: $nodename:0: 'ftgmac@1e690000' does not
match '^ethernet(@.*)?$'
25 ftgmac@1e680000: $nodename:0: 'ftgmac@1e680000' does not
match '^ethernet(@.*)?$'
25 ftgmac@1e670000: $nodename:0: 'ftgmac@1e670000' does not
match '^ethernet(@.*)?$'
25 ftgmac@1e660000: $nodename:0: 'ftgmac@1e660000' does not
match '^ethernet(@.*)?$'
25 fsi@1e79b100: compatible: ['aspeed,ast2600-fsi-master',
'fsi-master'] is too long
25 fsi@1e79b000: compatible: ['aspeed,ast2600-fsi-master',
'fsi-master'] is too long
25 crypto@1e6fa000: 'aspeed,ahbc' does not match any of the
regexes: 'pinctrl-[0-9]+'
25 bus@1e600000: compatible: ['aspeed,ast2600-ahbc', 'syscon'] is too long
24 sdc@1e740000: sdhci@1e740200:compatible:
['aspeed,ast2600-sdhci', 'sdhci'] is too long
24 sdc@1e740000: sdhci@1e740100:compatible:
['aspeed,ast2600-sdhci', 'sdhci'] is too long
22 spi@60: 'eeprom@0' does not match any of the regexes:
'^spi@[0-9a-f]+$', 'pinctrl-[0-9]+'
22 spi@40: 'eeprom@0' does not match any of the regexes:
'^spi@[0-9a-f]+$', 'pinctrl-[0-9]+'
22 sbefifo@2400: occ: 'occ-hwmon', 'reg' do not match any of the
regexes: 'pinctrl-[0-9]+'
arch/arm/boot/dts/aspeed:68
['adi, adm1272']
['adm1272']
['adm1275']
['aspeed,ast2400-cf-fsi-master', 'fsi-master']
['aspeed,ast2400-cvic', 'aspeed-cvic']
['aspeed,ast2400-i2c-ic']
['aspeed,ast2400-ibt-bmc']
['aspeed,ast2400-lhc']
['aspeed,ast2400-p2a-ctrl']
['aspeed,ast2400-pwm-tacho']
['aspeed,ast2400-timer']
['aspeed,ast2400-vic']
['aspeed,ast2400-video-engine']
['aspeed,ast2500-cf-fsi-master', 'fsi-master']
['aspeed,ast2500-cvic', 'aspeed-cvic']
['aspeed,ast2500-gfx', 'syscon']
['aspeed,ast2500-i2c-ic']
['aspeed,ast2500-ibt-bmc']
['aspeed,ast2500-lhc']
['aspeed,ast2500-p2a-ctrl']
['aspeed,ast2500-pwm-tacho']
['aspeed,ast2500-scu-ic']
['aspeed,ast2500-sdram-edac']
['aspeed,ast2500-video-engine']
['aspeed,ast2500-xdma']
['aspeed,ast2600-fsi-master', 'fsi-master']
['aspeed,ast2600-gfx', 'syscon']
['aspeed,ast2600-ibt-bmc']
['aspeed,ast2600-lhc']
['aspeed,ast2600-scu-ic0']
['aspeed,ast2600-scu-ic1']
['aspeed,ast2600-sdhci', 'sdhci']
['aspeed,ast2600-sdram-edac', 'syscon']
['aspeed,ast2600-smpmem']
['aspeed,ast2600-timer']
['aspeed,ast2600-udma']
['aspeed,ast2600-video-engine']
['aspeed,ast2600-xdma']
['atmel,at30tse004a']
['dallas,ds3231']
['delta,dps800']
['dps650ab']
['fsi-master-gpio', 'fsi-master']
['fsi-master-hub']
['ibm,bonnell-bmc', 'aspeed,ast2600']
['ibm,fsi-i2c-master']
['ibm,fsi-master-hub']
['ibm,fsi2pib']
['ibm,pca9552']
['infineon,ir35221']
['infineon,pxe1610']
['ipmb-dev']
['isil,isl69260']
['isil,raa229004']
['lm75']
['max31790']
['maxim,max31785a']
['microchip,emc1413']
['mps,mp5023']
['nuvoton,w83795g']
['nvt210']
['nxp,pca9551']
['nxp,pca9552']
['nxp,pca9641']
['pmbus']
['pmbus-fan']
['si,si7021a20']
['ti,ucd90160']