Use hyphens instead of underscores for property separation

[rruuaanng]

Is your enhancement proposal related to a problem? Please describe.

#53506 #83352 work list

In the current source tree, all properties in devicetree and bindings across subsystems that contain underscores need to be renamed using hyphens.
(The scope of work only includes the dts/ directory. However, if any DTS files located in other directories depend on the bindings, please disregard this statement and feel free to make changes as needed.)

dts/bindings/

• usb boards: nxp: Change the property names in the DTS #83771
• timer
• stepper
• spi
• sdhc
• led
• i2s
• i2c
• hwspinlock
• gpio
• ethernet
• dma dts: bindings dma: Change the property names in the bindings #83769
• display boards: shields: Change the property names in the overlay #83840
• dac
• counter test: drivers: counter: Change the property names in the overlay #83770
• clock
• can dts: bindings: can: infineon: xmc4xxx: rename clock_div8 to clock-div8 #83782
• adc test: drivers: adc: Change the property names in the overlay #83768

Describe the solution you'd like

None

Describe alternatives you've considered

None

Additional context

A change probably includes such a process:

1. e.g. This property tick_us needs to be renamed to tick-us.
2. Modify the corresponding property name in the corresponding binding.

These two are exceptions:

mmc-hs400-1_8v
mmc-hs200-1_8v

And, you can get a migration script from 9fcf476 to quickly change the binding name.

[rruuaanng]

If you're interested, feel free to take on any of these tasks. I truly appreciate all your efforts!

[henrikbrixandersen]

@rruuaanng Thank you for opening this.

For the CAN bindings the only underscores, I see, are:

• dts/bindings/can/bosch,m_can-base.yaml binding name (aligns with https://github.com/torvalds/linux/blob/master/Documentation/devicetree/bindings/net/can/bosch%2Cm_can.yaml)
• dts/bindings/can/infineon,xmc4xxx-can-node.yaml: clock_div8: Renamed here: dts: bindings: can: infineon: xmc4xxx: rename clock_div8 to clock-div8 #83782

[rruuaanng]

Thank you for the time you spent on this task, Henrik, it was quite difficult to locate them 👍

[rruuaanng]

cc @jilaypandya Maybe you will be interested in stepper.