[PATCH 2/2] arm64: dts: marvell: mcbin: enable uart headers

[Baruch Siach]

Hi Russell,

On Tue, Jan 30, 2018 at 04:05:17PM +0000, Russell King - ARM Linux wrote:
> On Tue, Jan 30, 2018 at 10:01:26AM +0200, Baruch Siach wrote:
> > Add description of the J25 and J27 UART headers of the Macchiatobin. They use
> > uart peripherals that the CP0 (J25) and CP1 (J27) provides.
> 
> The headers are just fed with the GPIO-level signals, which means any
> industry standard usage would require additional RS232 level shifting
> hardware.  So, they're certainly not "generic" serial ports.
> 
> While these are labelled up as UARTs, there's no reason to dedicate
> them as such, they could equally be used to connect to a smart battery/
> UPS system as a SMBus port, or even to control system LEDs / read
> the status of system buttons.
> 
> Do you have an application for these headers?  If not, it's probably
> best to leave them alone (until we have DT overlay support sorted to
> allow boot-loader configuration of hardware such as these - which is
> being worked on for TI and other boards.)

The console UART on the FTDI CON9 microUSB is not accessible when the board is 
mounted on a COTS ATX enclosure. So some users would like UART access through 
the UART headers.

Would you be fine with this patch when 'status = "okay"' is omitted?

baruch

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