Re: [PATCH] MIPS: dts: ralink: Add Mediatek MT7628A SoC

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi Rob,

On 18/08/17 15:04, Rob Herring wrote:
On Fri, Aug 18, 2017 at 4:42 AM, Harvey Hunt <Harvey.Hunt@xxxxxxxxxx> wrote:
Hi Rob,

Thanks for the review.


On 17/08/17 22:34, Rob Herring wrote:

On Tue, Aug 15, 2017 at 05:28:50PM +0100, Harvey Hunt wrote:

The MT7628A is the successor to the MT7620 and pin compatible with the
MT7688A, although the latter supports only a 1T1R antenna rather than
a 2T2R antenna.

[...]

+               uartlite@c00 {


serial@c00

And so on. IOW, use standard, generic node names as defined in the DT
spec.



The clocks for the UARTs are using the device names "uartlite", "uart1" and
"uart2" (as defined in arch/mips/ralink/mt7620.c).

You can't add clocks to the DT? Looks like mt76x8 at least should be
pretty easy with some fixed clocks.

Depending if backwards compatibility (old dtb working on new kernel)
is a concern on these platforms, you could just change all the names
both in the kernel and dts.

I don't think backwards compatibility will matter - the bootloaders I've come across don't ship DTBs with them and I don't think there are any ralink devices using the upstream MT7620 DT.

John might have some thoughts on backwards compat though.


Changing the name of the DT nodes causes the serial driver to bail as it
can't find the clock for the device.

arch/mips/boot/dts/ralink/mt7620a.dtsi is already using the uartlite name,
although it hasn't been documented...

Generally the kernel shouldn't care what the names are (though you can
match by name, it's not widely used).

In any case, I guess fixing this can be done later.

Rob


Shall I respin this patch with the earlier nodes (intc etc) renamed and then send a patch later to rename the serial ports in the DT and kernel (assuming there are no backwards compatibility issues)?

Thanks,

Harvey




[Index of Archives]     [Linux MIPS Home]     [LKML Archive]     [Linux ARM Kernel]     [Linux ARM]     [Linux]     [Git]     [Yosemite News]     [Linux SCSI]     [Linux Hams]

  Powered by Linux