Re: [PATCH 1/3] ARM: dts: BCM5301X: Linksys EA9500 make use of pinctrl

On Wed, Oct 07, 2020 at 11:01:34PM +0200, Andrew Lunn wrote:

On Wed, Oct 07, 2020 at 03:01:50PM -0400, Vivek Unune wrote:

quoted

Forgo the use of mmioreg mdio mux infavor of the pinctrl

Hi Vivek

Could you add some more details please. I don't know this
hardware. I'm assuming there are two MDIO busses, external as talked
about in the comments, and an internal one? And for this hardware you
only need one of them? But i don't see what pinmux has to do with
this?

Hi Andrew,

There are indeed two mdio busses. To access the external bus, 9th bit
of the mdio register has to be set. And to enable mii function,
one has to set the registers 6 & 7 which is part of the pin controller.
Earlier the pin controller was not defined and I resorted to use a
combination of memory mapped io mux to change desired bits.

Now that we have a pin controller - which is resposnsible for other 
functionality such as pwm, i2c, uart2, it makes sense to have a consistent
device tree

Hope this helps,

Vivek

Thanks
	Andrew