Re: [PATCH v1] ARM: dts: protonic prti6q: fix PHY address

[Shawn Guo]

On Mon, Oct 12, 2020 at 09:18:16AM +0200, Oleksij Rempel wrote:
> Due to bug in the bootloader, the PHY has floating address and may
> randomly change on each PHY reset. To avoid it, the updated bootloader
> with the following patch[0] should be used:
> 
> | ARM: protonic: disable on-die termination to fix PHY bootstrapping
> |
> | If on-die termination is enabled, the RXC pin of iMX6 will be pulled
> | high. Since we already have an 10K pull-down on board, the RXC level on
> | PHY reset will be ~800mV, which is mostly interpreted as 1. On some
> | reboots we get 0 instead and kernel can't detect the PHY properly.
> |
> | Since the default 0x020e07ac value is 0, it is sufficient to remove this
> | entry from the affected imxcfg files.
> |
> | Since we get stable 0 on pin PHYADDR[2], the PHY address is changed from
> | 4 to 0.
> 
> With latest bootloader update, the PHY address will be fixed to "0".
> 
> [0] https://git.pengutronix.de/cgit/barebox/commit/?id=93f7dcf631edfcda19e7757b28d66017ea274b81
> 
> Fixes: 0d446a50559 ("ARM: dts: add Protonic PRTI6Q board")
> Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>

Changed subject prefix to 'ARM: dts: imx6q-prti6q: ' and applied the
patch.

Shawn