Re: [PATCH net-next 16/30] net: dsa: mt7530: move lowering port 5 RGMII driving to mt7530_setup()

Arınç ÜNAL
2023-06-04T07:07:21Z

On 26.05.2023 16:17, Vladimir Oltean wrote:
> On Mon, May 22, 2023 at 03:15:18PM +0300, arinc9.unal@gmail.com wrote:
>> From: Arınç ÜNAL <arinc.unal@arinc9.com>
>>
>> Move lowering Tx driving of rgmii on port 5 to right before lowering of Tx
>> driving of trgmii on port 6 on mt7530_setup().
>>
>> This way, the switch should consume less power regardless of port 5 being
>> used.
>>
>> Tested-by: Arınç ÜNAL <arinc.unal@arinc9.com>
>> Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
>> ---
>
> This patch assumes that the MAC has its TXC ticking even when PMCR_TX_EN
> is unset. Why would it do that?

It wouldn't. I'll drop this patch, thanks. For reference, PMCR_TX_EN
(bit 14) for port 5 is also set in the case of PHY muxing with this code
on mt7530_setup_port5() which doesn't use phylink.

/* Setup the MAC by default for the cpu port */
mt7530_write(priv, MT7530_PMCR_P(5), 0x56300);

0x56300 = 0101 0110 0011 0000 0000

Maybe I should make a patch to use the definitions on mt7530.h for this?

Arınç