netdev - Re: [PATCH net-next v9 3/6] net: tn40xx: add basic Tx handling

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Date: Mon, 10 Jun 2024 15:48:50 +0900 (JST)
From: FUJITA Tomonori <fujita.tomonori@...il.com>
To: hfdevel@....net
Cc: fujita.tomonori@...il.com, andrew@...n.ch, horms@...nel.org,
 kuba@...nel.org, jiri@...nulli.us, pabeni@...hat.com,
 linux@...linux.org.uk, naveenm@...vell.com, jdamato@...tly.com,
 netdev@...r.kernel.org
Subject: Re: [PATCH net-next v9 3/6] net: tn40xx: add basic Tx handling

On Sun, 9 Jun 2024 13:41:20 +0200
Hans-Frieder Vogt <hfdevel@....net> wrote:

>> +static int tn40_priv_init(struct tn40_priv *priv)
>> +{
>> +	int ret;
>> +
>> +	tn40_set_link_speed(priv, 0);
>> +
>> +	ret = tn40_hw_reset(priv);
>> +	if (ret)
>> +		return ret;
>> +
>> +	/* Set GPIO[9:0] to output 0 */
>> + tn40_write_reg(priv, 0x51E0, 0x30010006); /* GPIO_OE_ WR CMD */
>> +	tn40_write_reg(priv, 0x51F0, 0x0);	/* GPIO_OE_ DATA */
>> +	tn40_write_reg(priv, TN40_REG_MDIO_CMD_STAT, 0x3ec8);
> 
> the last tn40_write_reg (to TN40_REG_MDIO_CMD_STAT) is in fact the
> same as:
> 
> tn40_mdio_set_speed(priv, TN40_MDIO_SPEED_1MHZ);

This means that as the original driver does, this driver sets bus
speed to 6MHZ for QT2025 PHY, however after that, this driver sets
it to 1MHZ again?