Re: [PATCH v2 08/12] net: ethernet: stmmac: stm32: support the phy-supply regulator binding

[Christophe ROULLIER <christophe.roullier@foss.st.com>]

On 9/28/23 19:53, Andrew Lunn wrote:
>> +static int phy_power_on(struct stm32_dwmac *bsp_priv, bool enable)
> I find this function name confusing, since 50% of the time it does not
> actually power the PHY on. You never call it with anything other than
> a static true/false value. So it might was well be two functions,
> phy_power_on() and phy_power_off().

Hi,

I wanted to keep same implementation of all others Ethernet glues 
(dwmac-rk.c ...) to be consistent.

>> +{
>> +	int ret;
>> +	struct device *dev = bsp_priv->dev;
>> +
>> +	if (!bsp_priv->regulator)
>> +		return 0;
>> +
>> +	if (enable) {
>> +		ret = regulator_enable(bsp_priv->regulator);
>> +		if (ret)
>> +			dev_err(dev, "fail to enable phy-supply\n");
> Not all PHYs are usable in 0 picoseconds. You probably want a delay
> here. Otherwise the first few accesses to it might not work.
>
>        Andrew

You're right I will add a delay.

Thanks

Christophe