Subject: Re: [net-next PATCH 12/13] drivers: net: dsa: qca8k: add support for pws config reg

From: Andrew Lunn <[email-masked]>
Date: Thu, 7 Oct 2021 02:41:10 +0200

> +static int
> +qca8k_setup_of_pws_reg(struct qca8k_priv *priv)
> +{
> +	struct device_node *node = priv->dev->of_node;
> +	u32 val = 0;
> +
> +	if (priv->switch_id == QCA8K_ID_QCA8327)
> +		if (of_property_read_bool(node, "qca,package48"))
> +			val |= QCA8327_PWS_PACKAGE48_EN;

What does this actually do? How is PACKAGE48 different to normal mode?

> +
> +	if (of_property_read_bool(node, "qca,power-on-sel"))
> +		val |= QCA8K_PWS_POWER_ON_SEL;

What happens if you unconditionally do this? Why is a DT property
required?

> +
> +	if (of_property_read_bool(node, "qca,led-open-drain"))
> +		/* POWER_ON_SEL needs to be set when configuring led to open drain */
> +		val |= QCA8K_PWS_LED_OPEN_EN_CSR | QCA8K_PWS_POWER_ON_SEL;

This is getting into territory of adding LED support for PHYs, which
we want to do via the LED subsystem.

   Andrew