Re: [net-next PATCH v8 5/5] net: phy: at803x: add LED support for qca808x

[Maxime Chevallier]

Hello Christian,

On Thu,  4 Jan 2024 12:01:12 +0100
Christian Marangi <ansuelsmth@xxxxxxxxx> wrote:

> Add LED support for QCA8081 PHY.
> 
> Documentation for this LEDs PHY is very scarce even with NDA access
> to Documentation for OEMs. Only the blink pattern are documented and are
> very confusing most of the time. No documentation is present about
> forcing the LED on/off or to always blink.
> 
> Those settings were reversed by poking the regs and trying to find the
> correct bits to trigger these modes. Some bits mode are not clear and
> maybe the documentation option are not 100% correct. For the sake of LED
> support the reversed option are enough to add support for current LED
> APIs.

I have one small comment below :

> +static int qca808x_led_blink_set(struct phy_device *phydev, u8 index,
> +				 unsigned long *delay_on,
> +				 unsigned long *delay_off)
> +{
> +	int ret;
> +	u16 reg;
> +
> +	if (index > 2)
> +		return -EINVAL;
> +
> +	reg = QCA808X_MMD7_LED_FORCE_CTRL(index);
> +
> +	/* Set blink to 50% off, 50% on at 4Hz by default */
> +	ret = phy_modify_mmd(phydev, MDIO_MMD_AN, QCA808X_MMD7_LED_GLOBAL,
> +			     QCA808X_LED_BLINK_FREQ_MASK | QCA808X_LED_BLINK_DUTY_MASK,
> +			     QCA808X_LED_BLINK_FREQ_256HZ | QCA808X_LED_BLINK_DUTY_50_50);

The comment (4Hz) and the blink frequency (256Hz) don't match, is that
right ? because I see there exists a QCA808X_LED_BLINK_FREQ_4HZ
definition, shouldn't it be used ?

Thanks,

Maxime