linux-kernel - Re: [PATCH net-next v3 2/4] net: phy: Add a helper to return the index for of the internal delay

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Message-ID: <20200527004220.GE782807@lunn.ch>
Date:   Wed, 27 May 2020 02:42:20 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Dan Murphy <dmurphy@...com>
Cc:     f.fainelli@...il.com, hkallweit1@...il.com, davem@...emloft.net,
        robh@...nel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH net-next v3 2/4] net: phy: Add a helper to return the
 index for of the internal delay

> +/**
> + * phy_get_delay_index - returns the index of the internal delay
> + * @phydev: phy_device struct
> + * @delay_values: array of delays the PHY supports
> + * @size: the size of the delay array
> + * @int_delay: the internal delay to be looked up
> + * @descending: if the delay array is in descending order
> + *
> + * Returns the index within the array of internal delay passed in.
> + * Return errno if the delay is invalid or cannot be found.
> + */
> +s32 phy_get_delay_index(struct phy_device *phydev, int *delay_values, int size,
> +			int int_delay, bool descending)
> +{
> +	if (int_delay < 0)
> +		return -EINVAL;
> +
> +	if (size <= 0)
> +		return -EINVAL;
> +
> +	if (descending)
> +		return phy_find_descending_delay(phydev, delay_values, size,
> +						 int_delay);
> +
> +	return phy_find_ascending_delay(phydev, delay_values, size, int_delay);
> +}
> +EXPORT_SYMBOL(phy_get_delay_index);

Do we really need this ascending vs descending? This array is not
coming from device tree of anything, it is a static list in the PHY
driver. I would just define it needs to be ascending and be done.

	Andrew