netdev - Re: [PATCH v2] net: phy: dp83867: Add TI dp83867 phy

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Message-ID: <556FBC3E.8050803@gmail.com>
Date:	Wed, 03 Jun 2015 19:47:26 -0700
From:	Florian Fainelli <f.fainelli@...il.com>
To:	Dan Murphy <dmurphy@...com>, netdev@...r.kernel.org,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH v2] net: phy: dp83867: Add TI dp83867 phy

Le 06/02/15 07:34, Dan Murphy a écrit :
> Add support for the TI dp83867 Gigabit ethernet phy
> device.
> 
> The DP83867 is a robust, low power, fully featured
> Physical Layer transceiver with integrated PMD
> sublayers to support 10BASE-T, 100BASE-TX and
> 1000BASE-T Ethernet protocols.

Sorry for the late feedback, since this is a new driver, things outline
below can still be submitted as incremental fixes.

[snip]

> +Required properties:
> +	- reg - The ID number for the phy, usually a small integer
> +	- ti,rx_int_delay - RGMII Recieve Clock Delay - see dt-bindings/net/ti-dp83867.h
> +		for applicable values
> +	- ti,tx_int_delay - RGMII Transmit Clock Delay - see dt-bindings/net/ti-dp83867.h
> +		for applicable values
> +	- ti,fifo_depth - Transmitt FIFO depth- see dt-bindings/net/ti-dp83867.h
> +		for applicable values

We typically use "-" to separate words in DT properties, not "_". I am
not sure about the required nature of these 3 proprietary/specific
properties, cannot there be good reset defaults from the HW in any case?

You might want to add a reference to net/phy.txt for the remaiming DT
properties.

[snip]

> +
> +	if (phy_interface_is_rgmii(phydev)) {
> +		ret = phy_write(phydev, MII_DP83867_PHYCTRL,
> +			(dp83867->fifo_depth << DP83867_PHYCR_FIFO_DEPTH_SHIFT));
> +		if (ret)
> +			return ret;
> +	}
> +
> +	if ((phydev->interface >= PHY_INTERFACE_MODE_RGMII_ID) ||
> +	    (phydev->interface <= PHY_INTERFACE_MODE_RGMII_RXID)) {

This one has not been converted to use the phy_interface_is_rgmii()
helper, but in fact, once you do that, you could probably just add an
early check for this condition, return, and reduce the indentation for
the normal case/RGMII, and eliminate two redundant condition checks.

Thanks!
-- 
Florian
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