linux-kernel - Re: [PATCH net-next 7/9] net: phy: enable qoriq backplane support

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Date:   Thu, 26 Mar 2020 13:03:42 -0700
From:   Joe Perches <joe@...ches.com>
To:     florinel.iordache@....com, davem@...emloft.net,
        netdev@...r.kernel.org, andrew@...n.ch, f.fainelli@...il.com,
        hkallweit1@...il.com, linux@...linux.org.uk
Cc:     devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
        robh+dt@...nel.org, mark.rutland@....com, kuba@...nel.org,
        corbet@....net, shawnguo@...nel.org, leoyang.li@....com,
        madalin.bucur@....nxp.com, ioana.ciornei@....com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 7/9] net: phy: enable qoriq backplane support

On Thu, 2020-03-26 at 15:51 +0200, Florinel Iordache wrote:
> Enable backplane support for qoriq family of devices

trivial notes:

> diff --git a/drivers/net/phy/backplane/qoriq_backplane.c b/drivers/net/phy/backplane/qoriq_backplane.c
[]
> +static int qoriq_backplane_probe(struct phy_device *bpphy)
> +{
> +	static bool one_time_action = true;
> +
> +	if (one_time_action) {
> +		one_time_action = false;
> +		pr_info("%s: QorIQ Backplane driver version %s\n",
> +			QORIQ_BACKPLANE_DRIVER_NAME,
> +			QORIQ_BACKPLANE_DRIVER_VERSION);
> +	}

There is an existing mechanism for this:

	pr_info_once("%s: ... %s\n", etc...);

[]

> +static int qoriq_backplane_config_init(struct phy_device *bpphy)
> +{
[]
> +	for (i = 0; i < bp_phy->num_lanes; i++) {
[]
> +		ret = of_address_to_resource(lane_node, 0, &res);
> +		if (ret) {
> +			bpdev_err(bpphy,
> +				  "could not obtain lane memory map for index=%d, ret = %d\n",
> +				  i, ret);
> +			return ret;

This could use the new vsprintf %pe extension:

			bpdev_err(bpphy,
				  "could not obtain lane memory map for index=%d, %pe\n",
				  i, ERR_PTR(ret));

> +	ret = of_address_to_resource(serdes_node, 0, &res);
> +	if (ret) {
> +		bpdev_err(bpphy,
> +			  "could not obtain serdes memory map, ret = %d\n",
> +			  ret);
> +		return ret;

%pe etc.

[]

> +	for (i = 0; i < comp_no; i++) {
> +		ret = of_property_read_string_index(serdes_node, "compatible",
> +						    i, &serdes_comp);
> +		if (ret == 0) {
> +			if (!strcasecmp(serdes_comp, "serdes-10g")) {
> +				serdes_type = SERDES_10G;
> +				break;
> +			} else if (!strcasecmp(serdes_comp, "serdes-28g")) {
> +				serdes_type = SERDES_28G;
> +				break;
> +			}
> +		}
> +	}
[]
> +static int qoriq_backplane_match_phy_device(struct phy_device *bpphy)
> +{
[]
> +	for (i = 0; i < comp_no; i++) {
> +		ret = of_property_read_string_index(serdes_node, "compatible",
> +						    i, &serdes_comp);
> +		if (ret == 0) {
> +			if (!strcasecmp(serdes_comp, "serdes-10g")) {
> +				serdes_type = SERDES_10G;
> +				break;
> +			} else if (!strcasecmp(serdes_comp, "serdes-28g")) {
> +				serdes_type = SERDES_28G;
> +				break;
> +			}
> +		}
> +	}
[]

Maybe add and use a helper function?