linux-kernel - Re: [RFC 03/11] net: phy: refactor c45 phy identification sequence

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Message-ID: <20200523152800.GM610998@lunn.ch>
Date:   Sat, 23 May 2020 17:28:00 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Jeremy Linton <jeremy.linton@....com>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, f.fainelli@...il.com,
        hkallweit1@...il.com, linux@...linux.org.uk,
        madalin.bucur@....nxp.com, calvin.johnson@....nxp.com,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC 03/11] net: phy: refactor c45 phy identification sequence

On Fri, May 22, 2020 at 04:30:51PM -0500, Jeremy Linton wrote:
> Lets factor out the phy id logic, and make it generic
> so that it can be used for c22 and c45.
> 
> Signed-off-by: Jeremy Linton <jeremy.linton@....com>
> ---
>  drivers/net/phy/phy_device.c | 65 +++++++++++++++++++-----------------
>  1 file changed, 35 insertions(+), 30 deletions(-)
> 
> diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
> index 7746c07b97fe..f0761fa5e40b 100644
> --- a/drivers/net/phy/phy_device.c
> +++ b/drivers/net/phy/phy_device.c
> @@ -695,6 +695,29 @@ static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr,
>  	return 0;
>  }
>  
> +static int _get_phy_id(struct mii_bus *bus, int addr, int dev_addr,
> +		       u32 *phy_id, bool c45)

Hi Jeremy

How about read_phy_id() so you can avoid the _ prefix.

>  static bool valid_phy_id(int val)
>  {
>  	return (val > 0 && ((val & 0x1fffffff) != 0x1fffffff));
> @@ -715,17 +738,17 @@ static bool valid_phy_id(int val)
>   */
>  static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id,
>  			   struct phy_c45_device_ids *c45_ids) {
> -	int phy_reg;
> -	int i, reg_addr;
> +	int ret;
> +	int i;
>  	const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
>  	u32 *devs = &c45_ids->devices_in_package;
>  
>  	/* Find first non-zero Devices In package. Device zero is reserved
>  	 * for 802.3 c45 complied PHYs, so don't probe it at first.
>  	 */
> -	for (i = 1; i < num_ids && *devs == 0; i++) {
> -		phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, devs);
> -		if (phy_reg < 0)
> +	for (i = 0; i < num_ids && *devs == 0; i++) {
> +		ret = get_phy_c45_devs_in_pkg(bus, addr, i, devs);
> +		if (ret < 0)
>  			return -EIO;

Renaming reg_addr to ret does not belong in this patch.

	 Andrew