[U-Boot] [PATCH] net: phy: genphy: Allow overwriting features

[Alexey Brodkin <Alexey.Brodkin@synopsys.com>]

Hi Joe,

On Wed, 2015-12-23 at 19:44 +0300, Alexey Brodkin wrote:
> From: Sascha Hauer <s.hauer@pengutronix.de>
> 
> of_set_phy_supported allows overwiting hardware capabilities of
> a phy with values from the devicetree. This does not work with
> the genphy driver though because the genphys config_init function
> will overwrite all values adjusted by of_set_phy_supported. Fix
> this by initialising the genphy features in the phy_driver struct
> and in config_init just limit the features to the ones the hardware
> can actually support. The resulting features are a subset of the
> devicetree specified features and the hardware features.
> 
> This is a copy of the patch from Linux kernel, see
> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c242a47238fa2a6a54af8a16e62b54e6e031d4bc
> 
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
> Cc: Joe Hershberger <joe.hershberger@ni.com>
> ---
>  drivers/net/phy/phy.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
> index 084276f..ec9be6b 100644
> --- a/drivers/net/phy/phy.c
> +++ b/drivers/net/phy/phy.c
> @@ -380,8 +380,6 @@ int genphy_config(struct phy_device *phydev)
>  	int val;
>  	u32 features;
>  
> -	/* For now, I'll claim that the generic driver supports
> -	 * all possible port types */
>  	features = (SUPPORTED_TP | SUPPORTED_MII
>  			| SUPPORTED_AUI | SUPPORTED_FIBRE |
>  			SUPPORTED_BNC);
> @@ -420,8 +418,8 @@ int genphy_config(struct phy_device *phydev)
>  			features |= SUPPORTED_1000baseX_Half;
>  	}
>  
> -	phydev->supported = features;
> -	phydev->advertising = features;
> +	phydev->supported &= features;
> +	phydev->advertising &= features;
>  
>  	genphy_config_aneg(phydev);
>  
> @@ -445,7 +443,9 @@ static struct phy_driver genphy_driver = {
>  	.uid		= 0xffffffff,
>  	.mask		= 0xffffffff,
>  	.name		= "Generic PHY",
> -	.features	= 0,
> +	.features	= PHY_GBIT_FEATURES | SUPPORTED_MII |
> +			  SUPPORTED_AUI | SUPPORTED_FIBRE |
> +			  SUPPORTED_BNC,
>  	.config		= genphy_config,
>  	.startup	= genphy_startup,
>  	.shutdown	= genphy_shutdown,

Any chance for that one to be applied?
This patch is required to implement phy max
speed limitation by subsequent patches.

-Alexey