netdev - Re: [PATCH] net: ethernet: bgmac: Allow MAC address to be specified in DTB

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Date:   Thu, 16 Mar 2017 09:39:47 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Steve Lin <steven.lin1@...adcom.com>, davem@...emloft.net,
        rafal@...ecki.pl, jon.mason@...adcom.com, tklauser@...tanz.ch
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        bcm-kernel-feedback-list@...adcom.com
Subject: Re: [PATCH] net: ethernet: bgmac: Allow MAC address to be specified
 in DTB

On 03/16/2017 08:48 AM, Steve Lin wrote:
> Allows the BCMA version of the bgmac driver to obtain MAC address
> from the device tree.  If no MAC address is specified there, then
> the previous behavior (obtaining MAC address from SPROM) is
> used.
> 
> Signed-off-by: Steve Lin <steven.lin1@...adcom.com>

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>

PS: you might want to specify which tree this applies to by using [PATCH
net-next] or [PATCH net] in the subject, see the netdev-FAQ.txt for
details:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/networking/netdev-FAQ.txt

> ---
>  drivers/net/ethernet/broadcom/bgmac-bcma.c | 39 ++++++++++++++++++------------
>  1 file changed, 23 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/net/ethernet/broadcom/bgmac-bcma.c b/drivers/net/ethernet/broadcom/bgmac-bcma.c
> index cf15b7e..6322594 100644
> --- a/drivers/net/ethernet/broadcom/bgmac-bcma.c
> +++ b/drivers/net/ethernet/broadcom/bgmac-bcma.c
> @@ -11,6 +11,7 @@
>  #include <linux/bcma/bcma.h>
>  #include <linux/brcmphy.h>
>  #include <linux/etherdevice.h>
> +#include <linux/of_net.h>
>  #include "bgmac.h"
>  
>  static inline bool bgmac_is_bcm4707_family(struct bcma_device *core)
> @@ -114,7 +115,7 @@ static int bgmac_probe(struct bcma_device *core)
>  	struct ssb_sprom *sprom = &core->bus->sprom;
>  	struct mii_bus *mii_bus;
>  	struct bgmac *bgmac;
> -	u8 *mac;
> +	const u8 *mac = NULL;
>  	int err;
>  
>  	bgmac = bgmac_alloc(&core->dev);
> @@ -127,21 +128,27 @@ static int bgmac_probe(struct bcma_device *core)
>  
>  	bcma_set_drvdata(core, bgmac);
>  
> -	switch (core->core_unit) {
> -	case 0:
> -		mac = sprom->et0mac;
> -		break;
> -	case 1:
> -		mac = sprom->et1mac;
> -		break;
> -	case 2:
> -		mac = sprom->et2mac;
> -		break;
> -	default:
> -		dev_err(bgmac->dev, "Unsupported core_unit %d\n",
> -			core->core_unit);
> -		err = -ENOTSUPP;
> -		goto err;
> +	if (bgmac->dev->of_node)
> +		mac = of_get_mac_address(bgmac->dev->of_node);
> +
> +	/* If no MAC address assigned via device tree, check SPROM */
> +	if (!mac) {
> +		switch (core->core_unit) {
> +		case 0:
> +			mac = sprom->et0mac;
> +			break;
> +		case 1:
> +			mac = sprom->et1mac;
> +			break;
> +		case 2:
> +			mac = sprom->et2mac;
> +			break;
> +		default:
> +			dev_err(bgmac->dev, "Unsupported core_unit %d\n",
> +				core->core_unit);
> +			err = -ENOTSUPP;
> +			goto err;
> +		}
>  	}
>  
>  	ether_addr_copy(bgmac->net_dev->dev_addr, mac);
> 


-- 
Florian