linux-kernel - Re: [PATCH v2 3/3] net: macb: remove #if defined(CONFIG_ARCH

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Date:	Fri, 6 Mar 2015 17:45:30 +0100
From:	Nicolas Ferre <nicolas.ferre@...el.com>
To:	Boris Brezillon <boris.brezillon@...e-electrons.com>,
	"David S. Miller" <davem@...emloft.net>, <netdev@...r.kernel.org>
CC:	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	"Alexandre Belloni" <alexandre.belloni@...e-electrons.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	"Kumar Gala" <galak@...eaurora.org>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 3/3] net: macb: remove #if defined(CONFIG_ARCH_AT91)
 sections

Le 06/03/2015 11:24, Boris Brezillon a écrit :
> With multi platform support those sections could lead to unexpected
> behavior if both ARCH_AT91 and another ARM SoC using the MACB IP are
> selected.
> Add two new capabilities to encode the default MII mode and the presence
> of a CLKEN bit in USRIO register.
> Then define the appropriate config for IPs embedded in at91 SoCs.
> 
> Signed-off-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
> Reviewed-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@...el.com>
> ---
>  drivers/net/ethernet/cadence/macb.c | 32 +++++++++++++++++---------------
>  drivers/net/ethernet/cadence/macb.h |  2 ++
>  2 files changed, 19 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
> index ad76b8e..86e915f 100644
> --- a/drivers/net/ethernet/cadence/macb.c
> +++ b/drivers/net/ethernet/cadence/macb.c
> @@ -2113,6 +2113,10 @@ static const struct net_device_ops macb_netdev_ops = {
>  };
>  
>  #if defined(CONFIG_OF)
> +static struct macb_config at91sam9260_config = {
> +	.caps = MACB_CAPS_USRIO_HAS_CLKEN | MACB_CAPS_USRIO_DEFAULT_IS_MII,
> +};
> +
>  static struct macb_config pc302gem_config = {
>  	.caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE,
>  	.dma_burst_length = 16,
> @@ -2130,7 +2134,7 @@ static struct macb_config sama5d4_config = {
>  
>  static const struct of_device_id macb_dt_ids[] = {
>  	{ .compatible = "cdns,at32ap7000-macb" },
> -	{ .compatible = "cdns,at91sam9260-macb" },
> +	{ .compatible = "cdns,at91sam9260-macb", .data = &at91sam9260_config },
>  	{ .compatible = "cdns,macb" },
>  	{ .compatible = "cdns,pc302-gem", .data = &pc302gem_config },
>  	{ .compatible = "cdns,gem", .data = &pc302gem_config },
> @@ -2388,21 +2392,19 @@ static int macb_probe(struct platform_device *pdev)
>  		bp->phy_interface = err;
>  	}
>  
> +	config = 0;
>  	if (bp->phy_interface == PHY_INTERFACE_MODE_RGMII)
> -		macb_or_gem_writel(bp, USRIO, GEM_BIT(RGMII));
> -	else if (bp->phy_interface == PHY_INTERFACE_MODE_RMII)
> -#if defined(CONFIG_ARCH_AT91)
> -		macb_or_gem_writel(bp, USRIO, (MACB_BIT(RMII) |
> -					       MACB_BIT(CLKEN)));
> -#else
> -		macb_or_gem_writel(bp, USRIO, 0);
> -#endif
> -	else
> -#if defined(CONFIG_ARCH_AT91)
> -		macb_or_gem_writel(bp, USRIO, MACB_BIT(CLKEN));
> -#else
> -		macb_or_gem_writel(bp, USRIO, MACB_BIT(MII));
> -#endif
> +		config = GEM_BIT(RGMII);
> +	else if (bp->phy_interface == PHY_INTERFACE_MODE_RMII &&
> +		 (bp->caps & MACB_CAPS_USRIO_DEFAULT_IS_MII))
> +		config = MACB_BIT(RMII);
> +	else if (!(bp->caps & MACB_CAPS_USRIO_DEFAULT_IS_MII))
> +		config = MACB_BIT(MII);
> +
> +	if (bp->caps & MACB_CAPS_USRIO_HAS_CLKEN)
> +		config |= MACB_BIT(CLKEN);
> +
> +	macb_or_gem_writel(bp, USRIO, config);
>  
>  	err = register_netdev(dev);
>  	if (err) {
> diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h
> index 31dc080..efe0247 100644
> --- a/drivers/net/ethernet/cadence/macb.h
> +++ b/drivers/net/ethernet/cadence/macb.h
> @@ -389,6 +389,8 @@
>  
>  /* Capability mask bits */
>  #define MACB_CAPS_ISR_CLEAR_ON_WRITE		0x00000001
> +#define MACB_CAPS_USRIO_HAS_CLKEN		0x00000002
> +#define MACB_CAPS_USRIO_DEFAULT_IS_MII		0x00000004
>  #define MACB_CAPS_FIFO_MODE			0x10000000
>  #define MACB_CAPS_GIGABIT_MODE_AVAILABLE	0x20000000
>  #define MACB_CAPS_SG_DISABLED			0x40000000
> 


-- 
Nicolas Ferre
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