[RFC PATCH 02/23] at91: Make Ethernet device common

[Ryan Mallon]

On 04/20/2011 02:10 PM, H Hartley Sweeten wrote:
> On Tuesday, April 19, 2011 6:10 PM, Ryan Mallon wrote:
>>
>> Replace the individual Ethernet device code for each at91 variant with
>> a single implementation in devices.
>>
>> Signed-off-by: Ryan Mallon <ryan at bluewatersys.com>
> 
> Nice.
> 
> A couple comments below.
> 
> [snip]
> 
>> diff --git a/arch/arm/mach-at91/at572d940hf_devices.c b/arch/arm/mach-at91/at572d940hf_devices.c
>> index 0fc20a2..12af1d5 100644
>> --- a/arch/arm/mach-at91/at572d940hf_devices.c
>> +++ b/arch/arm/mach-at91/at572d940hf_devices.c
>> @@ -35,6 +35,7 @@
>>  
>>  #include "generic.h"
>>  #include "sam9_smc.h"
>> +#include "devices.h"
>>  
>>  
>>  /* --------------------------------------------------------------------
>> @@ -138,68 +139,26 @@ void __init at91_add_device_udc(struct at91_udc_data *data) {}
>>   *  Ethernet
>>   * -------------------------------------------------------------------- */
>>  
>> -#if defined(CONFIG_MACB) || defined(CONFIG_MACB_MODULE)
>> -static u64 eth_dmamask = DMA_BIT_MASK(32);
>> -static struct at91_eth_data eth_data;
>> -
>> -static struct resource eth_resources[] = {
>> -	[0] = {
>> -		.start	= AT572D940HF_BASE_EMAC,
>> -		.end	= AT572D940HF_BASE_EMAC + SZ_16K - 1,
>> -		.flags	= IORESOURCE_MEM,
>> -	},
>> -	[1] = {
>> -		.start	= AT572D940HF_ID_EMAC,
>> -		.end	= AT572D940HF_ID_EMAC,
>> -		.flags	= IORESOURCE_IRQ,
>> -	},
> 
> [snip]
> 
>> +static struct __initdata at91_dev_table_ethernet device_eth = {
>> +	.mmio_base	= AT91SAM9260_BASE_EMAC,
>> +	.irq		= AT91SAM9260_ID_EMAC,
> 
> AT572D940HF_BASE_EMAC and AT572D940HF_ID_EMAC?

Crap. It's somehow ended up in patch 4 instead. Will fix, thanks.

> 
>> +	.rmii_pins	= eth_rmii_pins,
>> +	.nr_rmii_pins	= ARRAY_SIZE(eth_rmii_pins),
>>  };
>>
>> -void __init at91_add_device_eth(struct at91_eth_data *data)
>> -{
>> -	if (!data)
>> -		return;
>> -
>> -	if (data->phy_irq_pin) {
>> -		at91_set_gpio_input(data->phy_irq_pin, 0);
>> -		at91_set_deglitch(data->phy_irq_pin, 1);
>> -	}
>> -
>> -	/* Only RMII is supported */
>> -	data->is_rmii = 1;
> 
> How is this set for this platfrom?

By having mii_pins set to NULL. The devices.c code now does:

	if (!data->is_rmii && info->mii_pins)
		...
> 
> [snip]
> 
> diff --git a/arch/arm/mach-at91/at91sam9261_devices.c b/arch/arm/mach-at91/at91sam9261_devices.c
> index 59fc483..3c0959f 100644
> --- a/arch/arm/mach-at91/at91sam9261_devices.c
> +++ b/arch/arm/mach-at91/at91sam9261_devices.c
> @@ -1044,7 +1044,6 @@ void __init at91_set_serial_console(unsigned portnr) {}
>  void __init at91_add_device_serial(void) {}
>  #endif
>  
> -
> 
> Nit. Unrelated whitespace change.

Thanks, will clean this up.

> 
> [snip]
> 
> diff --git a/arch/arm/mach-at91/devices.c b/arch/arm/mach-at91/devices.c
> index 653e0a9..07fefc8 100644
> --- a/arch/arm/mach-at91/devices.c
> +++ b/arch/arm/mach-at91/devices.c
> 
> [snip]
> 
>> +static struct platform_device at91_eth_device = {
>> +	.name		= "macb",
>> +	.id		= -1,
>> +	.dev		= {
>> +				.dma_mask		= &eth_dmamask,
>> +				.coherent_dma_mask	= DMA_BIT_MASK(32),
>> +				.platform_data		= &eth_data,
> 
> Nit.  Excessive whitespace.

This is cut and pasted from one of the *_devices.c files so the change
is minimal.

> 
> [snip]
> 
>> +#else
>> +void __init at91_add_device_eth(struct at91_eth_data *data) {}
> 
> inline maybe?

No. This is also cut and pasted from the *_devices.c files so the change
is minimal. The compiler should out-right remove this anyway so it
shouldn't need to be inline.

~Ryan

-- 
Bluewater Systems Ltd - ARM Technology Solution Centre

Ryan Mallon         		5 Amuri Park, 404 Barbadoes St
ryan at bluewatersys.com         	PO Box 13 889, Christchurch 8013
http://www.bluewatersys.com	New Zealand
Phone: +64 3 3779127		Freecall: Australia 1800 148 751
Fax:   +64 3 3779135			  USA 1800 261 2934