Re: [PATCH 28/28] usb: musb: fallback to static method if only one type of DMA is defined

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2010/12/13 Sergei Shtylyov <sshtylyov@xxxxxxxxxx>:
> Hello.
>
> On 12-12-2010 20:02, tom.leiming@xxxxxxxxx wrote:
>
>> From: Ming Lei<tom.leiming@xxxxxxxxx>
>
>> If only one DMA type for musb is defined, we always use
>> this DMA type.
>
>> Signed-off-by: Ming Lei<tom.leiming@xxxxxxxxx>
>
> [...]
>
>> diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h
>> index 97b9760..e233678 100644
>> --- a/drivers/usb/musb/musb_core.h
>> +++ b/drivers/usb/musb/musb_core.h
>> @@ -695,20 +695,31 @@ static inline const char *get_dma_name(struct musb
>> *musb)
>>  }
>>
>>  #ifdef CONFIG_USB_INVENTRA_DMA
>> +#if !defined(CONFIG_USB_TI_CPPI_DMA) &&
>> !defined(CONFIG_USB_TUSB_OMAP_DMA)
>> +#define        is_inventra_dma(musb)   1
>> +#else
>>  #define       is_inventra_dma(musb)   (musb->ops->flags &
>> MUSB_GLUE_DMA_INVENTRA)
>> +#endif
>>  #else
>>  #define       is_inventra_dma(musb)   0
>>  #endif
>>
>>  #ifdef CONFIG_USB_TI_CPPI_DMA
>> +#if !defined(CONFIG_USB_INVENTRA_DMA) &&
>> !defined(CONFIG_USB_TUSB_OMAP_DMA)
>> +#define        is_cppi_enabled(musb)   1
>> +#else
>>  #define       is_cppi_enabled(musb)   (musb->ops->flags &
>> MUSB_GLUE_DMA_CPPI)
>> -
>> +#endif
>>  #else
>>  #define       is_cppi_enabled(musb)   0
>>  #endif
>>
>>  #ifdef CONFIG_USB_TUSB_OMAP_DMA
>> +#if !defined(CONFIG_USB_INVENTRA_DMA) && !defined(CONFIG_USB_TI_CPPI_DMA)
>> +#define tusb_dma_omap(musb)                    1
>> +#else
>>  #define tusb_dma_omap(musb)                   (musb->ops->flags &
>> MUSB_GLUE_DMA_TUSB)
>> +#endif
>>  #else
>>  #define tusb_dma_omap(musb)                   0
>>  #endif
>
>   This doesn't really scale.

Sorry, could you explain it in more detail so that I can grasp your idea?

thanks,
-- 
Lei Ming
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