[PATCH V2 0/8] serial: at91: make usart and uart support dma transfer

[Jean-Christophe PLAGNIOL-VILLARD]

On 10:43 Tue 16 Jul     , Elen Song wrote:
> After at91sam9g45 socs, the usart only support dma transfer.
> This patch serial focus on:
> 1) distinguish pdc and dma transfer
> 2) support usart dma rx and tx transfer
> 3) distinguish usart and uart
> 4) support uart dma rx and tx transfer
> 
> For those only support PDC transfer socs, we use "atmel,use-dma-rx/tx" to establish a PDC transfer.
> For those only support DMA transfer socs, we not only use "atmel,use-dma-rx/tx", but also describe dma binding to establish a DMA transfer. 
> We switch the name from "use-dma" to "use-pdc" in serial driver to state more clearly.
> We also distinguish usart and uart by read ip name, the dbgu is regard as a uart.
> Because uart lack timeout function, we use software timer to trigger rx.
> 
> Compare to v1, this patch serials improve:
> 1) use function pointer instead of if/else
> 2) "atmel,use-dma-rx/tx" represent a PDC transfer,
>    but when add the dma bindings, it is a dma transfer
> 3) do not use strncmp in get ip name
> 4) remove modification in documentation part

please next time update this too when sending a new verison as I was nearly
NACKing it as I thought it was the same version

Please be carefull next time

Best Regards,
J.
> 
> Elen Song (7):
>   serial: at91: correct definition from DMA to PDC
>   serial: at91: add tx dma support
>   serial: at91: add rx dma support
>   serial: at91: make DBGU support dma and pdc transfers
>   serial: at91: distinguish usart and uart
>   serial: at91: modify UART to use software timer to trigger rx
>   serial: at91: add dma support in usart binding descriptions
> 
>  Documentation/devicetree/bindings/serial/rs485.txt |    4 +-
>  .../devicetree/bindings/tty/serial/atmel-usart.txt |   29 +-
>  arch/arm/boot/dts/at91rm9200.dtsi                  |   16 +-
>  arch/arm/boot/dts/at91sam9260.dtsi                 |   24 +-
>  arch/arm/boot/dts/at91sam9263.dtsi                 |   12 +-
>  arch/arm/boot/dts/at91sam9g45.dtsi                 |   16 +-
>  arch/arm/mach-at91/at91rm9200_devices.c            |   20 +-
>  arch/arm/mach-at91/at91sam9260_devices.c           |   28 +-
>  arch/arm/mach-at91/at91sam9261_devices.c           |   16 +-
>  arch/arm/mach-at91/at91sam9263_devices.c           |   16 +-
>  arch/arm/mach-at91/at91sam9g45_devices.c           |   20 +-
>  arch/arm/mach-at91/at91sam9rl_devices.c            |   20 +-
>  drivers/tty/serial/atmel_serial.c                  |  582 ++++++++++++++++++--
>  include/linux/atmel_serial.h                       |    2 +
>  include/linux/platform_data/atmel.h                |    2 +
>  15 files changed, 665 insertions(+), 142 deletions(-)
> 
> -- 
> 1.7.9.5
>