[U-Boot] [PATCH] serial: 16550: Add JZ47xx support

[Daniel Schwierzeck <daniel.schwierzeck@gmail.com>]

Am 25.05.2016 um 02:19 schrieb Marek Vasut:
> The Ingenic JZ47xx requires special bit (UART_EN) set in FCR register
> in order to work at all. Add this special case handling into the driver.
> 
> Signed-off-by: Marek Vasut <marex@denx.de>
> Cc: Tom Rini <trini@konsulko.com>
> Cc: Simon Glass <sjg@chromium.org>
> Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
> Cc: Paul Burton <paul.burton@imgtec.com>
> ---
>  drivers/serial/ns16550.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c
> index 30ba0aa..1323881 100644
> --- a/drivers/serial/ns16550.c
> +++ b/drivers/serial/ns16550.c
> @@ -50,6 +50,14 @@ DECLARE_GLOBAL_DATA_PTR;
>  #endif
>  #endif
>  
> +#ifdef CONFIG_ARCH_JZ47XX
> +#undef UART_FCRVAL
> +/* Ingenic JZ47xx SoCs require that a 'UART Module Enable' bit be set */
> +#define UART_FCR_UME		0x10
> +#define UART_FCRVAL (UART_FCR_FIFO_EN | UART_FCR_RXSR |	\
> +		     UART_FCR_TXSR | UART_FCR_UME)
> +#endif

I think this could be added as DT property

> +
>  #ifndef CONFIG_SYS_NS16550_IER
>  #define CONFIG_SYS_NS16550_IER  0x00
>  #endif /* CONFIG_SYS_NS16550_IER */
> 

-- 
- Daniel

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