Re: [Xen-devel] [PATCH] xen/arm: add OMAP5432 UART support for early_printk

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Thu, 2013-06-27 at 15:20 +0800, Chen Baozi wrote:
> To enable it, add "CONFIG_EARLY_PRINTK := omap5432" to Config.mk

From the register offsets this looks like it might be a somewhat 8250
compatible UART logic block?

Bamvor also implemented a driver for an 8250 like device on the
sun6i[0]. Rather than having multiple drivers for similar platforms I
asked him to produce a single configurable 8250 driver. Perhaps you
could work together to make sure this works for you both?

Thanks,
Ian.

[0] see "xen/arm: introduce Allwinner sun6i SOC basic support"
<1370004814-30686-3-git-send-email-bjzhang@xxxxxxxx>.

> +ifeq ($(CONFIG_EARLY_PRINTK), omap5432)
> +EARLY_PRINTK_INC := omap
> +EARLY_PRINTK_INIT_UART := y

Does your bootloader not setup the UART? Preferably we would simply
inherit that setup (avoids more code and mismatched baud rate etc).

Ian.


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