[RESEND PATCH v2] ARM: debug: add support for Palmchip BK-310x UART

[Kevin Hilman]

Marc Gonzalez <marc_gonzalez at sigmadesigns.com> writes:

> From: Mans Rullgard <mans at mansr.com>
>
> Some SoCs use a Palmchip BK-310x UART which is mostly 16550 compatible
> but with a different register layout.

... because UART register layout is where we really need innovation. ;)

> While this UART has previously
> only been supported in MIPS based chips (Alchemy, Ralink), the ARM based
> SMP87xx series from Sigma Designs also uses it.
>
> This patch allows the debug console to work with this type of UART.
>
> Signed-off-by: Mans Rullgard <mans at mansr.com>
> Signed-off-by: Marc Gonzalez <marc_gonzalez at sigmadesigns.com>

It appears this was previously acked by Arnd also?  https://lkml.org/lkml/2015/11/9/116

> ---
> Peter, this is the patch I've been using on Tango for earlyprintk support.
> arm-soc, this is just the Nov 8 patch with my Signed-off-by tag.
> ---
>  arch/arm/Kconfig.debug            |  9 +++++++++
>  arch/arm/include/debug/palmchip.S | 11 +++++++++++
>  2 files changed, 20 insertions(+)
>  create mode 100644 arch/arm/include/debug/palmchip.S
>
> diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
> index 259c0ca9c99a..708aa9150c00 100644
> --- a/arch/arm/Kconfig.debug
> +++ b/arch/arm/Kconfig.debug
> @@ -1304,6 +1304,7 @@ config DEBUG_SIRFSOC_UART
>  config DEBUG_LL_INCLUDE
>  	string
>  	default "debug/sa1100.S" if DEBUG_SA1100
> +	default "debug/palmchip.S" if DEBUG_UART_8250_PALMCHIP

minor nit: We're trying (not always with great success) to keep various
parts of this file sorted alphanumerically.  Can you please insert the
new entries accordingly?

Otherwise looks good to me,

Acked-by: Kevin Hilman <khilman at baylibre.com>

Kevin