linux-kernel - Re: [PATCH 19/22] ARM: sunxi: Add earlyprintk support using R

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 26 May 2014 17:25:43 +0800
From:	Chen-Yu Tsai <wens@...e.org>
To:	Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Mike Turquette <mturquette@...aro.org>,
	Emilio Lopez <emilio@...pez.com.ar>,
	Linus Walleij <linus.walleij@...aro.org>,
	linux-serial@...r.kernel.org,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	devicetree <devicetree@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Hans de Goede <hdegoede@...hat.com>,
	Boris BREZILLON <boris.brezillon@...e-electrons.com>,
	Luc Verhaegen <libv@...net.be>
Subject: Re: [PATCH 19/22] ARM: sunxi: Add earlyprintk support using R_UART (sun6i/sun8i)

On Mon, May 26, 2014 at 2:46 AM, Maxime Ripard
<maxime.ripard@...e-electrons.com> wrote:
> Hi,
>
> On Fri, May 23, 2014 at 03:51:22PM +0800, Chen-Yu Tsai wrote:
>> sun6i/sun8i have a UART in the RTC block group, which can be used
>> as an early console. This is most useful on sun8i as UART0 is muxed
>> with MMC0, which is not available if we boot from MMC.
>>
>> Signed-off-by: Chen-Yu Tsai <wens@...e.org>
>> ---
>>  arch/arm/Kconfig.debug | 10 ++++++++++
>>  1 file changed, 10 insertions(+)
>>
>> diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
>> index eab8ecb..9e22708 100644
>> --- a/arch/arm/Kconfig.debug
>> +++ b/arch/arm/Kconfig.debug
>> @@ -694,6 +694,14 @@ choice
>>                 Say Y here if you want kernel low-level debugging support
>>                 on Allwinner A1X based platforms on the UART1.
>>
>> +     config DEBUG_SUNXI_R_UART
>> +             bool "Kernel low-level debugging messages via sunXi R_UART"
>> +             depends on ARCH_SUNXI
>
> It should rather depend on MACH_SUN8I.

I assume no sun6i devices would use it, or have pads available for it?
If so, then MACH_SUN8I makes sense.


ChenYu
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/