linux-kernel - Re: [PATCH 5/6] ARM: dts: rockchip: add reboot mode node

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Date:	Tue, 22 Dec 2015 17:04:42 +0800
From:	Andy Yan <andy.yan@...k-chips.com>
To:	Naoki FUKAUMI <naobsd@...il.com>
Cc:	robh+dt@...nel.org, heiko@...ech.de, arnd@...db.de,
	john.stultz@...aro.org, mark.rutland@....com,
	geert+renesas@...der.be, catalin.marinas@....com,
	will.deacon@....com, linux-kernel@...r.kernel.org,
	alexandre.belloni@...e-electrons.com, lorenzo.pieralisi@....com,
	linux@....linux.org.uk, dbaryshkov@...il.com,
	linux-rockchip@...ts.infradead.org, joel@....id.au,
	treding@...dia.com, wxt@...k-chips.com, devicetree@...r.kernel.org,
	khilman@...aro.org, pawel.moll@....com,
	ijc+devicetree@...lion.org.uk, akpm@...ux-foundation.org,
	linux-arm-kernel@...ts.infradead.org, moritz.fischer@...us.com,
	gregkh@...uxfoundation.org, sjg@...omium.org, sre@...nel.org,
	galak@...eaurora.org, olof@...om.net, jun.nie@...aro.org
Subject: Re: [PATCH 5/6] ARM: dts: rockchip: add reboot mode node

Hi,

On 2015年12月22日 11:04, Naoki FUKAUMI wrote:
> hi,
>
> On Mon, Dec 21, 2015 at 8:42 PM, Andy Yan<andy.yan@...k-chips.com>  wrote:
>> Add reboot mode driver DT node for rk3xxx,rk3288 platform
>>
>> Signed-off-by: Andy Yan<andy.yan@...k-chips.com>
>> ---
>>
>>   arch/arm/boot/dts/rk3288.dtsi                | 25 +++++++++++++++++++++++
>>   arch/arm/boot/dts/rk3xxx.dtsi                | 26 ++++++++++++++++++++++++
>>   include/dt-bindings/soc/rockchip_boot-mode.h | 30 ++++++++++++++++++++++++++++
>>   3 files changed, 81 insertions(+)
>>   create mode 100644 include/dt-bindings/soc/rockchip_boot-mode.h
>>
>> diff --git a/arch/arm/boot/dts/rk3288.dtsi b/arch/arm/boot/dts/rk3288.dtsi
>> index 04ea209..937ba4c 100644
>> --- a/arch/arm/boot/dts/rk3288.dtsi
>> +++ b/arch/arm/boot/dts/rk3288.dtsi
>> @@ -170,6 +170,31 @@
>>                  };
>>          };
>>
>> +       reboot_mode {
>> +               compatible = "rockchip,reboot-mode";
>> +               rockchip,regmap = <&pmu>;
>> +               offset = <0x94>;
>> +               loader {
>> +                       linux,mode = "loader";
>> +                       linux,magic = <0x5242C301>;
>> +               };
>> +
>> +               maskrom {
>> +                       linux,mode = "maskrom";
>> +                       linux,magic = <0x5242C302>;
>> +               };
>> +
>> +               recovery {
>> +                       linux,mode = "recovery";
>> +                       linux,magic = <0x5242C303>;
>> +               };
>> +
>> +               fastboot {
>> +                       linux,mode = "fastboot";
>> +                       linux,magic = <0x5242C309>;
>> +               };
>> +       };
>> +
> (snip)
>
> I sometimes use 0xEF08A53C to load bootloader from SD card instead of
> on-board flash memory such as eMMC.
>   https://github.com/linux-rockchip/u-boot-rockchip/blob/u-boot-rk3288/common/cmd_rockusb.c#L893
>
> I don't know any detail about this function.
> (above code says "reboot to maskrom", but it should be wrong from my experience)
>
> do you know something about this function? can you handle this too?
>
> Regards,
>
>
>
  Have some discussion with the bootloader engineer, the correct magic  
number to
  reboot the system to maskrom mode is 0xEF08A53C. I will  fix it in 
next version.

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