[PATCH v2 0/3] watchdog: K3: Add RTI watchdog support

[Lokesh Vutla]

Hi Jan,

On 11/08/20 6:07 pm, Jan Kiszka wrote:
> On 11.08.20 12:46, Lokesh Vutla wrote:
>>
>>
>> On 11/08/20 4:12 pm, Jan Kiszka wrote:
>>> On 11.08.20 12:33, Lokesh Vutla wrote:
>>>>
>>>>
>>>> On 23/06/20 4:45 pm, Jan Kiszka wrote:
>>>>> This brings watchdog support for the TI K3 SoCs, derived from the Linux
>>>>> kernel, augmented with firmware loading as needed on the AM65x.
>>>>>
>>>>> Tested on the AM65x EVM and the IOT2050 (also AM65x-based, upstream
>>>>> support will be posted soon).
>>>>>
>>>>> Changes in v2:
>>>>>    - keep watchdog powered when handing over to Linux
>>>>>    - drop unneeded explicit power-on
>>>>>    - account for RTI firmware locking the power domain
>>>>
>>>> Patch 1 and 3 merged applied.
>>>>
>>>
>>> Thanks. Still taking workable suggestions for loading the firmware.
>>
>> FIT image is the one that I can think off. Since SPL is loading the FIT image,
>> SPL_HANDOFF can be used to pass on the loadaddr from SPL to U-Boot and U-Boot
>> can start the remote cores using this info.
> 
> OK, just the ensure I got the idea correctly:
> 
>  - extend struct spl_handoff or arch_spl_handoff with the fit image
>    loadaddr that spl is processing

Yes

> 
>  - stick the watchdog firmware into the u-boot proper fit image
>    (generated by tools/k3_fit_atf.sh or shipped via the board folder, as
>    in our case)

IMHO, not via board folder. k3_fit_atf is used to generate a53 spl images. May
be create a new one that packs fit image with u-boot and firmware. Or can you
check if binman in u-boot works for you?

> 
>  - from the watchdog driver, trigger parsing of that fit image and
>    extracting of the firmware from there

Yes

Thanks and regards,
Lokesh

> 
> Jan
>