[U-Boot] [PATCH v6 00/15] Add PSCI support for Jetson TK1/Tegra124 + CNTFRQ fix

Jan Kiszka
2015-04-14T14:45:32Z

On 2015-04-14 16:40, Ian Campbell wrote:
> On Tue, 2015-04-14 at 16:33 +0200, Jan Kiszka wrote:
>> On 2015-04-14 16:30, Ian Campbell wrote:
>>> On Tue, 2015-04-14 at 16:12 +0200, Jan Kiszka wrote:
>>>> On 2015-04-14 16:06, Stephen Warren wrote:
>>>>> On 04/14/2015 07:46 AM, Tom Rini wrote:
>>>>>> On Mon, Apr 13, 2015 at 06:48:05AM +0200, Jan Kiszka wrote:
>>>>>>
>>>>>>> Changes in v6:
>>>>>>> - rebased over master
>>>>>>> - included Thierry's SMMU enabling patch
>>>>>>> - moved activation patch at the end so that it can be held back
>>>>>>>
>>>>>>> This version can also be found at
>>>>>>> https://github.com/siemens/u-boot/tree/jetson-tk1-v6.
>>>>>>
>>>>>> So what level of coordination do we need on applying this series so that
>>>>>> kernels (both old and new) can continue to function? And perhaps README
>>>>>> updates or similar? Thanks!
>>>>>
>>>>> Hopefully this series doesn't change anything by default, and simply
>>>>> allows people to turn on support for booting kernels in non-secure mode
>>>>> if they want to? If so, there shouldn't be any co-ordination required.
>>>>> If it changes the default behaviour, co-ordination is probably required,
>>>>> and that'd be a bad thing.
>>>>
>>>> Sorry, forgot to mention: I can't flip the default behaviour to leave
>>>> virtualization support off only for the TK1. That's a generic default.
>>>
>>> Would enabling it in the compile but adding "bootm_boot_mode=sec" to the
>>> default environment (so it isn't used by default) be considered
>>> sufficiently backwards compatible?
>>
>> Can this be done selectively for the TK1 only?
>
> Well, you might need to add the mechanism for inserting it into the
> default bootenv, but I don't think that should be too hard at either the
> tegra or more generic levels.

Maybe this already works:

diff --git a/include/configs/tegra-common-post.h b/include/configs/tegra-common-post.h
index c3ad8be..c1f6c24 100644
--- a/include/configs/tegra-common-post.h
+++ b/include/configs/tegra-common-post.h
@@ -56,6 +56,7 @@
"fdt_high=ffffffff\0" \
"initrd_high=ffffffff\0" \
BOOTENV \
+ "bootm_boot_mode=sec\0" \
BOARD_EXTRA_ENV_SETTINGS

#if defined(CONFIG_TEGRA20_SFLASH) || defined(CONFIG_TEGRA20_SLINK) || defined(CONFIG_TEGRA114_SPI)

Will test later.

Jan

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