[U-Boot] [UBOOT PATCH v1 0/2] Add ACPI table support on Minnowmax

[Bin Meng]

Hi Stefan,

On Fri, Mar 18, 2016 at 8:01 PM, Stefan Roese <sr at denx.de> wrote:
> Hi Saket,
>
>
> On 30.08.2015 02:10, Saket Sinha wrote:
>>
>> This series adds ACPI table support on Minnowmax.
>>
>> Saket Sinha (2):
>>    x86: Add ACPI table support to Minnowmax
>>    x86: Add DSDT table for supporting ACPI on Minnowmax
>>
>>   board/intel/minnowmax/Makefile              |   1 +
>>   board/intel/minnowmax/acpi.c                | 234
>> +++++++++++++++++++++++
>>   board/intel/minnowmax/acpi/cpu.asl          |  65 +++++++
>>   board/intel/minnowmax/acpi/device_nvs.asl   |  75 ++++++++
>>   board/intel/minnowmax/acpi/globalnvs.asl    |  88 +++++++++
>>   board/intel/minnowmax/acpi/mainboard.asl    |  13 ++
>>   board/intel/minnowmax/acpi/platform.asl     |  62 ++++++
>>   board/intel/minnowmax/acpi/sleepstates.asl  |  14 ++
>>   board/intel/minnowmax/acpi/southcluster.asl | 286
>> ++++++++++++++++++++++++++++
>>   board/intel/minnowmax/dsdt.asl              |  46 +++++
>>   10 files changed, 884 insertions(+)
>>   create mode 100644 board/intel/minnowmax/acpi.c
>>   create mode 100644 board/intel/minnowmax/acpi/cpu.asl
>>   create mode 100644 board/intel/minnowmax/acpi/device_nvs.asl
>>   create mode 100644 board/intel/minnowmax/acpi/globalnvs.asl
>>   create mode 100644 board/intel/minnowmax/acpi/mainboard.asl
>>   create mode 100644 board/intel/minnowmax/acpi/platform.asl
>>   create mode 100644 board/intel/minnowmax/acpi/sleepstates.asl
>>   create mode 100644 board/intel/minnowmax/acpi/southcluster.asl
>>   create mode 100644 board/intel/minnowmax/dsdt.asl
>
>
> I'm interested in ACPI support for BayTrail (e.g. MinnowMAX). And
> noticed that you didn't follow up on this MinnowMAX ACPI support
> thread. In another patchset by Miao (added to Cc), ACPI support has
> now been added for QEMU already:
>
> https://www.mail-archive.com/u-boot@lists.denx.de/msg200312.html
>
> So what is the current status of ACPI for x86 in U-Boot? Is someone

So far the only working ACPI support for x86 in U-Boot is QEMU, with fw_cfg.

> currently working on BayTrail / MinnowMAX ACPI support? If yes,
> please let me know so that we can combine our efforts. If not, please
> give me some hints on how to best start / continue here. Why did this
> patchset from Saket not make it into mainline? What are the main
> flaws / problems?

Saket's patch does not get ACPI fully working on MinnowMAX. And I
guess he has stopped working on this, Simon?

>
> Any hints or suggestions welcome! :)
>

To support ACPI on real boards, the main task is to write ASL files to
describe the on-board devices, using AML language. We can take most of
these from coreboot though. The other part is to program these ACPI
registers as required by the spec.

Regards,
Bin