Re: [PATCH v1 00/15] create power sequencing subsystem

Dmitry Baryshkov
2022-10-19T06:03:48Z

Ho,

On Thu, 13 Oct 2022 at 22:50, Matthias Kaehlcke <mka@chromium.org> wrote:
> Do you still plan to refresh this series?
>
> I know there have been multiple attempts to get something similar
> landed in the past 10 year or so. Your series didn't seem to get
> much pushback from maintainers, might be worth sending a refresh :)

Yes, I hope to return to it eventually. I just had no time for it lately.

> On Wed, Oct 06, 2021 at 06:53:52AM +0300, Dmitry Baryshkov wrote:
> > This is a proposed power sequencer subsystem. This is a
> > generification of the MMC pwrseq code. The subsystem tries to abstract
> > the idea of complex power-up/power-down/reset of the devices.
> >
> > The primary set of devices that promted me to create this patchset is
> > the Qualcomm BT+WiFi family of chips. They reside on serial+platform
> > or serial + SDIO interfaces (older generations) or on serial+PCIe (newer
> > generations). They require a set of external voltage regulators to be
> > powered on and (some of them) have separate WiFi and Bluetooth enable
> > GPIOs.
> >
> > The major drawback for now is the lack of proper PCIe integration
> > At this moment support for PCIe is hacked up to be able to test the
> > PCIe part of qca6390. Proper PCIe support would require automatically
> > powering up the devices before the scan basing on the proper device
> > structure in the device tree. This two last patches are noted as WIP and
> > are included into the patchset for the purpose of testing WiFi on newer
> > chips (like qca6390/qca6391).
> >
> > Changes since RFC v2:
> > - Add documentation for the pwrseq code. Document data structures,
> > macros and exported functions.
> > - Export of_pwrseq_xlate_onecell()
> > - Add separate pwrseq_set_drvdata() function to follow the typical API
> > design
> > - Remove pwrseq_get_optional()/devm_pwrseq_get_optional()
> > - Moved code to handle old mmc-pwrseq binding to the MMC patch
> > - Split of_pwrseq_xlate_onecell() support to a separate patch
> >
> > Changes since RFC v1:
> > - Provider pwrseq fallback support
> > - Implement fallback support in pwrseq_qca.
> > - Mmove susclk handling to pwrseq_qca.
> > - Significantly simplify hci_qca.c changes, by dropping all legacy
> > code. Now hci_qca uses only pwrseq calls to power up/down bluetooth
> > parts of the chip.
> >
> >
> >
> >
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--
With best wishes
Dmitry