Re: [PATCH v3 0/7] PCI: brcmstb: Re-submit reverted patchset

From: Jim Quinlan
Date: Tue Jul 26 2022 - 21:01:46 EST


On Tue, Jul 26, 2022 at 6:03 PM Bjorn Helgaas <helgaas@xxxxxxxxxx> wrote:
>
> On Mon, Jul 25, 2022 at 11:12:49AM -0400, Jim Quinlan wrote:
> > ...
> > Jim Quinlan (7):
> > PCI: brcmstb: Remove unnecessary forward declarations
> > PCI: brcmstb: Split brcm_pcie_setup() into two funcs
> > PCI: brcmstb: Gate config space access on link status
> > PCI: brcmstb: Add mechanism to turn on subdev regulators
> > PCI: brcmstb: Add control of subdevice voltage regulators
> > PCI: brcmstb: Do not turn off WOL regulators on suspend
> > PCI: brcmstb: Have .map_bus function names end with 'map_bus'
> >
> > drivers/pci/controller/pcie-brcmstb.c | 476 ++++++++++++++++++--------
> > 1 file changed, 341 insertions(+), 135 deletions(-)
>
> I reworked these and put them on pci/ctrl/brcm for v5.20. This is a
> proposal, not something set in stone. But time is of the essence to
> figure out how we want to proceed.
>
> I changed a lot of stuff and it's likely I broke something in the
> process, so please take a look and test this out. Here's an outline
> of what I changed:
>
> - Moved the config access "link up" check earlier because it's not
> related to the power regulator patches.
>
> - Changed config access "link up" checks to use PCIE_ECAM_REG()
> instead of hard-coding 0xfff masks. The 32-bit accessors already
> mask out the low two bits, so we don't need to do that here.
>
> - Squashed pci_subdev_regulators_add_bus() directly into
> brcm_pcie_add_bus() for readability. Similarly for
> pci_subdev_regulators_remove_bus().
>
> - This makes a clear split between:
>
> * A patch that adds get/enable of regulators, and starting the
> link after enabling regulators, and
>
> * A patch that disables/enables regulators for suspend/resume.
>
> - Since we only support one set of subregulator info (for one Root
> Port, and brcm_pcie_suspend_noirq() depends on this since it uses
> the pcie->sr pointer), use pcie->sr always instead of
> dev->driver_data.
>
> - Squashed wakeup device checking into the suspend/resume patch so
> there's not a time when suspend might turn off power to a wakeup
> device.
>
> - Renamed brcm_pcie_map_bus32() to brcm7425_pcie_map_bus() so it
> ends in "_map_bus()" like other drivers. Also,
> brcm7425_pcie_map_bus() doesn't actually depend on the 32-bitness.

Hi Bjorn,
Sorry, it seems that some of my future commits have somehow bled code
into the driver (e.g. "has_phy").
LGTM.

Thanks and regards,
Jim Quinlan
Broadcom STB

>
> Bjorn