[PATCH v2 1/7] PCI: qcom: fix parsing of PERST# in the legacy case

[Bartosz Golaszewski]

On Mon, 8 Jun 2026 08:59:19 +0200, Dmitry Baryshkov
<dmitry.baryshkov at oss.qualcomm.com> said:
> Commit deed8aec62dc ("PCI: qcom: Handle mixed PERST#/PHY DT
> configuration") fixed support for the "mixed" platforms which declare
> PERST# pin the RC node and the PHY in the RP node, however it also broke
> support for a majority of existing platforms, which declare both PERST#
> and PHY in the RC node, because now PERST# is first acquired in
> qcom_pcie_parse_ports(), which then returns -ENODEV (as there are no
> PHYs in the RP nodes). Later qcom_pcie_parse_legacy_binding() tries to
> acquire the PERST# GPIO again and fails with -EBUSY (as the GPIO has
> already been requested).
>
> Move parsing of RC's perst-gpios to qcom_pcie_probe(), making it obvious
> that it's shared for both cases and skip parsing it in both functions.
>
> Fixes: deed8aec62dc ("PCI: qcom: Handle mixed PERST#/PHY DT configuration")
> Closes: https://lore.kernel.org/r/gieaybsg2ckxpctvqj77nlwu7utama2yeyvebkonmexsxrra3v@v3fobqasxnmy/
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at oss.qualcomm.com>
> ---

Acked-by: Bartosz Golaszewski <bartosz.golaszewski at oss.qualcomm.com>