PCI: tegra: Add support for GPIO based PERST#

Tegra PCIe has fixed per port SFIO line to signal PERST#, which can be
controlled by AFI port register. However, if a platform routes a
different GPIO to the PCIe slot, then port register cannot control it.
Add support for GPIO based PERST# signal for such platforms. GPIO number
comes from per port PCIe device tree node. PCIe driver probe doesn't
fail if per port "reset-gpios" property is not populated, so platforms
that require this workaround must make sure that the DT property is not
missed in the corresponding device tree.

Link: https://lore.kernel.org/linux-pci/[email protected]/
Signed-off-by: Manikanta Maddireddy <[email protected]>
[[email protected]: squashed in fix in Link]
Signed-off-by: Lorenzo Pieralisi <[email protected]>
Acked-by: Thierry Reding <[email protected]>

0 files changed, 0 insertions, 0 deletions