On Mon, Jun 17, 2019 at 11:09:51PM +0530, Manikanta Maddireddy wrote: > 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, make sure that DT property is not > missed for such platforms. > > Signed-off-by: Manikanta Maddireddy <mmaddireddy@xxxxxxxxxx> > --- > V5: > * Updated reset gpio toggle logic to reflect active low usage > * Replaced kasprintf() with devm_kasprintf() > * Updated commit message with more information. > > V4: Using devm_gpiod_get_from_of_node() to get reset-gpios > > V3: Using helper function to get reset-gpios > > V2: Using standard "reset-gpio" property > > drivers/pci/controller/pci-tegra.c | 45 ++++++++++++++++++++++++++---- > 1 file changed, 39 insertions(+), 6 deletions(-) Acked-by: Thierry Reding <treding@xxxxxxxxxx>
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