PCI: rcar-gen4: Add support for R-Car X5H PCIe4

Add support for R8A78000 (R-Car X5H) PCIe4.

This driver previously supported R-Car Gen4 S4/V4H/V4M. PCIe features
of R-Car X5H PCIe4 are almost all the same. The controller initialization
sequence is slightly different and is factored out into controller-specific
callbacks, in a manner similar to previous R-Car Gen4 handling.

The controller does have a PHY attached to it, but the PHY is operated
by a separate PHY driver. The PHY driver instance binding is handled
in rcar_gen4_pcie_get_resources() and controlled in the aforementioned
controller-specific callbacks.

The controller driver is deliberately using "renesas,rcar-gen5-pcie4"
DT compatible string to discern R-Car X5H PCIe4 controller supported
by this driver, from R-Car X5H PCIe6 controller which will most likely
use a separate driver.

The R-Car X5H PCIe4 controller embeds HDMA instead of EDMA embedded
in the R-Car Gen4 PCIe controller, "dw-edma" driver supports both
DMA variants.

Endpoint mode is currently not implemented for R-Car Gen5 PCIe4.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20260921202823.72620-7-marek.vasut+renesas@mailbox.org

0 files changed, 0 insertions, 0 deletions