PCI: rcar-gen4: set ep BAR4 fixed size

On rcar-gen4, the ep BAR4 has a fixed size of 256B. Document this
constraint in the epc features of the platform.

Fixes: e311b3834dfa ("PCI: rcar-gen4: Add endpoint mode support")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://patch.msgid.link/20250328-rcar-gen4-bar4-v1-1-10bb6ce9ee7f@baylibre.com

diff --git a/drivers/pci/controller/dwc/pcie-rcar-gen4.c b/drivers/pci/controller/dwc/pcie-rcar-gen4.c
index fc872dd35029c083da58144dce23cd1ce80f9374..02638ec442e7012d61dfad70016077d9becf56a6 100644 (file)
--- a/drivers/pci/controller/dwc/pcie-rcar-gen4.c
+++ b/drivers/pci/controller/dwc/pcie-rcar-gen4.c
@@ -403,6 +403,7 @@ static const struct pci_epc_features rcar_gen4_pcie_epc_features = {
        .msix_capable = false,
        .bar[BAR_1] = { .type = BAR_RESERVED, },
        .bar[BAR_3] = { .type = BAR_RESERVED, },
+       .bar[BAR_4] = { .type = BAR_FIXED, .fixed_size = 256 },
        .bar[BAR_5] = { .type = BAR_RESERVED, },
        .align = SZ_1M,
 };