1046A pcie ,Failed to enable MSI

[xinchen3]

i use pcie3: pcie@3600000 x2 gen2,and want to enable MSI to apply other driver(qcom mhi),How do I configure my platform's dts file? thanks!

pcie@3600000 {

            compatible = "fsl,ls1046a-pcie", "snps,dw-pcie";

            reg = <0x00 0x03600000 0x0 0x00100000   /* controller registers */

                   0x50 0x00000000 0x0 0x00002000>; /* configuration space */

            reg-names = "regs", "config";

            interrupts = <GIC_SPI 162 IRQ_TYPE_LEVEL_HIGH>, /* controller interrupt */

                     <GIC_SPI 161 IRQ_TYPE_LEVEL_HIGH>; /* PME interrupt */

            interrupt-names = "aer", "pme";

            #address-cells = <3>;

            #size-cells = <2>;

            device_type = "pci";

            dma-coherent;

            iommu-map = <0 &smmu 0 1>;

            bus-range = <0x0 0xff>;

            ranges = <0x81000000 0x0 0x00000000 0x50 0x00010000 0x0 0x00010000   /* downstream I/O */

                  0x82000000 0x0 0x40000000 0x50 0x40000000 0x0 0x40000000>; /* non-prefetchable memory */

            msi-parent = <&msi3>, <&msi1>, <&msi2>;

            #interrupt-cells = <1>;

            interrupt-map-mask = <0 0 0 7>;

            interrupt-map = <0000 0 0 1 &gic GIC_SPI 154 IRQ_TYPE_LEVEL_HIGH>,

                    <0000 0 0 2 &gic GIC_SPI 154 IRQ_TYPE_LEVEL_HIGH>,

                    <0000 0 0 3 &gic GIC_SPI 154 IRQ_TYPE_LEVEL_HIGH>,

                    <0000 0 0 4 &gic GIC_SPI 154 IRQ_TYPE_LEVEL_HIGH>;

            status = "disabled";

        };

[yang-]

Hi chenxin

I have the same problem about pcie-MSI of ls1046 as you, How did you finally solve it? looking forward to your help~

Thanks~

[yipingwang]

Hello xinchen3,

I discussed with LSDK development team. No need to modify dts file to enable MSI, for PCIe device driver development you could refer to drivers/net/ethernet/intel/e1000e/netdev.c.

Thanks,

Yiping