Commit d76a6ed0 authored by Pali Rohár's avatar Pali Rohár Committed by Lorenzo Pieralisi
Browse files

PCI: mvebu: Update comment for PCI_EXP_LNKCAP register on emulated bridge 

Reason for clearing this bit is because mvebu hw returns incorrectly this bit set to 1.

Link: https://lore.kernel.org/r/20220104153529.31647-10-pali@kernel.org


Signed-off-by: default avatarPali Rohár <pali@kernel.org>
Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
parent 16038ebb

drivers/pci/controller/pci-mvebu.c

+2 −2
Original line number Diff line number Diff line
@@ -546,8 +546,8 @@ mvebu_pci_bridge_emul_pcie_conf_read(struct pci_bridge_emul *bridge, 


	case PCI_EXP_LNKCAP:

		/*

		 * PCIe requires the clock power management capability to be

		 * hard-wired to zero for downstream ports

		 * PCIe requires that the Clock Power Management capability bit

		 * is hard-wired to zero for downstream ports but HW returns 1.

		 */

		*value = mvebu_readl(port, PCIE_CAP_PCIEXP + PCI_EXP_LNKCAP) &

			 ~PCI_EXP_LNKCAP_CLKPM;