Merge branch 'remotes/lorenzo/pci/aardvark' (7546ad5e) · Commits · 戴 / test

drivers/pci/controller/pci-aardvark.c

+8 −1

Original line number	Diff line number	Diff line
		@@ -252,7 +252,14 @@ static void advk_pcie_issue_perst(struct advk_pcie *pcie)
		if (!pcie->reset_gpio)
		return;

		/* PERST does not work for some cards when link training is enabled */
		/*
		* As required by PCI Express spec (PCI Express Base Specification, REV.
		* 4.0 PCI Express, February 19 2014, 6.6.1 Conventional Reset) a delay
		* for at least 100ms after de-asserting PERST# signal is needed before
		* link training is enabled. So ensure that link training is disabled
		* prior de-asserting PERST# signal to fulfill that PCI Express spec
		* requirement.
		*/
		reg = advk_readl(pcie, PCIE_CORE_CTRL0_REG);
		reg &= ~LINK_TRAINING_EN;
		advk_writel(pcie, reg, PCIE_CORE_CTRL0_REG);