Commit b22af42b authored Mar 25, 2019 by Kishon Vijay Abraham I Committed by Lorenzo Pieralisi Apr 15, 2019

PCI: keystone: Invoke phy_reset() API before enabling PHY



SERDES connected to the PCIe controller in AM654 requires
power on reset enable (POR_EN) to be set in the SERDES. The
SERDES driver sets POR_EN in the reset ops and it has to be
invoked before init or enable ops. In order for SERDES driver
to set POR_EN, invoke the phy_reset() API in pci-keystone driver.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

parent 18b0415b

drivers/pci/controller/dwc/pci-keystone.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -897,6 +897,10 @@ static int ks_pcie_enable_phy(struct keystone_pcie *ks_pcie)
		int num_lanes = ks_pcie->num_lanes;

		for (i = 0; i < num_lanes; i++) {
		ret = phy_reset(ks_pcie->phy[i]);
		if (ret < 0)
		goto err_phy;

		ret = phy_init(ks_pcie->phy[i]);
		if (ret < 0)
		goto err_phy;

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