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

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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>
This commit is contained in:
Kishon Vijay Abraham I 2019-03-25 15:09:36 +05:30 committed by Lorenzo Pieralisi
parent 18b0415bc8
commit b22af42b3e
1 changed files with 4 additions and 0 deletions
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4
drivers/pci/controller/dwc/pci-keystone.c
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@ -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;