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[15/24] PCI: keystone: Invoke phy_reset API before enabling PHY

Message ID 20190114132424.6445-16-kishon@ti.com
State Superseded
Headers show
Series [01/24] PCI: keystone: Add start_link/stop_link dw_pcie_ops | expand

Commit Message

Kishon Vijay Abraham I Jan. 14, 2019, 1:24 p.m. UTC 
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 phy_reset API in pci-keystone driver.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

---
 drivers/pci/controller/dwc/pci-keystone.c | 4 ++++
 1 file changed, 4 insertions(+)

-- 
2.17.1
diff mbox series

Patch

diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index c2873339809a..e2f4e7c01b5a 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -873,6 +873,10 @@  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;