PCI: qcom-ep: Setup PHY to work in EP mode

Call phy_set_mode_ext() to notify the PHY driver that the PHY is being
used in the EP mode.
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Jingoo Han <jingoohan1@gmail.com>
Reviewed-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Acked-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Link: https://lore.kernel.org/r/20220927092207.161501-6-dmitry.baryshkov@linaro.orgSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/pci/controller/dwc/pcie-qcom-ep.c

@@ -14,6 +14,7 @@
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
 #include <linux/mfd/syscon.h>
+#include <linux/phy/pcie.h>
 #include <linux/phy/phy.h>
 #include <linux/platform_device.h>
 #include <linux/pm_domain.h>
@@ -268,6 +269,10 @@ static int qcom_pcie_enable_resources(struct qcom_pcie_ep *pcie_ep)
 	if (ret)
 		goto err_disable_clk;
 
+	ret = phy_set_mode_ext(pcie_ep->phy, PHY_MODE_PCIE, PHY_MODE_PCIE_EP);
+	if (ret)
+		goto err_phy_exit;
+
 	ret = phy_power_on(pcie_ep->phy);
 	if (ret)
 		goto err_phy_exit;