From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kishon Vijay Abraham I Subject: [PATCH 15/24] PCI: keystone: Invoke phy_reset API before enabling PHY Date: Mon, 14 Jan 2019 18:54:15 +0530 Message-ID: <20190114132424.6445-16-kishon@ti.com> References: <20190114132424.6445-1-kishon@ti.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <20190114132424.6445-1-kishon@ti.com> Sender: linux-kernel-owner@vger.kernel.org To: Gustavo Pimentel , Rob Herring , Lorenzo Pieralisi Cc: Kishon Vijay Abraham I , Jingoo Han , Bjorn Helgaas , Mark Rutland , Arnd Bergmann , Greg Kroah-Hartman , Murali Karicheri , Jesper Nilsson , linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-kernel@axis.com List-Id: devicetree@vger.kernel.org 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 --- drivers/pci/controller/dwc/pci-keystone.c | 4 ++++ 1 file changed, 4 insertions(+) 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; -- 2.17.1