From 441e48fdf0b403218805b320d93de5caeafdcb1d Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Thu, 20 Aug 2020 21:54:15 -0600 Subject: [PATCH] PCI: dwc: Set PORT_LINK_DLL_LINK_EN in common setup code The Intel driver is the only one to set PORT_LINK_DLL_LINK_EN. The default value is set and it seems pretty certain that enabling link initialization is always required. Maybe it could just be dropped from the Intel driver, but lets move setting it into the common code to be sure. Link: https://lore.kernel.org/r/20200821035420.380495-36-robh@kernel.org Signed-off-by: Rob Herring Signed-off-by: Lorenzo Pieralisi Cc: Dilip Kota Cc: Jingoo Han Cc: Gustavo Pimentel Cc: Lorenzo Pieralisi Cc: Bjorn Helgaas --- drivers/pci/controller/dwc/pcie-designware.c | 1 + drivers/pci/controller/dwc/pcie-intel-gw.c | 4 ---- 2 files changed, 1 insertion(+), 4 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c index 62a6735ada9e..5240153c15ba 100644 --- a/drivers/pci/controller/dwc/pcie-designware.c +++ b/drivers/pci/controller/dwc/pcie-designware.c @@ -551,6 +551,7 @@ void dw_pcie_setup(struct dw_pcie *pci) val = dw_pcie_readl_dbi(pci, PCIE_PORT_LINK_CONTROL); val &= ~PORT_LINK_FAST_LINK_MODE; + val |= PORT_LINK_DLL_LINK_EN; dw_pcie_writel_dbi(pci, PCIE_PORT_LINK_CONTROL, val); of_property_read_u32(np, "num-lanes", &pci->num_lanes); diff --git a/drivers/pci/controller/dwc/pcie-intel-gw.c b/drivers/pci/controller/dwc/pcie-intel-gw.c index 2c0d32ffb828..d15e49b8df2a 100644 --- a/drivers/pci/controller/dwc/pcie-intel-gw.c +++ b/drivers/pci/controller/dwc/pcie-intel-gw.c @@ -164,10 +164,6 @@ static void intel_pcie_port_logic_setup(struct intel_pcie_port *lpp) val = FIELD_PREP(PORT_AFR_N_FTS_MASK, lpp->n_fts) | FIELD_PREP(PORT_AFR_CC_N_FTS_MASK, lpp->n_fts); pcie_rc_cfg_wr_mask(lpp, PCIE_PORT_AFR, mask, val); - - /* Port Link Control Register */ - pcie_rc_cfg_wr_mask(lpp, PCIE_PORT_LINK_CONTROL, PORT_LINK_DLL_LINK_EN, - PORT_LINK_DLL_LINK_EN); } static void intel_pcie_rc_setup(struct intel_pcie_port *lpp) -- 2.20.1