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This allows controller power-off to be skipped when some devices(e.g. M.2 cards key E without auxiliary power) required to support PCIe L2 link state and wake-up mechanisms. Signed-off-by: Sherry Sun --- drivers/pci/controller/dwc/pci-imx6.c | 21 ++++++++++++++------- 1 file changed, 14 insertions(+), 7 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 1b535bb6fd31..0685573fee71 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -1382,10 +1382,12 @@ static int imx_pcie_host_init(struct dw_pcie_rp *pp) } } - ret = pci_pwrctrl_power_on_devices(dev); - if (ret) { - dev_err(dev, "failed to power on pwrctrl devices\n"); - goto err_reg_disable; + if (!pp->skip_pwrctrl_off) { + ret = pci_pwrctrl_power_on_devices(dev); + if (ret) { + dev_err(dev, "failed to power on pwrctrl devices\n"); + goto err_reg_disable; + } } ret = imx_pcie_clk_enable(imx_pcie); @@ -1454,7 +1456,8 @@ static int imx_pcie_host_init(struct dw_pcie_rp *pp) err_clk_disable: imx_pcie_clk_disable(imx_pcie); err_pwrctrl_power_off: - pci_pwrctrl_power_off_devices(dev); + if (!pp->skip_pwrctrl_off) + pci_pwrctrl_power_off_devices(dev); err_reg_disable: if (imx_pcie->vpcie) regulator_disable(imx_pcie->vpcie); @@ -1473,7 +1476,8 @@ static void imx_pcie_host_exit(struct dw_pcie_rp *pp) } imx_pcie_clk_disable(imx_pcie); - pci_pwrctrl_power_off_devices(pci->dev); + if (!pci->pp.skip_pwrctrl_off) + pci_pwrctrl_power_off_devices(pci->dev); if (imx_pcie->vpcie) regulator_disable(imx_pcie->vpcie); } @@ -1990,11 +1994,14 @@ static int imx_pcie_probe(struct platform_device *pdev) static void imx_pcie_shutdown(struct platform_device *pdev) { struct imx_pcie *imx_pcie = platform_get_drvdata(pdev); + struct dw_pcie *pci = imx_pcie->pci; + struct dw_pcie_rp *pp = &pci->pp; /* bring down link, so bootloader gets clean state in case of reboot */ imx_pcie_assert_core_reset(imx_pcie); imx_pcie_assert_perst(imx_pcie, true); - pci_pwrctrl_power_off_devices(&pdev->dev); + if (!pp->skip_pwrctrl_off) + pci_pwrctrl_power_off_devices(&pdev->dev); pci_pwrctrl_destroy_devices(&pdev->dev); } -- 2.50.1