From: Nagarjuna Kristam nkristam@nvidia.com
commit 6351653febbb784d86fdf83afe41f7523a61b392 upstream.
XUSB phy needs to be enabled before un-powergating the power partitions. However in the current sequence, it happens opposite. Correct the phy enable and powergating partition sequence to avoid any boot hangs.
Signed-off-by: Nagarjuna Kristam nkristam@nvidia.com Cc: stable stable@vger.kernel.org Signed-off-by: Jui Chang Kuo jckuo@nvidia.com Tested-by: Jon Hunter jonathanh@nvidia.com Acked-by: Thierry Reding treding@nvidia.com Link: https://lore.kernel.org/r/1572859470-7823-1-git-send-email-nkristam@nvidia.c... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/usb/host/xhci-tegra.c | 25 +++++++++++++------------ 1 file changed, 13 insertions(+), 12 deletions(-)
--- a/drivers/usb/host/xhci-tegra.c +++ b/drivers/usb/host/xhci-tegra.c @@ -755,7 +755,6 @@ static int tegra_xusb_runtime_suspend(st { struct tegra_xusb *tegra = dev_get_drvdata(dev);
- tegra_xusb_phy_disable(tegra); regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies); tegra_xusb_clk_disable(tegra);
@@ -779,16 +778,8 @@ static int tegra_xusb_runtime_resume(str goto disable_clk; }
- err = tegra_xusb_phy_enable(tegra); - if (err < 0) { - dev_err(dev, "failed to enable PHYs: %d\n", err); - goto disable_regulator; - } - return 0;
-disable_regulator: - regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies); disable_clk: tegra_xusb_clk_disable(tegra); return err; @@ -1181,6 +1172,12 @@ static int tegra_xusb_probe(struct platf */ platform_set_drvdata(pdev, tegra);
+ err = tegra_xusb_phy_enable(tegra); + if (err < 0) { + dev_err(&pdev->dev, "failed to enable PHYs: %d\n", err); + goto put_hcd; + } + pm_runtime_enable(&pdev->dev); if (pm_runtime_enabled(&pdev->dev)) err = pm_runtime_get_sync(&pdev->dev); @@ -1189,7 +1186,7 @@ static int tegra_xusb_probe(struct platf
if (err < 0) { dev_err(&pdev->dev, "failed to enable device: %d\n", err); - goto disable_rpm; + goto disable_phy; }
tegra_xusb_config(tegra, regs); @@ -1275,9 +1272,11 @@ remove_usb2: put_rpm: if (!pm_runtime_status_suspended(&pdev->dev)) tegra_xusb_runtime_suspend(&pdev->dev); -disable_rpm: - pm_runtime_disable(&pdev->dev); +put_hcd: usb_put_hcd(tegra->hcd); +disable_phy: + tegra_xusb_phy_disable(tegra); + pm_runtime_disable(&pdev->dev); put_powerdomains: if (!of_property_read_bool(pdev->dev.of_node, "power-domains")) { tegra_powergate_power_off(TEGRA_POWERGATE_XUSBC); @@ -1314,6 +1313,8 @@ static int tegra_xusb_remove(struct plat tegra_xusb_powerdomain_remove(&pdev->dev, tegra); }
+ tegra_xusb_phy_disable(tegra); + tegra_xusb_padctl_put(tegra->padctl);
return 0;