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DWC3 also controls USB PHYs, but it is not able to call the calibrate() method at the right moment. Fixes: 6000b8d900cd ("usb: dwc3: disable USB core PHY management") Reported-by: Stefan Agner Signed-off-by: Marek Szyprowski --- This fixes the issue reported here: https://lore.kernel.org/all/808bdba846bb60456adf10a3016911ee@agner.ch/ Alternative for this change is a complete revert of the 6000b8d900cd ("usb: dwc3: disable USB core PHY management") commit. Best regards Marek Szyprowski, PhD Samsung R&D Institute Poland --- drivers/usb/dwc3/core.c | 2 ++ drivers/usb/dwc3/core.h | 1 + drivers/usb/dwc3/dwc3-exynos.c | 65 +++++++++++++++++++++++----------- drivers/usb/dwc3/host.c | 3 +- 4 files changed, 49 insertions(+), 22 deletions(-) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index c0e7c76dc5c8..87d4472fc031 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -1548,6 +1548,8 @@ static void dwc3_get_properties(struct dwc3 *dwc) "snps,parkmode-disable-ss-quirk"); dwc->gfladj_refclk_lpm_sel = device_property_read_bool(dev, "snps,gfladj-refclk-lpm-sel-quirk"); + dwc->xhci_force_phy_control_quirk = device_property_read_bool(dev, + "snps,xhci_force_phy_control"); dwc->tx_de_emphasis_quirk = device_property_read_bool(dev, "snps,tx_de_emphasis_quirk"); diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 8f9959ba9fd4..4d53edaf5999 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -1318,6 +1318,7 @@ struct dwc3 { unsigned resume_hs_terminations:1; unsigned parkmode_disable_ss_quirk:1; unsigned gfladj_refclk_lpm_sel:1; + unsigned xhci_force_phy_control_quirk:1; unsigned tx_de_emphasis_quirk:1; unsigned tx_de_emphasis:2; diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c index 0ecf20eeceee..fbeefc9eb9c5 100644 --- a/drivers/usb/dwc3/dwc3-exynos.c +++ b/drivers/usb/dwc3/dwc3-exynos.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include @@ -35,22 +36,20 @@ struct dwc3_exynos { struct regulator *vdd33; struct regulator *vdd10; + struct platform_device *dwc3; }; -static int dwc3_exynos_remove_child(struct device *dev, void *unused) -{ - struct platform_device *pdev = to_platform_device(dev); - - platform_device_unregister(pdev); - - return 0; -} +static const struct property_entry dwc3_exynos_properties[] = { + PROPERTY_ENTRY_BOOL("snps,xhci_force_phy_control"), + {} +}; static int dwc3_exynos_probe(struct platform_device *pdev) { struct dwc3_exynos *exynos; struct device *dev = &pdev->dev; - struct device_node *node = dev->of_node; + struct device_node *node = dev->of_node, *child; + struct platform_device *dwc3; const struct dwc3_exynos_driverdata *driver_data; int i, ret; @@ -109,21 +108,44 @@ static int dwc3_exynos_probe(struct platform_device *pdev) goto vdd10_err; } - if (node) { - ret = of_platform_populate(node, NULL, NULL, dev); - if (ret) { - dev_err(dev, "failed to add dwc3 core\n"); - goto populate_err; - } - } else { - dev_err(dev, "no device node, failed to add dwc3 core\n"); - ret = -ENODEV; - goto populate_err; + child = of_get_next_child(node, NULL); + if (!child) { + dev_err(dev, "Failed to find DWC3 core device node\n"); + goto dwc3_child_err; + } + + dwc3 = of_device_alloc(child, NULL, dev); + if (!dwc3) { + dev_err(dev, "Failed to allocate DWC3 core device\n"); + goto dwc3_alloc_err; + } + + dwc3->dev.coherent_dma_mask = DMA_BIT_MASK(32); + dwc3->dev.dma_mask = &dwc3->dev.coherent_dma_mask; + dwc3->dev.bus = &platform_bus_type; + + ret = device_create_managed_software_node(&dwc3->dev, + dwc3_exynos_properties, NULL); + if (ret < 0) { + dev_err(dev, "Failed to add properties to DWC3 device\n"); + goto dwc3_props_err; + } + + ret = of_device_add(dwc3); + if (ret) { + dev_err(&pdev->dev, "Failed to register DWC3 core device\n"); + goto dwc3_props_err; } + exynos->dwc3 = dwc3; + of_node_put(child); return 0; -populate_err: +dwc3_props_err: + platform_device_put(dwc3); +dwc3_alloc_err: + of_node_put(child); +dwc3_child_err: regulator_disable(exynos->vdd10); vdd10_err: regulator_disable(exynos->vdd33); @@ -142,7 +164,8 @@ static int dwc3_exynos_remove(struct platform_device *pdev) struct dwc3_exynos *exynos = platform_get_drvdata(pdev); int i; - device_for_each_child(&pdev->dev, NULL, dwc3_exynos_remove_child); + device_remove_software_node(&exynos->dwc3->dev); + of_device_unregister(exynos->dwc3); for (i = exynos->num_clks - 1; i >= 0; i--) clk_disable_unprepare(exynos->clks[i]); diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c index a7154fe8206d..84f25f392dbd 100644 --- a/drivers/usb/dwc3/host.c +++ b/drivers/usb/dwc3/host.c @@ -97,7 +97,8 @@ int dwc3_host_init(struct dwc3 *dwc) goto err; } - ret = platform_device_add_data(xhci, &dwc3_xhci_plat_priv, + if (!dwc->xhci_force_phy_control_quirk) + ret = platform_device_add_data(xhci, &dwc3_xhci_plat_priv, sizeof(dwc3_xhci_plat_priv)); if (ret) goto err;