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patch "usb: xhci: tegra: Check padctrl interrupt presence in device tree" added to usb-linus

PATCH [email protected] 1 participant 1 message Nov 17, 2021

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Stable branch USB Tegra architecture support USB xHCI driver
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This is a note to let you know that I've just added the patch titled

usb: xhci: tegra: Check padctrl interrupt presence in device tree

to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From 51f2246158f686c881859f4b620f831f06e296e1 Mon Sep 17 00:00:00 2001
From: Dmitry Osipenko <[email protected]>
Date: Mon, 8 Nov 2021 01:44:55 +0300
Subject: usb: xhci: tegra: Check padctrl interrupt presence in device tree

Older device-trees don't specify padctrl interrupt and xhci-tegra driver now fails to probe with -EINVAL using those device-trees. Check interrupt presence and keep runtime PM disabled if it's missing to fix the trouble.

Fixes 971ee247060d ("usb: xhci: tegra: Enable ELPG for runtime/system PM")
Cc <[email protected]> # 5.14+
Reported-by Nicolas Chauvet <[email protected]>
Tested-by Nicolas Chauvet <[email protected]> # T124 TK1
Tested-by Thomas Graichen <[email protected]> # T124 Nyan Big
Tested-by Thierry Reding <[email protected]> # Tegra CI
Acked-by Thierry Reding <[email protected]>
Signed-off-by Dmitry Osipenko <[email protected]>
Link https://lore.kernel.org/r/[email protected] open here
Signed-off-by Greg Kroah-Hartman <[email protected]>
---
 drivers/usb/host/xhci-tegra.c | 41 +++++++++++++++++++++++++----------
 1 file changed, 29 insertions(+), 12 deletions(-)
drivers/usb/host/xhci-tegra.c +29 -12
index 1bf494b649bd..c8af2cd2216d 100644
@@ -1400,6 +1400,7 @@ static void tegra_xusb_deinit_usb_phy(struct tegra_xusb *tegra)
 
 static int tegra_xusb_probe(struct platform_device *pdev)
 {
+	struct of_phandle_args args;
 	struct tegra_xusb *tegra;
 	struct device_node *np;
 	struct resource *regs;

@@ -1454,10 +1455,17 @@ static int tegra_xusb_probe(struct platform_device *pdev)
 		goto put_padctl;
 	}
 
-	tegra->padctl_irq = of_irq_get(np, 0);
-	if (tegra->padctl_irq <= 0) {
-		err = (tegra->padctl_irq == 0) ? -ENODEV : tegra->padctl_irq;
-		goto put_padctl;
+	/* Older device-trees don't have padctrl interrupt */
+	err = of_irq_parse_one(np, 0, &args);
+	if (!err) {
+		tegra->padctl_irq = of_irq_get(np, 0);
+		if (tegra->padctl_irq <= 0) {
+			err = (tegra->padctl_irq == 0) ? -ENODEV : tegra->padctl_irq;
+			goto put_padctl;
+		}
+	} else {
+		dev_dbg(&pdev->dev,
+			"%pOF is missing an interrupt, disabling PM support\n", np);
 	}
 
 	tegra->host_clk = devm_clk_get(&pdev->dev, "xusb_host");

@@ -1696,11 +1704,15 @@ static int tegra_xusb_probe(struct platform_device *pdev)
 		goto remove_usb3;
 	}
 
-	err = devm_request_threaded_irq(&pdev->dev, tegra->padctl_irq, NULL, tegra_xusb_padctl_irq,
-					IRQF_ONESHOT, dev_name(&pdev->dev), tegra);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to request padctl IRQ: %d\n", err);
-		goto remove_usb3;
+	if (tegra->padctl_irq) {
+		err = devm_request_threaded_irq(&pdev->dev, tegra->padctl_irq,
+						NULL, tegra_xusb_padctl_irq,
+						IRQF_ONESHOT, dev_name(&pdev->dev),
+						tegra);
+		if (err < 0) {
+			dev_err(&pdev->dev, "failed to request padctl IRQ: %d\n", err);
+			goto remove_usb3;
+		}
 	}
 
 	err = tegra_xusb_enable_firmware_messages(tegra);

@@ -1718,13 +1730,16 @@ static int tegra_xusb_probe(struct platform_device *pdev)
 	/* Enable wake for both USB 2.0 and USB 3.0 roothubs */
 	device_init_wakeup(&tegra->hcd->self.root_hub->dev, true);
 	device_init_wakeup(&xhci->shared_hcd->self.root_hub->dev, true);
-	device_init_wakeup(tegra->dev, true);
 
 	pm_runtime_use_autosuspend(tegra->dev);
 	pm_runtime_set_autosuspend_delay(tegra->dev, 2000);
 	pm_runtime_mark_last_busy(tegra->dev);
 	pm_runtime_set_active(tegra->dev);
-	pm_runtime_enable(tegra->dev);
+
+	if (tegra->padctl_irq) {
+		device_init_wakeup(tegra->dev, true);
+		pm_runtime_enable(tegra->dev);
+	}
 
 	return 0;
 

@@ -1772,7 +1787,9 @@ static int tegra_xusb_remove(struct platform_device *pdev)
 	dma_free_coherent(&pdev->dev, tegra->fw.size, tegra->fw.virt,
 			  tegra->fw.phys);
 
-	pm_runtime_disable(&pdev->dev);
+	if (tegra->padctl_irq)
+		pm_runtime_disable(&pdev->dev);
+
 	pm_runtime_put(&pdev->dev);
 
 	tegra_xusb_powergate_partitions(tegra);
Signature · 1 line
2.34.0