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path: root/drivers/usb/dwc3/core.c
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Diffstat (limited to 'drivers/usb/dwc3/core.c')
-rw-r--r--drivers/usb/dwc3/core.c59
1 files changed, 37 insertions, 22 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 9f0e209b8f6c..2bbab3d86fff 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -774,17 +774,13 @@ static int dwc3_probe(struct platform_device *pdev)
* since it will be requested by the xhci-plat driver.
*/
regs = devm_ioremap_resource(dev, res);
- if (IS_ERR(regs))
- return PTR_ERR(regs);
+ if (IS_ERR(regs)) {
+ ret = PTR_ERR(regs);
+ goto err0;
+ }
dwc->regs = regs;
dwc->regs_size = resource_size(res);
- /*
- * restore res->start back to its original value so that,
- * in case the probe is deferred, we don't end up getting error in
- * request the memory region the next time probe is called.
- */
- res->start -= DWC3_GLOBALS_REGS_START;
/* default to highest possible threshold */
lpm_nyet_threshold = 0xff;
@@ -808,6 +804,8 @@ static int dwc3_probe(struct platform_device *pdev)
"snps,is-utmi-l1-suspend");
of_property_read_u8(node, "snps,hird-threshold",
&hird_threshold);
+ dwc->usb3_lpm_capable = of_property_read_bool(node,
+ "snps,usb3_lpm_capable");
dwc->needs_fifo_resize = of_property_read_bool(node,
"tx-fifo-resize");
@@ -848,6 +846,7 @@ static int dwc3_probe(struct platform_device *pdev)
hird_threshold = pdata->hird_threshold;
dwc->needs_fifo_resize = pdata->tx_fifo_resize;
+ dwc->usb3_lpm_capable = pdata->usb3_lpm_capable;
dwc->dr_mode = pdata->dr_mode;
dwc->disable_scramble_quirk = pdata->disable_scramble_quirk;
@@ -878,7 +877,7 @@ static int dwc3_probe(struct platform_device *pdev)
ret = dwc3_core_get_phy(dwc);
if (ret)
- return ret;
+ goto err0;
spin_lock_init(&dwc->lock);
platform_set_drvdata(pdev, dwc);
@@ -899,7 +898,7 @@ static int dwc3_probe(struct platform_device *pdev)
if (ret) {
dev_err(dwc->dev, "failed to allocate event buffers\n");
ret = -ENOMEM;
- goto err0;
+ goto err1;
}
if (IS_ENABLED(CONFIG_USB_DWC3_HOST))
@@ -913,65 +912,81 @@ static int dwc3_probe(struct platform_device *pdev)
ret = dwc3_core_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize core\n");
- goto err0;
+ goto err1;
}
usb_phy_set_suspend(dwc->usb2_phy, 0);
usb_phy_set_suspend(dwc->usb3_phy, 0);
ret = phy_power_on(dwc->usb2_generic_phy);
if (ret < 0)
- goto err1;
+ goto err2;
ret = phy_power_on(dwc->usb3_generic_phy);
if (ret < 0)
- goto err_usb2phy_power;
+ goto err3;
ret = dwc3_event_buffers_setup(dwc);
if (ret) {
dev_err(dwc->dev, "failed to setup event buffers\n");
- goto err_usb3phy_power;
+ goto err4;
}
ret = dwc3_core_init_mode(dwc);
if (ret)
- goto err2;
+ goto err5;
ret = dwc3_debugfs_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize debugfs\n");
- goto err3;
+ goto err6;
}
pm_runtime_allow(dev);
return 0;
-err3:
+err6:
dwc3_core_exit_mode(dwc);
-err2:
+err5:
dwc3_event_buffers_cleanup(dwc);
-err_usb3phy_power:
+err4:
phy_power_off(dwc->usb3_generic_phy);
-err_usb2phy_power:
+err3:
phy_power_off(dwc->usb2_generic_phy);
-err1:
+err2:
usb_phy_set_suspend(dwc->usb2_phy, 1);
usb_phy_set_suspend(dwc->usb3_phy, 1);
dwc3_core_exit(dwc);
-err0:
+err1:
dwc3_free_event_buffers(dwc);
+err0:
+ /*
+ * restore res->start back to its original value so that, in case the
+ * probe is deferred, we don't end up getting error in request the
+ * memory region the next time probe is called.
+ */
+ res->start -= DWC3_GLOBALS_REGS_START;
+
return ret;
}
static int dwc3_remove(struct platform_device *pdev)
{
struct dwc3 *dwc = platform_get_drvdata(pdev);
+ struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ /*
+ * restore res->start back to its original value so that, in case the
+ * probe is deferred, we don't end up getting error in request the
+ * memory region the next time probe is called.
+ */
+ res->start -= DWC3_GLOBALS_REGS_START;
dwc3_debugfs_exit(dwc);
dwc3_core_exit_mode(dwc);