Check during probe() if a hub supported by the onboard_usb_hub
driver is connected to the controller. If such a hub is found
create the corresponding platform device. This requires the
device tree to have a node for the hub with its vendor and
product id (which is not common for USB devices). Further the
platform device is only created when CONFIG_USB_ONBOARD_HUB=y/m.
Signed-off-by: Matthias Kaehlcke <m...@chromium.org>
---
Changes in v7:
- none
Changes in v6:
- none
Changes in v5:
- patch added to the series
drivers/usb/host/xhci-plat.c | 16 ++++++++++++++++
include/linux/usb/hcd.h | 2 ++
2 files changed, 18 insertions(+)
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index c1edcc9b13ce..9c0fb7e8df1f 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -15,6 +15,7 @@
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
+#include <linux/usb/onboard_hub.h>
#include <linux/usb/phy.h>
#include <linux/slab.h>
#include <linux/acpi.h>
@@ -195,6 +196,7 @@ static int xhci_plat_probe(struct platform_device *pdev)
int ret;
int irq;
struct xhci_plat_priv *priv = NULL;
+ struct device_node *np;
if (usb_disabled())
@@ -374,6 +376,17 @@ static int xhci_plat_probe(struct platform_device *pdev)
*/
pm_runtime_forbid(&pdev->dev);
+ np = usb_of_get_device_node(hcd->self.root_hub, hcd->self.busnum);
+ if (np && of_is_onboard_usb_hub(np)) {
+ struct platform_device *pdev;
+
+ pdev = of_platform_device_create(np, NULL, NULL);
+ if (pdev)
+ hcd->onboard_hub_dev = &pdev->dev;
+ else
+ xhci_warn(xhci, "failed to create onboard hub platform
device\n");
+ }
+
return 0;
@@ -420,6 +433,9 @@ static int xhci_plat_remove(struct platform_device *dev)
usb_remove_hcd(hcd);
usb_put_hcd(shared_hcd);
+ if (hcd->onboard_hub_dev)
+ of_platform_device_destroy(hcd->onboard_hub_dev, NULL);
+
clk_disable_unprepare(clk);
clk_disable_unprepare(reg_clk);
usb_put_hcd(hcd);
diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
index 96281cd50ff6..d02a508e19b0 100644
--- a/include/linux/usb/hcd.h
+++ b/include/linux/usb/hcd.h
@@ -225,6 +225,8 @@ struct usb_hcd {
* (ohci 32, uhci 1024, ehci 256/512/1024).
*/
+ struct device *onboard_hub_dev;
+
/* The HC driver's private data is stored at the end of
* this structure.
*/
--
2.31.0.208.g409f899ff0-goog
