From: Fabio Estevam <fabio.estevam@xxxxxxx>
Since commit 03e6275ae381087bd8 ("usb: chipidea: Fix ULPI on imx51") the
kernel hangs on a imx51-babbage board, when using the ULPI interface with
the CONFIG_USB_CHIPIDEA_ULPI option unselected.
Instead of hanging the kernel, let's warn the user that
CONFIG_USB_CHIPIDEA_ULPI needs to be selected, propagate an error
and continue with booting the kernel.
The user can then react to the warning and select
CONFIG_USB_CHIPIDEA_ULPI as needed.
Fixes: 03e6275ae381087bd8 ("usb: chipidea: Fix ULPI on imx51")
Suggested-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
Signed-off-by: Fabio Estevam <fabio.estevam@xxxxxxx>
---
drivers/usb/chipidea/core.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 85fc6db..5ab9db1 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -608,6 +608,16 @@ static int ci_get_platdata(struct device *dev,
if (!platdata->phy_mode)
platdata->phy_mode = of_usb_get_phy_mode(dev->of_node);
+ if (platdata->phy_mode == USBPHY_INTERFACE_MODE_ULPI) {
+ /*
+ * CONFIG_USB_CHIPIDEA_ULPI needs to be selected
+ * for proper usage of the ULPI mode
+ */
+ WARN_ONCE(!IS_ENABLED(CONFIG_USB_CHIPIDEA_ULPI),
+ "Select CONFIG_USB_CHIPIDEA_ULPI in order to use ULPI mode\n");
+ return -EINVAL;
+ }
+
if (!platdata->dr_mode)
platdata->dr_mode = usb_get_dr_mode(dev);
--
2.7.4
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
