[PATCH v2] usb: i.MX: warn if vbus regulator isn't available

[Uwe Kleine-König]

Instead of just ignoring errors related to getting the vbus regulator
yield at least a warning message. This would have saved me some
debugging time when trying to understand why USB doesn't work without
the right regulator driver enabled.

Note that machines that don't define a regulator in their device tree
don't issue this warning as regulator_get() returns the dummy regulator
in this case.

The alternative to error out wasn't accepted because this probably
creates regressions for regulators that are default-on but without a
driver in barebox.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
---
Hello,

(implicit) v1 was sent some time ago with Message-ID:
<1485d35a-d55b-2440-4852-1737e78f8aa1 at pengutronix.de>. Ahmad suggested
to use %pe instead of strerror(-ret). This is also the only change
compared to the first submission.

Best regards
Uwe

 drivers/usb/imx/chipidea-imx.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/imx/chipidea-imx.c b/drivers/usb/imx/chipidea-imx.c
index 7b87f302a921..aa27941c8c66 100644
--- a/drivers/usb/imx/chipidea-imx.c
+++ b/drivers/usb/imx/chipidea-imx.c
@@ -256,8 +256,11 @@ static int imx_chipidea_probe(struct device_d *dev)
 	}
 
 	ci->vbus = regulator_get(dev, "vbus");
-	if (IS_ERR(ci->vbus))
+	if (IS_ERR(ci->vbus)) {
+		dev_warn(dev, "Cannot get vbus regulator: %pe (ignoring)\n",
+			 ci->vbus);
 		ci->vbus = NULL;
+	}
 
 	/*
 	 * Some devices have more than one clock, in this case they are enabled
-- 
2.30.0