On 09/08/2024 07:19, Jan Kiszka wrote:
On 08.08.24 16:27, Caleb Connolly wrote:
Hi Jan,
On 08/08/2024 10:51, Jan Kiszka wrote:
From: Jan Kiszka <jan.kis...@siemens.com>
When DM_REGULATOR is disabled, all calls will return -ENOSYS. Account
for that so that targets like the IOT2050 will work again.
Fixes: de451d5d5b6f ("usb: dwc3-generic: support external vbus
regulator")
Signed-off-by: Jan Kiszka <jan.kis...@siemens.com>
---
drivers/usb/dwc3/dwc3-generic.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/dwc3/dwc3-generic.c
b/drivers/usb/dwc3/dwc3-generic.c
index a9ba315463c..2ab41cbae45 100644
--- a/drivers/usb/dwc3/dwc3-generic.c
+++ b/drivers/usb/dwc3/dwc3-generic.c
@@ -246,12 +246,12 @@ static int dwc3_generic_host_probe(struct
udevice *dev)
return rc;
rc = device_get_supply_regulator(dev, "vbus-supply",
&priv->vbus_supply);
- if (rc)
+ if (rc && rc != -ENOSYS)
debug("%s: No vbus regulator found: %d\n", dev->name, rc);
- /* Only returns an error if regulator is valid and failed to
enable due to a driver issue */
+ /* Does not return an error if regulator is invalid - but does so
when DM_REGULATOR is disabled */
rc = regulator_set_enable_if_allowed(priv->vbus_supply, true);
- if (rc)
+ if (rc && rc != -ENOSYS)
regulator_set_enable_if_allowed() will return 0 if the call to
regulator_set_enable() returns -ENOSYS
Maybe it would make sense to have the stub implementation of
regulator_set_enable_if_allowed() return 0?
Possible. Would that be the only case where a stub should not return
ENOSYS? All do so far.
Somewhat confusing to check for -ENOSYS here imo, since it isn't really
obvious when that would be the case.
But that would still leave is a with a misleading message, even if it is
just a debug output. The absence of a regulator is not per se a bug to
my understanding.
Ah good point.
Alternatively, maybe it would be easier to gate this code block with if
(CONFIG_IS_ENABLED(DM_REGULATOR)?
But yeah maybe fine as is.
Reviewed-by: Caleb Connolly <caleb.conno...@linaro.org>
Jan
return rc;
hccr = (struct xhci_hccr *)priv->gen_priv.base;
--
// Caleb (they/them)
