| Message ID | 20240131-b4-qcom-usb-v1-3-6438b2a2285e@linaro.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Qualcomm DWC3 USB support | expand |
Hi Caleb, Thank you for the patch. On mer., janv. 31, 2024 at 14:57, Caleb Connolly <caleb.connolly@linaro.org> wrote: > To actually use the gadget the peripheral driver must be probed and we > must call g_dnl_clear_detach(). Otherwise acm_stdio_start() will always > fail to find a UDC on DT platforms. > > Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org> Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com> > --- > drivers/usb/gadget/f_acm.c | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/drivers/usb/gadget/f_acm.c b/drivers/usb/gadget/f_acm.c > index de42e0189e8d..ba216128ab27 100644 > --- a/drivers/usb/gadget/f_acm.c > +++ b/drivers/usb/gadget/f_acm.c > @@ -623,12 +623,21 @@ static void acm_stdio_puts(struct stdio_dev *dev, const char *str) > > static int acm_stdio_start(struct stdio_dev *dev) > { > + struct udevice *udc; > int ret; > > if (dev->priv) { /* function already exist */ > return 0; > } > > + ret = udc_device_get_by_index(0, &udc); > + if (ret) { > + pr_err("USB init failed: %d\n", ret); > + return ret; > + } > + > + g_dnl_clear_detach(); > + > ret = g_dnl_register("usb_serial_acm"); > if (ret) > return ret; > > -- > 2.43.0
diff --git a/drivers/usb/gadget/f_acm.c b/drivers/usb/gadget/f_acm.c index de42e0189e8d..ba216128ab27 100644 --- a/drivers/usb/gadget/f_acm.c +++ b/drivers/usb/gadget/f_acm.c @@ -623,12 +623,21 @@ static void acm_stdio_puts(struct stdio_dev *dev, const char *str) static int acm_stdio_start(struct stdio_dev *dev) { + struct udevice *udc; int ret; if (dev->priv) { /* function already exist */ return 0; } + ret = udc_device_get_by_index(0, &udc); + if (ret) { + pr_err("USB init failed: %d\n", ret); + return ret; + } + + g_dnl_clear_detach(); + ret = g_dnl_register("usb_serial_acm"); if (ret) return ret;
To actually use the gadget the peripheral driver must be probed and we must call g_dnl_clear_detach(). Otherwise acm_stdio_start() will always fail to find a UDC on DT platforms. Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org> --- drivers/usb/gadget/f_acm.c | 9 +++++++++ 1 file changed, 9 insertions(+)