On 03.07.20 19:23, Luca Olivetti wrote:
El 3/7/20 a les 18:42, John Crispin ha escrit:
On 03.07.20 18:10, Luca Olivetti wrote:
Hello,
around 2 years ago, this patch
https://git.openwrt.org/?p=openwrt/openwrt.git;a=commitdiff;h=6eaf8b3d89571992a0aa7142cfab3f1dcef3c802#patch7
broke the usb on my arv7518pw: when it tries to power up the usb it
returns error -537 (EPROBE_DEFER, see
https://bugs.openwrt.org/index.php?do=details&task_id=1634).
[ 5.431505] dwc2 1e101000.usb: 1e101000.usb supply vusb_d not found,
using dummy regulator
[ 5.438418] dwc2 1e101000.usb: 1e101000.usb supply vusb_a not found,
using dummy regulator
[ 5.446581] dwc2 1e101000.usb: dwc2_core_reset() HANG! Soft Reset
GRSTCTL=80000001
[ 5.593255] dwc2 1e101000.usb: DWC OTG Controller
[ 5.596565] dwc2 1e101000.usb: new USB bus registered, assigned bus
number 1
[ 5.603417] dwc2 1e101000.usb: irq 62, io mem 0x1e101000
[ 5.608632] dwc2 1e101000.usb: startup error -517
[ 5.613124] dwc2 1e101000.usb: USB bus 1 deregistered
[ 5.618080] dwc2 1e101000.usb: dwc2_hcd_init() FAILED, returning -517
If I revert the above patch, the usb initializes correctly, but
there's no 5V on the port so it doesn't work.
I hacked a fake led on gpio 14 so I can turn on the 5V from user
space, and the usb works (I tried with a memory stick and an rt73
wifi stick, an rtl8812au doesn't work but I think because its driver
is ... meh).
What's the proper way to turn on the 5V on gpio 14 (i.e. fix the
-EPROBE_DEFER error)?
I suppose that the issue also affects other danube based devices,
but I can only test the one I have.
This is against 19.07.3
Why not use the gpio regulator ?
Because I don't know how :-(
https://www.kernel.org/doc/Documentation/devicetree/bindings/regulator/fixed-regulator.yaml
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