18 Apr
2023
18 Apr
'23
10:25 a.m.
On 4/18/23 09:21, Patrice CHOTARD wrote:
Hi Marek
Hello Patrice,
On 4/17/23 19:00, Marek Vasut wrote:
On 4/17/23 18:56, Patrice Chotard wrote:
In case USB hub regulator is shared, unexpected behavior occurs. On stm32mp135f-dk, stm32mp157c-ev1 and stm32mp157x-dkx, regulator v3v3 is shared between several IP/devices (USB, panel, ethernet phy, camera, ...). Running command "usb stop", v3v3 regulator is switched off and the splashscreen content disappear.
v3v3 shouldn't be disabled on usb_onboard_hub_remove() callback.
Isn't the regulator enable/disable refcounted ?
There is no refcount on regulator that's why we let regulator enable.
Can we add that, instead of hacking around the missing refcount in every driver ?