On Sat, Aug 31, 2024 at 04:20:34PM +0200, Hans de Goede wrote: > According to Documentation/ABI/testing/sysfs-class-power the "usb_type" > property is Read-Only. > > For power-supplies which consume USB power such as battery charger chips, > this is correct. > > But the UCS1002 USB Port Power Controller driver which is a driver > for a chip which is a power-source for USB-A charging ports "usb_type" > is actually writable to configure the type of USB charger emulated > by the USB-A port. Ick, crazy hardware :( > > Adjust the docs and the power_supply_sysfs.c code to adjust for this > new writeable use of "usb_type": > > 1. Update Documentation/ABI/testing/sysfs-class-power to document that > "usb_type" may be writable > > 2. Change the power_supply_attr type in power_supply_sysfs.c from > POWER_SUPPLY_ATTR() into POWER_SUPPLY_ENUM_ATTR() so that the various > usb_type string values from POWER_SUPPLY_TYPE_TEXT[] such as e.g. > "SDP" and "USB_PD" can be written to the "usb_type" attribute instead > of only accepting integer values. > > Cc: Enric Balletbo Serra <enric.balletbo@xxxxxxxxxxxxx> > Cc: Andrey Smirnov <andrew.smirnov@xxxxxxxxx> > Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
