On Thu, Aug 14, 2025 at 03:15:29PM +0100, Nuno Sá wrote: > On Thu, Aug 14, 2025 at 05:54:26AM -0700, Guenter Roeck wrote: > > On 8/14/25 03:52, Nuno Sá via B4 Relay wrote: > > > The LTC4283 device features programmable current limit with foldback and > > > independently adjustable inrush current to optimize the MOSFET safe > > > operating area (SOA). The SOA timer limits MOSFET temperature rise for > > > reliable protection against overstresses. > > > > > > An I2C interface and onboard ADC allow monitoring of board current, voltage, > > > power, energy, and fault status. > > > > > > It also features 8 pins that can be configured as GPIO devices. But since > > > the main usage for this device is monitoring, the GPIO part is optional > > > while the HWMON is being made as required. > > > > > > Also to note that the device has some similarities with the already > > > supported ltc4282 hwmon driver but it is different enough to be in it's own > > > driver (apart from being added as MFD). The register map is also fairly > > > different. > > > > > > Last time (for the ltc4282) I tried to add the gpio bits directly in the > > > hwmon driver but Guenter did not really liked it and so this time I'm doing > > > it as MFD. > > > > > Nowadays I suggest that people use auxiliary drivers in such situations. > > I see. But do you have any issue with it being MFD? I do... > I'm anyways tempted to the auxiliary device idea. The main usage for > this device is HWMON and I dunno anyone would use it only as a GPIO > controller. With the auxiliary device we would only need one bindings file > and slightly better bindings for the pins functionality. For this reason. The driver structure influencing the binding design is a problem, but I think MFD is more to blame on that. Rob
