[PATCH v4] hwmon: add a driver for the temp/voltage sensor on PolarFire SoC

[Guenter Roeck]

On Mon, Jun 29, 2026 at 10:30:59AM +0100, Conor Dooley wrote:
> From: Lars Randers <lranders at mail.dk>
> 
> Add a driver for the temperature and voltage sensors on PolarFire SoC.
> The temperature reports how hot the die is, and the voltages are the
> SoC's 1.05, 1.8 and 2.5 volt rails respectively.
> 
> The hardware supports alarms in theory, but there is an erratum that
> prevents clearing them once triggered, so no support is added for them.
> 
> The hardware measures voltage with 16 bits, of which 1 is a sign bit and
> the remainder holds the voltage as a fixed point integer value. It's
> improbable that the hardware will work if the voltages are negative, so
> the driver ignores the sign bits.
> 
> There's no dt support etc here because this is the child of a simple-mfd
> syscon.
> 
> Signed-off-by: Lars Randers <lranders at mail.dk>
> Co-developed-by: Conor Dooley <conor.dooley at microchip.com>
> Signed-off-by: Conor Dooley <conor.dooley at microchip.com>

Applied.

Thanks,
Guenter