Re: [PATCH v2 2/3] dt-bindings: trivial-devices: Add National lm77 temperature sensor

["Łukasz Majewski" <lukma@nabladev.com>]

Hi Krzysztof,

> On 13/11/2026 13:22, Łukasz Majewski wrote:
> > Hi Krzysztof,
> >   
> >> On 13/11/2026 12:09, Łukasz Majewski wrote:  
> >>> Hi Krzysztof,
> >>>     
> >>>> On Thu, Nov 12, 2026 at 05:37:02PM +0100, Lukasz Majewski wrote:
> >>>>    
> >>>>> Add "national,lm77" as compatible for the National (now TI) LM77
> >>>>> digital I2C temperature sensor.      
> >>>>
> >>>> Are you sure this is a trivial device, not like LM75? No
> >>>> interrupts, no VS supply? Datasheet disagrees.    
> >>>
> >>> In my case the T_CRIT_A and INT are not connected on the
> >>> schematic. Moreover, the V+ is connected to board's 3V3.    
> >>
> >> But they are there and binding should be complete.
> >> What's more,
> >> existing lm75 binding does not require these so there is no issue
> >> adding to the existing binding file.  
> > 
> > Please be aware that internal operation of lm77 is a different than
> > lm75 and hence it has its own Linux driver.
> > 
> > It seems like I cannot re-use the lm75.yaml and will need to add new
> > national,lm77.yaml as lm77 has two interrupt outputs for hysteresis
> > (lm75 has only one interrupt).  
> Can be a new binding file, "national,lm77.yaml". Indeed it looks like
> it has two lines, unlike 75 variant.
> 

+1

> Best regards,
> Krzysztof

-- 
Best regards,

Lukasz Majewski

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