[PATCH] Initial driver for the MAX31785 intelligent fan controller

[Timothy Pearson]

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On 09/23/2016 02:41 AM, Joel Stanley wrote:
> Hello Timothy,
> 
> On Tue, Sep 20, 2016 at 11:22 AM, Timothy Pearson
> <tpearson at raptorengineering.com> wrote:
>> Add a basic driver for the MAX31785, focusing on the fan control
>> features but ignoring the temperature and voltage monitoring
>> features of the device.
>>
>> This driver supports all fan control modes and tachometer / PWM
>> readback where applicable.
> 
>> This series adds a new hwmon driver for the MAX31875, which is
>> used for fan control on Firestone.
>>
>> This patch is a holdover until a PMBus driver is written at some
>> point.  Upstream has stated they will not accept unless a PMBus
>> driver is used for this particular device.
> 
> I'm happy to carry this in our tree for now.
> 
> Do you have a timeline for rewriting and submitting upstream?

At this time upstream needs some significant work; the PMBus core driver
as it currently exists does not support the required functions.
However, the hwmon maintainer (Gunter Roeck) has said he will work on
extending the PMBus driver and might even get something working for this
chip with that core driver, so there is definitely progress being made.
 I wouldn't expect anything upstream until at least kernel 4.9 or later
though.

- -- 
Timothy Pearson
Raptor Engineering
+1 (415) 727-8645 (direct line)
+1 (512) 690-0200 (switchboard)
https://www.raptorengineering.com
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