Messages in this thread | | | Subject | Re: [PATCH v2 0/3] input: rmi4: Regulator supply support | From | Andrew Duggan <> | Date | Mon, 16 May 2016 16:55:51 -0700 |
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On 05/13/2016 03:29 PM, Bjorn Andersson wrote: > On Thu 12 May 17:52 PDT 2016, Andrew Duggan wrote: > >> On 05/11/2016 08:05 PM, Bjorn Andersson wrote: >>> On Wed 11 May 16:30 PDT 2016, Andrew Duggan wrote: >>> >>>> Hi Bjorn, >>>> >>>> On 05/10/2016 08:49 AM, Bjorn Andersson wrote: >>> [..] >>>>> So either we duplicate the regulator support in spi/i2c or we make them >>>>> optional in the core driver. Sounds like you prefer the prior, i.e. v1 >>>>> of my patch. >>>> Yes, after all this I think it makes sense to put regulator support in the >>>> spi/i2c transports like in your v1 patch. I essentially duplicated the irq >>>> handling code in both transports so I would be ok with duplicating regulator >>>> support too. It doesn't seem like that much code. But, if this is too much >>>> duplication we could create some sort of common file and put the common irq >>>> and regulator support functions which could be called in the transports. >>>> Similar to how rmi_2d_sensor.c defines some common functions shared between >>>> rmi_f11 and rmi_f12. >>>> >>> Sounds reasonable, I'm okay with this. Did you have any comments on the >>> implementation I had in v1? >> I tested on a device which has an always on regulators so I didn't add >> anything to device tree for the device. But, it returned 0 when it didn't >> find anything which seems to be the correct behavior. Is there an easy way >> to avoid sleeping for 10ms when there are no regulators? Maybe check if both >> the supplies .consumer pointer is null? >> > I did look at this as well, but unfortunately the regulators does not > come back as NULL, but rather as dummy regulators. > > The delay matches Tpowerup (iirc) from the data sheet, which I assume is > firmware/hardware dependant. Should we provide a knob for that and > default the sleep to 0ms?
Making the default 0 and then setting an appropriate time out for devices which need it sounds like a good idea to me.
Thanks, Andrew
> Regards, > Bjorn
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