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Date: Sat, 03 Jan 2009 21:11:10 +0000 From: Jonathan Cameron <jic23@....ac.uk> To: LKML <linux-kernel@...r.kernel.org> CC: lrg@...mlogic.co.uk, broonie@...nsource.wolfsonmicro.com Subject: [RFC] Regulator: Possibility of passing notifications of non alarm events. Dear All, I am in the process of writing an hwmon driver for the Sensiron SHT15 humidity sensor. In common (I assume) with lots of other devices, the formula for converting the outputs of this chip to real units involves the supply voltage. Unfortunately the chip doesn't itself have any means of measuring this. Obviously this can be supplied via a board config if it is constant. As I have it connected to a DA9030 pmic I can register it as a consumer and hence query what the pmic thinks it is supplying. Unfortunately this regulator is shared with a number of other chips and so there is no guarantee that this voltage won't be changed (within the bounds supported by the SHT15). I'd like to avoid querying the regulator voltage every time I do a conversion. As the regulator framework already allows you to register to receive events such as under voltage detections, it seems to me that it would also make sense to allow registrations of handlers for events that occur during normal operation such as voltage changes. What do people think to adding this functionality? Thanks -- Jonathan Cameron -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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