Hi, apologies for the late reply. On Thu, Jul 25, 2013 at 02:26:51PM +0100, Oleksandr Kozaruk wrote: > Hello, > > v8 - removed unused test channels completely, removed die > temperature channels, as it is not known how to convert ADC code > to temperature. There if formula for twl6030, but no formula > for twl6032. > v7 - addressed clean up comments, removed test channels > v6 - addressed comments about trim bits, checkpatch clean up > v5 - gpadc DT node renamed from "gpadc" to generic "adc", added > temperature channels; raw code is corracted with calibration > data. > v4 - addressed comments: fixed style violation, bug in freeing memory, > added comments explaining calibration method, removed test network > channels from exposing to userspace, error handling for > wait_for_complition > v3 - fixed compiler warning > v2 - the driver put in drivers/iio, and > converted using iio facilities as suggested by Graeme. > > TWL603[02] GPADC is used to measure battery voltage, > battery temperature, battery presence ID, and could > be used to measure twl603[02] die temperature. > This is used on TI blaze, blaze tablet platforms. > > The TWL6030/TWL6032 is a PMIC that has a GPADC with 17/19 > channels respectively. Some channels have current > source and are used for measuring voltage drop > on resistive load for detecting battery ID resistance, > or measuring voltage drop on NTC resistors for external > temperature measurements, other channels measure voltage, > (i.e. battery voltage), and have inbuilt voltage dividers, > thus, capable to scale voltage. Some channels are dedicated > for measuring die temperature. > > Some channels could be calibrated in 2 points, having > offsets from ideal values in trim registers. > > The difference between GPADC in TWL6030 and TWL6032: > - 10 bit vs 12 bit ADC; > - 17 vs 19 channels; > - channels have different purpose(i. e. battery voltage > channel 8 vs channel 18); > - trim values are interpreted differently. > > The driver is derived from git://git.omapzoom.org/kernel/omap.git > The original driver's authors and contributors are Balaji T K, > Graeme Gregory, Ambresh K, Girish S Ghongdemath. > > The changes to the original driver: > - device tree adaptation; I couldn't see a binding document in this series or in mainline. Have I looked in the wrong places? Mark. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
