Dear Juergen Beisert, > The following series replaces the current busy loop touchscreen > implementation for i.MX28/i.MX23 SoCs by a fully interrupt driven > implementation. > > Since i.MX23 and i.MX28 silicon differs, the existing implementation can > be used for the i.MX28 SoC only. > > The first patch adds proper clock handling. Various platforms seems to > disable the internal 2 kHz clock which is used by the LRADC delay units. > > The next two patches of this series move the i.MX28 specific definitions > out of the way. The forth patch simplifies the register access to make it > easier to add the i.MX23 support. Then the i.MX23 specific definitions are > added, also the code to distinguish both SoCs at run-time. > Up to here the existing touchscreen driver will now run on an i.MX23 Soc as > well. > > When these i.MX SoCs are running from battery it seems not to be a good > idea to run a busy loop to detect touches and their location. The 6th > patch adds a fully interrupt driven implementation which makes use of the > built-in delay and multiple sample features of the touchscreen controller. > This will reduce the interrupt load to a minimum. > > The remaining patches in this series just removes the existing busy loop > implementation, add a proposal for devicetree binding and a reminder what > has still to be done with the LRADC driver. > > Changes since v5: > > - add missing clock handling which prevents the delay units from work (this > should make it work on the MX28EVK and M28EVK as well) > > Changes since v4: > > - honor Jonathan's comments about function names > - honor Dmitry's comments about workqueue canceling and interrupts > - adding devicetree bindings proposal > > Changes since v3: > > - split adding register access functions and i.MX23 support into two > patches > > Changes since v2: > > - useless debug output removed > > Changes since v1: > > - adding register access functions to make the existing code more readable > - adding some functions to distinguish the SoCs at run-time to avoid > if-else contructs whenever differences in the register layout between > i.MX23 and i.MX28 must be handled > > Comments are welcome. On M28EVK: Tested-by: Marek Vasut <marex@xxxxxxx> Acked-by: Marek Vasut <marex@xxxxxxx> Thanks! Best regards, Marek Vasut -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
