On Wed, 12 Dec 2018, Philippe Schenker wrote:

This prepares the MFD for the STMPE ADC driver. This commit introduces
devicetree settings that are used by the ADC and adds an init function.
Common ADC settings that are shared with the touchscreen driver can now
reside in the overlying MFD.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Max Krummenacher <redacted>
Signed-off-by: Philippe Schenker <redacted>
---

I moved now all enables back to the subdevices. The disable of ADC
block is now done at remove of mfd. I know this is not particularly
right, the right way to do this would be with a refcounter.

But I don't know how to implement this in this driver. If someone does
not agree to disable adc in remove of mfd, please give me some advice
in how to do it with refcounter.

Changes in v4:
 - New patch: split mfd changes into this precursor patch
 - Export the added stmpe811_adc_commmon_init function
 - Disabling adc when mfd is removed

Changes in v3: None
Changes in v2:
 - Move code to setup ADC to MFD device, as it is used by both drivers
   adc and touchscreen

 drivers/mfd/Kconfig       |  3 +-
 drivers/mfd/stmpe.c       | 68 +++++++++++++++++++++++++++++++++++++++
 include/linux/mfd/stmpe.h | 10 ++++++
 3 files changed, 80 insertions(+), 1 deletion(-)

For my own reference:
  Acked-for-MFD-by: Lee Jones [off-list ref]

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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