[PATCH v6 0/3] add imx93 adc support

[haibo.chen at nxp.com]

From: Haibo Chen <haibo.chen at nxp.com>

V6:
  -Change the Copyright to 2023
  -Power down the ADC if imx93_adc_calibration() if meet issue.
  -Add new error label in probe (error_adc_power_down)
  -Add back the pm_runtime_get_sync(dev) in imx93_adc_remove().
   Though in imx93_adc_remove(), already in pm runtime resume due to the useage
   of autosuspend logic. But call this pm_runtime_get_sync(dev) will make the
   code logic more clear and will make the runtime pm counter balance after
   pm_runtime_put_noidle(dev).

V5:
  -For ADC driver, use dev_err_probe() to replace dev_err() in dev_err_probe(). 
  -Add imx93_adc_power_down() in the probe error path.
  -Re-order the function in imx93_adc_remove(), make them inverse in probe().
  -Remove the pm_runtime_get_sync(dev) in imx93_adc_remove(), because this driver
   enable the pm_runtime autosuspend feature, and config the delay as 50ms. So when
   called imx93_adc_remove(), this device still in runtime resume state, no need to
   force resume the device back.
  -no changes for binding doc and dts.

V4:
  For ADC driver, re-define the ADC status show the relation to specific register bit.
  Redo the imx93_adc_remove(), change the return error sequence in imx93_adc_read_raw(),
  and use a direct string for indio_dev->name.
  For dt-bings, change the commit title and add maintainer's reviewed by tag
  For dts, no change.

V3:
  For dt-bings, add some change according to review comments, and pass dt_binding_check.
  For dts, add #io-channel-cells = <1>; to pass dtbs_check
  For ADC driver, no change.

V2:
  For ADC driver, add change according to matainer's commets.

Haibo Chen (3):
  iio: adc: add imx93 adc support
  dt-bindings: iio: adc: Add NXP IMX93 ADC
  arm64: dts: imx93: add ADC support

 .../bindings/iio/adc/nxp,imx93-adc.yaml       |  81 +++
 MAINTAINERS                                   |   4 +-
 .../boot/dts/freescale/imx93-11x11-evk.dts    |  12 +
 arch/arm64/boot/dts/freescale/imx93.dtsi      |  13 +
 drivers/iio/adc/Kconfig                       |  10 +
 drivers/iio/adc/Makefile                      |   1 +
 drivers/iio/adc/imx93_adc.c                   | 484 ++++++++++++++++++
 7 files changed, 604 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/nxp,imx93-adc.yaml
 create mode 100644 drivers/iio/adc/imx93_adc.c

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2.34.1