[PATCH v3 0/6] VIM3: add support for checking 'Function' button state

[Marek Szyprowski]

Hi All,

This patchset adds all building blocks needed for checking the 'Function'
button state in the boot script on Amlogic A311D based VIM3 board. This
button is connected to the ADC lines of the SoC, so it required to enable
meson SARADC, the clocks needed for it and a simple button-adc drivers.

Once applied, one can use following commands in the boot scripts:
-->8---
echo Checking Func button state: \\c
if button Function
then
	echo Selected alternative boot
	...
fi
--->8---
The above script requires commit a6bfd71a96 ("cmd/button: return button
status") already present in mainline tree.

Best regards
Marek Szyprowski
Samsung R&D Institute Poland


Changelog:
v3:
- removed 'button' env variable
- extended kconfig and patch descriptions

v2: https://lists.denx.de/pipermail/u-boot/2020-December/434991.html
- removed Change-Id tags
- split defconfig changes into ADC and button related

v1: https://lists.denx.de/pipermail/u-boot/2020-December/434875.html
- initial submission


Patch summary:

Marek Szyprowski (6):
  clk: meson: add minimal driver for g12a-ao clocks
  adc: meson-saradc: add G12A variant
  adc: meson-saradc: skip hardware init only if ADC is enabled
  configs: khadas-vim3: enable ADC device support
  button: add a simple ADC-based button driver
  configs: khadas-vim3: enable Function button support

 configs/khadas-vim3_defconfig |   4 ++
 drivers/adc/meson-saradc.c    |   9 ++-
 drivers/button/Kconfig        |   8 +++
 drivers/button/Makefile       |   1 +
 drivers/button/button-adc.c   | 117 ++++++++++++++++++++++++++++++++++
 drivers/clk/meson/Makefile    |   1 +
 drivers/clk/meson/g12a-ao.c   |  83 ++++++++++++++++++++++++
 7 files changed, 221 insertions(+), 2 deletions(-)
 create mode 100644 drivers/button/button-adc.c
 create mode 100644 drivers/clk/meson/g12a-ao.c

-- 
2.17.1