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

Message ID 20201214112437.18757-1-m.szyprowski@samsung.com
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Series VIM3: add support for checking 'Function' button state | expand

Message

Marek Szyprowski Dec. 14, 2020, 11:24 a.m. UTC 
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
button Function
if test ${button} = on
then
	echo Selected alternative boot
	...
fi
--->8---

Best regards
Marek Szyprowski
Samsung R&D Institute Poland


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
  button: add a simple ADC-based button driver
  cmd: button: store button state in the 'button' env
  configs: khadas-vim3: enable Function button support

 cmd/button.c                  |   4 +-
 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 ++++++++++++++++++++++++
 8 files changed, 224 insertions(+), 3 deletions(-)
 create mode 100644 drivers/button/button-adc.c
 create mode 100644 drivers/clk/meson/g12a-ao.c