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
Changelog: v2: - 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 (7): 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 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