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drivers: adc: add adc support in npcx7 series

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NPCX7 includes a 10-bit resolution Analog-to-Digital Converter (ADC). Up
to 10 voltage inputs can be measured and a internal voltage reference
(VREF), 2.816V (typical) is used for measurement. It can be triggered
automatically in Autoscan mode. Each input channel is assigned a
separate result register, which is updated at the end of the conversion.

The CL also includes:
— Add npcx adc device tree declarations.
— Zephyr adc api implementation.
— Add adc definitions of npcx7 in
  tests/drivers/adc/adc_api/src/test_adc.c for supporting test suites.

Signed-off-by: Mulin Chao <MLChao@nuvoton.com>
This commit is contained in:
Mulin Chao 2020-08-17 11:02:38 +08:00 • committed by Anas Nashif
commit a279b4cfb7
15 changed files with 550 additions and 0 deletions
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2
drivers/adc/adc_shell.c
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@ -27,6 +27,8 @@
#define DT_DRV_COMPAT nxp_kinetis_adc16
#elif DT_HAS_COMPAT_STATUS_OKAY(st_stm32_adc)
#define DT_DRV_COMPAT st_stm32_adc
#elif DT_HAS_COMPAT_STATUS_OKAY(nuvoton_npcx_adc)
#define DT_DRV_COMPAT nuvoton_npcx_adc
#else
#error No known devicetree compatible match for ADC shell
#endif