arch/arm/imx9: Add SAR ADC support#18930
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Add support for the i.MX9 SAR ADC block. Based on the arm64 version but slightly different init due to SCMI and different channel mask for i.MX95. The driver provides initialization, deinitialization, channel-mask validation, and one-shot reads for the supported ADC channels. It also handles the ADC clock bring-up, power-up sequence, calibration, and raw 12-bit result extraction from the per-channel data registers. Signed-off-by: Peter van der Perk <peter.vanderperk@nxp.com>
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linguini1
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May 21, 2026
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Could you please expand on the testing information a little bit more?
xiaoxiang781216
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May 21, 2026
linguini1
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May 22, 2026
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Summary
Add support for the i.MX9 SAR ADC block.
Based on the arm64 version but slightly different init due to SCMI and different channel mask for i.MX95.
The driver provides initialization, deinitialization, channel-mask validation, and one-shot reads for the supported ADC channels. It also handles the ADC clock bring-up, power-up sequence, calibration, and raw 12-bit result extraction from the per-channel data registers.
Impact
New ADC feature
Testing
i.MX95 / NavQ95
PX4 ADC Driver, measuring input voltage on channel 0 being 433.
So
(432/4096 * 1.8) * 64.4 = 12.22matching input voltage 12.22V