drivers: adc: add dma support for ambiq adc driver

[AlessandroLuo]

This commit adds dma support for ambiq adc driver

[Copilot]

Pull Request Overview

This pull request adds DMA support to the Ambiq ADC driver. The changes include updating device tree overlays and YAML bindings to add new DMA properties, modifying the ADC driver implementation to support DMA transfers (including added DMA configuration, triggering, and completion handling), and updating related DTS and Kconfig files.

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
samples/drivers/adc/adc_dt/boards/apollo510_evb.overlay	Adjusted ADC channel indexes and added DMA-related properties
samples/drivers/adc/adc_dt/boards/apollo3_evb.overlay	Enabled DMA mode by adding dma-mode in the overlay
dts/bindings/adc/ambiq,adc.yaml	Introduced new DMA property definitions for dma-mode, dma-buffer-location, and dma-buffer-size
dts/arm/ambiq/*.dtsi	Removed unused counter nodes
drivers/adc/adc_ambiq.c	Added DMA configuration, updated buffer types, integrated semaphore for DMA completion, and refactored ADC initialization and ISR
drivers/adc/Kconfig.ambiq	Updated configuration to conditionally select timer and cache handling options
boards//.dts	Minor adjustments in pinmux and counter configurations

Comments suppressed due to low confidence (1)

drivers/adc/adc_ambiq.c:45

• [nitpick] Ensure that changing the buffer pointer type from uint16_t to uint32_t is consistently handled in all DMA data processing and that any dependent calculations or type conversions are updated accordingly.

uint16_t *buffer;  // changed to uint32_t *buffer;

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud