LCD_CAM: use the new clock API to get source frequencies

[bugadani]

cc #4502

Based on top of #4647

[Dominaezzz]

unused now

Suggested change

let clocks = Clocks::get();

[bugadani]

Thanks, CI will point these out, don't worry :)

[Copilot]

Pull request overview

This PR refactors the clock system to use a new clock tree API, primarily to support LCD_CAM peripherals and improve MCPWM clock management. The changes introduce unstable API features for advanced clock configuration while maintaining backward compatibility with existing APIs.

Key Changes

• Introduces new clock tree API with ClockConfig and peripheral-specific function clocks for MCPWM
• Refactors LCD_CAM drivers to query clock frequencies directly from the clock tree instead of the legacy Clocks struct
• Marks clock configuration types as unstable and makes SoC clock modules unstable-gated
• Removes deprecated clock fields from Clocks struct (pwm_clock, crypto_pwm_clock, crypto_clock)

Reviewed changes

Copilot reviewed 36 out of 36 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
esp-metadata/src/cfg/soc.rs	Marks ClockConfig as unstable
esp-metadata/devices/*.toml	Adds MCPWM function clock configurations for various ESP32 variants
esp-metadata-generated/src/generated*.rs	Generated clock tree types and functions for MCPWM peripherals
esp-metadata-generated/src/_build_script_utils.rs	Adds build script support for MCPWM clock node cfg flags
esp-hal/src/system.rs	Implements Clone for PeripheralGuard to support multiple clock guards
esp-hal/src/soc/*/mod.rs	Moves clock modules behind unstable feature flag
esp-hal/src/soc/*/clocks.rs	Implements MCPWM function clock enable/configure functions and makes CpuClock public
esp-hal/src/mcpwm/*.rs	Refactors MCPWM to use new clock API with PwmClockGuard
esp-hal/src/lcd_cam/*.rs	Updates LCD_CAM to query frequencies from clock tree
esp-hal/src/clock/mod.rs	Removes legacy clock types and fields, consolidates clock configuration
esp-hal/CHANGELOG.md	Documents the addition of unstable clock configuration and removal of legacy clock fields

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[Copilot]

Pull request overview

Copilot reviewed 30 out of 30 changed files in this pull request and generated 3 comments.

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