[documentation][device_driver_model] Add Chinese regulator docs and INDEX

Co-authored-by: BernardXiong <1241087+BernardXiong@users.noreply.github.com>

documentation/6.components/device-driver/INDEX.md

@@ -1,6 +1,7 @@
 @page page_device Device Driver
 
 - @subpage page_device_framework
+- @subpage page_device_dm
 - @subpage page_device_pin
 - @subpage page_device_uart
 - @subpage page_device_adc

documentation/6.components/device-driver/device_driver_model/INDEX.md

@@ -0,0 +1,361 @@
+# Device Driver Model (DM) Documentation Index
+
+This directory contains comprehensive documentation for RT-Thread's Device Driver Model and related subsystems.
+
+## Core Documentation
+
+- **[README.md](README.md)** - Device Driver Model Overview (English)
+  - DM architecture and concepts
+  - Bus, driver, and platform device models
+  - OFW/Device Tree integration
+  - Common APIs and usage patterns
+  - Migration guide
+
+- **[README_zh.md](README_zh.md)** - 设备驱动模型概述 (中文)
+  - DM 架构和概念
+  - 总线、驱动和平台设备模型
+  - OFW/设备树集成
+  - 通用 API 和使用模式
+  - 迁移指南
+
+## Module-Specific Documentation
+
+### Power Management
+
+#### Regulator Framework
+- **[regulator/README.md](regulator/README.md)** - Voltage/Current Regulator (English)
+- **[regulator/README_zh.md](regulator/README_zh.md)** - 电压/电流调节器 (中文)
+
+**Status**: ✅ Complete  
+**Topics Covered**:
+- Consumer API with complete examples
+- Provider (driver) implementation guide
+- Device tree bindings (fixed, GPIO, SCMI)
+- Best practices and troubleshooting
+- Performance considerations
+
+#### Clock Framework
+- **clk/** - Clock Management Framework
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- Clock consumer API
+- Clock provider implementation
+- Clock tree management
+- Fixed-rate, PLL, mux, divider clocks
+- Device tree bindings
+
+#### Pin Control
+- **pinctrl/** - Pin Multiplexing and Configuration
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- Pin configuration API
+- Pin multiplexing
+- Pin control driver implementation
+- Device tree bindings
+
+#### Reset Controller
+- **reset/** - Reset Controller Framework
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- Reset consumer API
+- Reset provider implementation
+- Device tree bindings
+
+#### Power Domain
+- **pmdomain/** - Power Domain Management
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- Power domain consumer API
+- Power domain provider implementation
+- Domain hierarchy
+- Device tree bindings
+
+### Interrupt and Timing
+
+#### Platform Interrupt Controller
+- **pic/** - Platform Interrupt Controller
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- IRQ domain management
+- IRQ mapping
+- PIC driver implementation
+
+#### Hardware Timer
+- **hwtimer/** - Hardware Timer Framework (with DM support)
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- Timer API with DM
+- Timer driver implementation
+- Device tree bindings
+
+### Storage and Memory
+
+#### NVMEM
+- **nvmem/** - Non-Volatile Memory Framework
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- NVMEM consumer API
+- NVMEM provider implementation
+- EEPROM, OTP, eFuse support
+- Device tree bindings
+
+#### Block Devices
+- **block/** - Block Device Layer (with DM support)
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- Block device API with DM
+- Partition support
+- Device tree bindings
+
+#### MTD
+- **mtd/** - Memory Technology Device (with DM support)
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- MTD framework with DM
+- NOR/NAND flash support
+- Device tree bindings
+
+### Communication
+
+#### Mailbox
+- **mailbox/** - Mailbox/Doorbell Framework
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- Mailbox consumer API
+- Mailbox controller driver
+- Inter-processor communication
+- Device tree bindings
+
+#### DMA
+- **dma/** - DMA Engine Framework
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- DMA consumer API
+- DMA controller driver
+- DMA transfer types
+- Device tree bindings
+
+### Bus Controllers
+
+#### PCI
+- **pci/** - PCI Bus Support
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- PCI device enumeration
+- PCI driver implementation
+- PCIe host controller
+- Device tree bindings
+
+#### I2C (DM Extensions)
+- **i2c/** - I2C with DM Support
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- I2C with device tree
+- I2C controller driver with DM
+
+#### SPI (DM Extensions)
+- **spi/** - SPI with DM Support
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- SPI with device tree
+- SPI controller driver with DM
+
+### Specialized Hardware
+
+#### Thermal Management
+- **thermal/** - Thermal Management Framework
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- Thermal zone management
+- Thermal cooling devices
+- Trip points
+- Device tree bindings
+
+#### Multi-Function Device
+- **mfd/** - Multi-Function Device Framework
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- MFD parent device
+- Sub-device registration
+- Shared resources
+- Device tree bindings
+
+#### Industrial I/O
+- **iio/** - Industrial I/O Subsystem
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- IIO device framework
+- Channels and attributes
+- Buffered data capture
+- Device tree bindings
+
+#### PHY Framework
+- **phy/** - Physical Layer Framework
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- PHY consumer API
+- PHY provider implementation
+- USB, PCIe, SATA PHY support
+- Device tree bindings
+
+#### Ethernet PHY
+- **phye/** - Ethernet PHY Framework
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- Ethernet PHY management
+- MDIO bus
+- PHY drivers
+- Device tree bindings
+
+### System Support
+
+#### Open Firmware (OFW)
+- **ofw/** - Device Tree Support
+
+**Status**: ⚠️ Partially Documented  
+**Existing**: [../ofw/dtc.md](../ofw/dtc.md)  
+**Additional Planned Topics**:
+- FDT parsing internals
+- OFW API reference
+- Property reading helpers
+- IRQ and address translation
+
+#### Firmware
+- **firmware/** - Firmware Framework
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- ARM SCMI support
+- Firmware loading
+- Device tree bindings
+
+#### Hardware Cache
+- **hwcache/** - Hardware Cache Management
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- Cache controller framework
+- L2/L3 cache management
+
+#### Hardware Spinlock
+- **hwspinlock/** - Hardware Spinlock
+
+**Status**: 📝 To Be Documented  
+**Planned Topics**:
+- Hardware spinlock API
+- Multi-core synchronization
+
+## Documentation Standards
+
+All module documentation should include:
+
+1. **Introduction**
+   - General concept overview
+   - RT-Thread specific implementation
+   - Use cases
+
+2. **Kconfig Configuration**
+   - All configuration options
+   - Menuconfig location
+   - Dependencies
+
+3. **Device Tree Bindings**
+   - Standard properties
+   - Example DTS nodes
+   - Consumer usage examples
+
+4. **Application Layer API**
+   - Complete function reference
+   - Parameter descriptions
+   - Return values
+   - Usage examples
+
+5. **Driver Implementation Guide**
+   - Key structures
+   - Operations to implement
+   - Complete driver examples
+   - Best practices
+
+6. **Comprehensive Examples**
+   - Real-world use cases
+   - Complete working code
+   - Error handling patterns
+
+7. **Troubleshooting**
+   - Common issues
+   - Debugging tips
+   - Performance considerations
+
+8. **Architecture Diagrams** (SVG)
+   - Component relationships
+   - Data flow
+   - Clear and professional formatting
+
+## Contributing
+
+When adding new module documentation:
+
+1. Follow the structure established by the regulator documentation
+2. Include both English and Chinese versions
+3. Provide complete, tested code examples
+4. Create clear SVG diagrams
+5. Cross-reference related modules
+6. Update this INDEX.md file
+
+## Status Legend
+
+- ✅ Complete - Full documentation available
+- ⚠️ Partial - Some documentation exists, needs completion
+- 📝 To Be Documented - Planned but not yet created
+- 🚧 In Progress - Currently being written
+
+## Priority Modules
+
+Based on usage frequency and importance:
+
+1. ✅ **regulator** - Complete
+2. **clk** - High priority (power management)
+3. **pinctrl** - High priority (hardware configuration)
+4. **reset** - High priority (hardware control)
+5. **ofw** - High priority (device tree)
+6. **pic** - Medium priority (interrupt handling)
+7. **dma** - Medium priority (data transfer)
+8. **nvmem** - Medium priority (persistent data)
+9. **mailbox** - Medium priority (IPC)
+10. **thermal** - Medium priority (power management)
+
+Other modules follow based on community needs and hardware support requirements.
+
+## Related Documentation
+
+- [Device Driver Framework](../framework/device.md) - Basic device model
+- [Device Tree Compiler](../ofw/dtc.md) - DTC tool usage
+- [I2C Driver](../i2c/i2c.md) - Traditional I2C (compare with DM)
+- [SPI Driver](../spi/spi.md) - Traditional SPI (compare with DM)
+- [PIN Driver](../pin/pin.md) - Traditional PIN (compare with DM)
+
+## External References
+
+- [Device Tree Specification](https://devicetree-specification.readthedocs.io/)
+- [Linux Kernel Driver Model](https://www.kernel.org/doc/html/latest/driver-api/driver-model/)
+- [Linux Device Tree Bindings](https://www.kernel.org/doc/Documentation/devicetree/bindings/)
+- RT-Thread Source: `components/drivers/`