In general, you can disable the drivers by preventing the operating system from loading them.
In order to do this, rename the key value of the driver in registry.
[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\YYYYYYDriver] "Dll" = "YYYYYY.dll"
Rename all key values from YYYYYY.dll to _YYYYYY.dll (e.g. colibri_touch.dll to _colibri_touch.dll)
The majority of the drivers entries can be found in the following registry key:
[HKLM\Drivers\Builtin]
The registry keys include:
| Interface | Registry for Colibri PXA |
Registry for Colibri Tegra |
Registry for Colibri VF50/VF61 |
|---|---|---|---|
| SDIO/MMC Card Host Controller | [HKLM\Drivers\Builtin\SDHC] | [HKLM\Drivers\Builtin\SDIO] | [HKLM\Drivers\Builtin\ESDHC] |
| PCCard/CF Controller (Channel 0) | [HKLM\Drivers\Builtin\PCC0] | (not available) | (not available) |
| USB Function | [HKLM\Drivers\Builtin\USBFN] (requires host driver to work) |
[HKLM\Drivers\Builtin\USBFN] | [HKLM\Drivers\Builtin\USBOTG\USBFN] |
| USB Host | [HKLM\Drivers\Builtin\OHCI] (requires function driver to work) |
[HKLM\Drivers\Builtin\USBEHCI1] and/or [HKLM\Drivers\Builtin\USBOTG\Hcd] |
[HKLM\Drivers\BuiltIn\HCD_HSHx and/or [HKLM\Drivers\Builtin\USBOTG\Hcd]] |
| Serial Port x | [HKLM\Drivers\Builtin\Serialx] | [HKLM\Drivers\Builtin\Serialx] | [HKLM\Drivers\Builtin\UARTx] |
| Wave Audio | [HKLM\Drivers\Builtin\WaveDev] | [HKLM\Drivers\Builtin\nvWaveDev] | [HKLM\Drivers\Builtin\WaveDev] |
| Resistive Touch | [HKLM\HARDWARE\DEVICEMAP\TOUCH] | [HKLM\HARDWARE\DEVICEMAP\TOUCH] | [HKLM\HARDWARE\DEVICEMAP\TOUCH] |
| Flashdisk File System | [HKLM\Drivers\BlockDevice\StrataFMD] | (disabling not supported yet) | [HKLM\Drivers\NAND_Flash] |
| Ethernet | PXA270 Vx.x: [HKLM\Comm\DM9000] PXA300 (XT) Vx.x, PXA310 Vx.x and PAX320 V1.x: [HKLM\Comm\AX88796] PXA320 V2.x: [HKLM\Comm\AX88796C] |
[HKLM\Drivers\Builtin\USBEHCI2] and [HKLM\Comm\AX88772B] see (a) |
[HKLM\Comm\ENET] |
| Display | The display driver cannot be disabled. To prevent the LCD pins from toggling: 1. disable the splash screen in the bootloader 2. [HKLM\Drivers\Display\Colibri] Type=-1 |
The display driver cannot be disabled. | The display driver cannot be disabled. |
(a) To save more power you have to send USBEHCI2 in to suspend mode. Call SetDevicePower(L"HCD1:", POWER_NAME, D4) in your code to suspend the device.
