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Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?


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Old 09-20-2005, 10:25 AM   #1
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Registered: Jun 2005
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Query- Hardware probing

Hi Everybody

My problem is weird smwhat..i m also little bit confused but any help will be appreciated
I am using Freescale's i/MX21 board as target..i m using Linux on target board ..I want to know how peripheral i.e .LCD ,Keypad etc...Probing is done at bootup time of Linux on target..
i mean at what stage we can get to know about LCD initialization or keypad detection that if i change keypad it should automatically detect the changed keypad..

Actually i have to develop Application that have to detect Peripheral (just think keypad) dynamically..means if i change Keypad attached to the Target my application should detect this ...

1 more thing can i use keypad as a plug n play or only after restarting i can detect the keypad..

Pls let me know what ever u can tell in this regard

Old 09-20-2005, 11:45 AM   #2
LQ Guru
Registered: Nov 2004
Location: San Jose, CA
Distribution: Ubuntu
Posts: 8,507

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Well, that all depends on the type of "keypad" you refer to. Particularly the interface.

Linux loads all the built-in drivers in the kernel in some Linus Torvalds-defined order, then loads modules as specified using the modprobe configuration.

Hotplugging of devices is performed by the hotplug subsystem: an event-driven mechanism for the loading or resetting of drivers.


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