On 04/18/2013 06:38 PM, Ross Williamson wrote:
> Is this a bad idea from a RTlinux point of view or a style point of view?
It is a bad idea from a very general point of view. gpiolib does two things:
- it ensures that no two drivers try and request the same gpio
- if toggling a gpio state implies a read-modify-write operation, it
protects it with a spinlock, so that no two drivers can interrupt each
other and cause issues in the operation.
By accessing the registers directly, you do not get these protections.
--
Gilles.
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