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GPIO active high/low handling on embedded devices

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From: <niels@...>
To: <linux-kernel@...>
Cc: <niels@...>
Subject: GPIO active high/low handling on embedded devices
Date: Tuesday, September 9, 2008 - 4:48 am

Hi,


I missing some functionality in the current GPIO interface which I am using in an

embedded environment.

It is not possible to specify if an output is low or high active on arch level.


IOW I want to activate or deactivate (on driver level) an output without having

to know if an output is high or low active, which should be specified on arch level.


Currently I created a structure with the gpio number and a boolean is_inverted,

and I added two functions called gpio_activate and gpio_deactivate, these

functions allow me to control the hardware independent of the low level

implementation, for example gpio_activate(RESET).


My question is if there is already such an solution or will the GPIO interface

support this functionality in the future?


Best regards,


Niels Langendorff


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Previous thread: [PATCH 1/2][RESEND] ext3: add an option to control error handling on file data by Hidehiro Kawai on Tuesday, September 9, 2008 - 4:49 am. (2 messages)

Next thread: undefined reference to `v4l_printk_ioctl' [Was: mmotm 2008-09-08-18-32 uploaded] by Jiri Slaby on Tuesday, September 9, 2008 - 5:26 am. (1 message)