RE: Kernel API's for ADC

2018-07-26 Thread chandrasekhar 
I am using freescale IMX6UL processor. I have to do it in kernel space, I
have a thermal printer attached to the processor and I have to continuously
monitor temperature of the printer head inorder to change he printing time
values. 
So based on the temperature values I have to decide dynamically how much the
printing time should be or if it reaches threshold I will throw a error. We
already wrote a driver which involves SPI communication, motor rotation and
strobe(heating the paper) handling in driver, within the same driver I want
the temperature/ADC reading has to be done. 

Thanks and Regards,
Chandrasekhar
-Original Message-
From: Greg KH [mailto:g...@kroah.com] 
Sent: Wednesday, July 25, 2018 7:17 PM
To: chandrasekhar
Cc: 'Daniel Baluta'; 'Kernelnewbies'
Subject: Re: Kernel API's for ADC

On Wed, Jul 25, 2018 at 04:47:29PM +0530, chandrasekhar wrote:
> Not on the sysfs interface. I want to read the ADC using kernel API's in
> kernel space.

For your specific driver and device, or for "any" driver/device?

And why do you need this, what are you going to do with that
information?

thanks,

greg k-h

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RE: Kernel API's for ADC

2018-07-25 Thread chandrasekhar 
Not on the sysfs interface. I want to read the ADC using kernel API's in
kernel space. 

Thanks and Regards,
Chandrasekhar

-Original Message-
From: Daniel Baluta [mailto:daniel.bal...@gmail.com] 
Sent: Wednesday, July 25, 2018 4:37 PM
To: chandrasekhar
Cc: Kernelnewbies
Subject: Re: Kernel API's for ADC

On Wed, Jul 25, 2018 at 1:25 PM, chandrasekhar 
wrote:
> Hi,
>
>
>
> Are there any kernel API's for ADC. I am using NXP IMX6UL processor. I
have
> to read ADC values in kernel space instead of sysfs/userspace.

It depends on the type of driver used. Either input or IIO.

The sysfs interface for IIO is described here:

https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-bus-iio


thanks,
Daniel.

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Kernel API's for ADC

2018-07-25 Thread chandrasekhar 
Hi,

 

Are there any kernel API's for ADC. I am using NXP IMX6UL processor. I have
to read ADC values in kernel space instead of sysfs/userspace.

 

Thanks and Regards,

Chandrasekhar

 

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