Need a project manager

[Greg KH]

So, here's a first project for someone to take over.  The company needs
a few different types of drivers written here, but probably needs one
point of contact.

Sorry for the top posting, but the information on the type of devices
needed, along with the data sheets, are all below.

Anyone want to take this over?

If so, let me know, and then I can put out the call for developers to
help you out.

thanks,

greg k-h

----- Forwarded message from Janesh Ramakrishnan <jramakrishnan at neuropace.com> -----

Date: Thu, 16 Aug 2007 19:07:02 -0700
From: Janesh Ramakrishnan <jramakrishnan at neuropace.com>
To: Greg KH <greg at kroah.com>
Subject: Follow up : Linux Device Driver Development


Hi Greg

I'm just following up on our correspondence regarding the device drivers for PCA9552, AD9833, TMP401. I would appreciate it if you can let me know if there are any developments at your end regarding the above mentioned device drivers.

We have written a device driver for the BQ27350 and will release it to the Open Source Community shortly.

Best Regards,
Janesh

Firmware Engineer
NeuroPace Inc
Mountain View, CA 94040

-----Original Message-----
From: Janesh Ramakrishnan 
Sent: Thursday, August 02, 2007 3:34 PM
To: Janesh Ramakrishnan; 'Greg KH'
Subject: RE: Linux Device Driver Development



Hi Greg

Here's an addendum to the last email.

We'd also be very interested in a device driver for the PCA9552, a 16 bit I2C bus LED driver.

Relevant info can be located at http://www.nxp.com/#/pip/cb=[type=product,path=50807/41735/48878,final=PCA9552_5]|pip=[pip=PCA9552_5][0]

Let us know if you need more information that may help.

Regards
Janesh

Firmware Engineer
NeuroPace Inc
Mountain View, CA 94040


-----Original Message-----
From: Janesh Ramakrishnan 
Sent: Monday, July 30, 2007 4:53 PM
To: 'Greg KH'
Subject: RE: Linux Device Driver Development



Mr.Hartman

Thanks for your email. Responses to your questions are below:

>> 
>> We're just interested in using the following devices, but there seem
>> to be no linux drivers for them, nor are we aware if they are being
>> developed in the OS community.
>> 
>> 1. AD9833 -Low Power Programmable Waveform Generator. -
>> http://www.analog.com/UploadedFiles/Data_Sheets/AD9833.pdf 
> 
> How is this device connected to the processor?  Through SPI or some
> other serial-like interface?  What kind of interface to userspace
> would you like to see for this device?

The AD9833 is connected to the AT91SAM9261 SoC through a SPI interface. We'd like to use sysfs, but we're pretty open with the kind of interface to userspace. 

> 
>> 2. TMP401 -Programmable temperature sensor -
>> http://focus.ti.com/lit/ds/symlink/tmp401.pdf 
> 
> This is an I2C device, right?  Is there an I2C driver already for your
> system that this is connected to so that we would just need to create
> another monitoring driver for it?

Right, this is an I2C device. We wrote a couple of working I2C device drivers for the AD5259 - an I2C potentiometer and for the PCA9554 - an I2C Parallel Port Expander.

Driver file name: ad5259.c; ad5259 datasheet - (http://www.analog.com/UploadedFiles/Data_Sheets/AD5259.pdf)
Driver file name: pca9554.c; pca9554 datasheet - (http://focus.ti.com/lit/ds/symlink/pca9554.pdf)

I have attached ad5259.c and pca9554.c with this email.

> 
>> 3. BQ27350 -Single cell Li ion Battery Manager-
>> http://focus.ti.com/lit/ds/symlink/bq27350.pdf 
> 
> This document seems to be very messed up and I can not read it at all.
> Do you have another link for it anywhere?
> 

This is also an I2C driver. Here's another link, http://focus.ti.com/docs/prod/folders/print/bq27350.html, we downloaded the datasheet from this site. if you still have issues with viewing this the document or any other document, let me know and I will email them to you.


> 
> What kind of systems are these chips on?  A "normal" motherboard, or
> on an embedded system?
> 

Those chips are on a AT91SAM9261-EK system for embedded development. Here's the Preliminary for the AT91SAM9261 - http://www.atmel.com/dyn/resources/prod_documents/doc6062.pdf. 

Here are the board schematic files for AT91SAM9261-EK - http://www.atmel.com/dyn/resources/prod_documents/AT91SAM9261-EK%20Hardware%20Files.zip


> Any other detailed technical information that you might have for this
> would be greatly appreciated so that we can try to determine how much
> work this would take, and whom to assign it to.

Let us know if you need any specific detailed information and we will do our best to obtain the relevant information.

Thanks for your speedy response, Greg.
Janesh

----- End forwarded message -----