Embedded linux - Write dummy backlight device driver to mimic specific device

I have an application that controls the brightness of a screen directly by writing to "/sys/devices/platform/imx28-fb/pwm-backlight.0/backlight/pwm-backlight.0/brightness".

Since writing the application, the screen has been replaced and the kernel upgraded, so the new path does not match the path used by the application.

The application cannot be updated, so i need a dummy device driver to create the path "/sys/devices/platform/imx28-fb/pwm-backlight.0/backlight/pwm-backlight.0/brightness" , and be able to read and write a value between 0 and 4096 to the file "brightness".

The driver does not need any other function then read and write to "brightness".

The kernel version is 3.7.4.

The BSP is built using and old version of PTXDist.

Skills: C Programming, Embedded Software, Linux

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About the Employer:
( 0 reviews ) Norway

Project ID: #17185583

12 freelancers are bidding on average $155 for this job


how are you,sir? I am a ultimate developer who has rich experience in this field. If you contact me, you and i will all be happy. Thank you for your reply in advance. Embedded linux - Write dummy backlight device driv More

$155 USD in 1 day
(5 Reviews)
$155 USD in 3 days
(13 Reviews)

Hi I am very,very interested in your project My name is Shan Bin and I'm a Chinese developer. I have 6 years of development experience such this projects. I am a highly skilled developer in C, C++, C#, Python, Java, More

$155 USD in 3 days
(15 Reviews)

keen to do it, please discuss, negotiable price and duration

$94 USD in 5 days
(29 Reviews)

I have many years experience in linux driver delopment on imx6 SoC. I could do what you want. Thank you.

$155 USD in 3 days
(4 Reviews)

What driver is the one in use? Is its source code available? I feel that all that may be required is just a ln -s somewhere that the file *actually* is, if your application depends on the path that is there.

$155 USD in 3 days
(2 Reviews)

I have 2+ year of experience on Linux programing which includes adding service to kernel, device driver, kernel porting and developed application based on systems call. I will take less time to finish

$155 USD in 10 days
(0 Reviews)

Maybe a symbolic link can meet with your requirement. Event if not, I still think that writing a linux kernel driver is not the best choice.

$155 USD in 10 days
(0 Reviews)
$277 USD in 10 days
(0 Reviews)

I have worked on PHYTEC Boards for 3 years and what I understood is there is some mismatch in sysfs paths and device driver which I can easily do [login to view URL] I am serving Motorola solutions and can provide industrial More

$166 USD in 5 days
(0 Reviews)

I have a experience in Linux kernel development and have patched the mainline a couple of times. Relevant Skills and Experience Kernel programming is one my key areas of expertise and we can deliver according to the r More

$77 USD in 3 days
(0 Reviews)

Worked with PWM driver on a different platform. Has experience of writing character device drivers to enable sysfs entries and read/write to the same.

$155 USD in 3 days
(0 Reviews)