Re: [Xenomai] Xenomai RTDM Driver /dev/ Population

[Jan Kiszka <jan.kiszka@siemens.com>]

On 2013-01-28 15:52, Poole Jr, Donald R. wrote:
> Hello All,
> 
> I'm currently writing a driver using the Xenomai RTDM API, but had a question regarding where in the /dev/ hierarchy the driver gets instantiated.  When I do an ls –l on the /dev/ folder.  I don't see my driver listed  below is my device structure:
> 
> static struct rtdm_device gpe_device = {
>     .struct_version = RTDM_DEVICE_STRUCT_VER,
> 
>     .device_flags = RTDM_NAMED_DEVICE,
>     .context_size = sizeof(context_t),
>     .device_name = DEVICE_NAME,
> 
>     .open_nrt = pwm_rtdm_open_nrt,
> 
>     .ops = {
>         .close_nrt = pwm_rtdm_close_nrt,
>         .read_nrt = pwm_rtdm_read_nrt,
>         .write_nrt = pwm_rtdm_write_nrt,
>     },
> 
>     .device_class = RTDM_CLASS_EXPERIMENTAL,
>     .device_sub_class = SOME_SUB_CLASS,
>     .profile_version = 1,
>     .driver_name = "GPE",
>     .driver_version = RTDM_DRIVER_VER(0, 1, 2),
>     .peripheral_name = "GPIO PWM Engine (GPE)",
>     .provider_name = "Donald R. Poole, Jr.",
>     .proc_name = gpe_device.device_name,
> };
> 
> Could anyone point me in the right direction to see what it is that I might be doing wrong? Thanks in advance.

RTDM devices aren't registered with the Linux VFS layer. They live in
their own space, managed by Xenomai, addressable via Native's
rt_dev_open or the wrapped POSIX open call. The POSIX skin allows you to
address them as "/dev/mydevice" as well, but it acutally cuts "/dev/"
off before doing the open via RTDM.

Check /proc/xenomai/rtdm/named_devices to see if your device was registered.

Jan

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