Hi
On Mon, 8 Oct 2012, tingtingyang@xxxxxxxxxxxx wrote:
> Dear Guennadi,
> I am sorry , see you reply just now.
> I am in a puzzle about the soc camera 's init.
> In the following,
> 1. in soc_camera.c file
>
> static struct platform_driver __refdata soc_camera_pdrv = {
> .remove = __devexit_p(soc_camera_pdrv_remove),
> .driver = {
> .name = "soc-camera-pdrv",
> .owner = THIS_MODULE,
> },
> };
>
> 2.in pxa_camera.c file
>
> static struct platform_driver pxa_camera_driver = {
> .driver = {
> .name = PXA_CAM_DRV_NAME,
> .pm = &pxa_camera_pm,
> },
> .probe = pxa_camera_probe,
> .remove = __devexit_p(pxa_camera_remove),
> };
>
> My question is :
> In the soc board init file ,for example Devices.c .
arch/arm/mach-pxa/devices.c is not a board init file, it is common for all
PXA27x boards.
> I only find one
> platform_device declare , soc-camera-pdrv or PXA_CAM_DRV_NAME .
>
> But ,I think the two drivers should be both init . How the kernel do that ?
See, e.g. in arch/arm/mach-pxa/pcm990-baseboard.c:
pxa_set_camera_info(&pcm990_pxacamera_platform_data);
registers a platform device for the pxa_camera.c driver and
platform_device_register(&pcm990_camera[0]);
platform_device_register(&pcm990_camera[1]);
register two platform devices for the soc_camera.c driver, correcponding
to two camera sensors mt9v022 and mt9m001.
Thanks
Guennadi
>
> Regards
> tingtingyang
>
> From: Guennadi Liakhovetski
> Date: 2012-10-08 19:20
> To: tingtingyang
> Subject: Re: host driver of camera
> On Mon, 8 Oct 2012, tingtingyang@xxxxxxxxxxxx wrote:
>
> > Dear Guennadi
>
> I asked you to CC linux-media.
>
> Regards
> Guennadi
>
> > I am studing linux kernel 3.4.0 driver coed.
> > In the file of soc_camera.txt, has a word "
> > - camera host - an interface, to which a camera is connected. Typically a
> > specialised interface, present on many SoCs, e.g., PXA27x and PXA3xx, SuperH,
> > AVR32, i.MX27, i.MX31.
> > "
> > But,I can not find the driver of camera host driver in pxa27x.c .
> > I know ,the host driver in the pxa_camera.c ,but I do not understand how the function be called or init ,because there are nothing about the camera host in the file pxa27x.c .
> >
> > Where could I get some example code of camera host driver being probe ?
> > Best Wishes.
>
> ---
> Guennadi Liakhovetski, Ph.D.
> Freelance Open-Source Software Developer
> http://www.open-technology.de/
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
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