Re: [PATCH v8 1/7] media: V4L2: add temporary clock helpers

2013-04-11 Thread Guennadi Liakhovetski
Hi Barry On Thu, 11 Apr 2013, Barry Song wrote: Hi Guennadi, Typical video devices like camera sensors require an external clock source. Many such devices cannot even access their hardware registers without a running clock. These clock sources should be controlled by their consumers.

Re: [PATCH v8 1/7] media: V4L2: add temporary clock helpers

2013-04-11 Thread Barry Song
2013/4/11 Guennadi Liakhovetski g.liakhovet...@gmx.de: Hi Barry On Thu, 11 Apr 2013, Barry Song wrote: Hi Guennadi, Typical video devices like camera sensors require an external clock source. Many such devices cannot even access their hardware registers without a running clock. These

Re: [PATCH v8 1/7] media: V4L2: add temporary clock helpers

2013-04-11 Thread Guennadi Liakhovetski
On Thu, 11 Apr 2013, Barry Song wrote: 2013/4/11 Guennadi Liakhovetski g.liakhovet...@gmx.de: Hi Barry On Thu, 11 Apr 2013, Barry Song wrote: Hi Guennadi, Typical video devices like camera sensors require an external clock source. Many such devices cannot even access their

Re: [PATCH v8 1/7] media: V4L2: add temporary clock helpers

2013-04-11 Thread Barry Song
2013/4/11 Guennadi Liakhovetski g.liakhovet...@gmx.de: On Thu, 11 Apr 2013, Barry Song wrote: 2013/4/11 Guennadi Liakhovetski g.liakhovet...@gmx.de: Hi Barry On Thu, 11 Apr 2013, Barry Song wrote: Hi Guennadi, Typical video devices like camera sensors require an external clock

Re: [PATCH v8 1/7] media: V4L2: add temporary clock helpers

2013-04-11 Thread Mike Turquette
Quoting Barry Song (2013-04-11 01:59:28) 2013/4/11 Guennadi Liakhovetski g.liakhovet...@gmx.de: On Thu, 11 Apr 2013, Barry Song wrote: 2013/4/11 Guennadi Liakhovetski g.liakhovet...@gmx.de: Hi Barry On Thu, 11 Apr 2013, Barry Song wrote: Hi Guennadi, Typical video

Re: [PATCH v8 1/7] media: V4L2: add temporary clock helpers

2013-04-11 Thread Sylwester Nawrocki
Hi, On 04/11/2013 08:52 PM, Mike Turquette wrote: [...] So, you enable CFF, it provides its own clk_* implementation like clk_get_rate() etc. Now, PXA already has it defined in arch/arm/mach-pxa/clock.c. Don't think this is going to fly. agree. Hi, I came into this thread late and don't

Re: [PATCH v8 1/7] media: V4L2: add temporary clock helpers

2013-04-11 Thread Laurent Pinchart
Hi Mike, On Thursday 11 April 2013 11:52:58 Mike Turquette wrote: Quoting Barry Song (2013-04-11 01:59:28) 2013/4/11 Guennadi Liakhovetski g.liakhovet...@gmx.de: On Thu, 11 Apr 2013, Barry Song wrote: 2013/4/11 Guennadi Liakhovetski g.liakhovet...@gmx.de: On Thu, 11 Apr 2013, Barry

Re: [PATCH v8 1/7] media: V4L2: add temporary clock helpers

2013-04-10 Thread Barry Song
Hi Guennadi, Typical video devices like camera sensors require an external clock source. Many such devices cannot even access their hardware registers without a running clock. These clock sources should be controlled by their consumers. This should be performed, using the generic clock

[PATCH v8 1/7] media: V4L2: add temporary clock helpers

2013-04-08 Thread Guennadi Liakhovetski
Typical video devices like camera sensors require an external clock source. Many such devices cannot even access their hardware registers without a running clock. These clock sources should be controlled by their consumers. This should be performed, using the generic clock framework. Unfortunately