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From: jean-philippe francois <jp.francois@cynove.com>
To: "linux-omap@vger.kernel.org" <linux-omap@vger.kernel.org>,
	linux-media <linux-media@vger.kernel.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Subject: omap3 : isp clock a : Difference between dmesg frequency and actual frequency with 3.9
Date: Wed, 15 May 2013 15:34:44 +0200	[thread overview]
Message-ID: <CAGGh5h1CKAUKwdM=Y7W5_ycDoucXLVF8vpxpEKJF_5naGzhPDQ@mail.gmail.com> (raw)

Hi,

I am working on a dm3730 based camera.
The sensor input clock is provided by the cpu via the CAM_XCLK pin.
Here is the corresponding log :

[    9.115966] Entering cam_set_xclk
[    9.119781] omap3isp omap3isp: isp_set_xclk(): cam_xclka set to 24685714 Hz
[    9.121337] ov10x33 1-0010: sensor id : 0xa630
[   10.293640] Entering cam_set_xclk
[   10.297149] omap3isp omap3isp: isp_set_xclk(): cam_xclka set to 0 Hz
[   10.393920] Entering cam_set_xclk
[   10.397979] omap3isp omap3isp: isp_set_xclk(): cam_xclka set to 24685714 Hz

However, when mesured on the actual pin, the frequency is around 30 MHz

The crystal clock is 19.2 MHz
All this was correct with 3.6.11.

Jean-Philippe Francois

             reply	other threads:[~2013-05-15 13:34 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-05-15 13:34 jean-philippe francois [this message]
2013-05-16  7:54 ` omap3 : isp clock a : Difference between dmesg frequency and actual frequency with 3.9 jean-philippe francois
2013-05-16  8:21 ` jean-philippe francois
2013-05-16 11:21   ` Laurent Pinchart
2013-05-16 13:52     ` jean-philippe francois

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