Hello Guennadi,
Please see my comments below.
Best Regards,
Libin
>-----Original Message-----
>From: Albert Wang
>Sent: Tuesday, November 27, 2012 7:21 PM
>To: Guennadi Liakhovetski
>Cc: cor...@lwn.net; linux-media@vger.kernel.org; Libin Yang
>Subject: RE: [PATCH 02/15] [media] marvell-ccic: add MIPI support for
>marvell-ccic driver
>
>Hi, Guennadi
>
>We will update the patch by following your good suggestion! :)
>
[snip]
>>> + pll1 = clk_get(dev, "pll1");
>>> + if (IS_ERR(pll1)) {
>>> + dev_err(dev, "Could not get pll1 clock\n");
>>> + return;
>>> + }
>>> +
>>> + tx_clk_esc = clk_get_rate(pll1) / 1000000 / 12;
>>> + clk_put(pll1);
>>
>>Once you release your clock per "clk_put()" its rate can be changed by some
>>other user,
>>so, your tx_clk_esc becomes useless. Better keep the reference to the clock
>>until clean up.
>>Maybe you can also use
>>devm_clk_get() to simplify the clean up.
>>
>That's a good suggestion.
>
[Libin] In our code design, the pll1 will never be changed after the system
boots up. Camera and other components can only get the clk without modifying it.
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