From: Sriram V <vshrirama@gmail.com>
To: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: linux-samsung-soc@vger.kernel.org
Subject: Re: domain off
Date: Sun, 10 Jan 2016 19:19:14 +0530 [thread overview]
Message-ID: <CAH9_wRN13+PKLsTL3kSonLUpzHo7zbQJZ658C4+fRZRxe=HeTw@mail.gmail.com> (raw)
In-Reply-To: <CAJKOXPe51YO3t1fhUdD1OsmXXcW3MoTwapvY4Y0q8QwaKrxzRg@mail.gmail.com>
Hi Krzysztof,
I see that in pm_genpd_sumarry, the domains are off. However, i still
see the clocks are on.
For example; isp and cam is turned off in pm_genpd_summary, however
cam clocks are still on.
Should'nt the clocks be turned off first and then the domain.
On Sun, Jan 10, 2016 at 11:45 AM, Krzysztof Kozlowski
<k.kozlowski@samsung.com> wrote:
> 2016-01-09 19:19 GMT+09:00 Sriram V <vshrirama@gmail.com>:
>>
>> Hello,
>>
>> I am trying to power down power domains which are not used but i am
>> unable to do so unless i write manually into the registers.
>>
>> Can anyone help me on the standard way to power down power domains on
>> a exynos 5422.
>>
>> I tried marking status /bts-status to disable in the device tree file
>> for pd-disp1, but that does not help.
>>
>> What is the standard way of powering down if they are not used. Do we
>> need to do using dt or somewhere in the kernel board file?
>
> Hi,
>
> The domains defined in DT (and enabled in DT... status=disabled marks
> the *node* as disabled, not the power domain) are automatically turned
> off when attached devices are runtime suspended. Use
> PM_DEBUG+PM_ADVANCED_DEBUG and then:
> cat /sys/kernel/debug/pm_genpd/pm_genpd_summary
>
> Domains not present there are not defined so they are left in default
> status set by bootloader (probably on).
>
> BR,
> Krzysztof
--
Regards,
Sriram
next prev parent reply other threads:[~2016-01-10 13:49 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-09 10:19 domain off Sriram V
2016-01-10 6:15 ` Krzysztof Kozlowski
2016-01-10 13:49 ` Sriram V [this message]
2016-01-10 23:27 ` Krzysztof Kozlowski
2016-01-11 1:48 ` Sriram V
2016-01-11 2:21 ` Krzysztof Kozlowski
2016-01-20 9:52 ` Sriram V
2016-01-20 10:12 ` Krzysztof Kozlowski
2016-01-20 10:35 ` Sriram V
2016-01-20 13:30 ` Krzysztof Kozłowski
2016-01-25 9:54 ` Sriram V
2016-01-25 11:40 ` Krzysztof Kozłowski
2016-02-04 12:21 ` Sriram V
2016-02-05 1:13 ` Krzysztof Kozłowski
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