From mboxrd@z Thu Jan 1 00:00:00 1970 From: Raj Kumar Subject: (no subject) Date: Sat, 18 Sep 2010 17:19:42 +0530 Message-ID: References: , , , , Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============5471817964010586065==" Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Mime-version: 1.0 Sender: linux-pm-bounces@lists.linux-foundation.org Errors-To: linux-pm-bounces@lists.linux-foundation.org To: stern@rowland.harvard.edu, linux-pm@lists.linux-foundation.org List-Id: linux-pm@vger.kernel.org --===============5471817964010586065== Content-Type: multipart/alternative; boundary="_8e5ce047-4651-4add-a1ef-122e806b0d48_" --_8e5ce047-4651-4add-a1ef-122e806b0d48_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Alan=2C =20 I have question regarding the CPU frequency subsystem through which the fre= quency of the CPU is scaled. e.g. If we have device driver (X device contains processor) that wants to s= cale its own processor based upon the workload=2C (DVFS driver for this processor is implemented and reg= istered with cpufreq subsystem) then X device driver when detects waorkload=2C Can this X device driver ca= ll policy governor APIS for scaling clock or this X device driver can directly calls DVFS driver APIs directly? I just want to know from our device driver how do call DVFS driver if DVFS = driver is registered with cpu frequency subsystem? =20 =20 =20 Regards Raj=20 =20 = --_8e5ce047-4651-4add-a1ef-122e806b0d48_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Alan=2C
 =3B
I have question regarding the CPU frequency subsystem through which the fre= quency of the CPU is scaled.
e.g. If we have device driver (X device contains processor) that wants to s= cale its own processor based
upon the workload=2C (DVFS driver for this processor is =3Bimplemented&= nbsp=3Band registered with =3Bcpufreq subsystem)
then X device driver when detects waorkload=2C =3B Can this X device dr= iver =3Bcall policy governor =3BAPIS for scaling clock or
this X device =3Bdriver can directly calls DVFS driver APIs directly? I just want to know from our device driver how do call DVFS driver if DVFS = driver is registered with cpu frequency subsystem?
 =3B
 =3B
 =3B
Regards
Raj =3B
 =3B
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