From mboxrd@z Thu Jan 1 00:00:00 1970 From: MyungJoo Ham Subject: Re: Re: [for-next PATCH V2] PM / devfreq: Add sysfs node to expose available frequencies Date: Wed, 31 Oct 2012 02:11:07 +0000 (GMT) Message-ID: <3578820.552041351649466344.JavaMail.weblogic@epv6ml03> Reply-To: myungjoo.ham@samsung.com Mime-Version: 1.0 Content-Type: text/plain; charset=euc-kr Content-Transfer-Encoding: base64 Return-path: Received: from mailout4.samsung.com ([203.254.224.34]:14776 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932069Ab2JaCLK (ORCPT ); Tue, 30 Oct 2012 22:11:10 -0400 Received: from epcpsbge2.samsung.com (epcpsbge2 [203.254.230.12]) by mailout4.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0MCQ00L5HJDJYWB0@mailout4.samsung.com> for linux-pm@vger.kernel.org; Wed, 31 Oct 2012 11:11:08 +0900 (KST) MIME-version: 1.0 Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: "Rafael J. Wysocki" Cc: Nishanth Menon , linux-pm , Rajagopal Venkat , =?euc-kr?Q?=B9=DA=B0=E6=B9=CE?= , Kevin Hilman , "linux-kernel@vger.kernel.org" PiBPbiBGcmlkYXksIE9jdG9iZXIgMjYsIDIwMTIgMDY6MTY6MzYgQU0gTXl1bmdKb28gSGFtIHdy b3RlOg0KPiA+ID4gZGV2ZnJlcSBnb3Zlcm5vcnMgc3VjaCBhcyBvbmRlbWFuZCBhcmUgY29udHJv bGxlZCBieSBhIG1pbiBhbmQNCj4gPiA+IG1heCBmcmVxdWVuY3ksIHdoaWxlIGdvdmVybm9ycyBs aWtlIHVzZXJzcGFjZSBnb3Zlcm5vciBhbGxvdyB1cw0KPiA+ID4gdG8gc2V0IGEgc3BlY2lmaWMg ZnJlcXVlbmN5Lg0KPiA+ID4gSG93ZXZlciwgZm9yIHRoZSBzYW1lIHNwZWNpZmljIGRldmljZSwg ZGVwZW5kaW5nIG9uIHRoZSBTb0MsIHRoZQ0KPiA+ID4gYXZhaWxhYmxlIGZyZXF1ZW5jaWVzIGNh biB2YXJ5Lg0KPiA+ID4gDQo+ID4gPiBTbyBleHBvc2UgdGhlIGF2YWlsYWJsZSBmcmVxdWVuY2ll cyBhcyBhIHNuYXBzaG90IG92ZXIgc3lzZnMgdG8NCj4gPiA+IGFsbG93IGluZm9ybWVkIGRlY2lz aW9ucy4NCj4gPiA+IA0KPiA+ID4gVGhpcyB3YXMgaW5zcGlyZWQgYnkgY3B1ZnJlcSBmcmFtZXdv cmsncyBlcXVpdmFsZW50IGZvciBzaW1pbGFyDQo+ID4gPiB1c2FnZSBzeXNmcyBub2RlOiBzY2Fs aW5nX2F2YWlsYWJsZV9mcmVxdWVuY2llcy4NCj4gPiA+IA0KPiA+ID4gQ2M6IFJhamFnb3BhbCBW ZW5rYXQgPHJhamFnb3BhbC52ZW5rYXRAbGluYXJvLm9yZz4NCj4gPiA+IENjOiBNeXVuZ0pvbyBI YW0gPG15dW5nam9vLmhhbUBzYW1zdW5nLmNvbT4NCj4gPiA+IENjOiBLeXVuZ21pbiBQYXJrIDxr eXVuZ21pbi5wYXJrQHNhbXN1bmcuY29tPg0KPiA+ID4gQ2M6ICJSYWZhZWwgSi4gV3lzb2NraSIg PHJqd0BzaXNrLnBsPg0KPiA+ID4gQ2M6IEtldmluIEhpbG1hbiA8a2hpbG1hbkB0aS5jb20+DQo+ ID4gPiBDYzogbGludXgtcG1Admdlci5rZXJuZWwub3JnDQo+ID4gPiBDYzogbGludXgta2VybmVs QHZnZXIua2VybmVsLm9yZw0KPiA+ID4gDQo+ID4gPiBTaWduZWQtb2ZmLWJ5OiBOaXNoYW50aCBN ZW5vbiA8bm1AdGkuY29tPg0KPiA+IA0KPiA+IEFja2VkLWJ5OiBNeXVuZ0pvbyBIYW0gPG15dW5n am9vLmhhbUBzYW1zdW5nLmNvbT4NCj4gDQo+IEFyZSB5b3UgZ29pbmcgdG8gaGFuZGxlIHRoaXMg cGF0Y2g/DQoNClllcywgSSd2ZSBqdXN0IHNldHVwIHRoZSBnaXQgcmVwb3NpdG9yeSB0aGlzIHdl ZWsNCmFuZCBJJ20gd2lsbGluZyB0byBoYW5kbGUgdGhpcyBvbmUuDQoNCkl0IGlzIGFwcGxpZWQg YXQNCmh0dHA6Ly9naXQua2VybmVsLm9yZy8/cD1saW51eC9rZXJuZWwvZ2l0L216eC9kZXZmcmVx LmdpdDthPXNob3J0bG9nO2g9cmVmcy9oZWFkcy9mb3ItcmFmYWVsDQoNClRoYW5rcywNCg0KTXl1 bmdKb28NCg0KPiANCj4gUmFmYWVsDQo+IA0KPiANCj4gLS0gDQo+IEkgc3BlYWsgb25seSBmb3Ig bXlzZWxmLg0KPiBSYWZhZWwgSi4gV3lzb2NraSwgSW50ZWwgT3BlbiBTb3VyY2UgVGVjaG5vbG9n eSBDZW50ZXIuDQo+IA0KPiANCj4gDQo+ICAgICAgICANCj4gICANCj4gICAgICAgICAgDQo+IA0K From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933787Ab2JaCLR (ORCPT ); Tue, 30 Oct 2012 22:11:17 -0400 Received: from mailout2.samsung.com ([203.254.224.25]:48318 "EHLO mailout2.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932069Ab2JaCLP (ORCPT ); Tue, 30 Oct 2012 22:11:15 -0400 X-AuditID: cbfee60c-b7fb06d00000355f-b7-509088bdd0f8 Date: Wed, 31 Oct 2012 02:11:09 +0000 (GMT) From: MyungJoo Ham Subject: Re: Re: [for-next PATCH V2] PM / devfreq: Add sysfs node to expose available frequencies To: "Rafael J. Wysocki" Cc: Nishanth Menon , linux-pm , Rajagopal Venkat , =?euc-kr?Q?=B9=DA=B0=E6=B9=CE?= , Kevin Hilman , "linux-kernel@vger.kernel.org" Reply-to: myungjoo.ham@samsung.com MIME-version: 1.0 X-MTR: 20121031020552074@myungjoo.ham Msgkey: 20121031020552074@myungjoo.ham X-EPLocale: ko_KR.euc-kr X-Priority: 3 X-EPWebmail-Msg-Type: personal X-EPWebmail-Reply-Demand: 0 X-EPApproval-Locale: X-EPHeader: ML X-EPTrCode: X-EPTrName: X-MLAttribute: X-RootMTR: 20121031020552074@myungjoo.ham X-ParentMTR: X-ArchiveUser: X-CPGSPASS: N Content-type: text/plain; charset=euc-kr MIME-version: 1.0 Message-id: <3578820.552041351649466344.JavaMail.weblogic@epv6ml03> DLP-Filter: Pass X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrKKsWRmVeSWpSXmKPExsVy+t8zPd29HRMCDD5OkrW4vGsOmwOjx+dN cgGMUVw2Kak5mWWpRfp2CVwZr95tYyz4wF+x890k9gbGHfxdjJwcQgLqEouWnGQDsSUETCTu bj/EAmGLSVy4tx4ozgVUM4tR4vPJBYwwRWc2PWWESMxnlFjW/A6sm0VAVeLluTXMXYwcHGwC ehIzPyeDhIUFEiUW3DgP1isCVLLlyX92kF5mgUVMEmdv/WOGuEJJYs2+V2CbeQUEJU7OfAJ1 harEhW3XWSHiahJLd92CiktIzJp+gRXC5pWY0f4UKi4nMe3rGmYIW1ri/KwNjDDfLP7+GCrO L3Hs9g4mkDtBep/cD4YZs3vzF2hACEhMPXOQEaJES6JlohVEmE9izcK3LDBTdp1azgzTen/L XCYQm1lAUWJK90N2CFtL4suPfWzovuIVcJb4t6iLeQKj8iwkqVlI2mchaUdWs4CRZRWjaGpB ckFxUnqqkV5xYm5xaV66XnJ+7iZGSFrg2cE4p8HiEKMAB6MSD6/Bv/4AIdbEsuLK3EOMEhzM SiK8FzMmBAjxpiRWVqUW5ccXleakFh9i9AHG30RmKdHkfGDKyiuJNzQ2MDY0tDQ0M7U0NcAh rCTOW+eREiAkkJ5YkpqdmlqQWgQzjomDU6qB0e3s8h8M9YWO7WmysUrnu5mnak9YbCO338b3 xdxr+49WSkkWzdB7ILMu8/mMJEs70RBF3SA15s1M788zMe/j3XRIbfuE56pih+1CyybXG6qz 20Y0Nf0x2sccGvnjft55UcFfry4lhB07I/RU8edqt0N3vzyMqYsoZpaIOW9nYC4cxFqX/51X iaU4I9FQi7moOBEAFsD9ZTgDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrFKsWRmVeSWpSXmKPExsVy+t/t6bp7OyYEGMz4LmFxedccNgdGj8+b 5AIYozJsMlITU1KLFFLzkvNTMvPSbZW8g+Od403NDAx1DS0tzJUU8hJzU22VXHwCdN0yc4CG KimUJeaUAoUCEouLlfTtbIryS0tSFTLyi0tslaKNDIz1jExN9IyMDfRMDGKtDA0MjEyBqhIy Ml6928ZY8IG/Yue7SewNjDv4uxg5OYQE1CUWLTnJBmJLCJhInNn0lBHCFpO4cG89UJwLqGY+ o8Sy5ndgRSwCqhIvz61h7mLk4GAT0JOY+TkZJCwskCix4MZ5sF4RoJItT/6zg/QyCyxikjh7 6x8zxDIliTX7XrGA2LwCghInZz5hgVimKnFh23VWiLiaxNJdt6DiEhKzpl9ghbB5JWa0P4WK y0lM+7qGGcKWljg/awPc0Yu/P4aK80scu72DCeROkN4n94Nhxuze/AXqXwGJqWcOMkKUaEm0 TLSCCPNJrFn4lgVmyq5Ty5lhWu9vmcsEYjMLKEpM6X7IDmFrSXz5sY8N3Ve8As4S/xZ1MU9g lJuFJDULSfssJO3IahYwsqxiFE0tSC4oTkpPNdIrTswtLs1L10vOz93ECE5Qz3h2MM5psDjE KMDBqMTDa/CvP0CINbGsuDL3EKMEB7OSCO/FjAkBQrwpiZVVqUX58UWlOanFhxh9gPE3kVlK NDkfmDzzSuINjQ2MDQ0tzQ1MDY0scAgrifPWeaQECAmkJ5akZqemFqQWwYxj4uCUamDUbz1x SU/tiYuORUxcncXho3paq5c4Rs5K51wgx7rg6+1r/OWdd2ft+uxddO3P9U2Ohcw2C4/n8lYp Xd5ZUSe3q8V6Z8m72TPOxRy5YL6Zz+H1/ppziYn6wTsTu6fcs7R+O0/xkWjetdMB/fos+YsF WxgO5MXq7C/Lzig5l6AXJ3b3k+sZCxklluKMREMt5qLiRABYKPh/fQMAAA== X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by mail.home.local id q9V2BMKi015998 > On Friday, October 26, 2012 06:16:36 AM MyungJoo Ham wrote: > > > devfreq governors such as ondemand are controlled by a min and > > > max frequency, while governors like userspace governor allow us > > > to set a specific frequency. > > > However, for the same specific device, depending on the SoC, the > > > available frequencies can vary. > > > > > > So expose the available frequencies as a snapshot over sysfs to > > > allow informed decisions. > > > > > > This was inspired by cpufreq framework's equivalent for similar > > > usage sysfs node: scaling_available_frequencies. > > > > > > Cc: Rajagopal Venkat > > > Cc: MyungJoo Ham > > > Cc: Kyungmin Park > > > Cc: "Rafael J. Wysocki" > > > Cc: Kevin Hilman > > > Cc: linux-pm@vger.kernel.org > > > Cc: linux-kernel@vger.kernel.org > > > > > > Signed-off-by: Nishanth Menon > > > > Acked-by: MyungJoo Ham > > Are you going to handle this patch? Yes, I've just setup the git repository this week and I'm willing to handle this one. It is applied at http://git.kernel.org/?p=linux/kernel/git/mzx/devfreq.git;a=shortlog;h=refs/heads/for-rafael Thanks, MyungJoo > > Rafael > > > -- > I speak only for myself. > Rafael J. Wysocki, Intel Open Source Technology Center. > > > > > > > {.n++%ݶw{.n+{G{ayʇڙ,jfhz_(階ݢj"mG?&~iOzv^m ?I