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Wed, 21 Apr 2021 18:07:52 +0800 Message-ID: <1618999672.25707.13.camel@mhfsdcap03> Subject: Re: [PATCH] clocksource/drivers/timer-mediatek: optimize systimer irq clear flow on Mediatek Socs From: Fengquan Chen To: Daniel Lezcano , Thomas Gleixner , Matthias Brugger , CC: , , Date: Wed, 21 Apr 2021 18:07:52 +0800 In-Reply-To: References: <1614670085-26229-1-git-send-email-Fengquan.Chen@mediatek.com> <1614670085-26229-2-git-send-email-Fengquan.Chen@mediatek.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.10.4-0ubuntu2 MIME-Version: 1.0 X-TM-SNTS-SMTP: 7FCA932D73FF3B2DC81C4B0FD3A5E49DA968D3CAE9ACD0F98B07D7C70245117B2000:8 X-MTK: N Content-Transfer-Encoding: base64 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org T24gTW9uLCAyMDIxLTAzLTIyIGF0IDExOjEwICswMTAwLCBEYW5pZWwgTGV6Y2FubyB3cm90ZToN Cj4gT24gMDIvMDMvMjAyMSAwODoyOCwgRmVuZ3F1YW4gQ2hlbiB3cm90ZToNCj4gPiAxKWVuc3Vy ZSBzeXN0aW1lciBpcyBlbmFibGVkIGJlZm9yZSBjbGVhciBhbmQgZGlzYWJsZSBpbnRlcnJ1cHQs IHdoaWNoIG9ubHkNCj4gPiBmb3Igc3lzdGltZXIgaW4gTWVkaWF0ZWsgU29jcy4NCj4gPg0KPiA+ IDIpY2xlYXIgYW55IHBlbmRpbmcgdGltZXItaXJxIHdoZW4gc2h1dGRvd24gdG8ga2VlcCBzdXNw ZW5kIGZsb3cgY2xlYW4sDQo+ID4gd2hlbiB1c2Ugc3lzdGltZXIgYXMgdGljay1icm9hZGNhc3Qg dGltZXINCj4gPiANCj4gPiBDaGFuZ2UtSWQ6IElhM2VkYTgzMzI0YWYyZmRhZjVjYmIzNTY5YTli ZjAyMGExMWY4MDA5DQo+IA0KPiBSZW1vdmUgdGhlIGFib3ZlLg0KPiANCj4gQWRkIGEgRml4ZXMg dGFnLg0KDQpUaGFua3MgZm9yIHJldmlldywgaGFzIGJlZW4gZml4ZWQgaW4gVjQ6DQpodHRwczov L3BhdGNod29yay5rZXJuZWwub3JnL3Byb2plY3QvbGludXgtbWVkaWF0ZWsvcGF0Y2gvMTYxNzk2 MDE2Mi0xOTg4LTItZ2l0LXNlbmQtZW1haWwtRmVuZ3F1YW4uQ2hlbkBtZWRpYXRlay5jb20vDQoN Cj4gDQo+ID4gU2lnbmVkLW9mZi1ieTogRmVuZ3F1YW4gQ2hlbiA8ZmVuZ3F1YW4uY2hlbkBtZWRp YXRlay5jb20+DQo+ID4gLS0tDQo+ID4gIGRyaXZlcnMvY2xvY2tzb3VyY2UvdGltZXItbWVkaWF0 ZWsuYyB8IDQgKysrKw0KPiA+ICAxIGZpbGUgY2hhbmdlZCwgNCBpbnNlcnRpb25zKCspDQo+ID4g DQo+ID4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvY2xvY2tzb3VyY2UvdGltZXItbWVkaWF0ZWsuYyBi L2RyaXZlcnMvY2xvY2tzb3VyY2UvdGltZXItbWVkaWF0ZWsuYw0KPiA+IGluZGV4IDkzMThlZGMu LjlmMWYwOTVkYyAxMDA2NDQNCj4gPiAtLS0gYS9kcml2ZXJzL2Nsb2Nrc291cmNlL3RpbWVyLW1l ZGlhdGVrLmMNCj4gPiArKysgYi9kcml2ZXJzL2Nsb2Nrc291cmNlL3RpbWVyLW1lZGlhdGVrLmMN Cj4gPiBAQCAtNzUsNiArNzUsNyBAQA0KPiA+ICBzdGF0aWMgdm9pZCBtdGtfc3lzdF9hY2tfaXJx KHN0cnVjdCB0aW1lcl9vZiAqdG8pDQo+ID4gIHsNCj4gPiAgCS8qIENsZWFyIGFuZCBkaXNhYmxl IGludGVycnVwdCAqLw0KPiA+ICsJd3JpdGVsKFNZU1RfQ09OX0VOLCBTWVNUX0NPTl9SRUcodG8p KTsNCj4gDQo+IAlTWVNUX0NPTl9FTiBpcyBzZXQgYmVsb3csIHdoeSBkbyB5b3UgaGF2ZSB0byBk byBpdCBiZWZvcmU/DQo+IA0KPiBJcyB0aGF0IGEgaHcgYnVnID8NCj4gDQo+IEl0IGlzIGNvbmZ1 c2luZyB3aGF0IHRoZSBkZXNjcmlwdGlvbiBvZiB0aGUgU1lTVF9DT05fRU4gc2F5czoNCj4gDQo+ IC8qDQo+ICAqIFNZU1RfQ09OX0VOOiBDbG9jayBlbmFibGUuIFNoYWxsIGJlIHNldCB0bw0KPiAg KiAgIC0gU3RhcnQgdGltZXIgY291bnRkb3duLg0KPiAgKiAgIC0gQWxsb3cgdGltZW91dCB0aWNr cyBiZWluZyB1cGRhdGVkLg0KPiAgKiAgIC0gQWxsb3cgY2hhbmdpbmcgaW50ZXJydXB0IGZ1bmN0 aW9ucy4NCj4gDQo+IFdoYXQgbWVhbnMgImludGVycnVwdCBmdW5jdGlvbnMiID8NCj4gDQo+IERv ZXMgd3JpdGluZyB3cml0ZWwoU1lTVF9DT05fRU4sIFNZU1RfQ09OX1JFRyh0bykpIGJlZm9yZQ0K PiBTWVNUX0NPTl9JUlFfQ0xSIGFsbG93cyB0byBjbGVhciB0aGUgaW50ZXJydXB0IGZsYWc/DQo+ IA0KPiBDYW4geW91IGV4cGxhaW4gaG93IHRoZSB0aW1lciB3b3JrcyByZWdhcmRpbmcgdGhpcyBw YXJ0Pw0KPiANCj4gSXQgc291bmRzIHRvIG1lIGEgYml0IHN0cmFuZ2UuDQo+IA0KPiAgKg0KPiAg KiBTWVNUX0NPTl9JUlFfRU46IFNldCB0byBhbGxvdyBpbnRlcnJ1cHQuDQo+ICAqDQo+ICAqIFNZ U1RfQ09OX0lSUV9DTFI6IFNldCB0byBjbGVhciBpbnRlcnJ1cHQuDQo+ICAqLw0KPiANCg0KVGhh bmtzIGZvciByZXZpZXcsIGRlc2NyaXB0aW9ucyBhYm91dA0KU1lTVF9DT05fSVJRX0NMUi9TWVNU X0NPTl9FTi9TWVNUX0NPTl9JUlFfRU4gaGF2ZSBiZWVuIHVwZGF0ZWQgaW4gdjQuDQoNCkFuZCBm b3Igc3lzdGltZXIsIHRoZXJlJ3MgYSBodyBsaW1pdGF0aW9uIHRoYXQgYmVmb3JlIGNsZWFyaW5n IHBlbmRpbmcNCmlycXMsIHdlIG11c3QgZW5hYmxlIHRpbWVyIGZpcnN0LiBzbyB3ZSBhZGRlZCBh IFNZU1RfQ09OX0VOIHdyaXRlIGJlZm9yZQ0KU1lTVF9DT05fSVJRX0NMUiB3cml0ZSB0byBlbnN1 cmUgaXJxIGNsZWFyIHN1Y2Nlc3NmdWxseS4NCg0KQWxzbywgd2UgY2Fubm90IG9ubHkgd3JpdGUg U1lTVF9DT05fSVJRX0NMUiB3aXRob3V0IFNZU1RfQ09OX0VOIGJpdCwNCmJlY2F1c2UgRU4gYml0 IGlzIGFsc28gdGltZXIgY2xvY2sgZW5hYmxlIGJpdC4gDQoNCnRoaXMgaXMgYSBoYXJkd2FyZCBk ZXNpZ24gbGltaXRhdGlvbiBidXQgbm90IGEgYnVnLg0KDQo+IA0KPiA+ICAJd3JpdGVsKFNZU1Rf Q09OX0lSUV9DTFIgfCBTWVNUX0NPTl9FTiwgU1lTVF9DT05fUkVHKHRvKSk7DQo+ID4gIH0NCj4g PiAgDQo+ID4gQEAgLTExMSw2ICsxMTIsOSBAQCBzdGF0aWMgaW50IG10a19zeXN0X2Nsa2V2dF9u ZXh0X2V2ZW50KHVuc2lnbmVkIGxvbmcgdGlja3MsDQo+ID4gIA0KPiA+ICBzdGF0aWMgaW50IG10 a19zeXN0X2Nsa2V2dF9zaHV0ZG93bihzdHJ1Y3QgY2xvY2tfZXZlbnRfZGV2aWNlICpjbGtldnQp DQo+ID4gIHsNCj4gPiArCS8qIENsZWFyIGFueSBpcnEgKi8NCj4gPiArCW10a19zeXN0X2Fja19p cnEodG9fdGltZXJfb2YoY2xrZXZ0KSk7DQo+ID4gKw0KPiA+ICAJLyogRGlzYWJsZSB0aW1lciAq Lw0KPiA+ICAJd3JpdGVsKDAsIFNZU1RfQ09OX1JFRyh0b190aW1lcl9vZihjbGtldnQpKSk7DQo+ ID4gIA0KPiA+IA0KPiANCj4gDQoNCg==