From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4D62DC433EF for ; Tue, 29 Mar 2022 13:19:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237185AbiC2NVN (ORCPT ); Tue, 29 Mar 2022 09:21:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39898 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235208AbiC2NVM (ORCPT ); Tue, 29 Mar 2022 09:21:12 -0400 Received: from eu-smtp-delivery-151.mimecast.com (eu-smtp-delivery-151.mimecast.com [185.58.85.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id B52CB13FAF for ; Tue, 29 Mar 2022 06:19:29 -0700 (PDT) Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id uk-mta-20-W4MrfOwKNYyyVGBWIKZP5Q-1; Tue, 29 Mar 2022 14:19:26 +0100 X-MC-Unique: W4MrfOwKNYyyVGBWIKZP5Q-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) by AcuMS.aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) with Microsoft SMTP Server (TLS) id 15.0.1497.32; Tue, 29 Mar 2022 14:19:25 +0100 Received: from AcuMS.Aculab.com ([fe80::994c:f5c2:35d6:9b65]) by AcuMS.aculab.com ([fe80::994c:f5c2:35d6:9b65%12]) with mapi id 15.00.1497.033; Tue, 29 Mar 2022 14:19:25 +0100 From: David Laight To: 'Matthias Schiffer' CC: Greg Kroah-Hartman , Jiri Slaby , Russell King , "linux-serial@vger.kernel.org" , "linux-kernel@vger.kernel.org" , =?utf-8?B?SWxwbyBKw6RydmluZW4=?= , "Lino Sanfilippo" , Lukas Wunner Subject: RE: [PATCH] serial: Revert RS485 polarity change on UART open Thread-Topic: [PATCH] serial: Revert RS485 polarity change on UART open Thread-Index: AQHYQ1k5q26PsxFKq0WuXVn++R8i1qzWT4pQ///zlACAABGw4A== Date: Tue, 29 Mar 2022 13:19:25 +0000 Message-ID: References: <20220329085050.311408-1-matthias.schiffer@ew.tq-group.com> <20220329100328.GA2090@wunner.de> <749eee7dd2c7464a8c4d9ea5972205fa@AcuMS.aculab.com> <82266d339e09ad16963e16014cd836fa670b3a0c.camel@ew.tq-group.com> In-Reply-To: <82266d339e09ad16963e16014cd836fa670b3a0c.camel@ew.tq-group.com> Accept-Language: en-GB, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org RnJvbTogTWF0dGhpYXMgU2NoaWZmZXINCj4gU2VudDogMjkgTWFyY2ggMjAyMiAxNDowMw0KPiAN Cj4gT24gVHVlLCAyMDIyLTAzLTI5IGF0IDEyOjU1ICswMDAwLCBEYXZpZCBMYWlnaHQgd3JvdGU6 DQo+ID4gRnJvbTogTWF0dGhpYXMgU2NoaWZmZXINCj4gPiA+IFNlbnQ6IDI5IE1hcmNoIDIwMjIg MTE6MzkNCj4gPiAuLi4NCj4gPiA+IEkgZ3Vlc3MgdGhhdCB3b3VsZCB3b3JrLiBUaGUgZmFjdCB0 aGF0IGV2ZW4gdGhlIGRpZmZlcmVudA0KPiA+ID4gdmFyaWFudHMgb2YgdGhlIDgyNTAgYXJlIGlt cGxlbWVudGVkIGluY29uc2lzdGVudGx5IG1ha2VzIHRoaXMNCj4gPiA+IGVzcGVjaWFsbHkgdWds eS4uLiBJdCBjZXJ0YWlubHkgcHV0cyBhIGRhbXBlciBvbiB0aGUgZWZmb3J0cyB0bw0KPiA+ID4g bWFrZQ0KPiA+ID4gdGhlIGhhbmRsaW5nIG9mIFJTNDg1IGluIHNlcmlhbCBkcml2ZXJzIG1vcmUg Z2VuZXJpYy4NCj4gPg0KPiA+IE9uZSB0aGluZyB0byByZW1lbWJlciBpcyB0aGF0IFJTMjMyIChJ SVJDIHJlYWxseSBWLjM4KSBsaW5lIGRyaXZlcg0KPiA+IGNoaXBzIGFyZSB0eXBpY2FsbHkgaW52 ZXJ0aW5nLg0KPiA+DQo+ID4gU28gdGhlIG1vZGVtIHNpZ25hbHMgb24gYSBUVEwgbGV2ZWwgb3V0 cHV0IHdpbGwgaGF2ZSB0aGUNCj4gPiBvcHBvc2l0ZSBwb2xhcml0eSB0byB0aGF0IHJlcXVpcmVk IG9uIHRoZSBhY3R1YWwgY29ubmVjdG9yLg0KPiA+DQo+ID4gTm9ybWFsbHkgYSBVQVJUIHdpbGwg aGF2ZSBhbiAnYWN0aXZlIGhpZ2gnIHJlZ2lzdGVyIGJpdCBmb3INCj4gPiBhIG1vZGVtIHNpZ25h bCB0aGF0IGRyaXZlcyBhbmQgJ2FjdGl2ZSBsb3cnIHBpbiBzbyB5b3UgZ2V0DQo+ID4gdGhlIGNv cnJlY3QgcG9sYXJpdHkgd2l0aCBhbiBpbnZlcnRpbmcgbGluZSBkcml2ZXIuDQo+ID4NCj4gPiAJ RGF2aWQNCj4gPg0KPiANCj4gSW5kZWVkLiBBcyBmYXIgYXMgSSBjYW4gdGVsbCwgdGhpcyBwcm9w ZXJ0eSBvZiBVQVJUcyBpcyB3aGF0IGdvdCB1cw0KPiBpbnRvIHRoaXMgbWVzczogU29tZSBwZW9w bGUgaW50ZXJwcmV0ZWQgU0VSX1JTNDg1X1JUU19PTl9TRU5EIGFzICJzZXQNCj4gdGhlIFJUUyBm bGFnIGluIHRoZSBNQ1IgcmVnaXN0ZXIgb24gc2VuZCIsIHdoaWxlIG90aGVyIHRob3VnaHQgaXQN Cj4gc2hvdWxkIG1lYW4gInNldCB0aGUgUlRTIHBpbiB0byBoaWdoIG9uIHNlbmQiLCBsZWFkaW5n IHRvIG9wcG9zaXRlDQo+IGJlaGF2aW91cnMgaW4gZGlmZmVyZW50IFVBUlQgZHJpdmVycyAoYW5k IGV2ZW4gZGlmZmVyZW50IFVBUlQgdmFyaWFudHMNCj4gaW4gdGhlIHNhbWUgZHJpdmVyLCBpbiB0 aGUgY2FzZSBvZiB0aGUgODI1MCBmYW1pbHkpLg0KDQpIbW1tLi4uIEEgY29tcGxldGUgbWVzcy4N ClRoZSAnUlRTIHBpbicgdGhhdCBuZWVkcyB0byBnbyBoaWdoIGlzIHRoZSBvbmUgb24gdGhlICh0 eXBpY2FsbHkpICdEJw0KY29ubmVjdG9yIGFmdGVyIHRoZSBpbnZlcnRpbmcgbGluZSBkcml2ZXIu DQpOb3QgdGhlIHBpbiBvbiB0aGUgdWFydCBwYWNrYWdlLg0KSSdkIGV4cGVjdCBUVEwgbGV2ZWwg c2VyaWFsIGludGVyZmFjZXMgdG8gcmVxdWlyZSBhY3RpdmUgbG93DQptb2RlbSBzaWduYWxzLg0K DQpJZiBSUzQ4NSBpcyB0cnlpbmcgdG8gZG8gaGFsZiBkdXBsZXggdXNpbmcgUlRTIChyZXF1ZXN0 IHRvIHNlbmQpDQphbmQgQ1RTIChjbGVhciB0byBzZW5kKSB5b3UndmUgdHlwaWNhbGx5IGdvdCBi aWdnZXIgcHJvYmxlbXMNCnRoYW4gYXNzZXJ0aW5nIFJUUyBiZWZvcmUgYSB0cmFuc21pdC4NClRo ZSByZWFsIHByb2JsZW0gaXMgcmVtb3ZpbmcgUlRTIG9uY2UgdGhlIGxhc3QgdHJhbnNtaXQgZGF0 YSBiaXQNCih0aGUgc3RvcCBiaXQpIGhhcyBsZWZ0IHRoZSBVQVJUIHBpbi4NCkkndmUgdXNlZCBs b2NhbCBsb29wYmFjayAodHggdG8gcngpIHRvIGRldGVjdCB0aGF0IGluIHRoZSBwYXN0Lg0KDQpP ZiBjb3Vyc2UsIGlmIGl0IGlzIGp1c3QgZG9pbmcgZmxvdyBjb250cm9sIHRoYXQgc2hvdWxkIHVz ZSBSRlMNCihyZWFkeSBmb3Igc2VuZGluZykgdG8gaW5kaWNhdGUgc3BhY2UgaW4gdGhlIHJlY2Vp dmUgZmlmbyBidXQNCnVzaW5nIHRoZSBSVFMgcGluIGluc3RlYWQgdGhhdCBpcyBhIGRpZmZlcmVu dCBtYXR0ZXIuDQoNCglEYXZpZA0KDQotDQpSZWdpc3RlcmVkIEFkZHJlc3MgTGFrZXNpZGUsIEJy YW1sZXkgUm9hZCwgTW91bnQgRmFybSwgTWlsdG9uIEtleW5lcywgTUsxIDFQVCwgVUsNClJlZ2lz dHJhdGlvbiBObzogMTM5NzM4NiAoV2FsZXMpDQo=