From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andreas Kemnade Subject: Re: [RFC PATCH 00/10] Netronix embedded controller driver for Kobo and Tolino ebook readers Date: Mon, 6 Jul 2020 21:28:48 +0200 Message-ID: <20200706212848.7e19886b@aktux> References: <20200620223915.1311485-1-j.neuschaefer@gmx.net> <20200630084051.66feadea@aktux> <20200630071523.GA2983@latitude> <20200630221447.3e03ae28@aktux> <20200704205808.GD2578@latitude> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Return-path: Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45892 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725892AbgGFT3X (ORCPT ); Mon, 6 Jul 2020 15:29:23 -0400 In-Reply-To: <20200704205808.GD2578@latitude> Sender: linux-pwm-owner@vger.kernel.org List-Id: linux-pwm@vger.kernel.org To: Jonathan =?UTF-8?B?TmV1c2Now6RmZXI=?= Cc: linux-kernel@vger.kernel.org, Lee Jones , Rob Herring , Thierry Reding , Uwe =?UTF-8?B?S2xlaW5lLUvDtm5pZw==?= , Alessandro Zummo , Alexandre Belloni , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , Sam Ravnborg , Linus Walleij , Heiko Stuebner , Stephan Gerhold , Lubomir Rintel , Mark Brown , allen On Sat, 4 Jul 2020 22:58:08 +0200 Jonathan Neusch=C3=A4fer wrote: > On Tue, Jun 30, 2020 at 10:14:47PM +0200, Andreas Kemnade wrote: > > On Tue, 30 Jun 2020 09:15:23 +0200 > > Jonathan Neusch=C3=A4fer wrote: > > =20 > > > On Tue, Jun 30, 2020 at 08:40:51AM +0200, Andreas Kemnade wrote: > > > [...] =20 > > > > got a chance to test it on a Tolino Shine 2 HD. > > > > It uses the RTC from the RC5T619 but backlight seems to go via MSP4= 30 > > > > EC. > > > >=20 > > > > I got this. > > > >=20 > > > > [ 1.453603] ntxec 0-0043: Netronix embedded controller version f= 110 detected. > > > > [ 10.723638] ntxec-rtc 21a0000.i2c:embedded-controller@43:rtc: re= gistered as rtc0 > > > > [ 10.775276] ntxec-pwm: probe of 21a0000.i2c:embedded-controller@= 43:pwm failed with error -5 =20 > > >=20 > > > Hmm, -EIO from the PWM driver. > > > =20 > > turing debugging on: =20 >=20 > (edited for compactness:) > > [ 330.332971] i2c i2c-0: write slave address: addr=3D0x86 ACK receiv= ed > > [ 330.334420] i2c i2c-0: write byte: B0=3D0xA3 ACK receiv= ed > > [ 330.334790] i2c i2c-0: write byte: B1=3D0x0 No ACK =20 >=20 > > [ 330.352339] i2c i2c-0: write slave address: addr=3D0x86 ACK receiv= ed > > [ 330.362208] i2c i2c-0: write byte: B0=3D0xA1 ACK receiv= ed > > [ 330.362479] i2c i2c-0: write byte: B1=3D0xFF No ACK =20 >=20 > > [ 330.363112] i2c i2c-0: write slave address: addr=3D0x86 ACK receiv= ed > > [ 330.363362] i2c i2c-0: write byte: B0=3D0xA2 ACK receiv= ed > > [ 330.363608] i2c i2c-0: write byte: B1=3D0xFF No ACK =20 >=20 > Hmm, it doesn't ack the writes to 0xA3, 0xA1 and 0xA2, which should > disable the PWM output and then disable the auto-off timer (according to > the vendor kernel). >=20 > And you said in your other mail that you can actually toggle the light > with writes to 0xA3, so I suspect a bug in the EC firmware here (which > may have gone unnoticed because the vendor kernel doesn't check if the > i2c transfers succeed). :/ >=20 That is a also my theory. > IMHO we should get this driver merged first, and perhaps add a quirk to > deal with the missing ACKs later (unless a better solution is found). >=20 Yes, that can be done separately (after the Tolino Shine 2 HD dtb is in, I am polishing it right now). Regards, Andreas 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 X-Spam-Level: X-Spam-Status: No, score=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_2 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2AA88C433E0 for ; Mon, 6 Jul 2020 19:29:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0A739206B6 for ; Mon, 6 Jul 2020 19:29:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kemnade.info header.i=@kemnade.info header.b="k03cFx+8" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725982AbgGFT3X (ORCPT ); Mon, 6 Jul 2020 15:29:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45892 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725892AbgGFT3X (ORCPT ); Mon, 6 Jul 2020 15:29:23 -0400 Received: from mail.andi.de1.cc (mail.andi.de1.cc [IPv6:2a01:238:4321:8900:456f:ecd6:43e:202c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C79AFC061755; Mon, 6 Jul 2020 12:29:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=kemnade.info; s=20180802; h=Content-Transfer-Encoding:Content-Type: MIME-Version:References:In-Reply-To:Message-ID:Subject:Cc:To:From:Date:Sender :Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=J+EsQQs1HUBrfOSzhNecD2M81XWwzO+HyRXgroFAxgk=; b=k03cFx+8mx+FJD/tl2s7IMVwiy iNCJlj5ygc2kLSa91DasQzKXl8lSP7IFL+573UsRp13GRB1X0muGUbK5ZvzGrH3uO/yFRzvWTFyXN 1ryu+HMVt2tDCXop+i5hPiKFmoHQ2Dk3BHCemJqW7R7IKvGaRrKu1nCh8raJcYNokvW4=; Received: from p200300ccff0e48001a3da2fffebfd33a.dip0.t-ipconnect.de ([2003:cc:ff0e:4800:1a3d:a2ff:febf:d33a] helo=aktux) by mail.andi.de1.cc with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1jsWnN-0003Yy-Tw; Mon, 06 Jul 2020 21:28:54 +0200 Date: Mon, 6 Jul 2020 21:28:48 +0200 From: Andreas Kemnade To: Jonathan =?UTF-8?B?TmV1c2Now6RmZXI=?= Cc: linux-kernel@vger.kernel.org, Lee Jones , Rob Herring , Thierry Reding , Uwe =?UTF-8?B?S2xlaW5lLUvDtm5pZw==?= , Alessandro Zummo , Alexandre Belloni , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , Sam Ravnborg , Linus Walleij , Heiko Stuebner , Stephan Gerhold , Lubomir Rintel , Mark Brown , allen , Mauro Carvalho Chehab , "David S. Miller" , devicetree@vger.kernel.org, linux-pwm@vger.kernel.org, linux-rtc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Heiko Stuebner , Josua Mayer Subject: Re: [RFC PATCH 00/10] Netronix embedded controller driver for Kobo and Tolino ebook readers Message-ID: <20200706212848.7e19886b@aktux> In-Reply-To: <20200704205808.GD2578@latitude> References: <20200620223915.1311485-1-j.neuschaefer@gmx.net> <20200630084051.66feadea@aktux> <20200630071523.GA2983@latitude> <20200630221447.3e03ae28@aktux> <20200704205808.GD2578@latitude> X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Sender: linux-rtc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rtc@vger.kernel.org On Sat, 4 Jul 2020 22:58:08 +0200 Jonathan Neusch=C3=A4fer wrote: > On Tue, Jun 30, 2020 at 10:14:47PM +0200, Andreas Kemnade wrote: > > On Tue, 30 Jun 2020 09:15:23 +0200 > > Jonathan Neusch=C3=A4fer wrote: > > =20 > > > On Tue, Jun 30, 2020 at 08:40:51AM +0200, Andreas Kemnade wrote: > > > [...] =20 > > > > got a chance to test it on a Tolino Shine 2 HD. > > > > It uses the RTC from the RC5T619 but backlight seems to go via MSP4= 30 > > > > EC. > > > >=20 > > > > I got this. > > > >=20 > > > > [ 1.453603] ntxec 0-0043: Netronix embedded controller version f= 110 detected. > > > > [ 10.723638] ntxec-rtc 21a0000.i2c:embedded-controller@43:rtc: re= gistered as rtc0 > > > > [ 10.775276] ntxec-pwm: probe of 21a0000.i2c:embedded-controller@= 43:pwm failed with error -5 =20 > > >=20 > > > Hmm, -EIO from the PWM driver. > > > =20 > > turing debugging on: =20 >=20 > (edited for compactness:) > > [ 330.332971] i2c i2c-0: write slave address: addr=3D0x86 ACK receiv= ed > > [ 330.334420] i2c i2c-0: write byte: B0=3D0xA3 ACK receiv= ed > > [ 330.334790] i2c i2c-0: write byte: B1=3D0x0 No ACK =20 >=20 > > [ 330.352339] i2c i2c-0: write slave address: addr=3D0x86 ACK receiv= ed > > [ 330.362208] i2c i2c-0: write byte: B0=3D0xA1 ACK receiv= ed > > [ 330.362479] i2c i2c-0: write byte: B1=3D0xFF No ACK =20 >=20 > > [ 330.363112] i2c i2c-0: write slave address: addr=3D0x86 ACK receiv= ed > > [ 330.363362] i2c i2c-0: write byte: B0=3D0xA2 ACK receiv= ed > > [ 330.363608] i2c i2c-0: write byte: B1=3D0xFF No ACK =20 >=20 > Hmm, it doesn't ack the writes to 0xA3, 0xA1 and 0xA2, which should > disable the PWM output and then disable the auto-off timer (according to > the vendor kernel). >=20 > And you said in your other mail that you can actually toggle the light > with writes to 0xA3, so I suspect a bug in the EC firmware here (which > may have gone unnoticed because the vendor kernel doesn't check if the > i2c transfers succeed). :/ >=20 That is a also my theory. > IMHO we should get this driver merged first, and perhaps add a quirk to > deal with the missing ACKs later (unless a better solution is found). >=20 Yes, that can be done separately (after the Tolino Shine 2 HD dtb is in, I am polishing it right now). 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Miller" Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gU2F0LCA0IEp1bCAyMDIwIDIyOjU4OjA4ICswMjAwCkpvbmF0aGFuIE5ldXNjaMOkZmVyIDxq Lm5ldXNjaGFlZmVyQGdteC5uZXQ+IHdyb3RlOgoKPiBPbiBUdWUsIEp1biAzMCwgMjAyMCBhdCAx MDoxNDo0N1BNICswMjAwLCBBbmRyZWFzIEtlbW5hZGUgd3JvdGU6Cj4gPiBPbiBUdWUsIDMwIEp1 biAyMDIwIDA5OjE1OjIzICswMjAwCj4gPiBKb25hdGhhbiBOZXVzY2jDpGZlciA8ai5uZXVzY2hh ZWZlckBnbXgubmV0PiB3cm90ZToKPiA+ICAgCj4gPiA+IE9uIFR1ZSwgSnVuIDMwLCAyMDIwIGF0 IDA4OjQwOjUxQU0gKzAyMDAsIEFuZHJlYXMgS2VtbmFkZSB3cm90ZToKPiA+ID4gWy4uLl0gIAo+ ID4gPiA+IGdvdCBhIGNoYW5jZSB0byB0ZXN0IGl0IG9uIGEgVG9saW5vIFNoaW5lIDIgSEQuCj4g PiA+ID4gSXQgdXNlcyB0aGUgUlRDIGZyb20gdGhlIFJDNVQ2MTkgYnV0IGJhY2tsaWdodCBzZWVt cyB0byBnbyB2aWEgTVNQNDMwCj4gPiA+ID4gRUMuCj4gPiA+ID4gCj4gPiA+ID4gSSBnb3QgdGhp cy4KPiA+ID4gPiAKPiA+ID4gPiBbICAgIDEuNDUzNjAzXSBudHhlYyAwLTAwNDM6IE5ldHJvbml4 IGVtYmVkZGVkIGNvbnRyb2xsZXIgdmVyc2lvbiBmMTEwIGRldGVjdGVkLgo+ID4gPiA+IFsgICAx MC43MjM2MzhdIG50eGVjLXJ0YyAyMWEwMDAwLmkyYzplbWJlZGRlZC1jb250cm9sbGVyQDQzOnJ0 YzogcmVnaXN0ZXJlZCBhcyBydGMwCj4gPiA+ID4gWyAgIDEwLjc3NTI3Nl0gbnR4ZWMtcHdtOiBw cm9iZSBvZiAyMWEwMDAwLmkyYzplbWJlZGRlZC1jb250cm9sbGVyQDQzOnB3bSBmYWlsZWQgd2l0 aCBlcnJvciAtNSAgICAKPiA+ID4gCj4gPiA+IEhtbSwgLUVJTyBmcm9tIHRoZSBQV00gZHJpdmVy Lgo+ID4gPiAgIAo+ID4gdHVyaW5nIGRlYnVnZ2luZyBvbjogIAo+IAo+IChlZGl0ZWQgZm9yIGNv bXBhY3RuZXNzOikKPiA+IFsgIDMzMC4zMzI5NzFdIGkyYyBpMmMtMDogd3JpdGUgc2xhdmUgYWRk cmVzczogYWRkcj0weDg2ICAgQUNLIHJlY2VpdmVkCj4gPiBbICAzMzAuMzM0NDIwXSBpMmMgaTJj LTA6IHdyaXRlIGJ5dGU6IEIwPTB4QTMgICAgICAgICAgICAgIEFDSyByZWNlaXZlZAo+ID4gWyAg MzMwLjMzNDc5MF0gaTJjIGkyYy0wOiB3cml0ZSBieXRlOiBCMT0weDAgICAgICAgICAgICAgICBO byBBQ0sgIAo+IAo+ID4gWyAgMzMwLjM1MjMzOV0gaTJjIGkyYy0wOiB3cml0ZSBzbGF2ZSBhZGRy ZXNzOiBhZGRyPTB4ODYgICBBQ0sgcmVjZWl2ZWQKPiA+IFsgIDMzMC4zNjIyMDhdIGkyYyBpMmMt MDogd3JpdGUgYnl0ZTogQjA9MHhBMSAgICAgICAgICAgICAgQUNLIHJlY2VpdmVkCj4gPiBbICAz MzAuMzYyNDc5XSBpMmMgaTJjLTA6IHdyaXRlIGJ5dGU6IEIxPTB4RkYgICAgICAgICAgICAgIE5v IEFDSyAgCj4gCj4gPiBbICAzMzAuMzYzMTEyXSBpMmMgaTJjLTA6IHdyaXRlIHNsYXZlIGFkZHJl c3M6IGFkZHI9MHg4NiAgIEFDSyByZWNlaXZlZAo+ID4gWyAgMzMwLjM2MzM2Ml0gaTJjIGkyYy0w OiB3cml0ZSBieXRlOiBCMD0weEEyICAgICAgICAgICAgICBBQ0sgcmVjZWl2ZWQKPiA+IFsgIDMz MC4zNjM2MDhdIGkyYyBpMmMtMDogd3JpdGUgYnl0ZTogQjE9MHhGRiAgICAgICAgICAgICAgTm8g QUNLICAKPiAKPiBIbW0sIGl0IGRvZXNuJ3QgYWNrIHRoZSB3cml0ZXMgdG8gMHhBMywgMHhBMSBh bmQgMHhBMiwgd2hpY2ggc2hvdWxkCj4gZGlzYWJsZSB0aGUgUFdNIG91dHB1dCBhbmQgdGhlbiBk aXNhYmxlIHRoZSBhdXRvLW9mZiB0aW1lciAoYWNjb3JkaW5nIHRvCj4gdGhlIHZlbmRvciBrZXJu ZWwpLgo+IAo+IEFuZCB5b3Ugc2FpZCBpbiB5b3VyIG90aGVyIG1haWwgdGhhdCB5b3UgY2FuIGFj dHVhbGx5IHRvZ2dsZSB0aGUgbGlnaHQKPiB3aXRoIHdyaXRlcyB0byAweEEzLCBzbyBJIHN1c3Bl Y3QgYSBidWcgaW4gdGhlIEVDIGZpcm13YXJlIGhlcmUgKHdoaWNoCj4gbWF5IGhhdmUgZ29uZSB1 bm5vdGljZWQgYmVjYXVzZSB0aGUgdmVuZG9yIGtlcm5lbCBkb2Vzbid0IGNoZWNrIGlmIHRoZQo+ IGkyYyB0cmFuc2ZlcnMgc3VjY2VlZCkuIDovCj4gClRoYXQgaXMgYSBhbHNvIG15IHRoZW9yeS4K Cj4gSU1ITyB3ZSBzaG91bGQgZ2V0IHRoaXMgZHJpdmVyIG1lcmdlZCBmaXJzdCwgYW5kIHBlcmhh cHMgYWRkIGEgcXVpcmsgdG8KPiBkZWFsIHdpdGggdGhlIG1pc3NpbmcgQUNLcyBsYXRlciAodW5s ZXNzIGEgYmV0dGVyIHNvbHV0aW9uIGlzIGZvdW5kKS4KPiAKWWVzLCB0aGF0IGNhbiBiZSBkb25l IHNlcGFyYXRlbHkgKGFmdGVyIHRoZSBUb2xpbm8gU2hpbmUgMiBIRCBkdGIgaXMKaW4sIEkgYW0g cG9saXNoaW5nIGl0IHJpZ2h0IG5vdykuCgpSZWdhcmRzLApBbmRyZWFzCgpfX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1hcm0ta2VybmVsIG1haWxp bmcgbGlzdApsaW51eC1hcm0ta2VybmVsQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3Rz LmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1hcm0ta2VybmVsCg==