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[89.77.68.124]) by smtp.gmail.com with ESMTPSA id b13sm1619353lfv.200.2021.11.16.03.08.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 16 Nov 2021 03:08:02 -0800 (PST) Message-ID: <202f0fd8-1208-b17d-5ee5-e776e45cb065@canonical.com> Date: Tue, 16 Nov 2021 12:08:01 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.2.1 Subject: Re: [PATCH] riscv: dts: sifive unmatched: Expose the FU740 core supply regulator. Content-Language: en-US To: =?UTF-8?Q?Heiko_St=c3=bcbner?= , Rob Herring , Paul Walmsley , Palmer Dabbelt , Albert Ou , Qiu Wenbo , Yash Shah , devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, David Abdurachmanov Cc: Vincent Pelletier References: <0879c5b0c72b9bf6bf71f880def166f8804f41c7.1637023980.git.plr.vincent@gmail.com> <2266648.AD6qrfpaa2@diego> From: Krzysztof Kozlowski In-Reply-To: <2266648.AD6qrfpaa2@diego> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211116_030807_476830_C8431A00 X-CRM114-Status: GOOD ( 24.72 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org T24gMTYvMTEvMjAyMSAxMDo1MywgSGVpa28gU3TDvGJuZXIgd3JvdGU6Cj4gSGkgVmluY2VudCwK PiAKPiBBbSBEaWVuc3RhZywgMTYuIE5vdmVtYmVyIDIwMjEsIDAxOjUyOjU5IENFVCBzY2hyaWVi IFZpbmNlbnQgUGVsbGV0aWVyOgo+PiBQcm92aWRlcyBtb25pdG9yaW5nIG9mIGNvcmUgdm9sdGFn ZSBhbmQgY3VycmVudDoKPj4gdHBzNTQ0YjIwLWkyYy0wLTFlCj4+IEFkYXB0ZXI6IGkyYy1vY29y ZXMKPj4gdm91dDE6ICAgICAgIDkwNi4wMCBtVgo+PiB0ZW1wMTogICAgICAgIC00MC4wwrBDICAo aGlnaCA9ICsxMjUuMMKwQywgY3JpdCA9ICsxNTAuMMKwQykKPj4gaW91dDE6ICAgICAgICAgNS4w NiBBICAobWF4ID0gKzIwLjAwIEEsIGNyaXQgbWF4ID0gKzI2LjAwIEEpCj4+Cj4+IFNpZ25lZC1v ZmYtYnk6IFZpbmNlbnQgUGVsbGV0aWVyIDxwbHIudmluY2VudEBnbWFpbC5jb20+Cj4+Cj4+IC0t Cj4+IE5vdGUgZm9yIHJldmlldzogdGhpcyBwYXRjaCBoYXMgb25lIHdhcm5pbmcgZnJvbSBjaGVj a3BhdGNoLnBsOgo+PiAgIFdBUk5JTkc6IERUIGNvbXBhdGlibGUgc3RyaW5nICJ0cHM1NDRiMjAi IGFwcGVhcnMgdW4tZG9jdW1lbnRlZCAtLSBjaGVjayAuL0RvY3VtZW50YXRpb24vZGV2aWNldHJl ZS9iaW5kaW5ncy8KPj4gICAjMzI6IEZJTEU6IGFyY2gvcmlzY3YvYm9vdC9kdHMvc2lmaXZlL2hp Zml2ZS11bm1hdGNoZWQtYTAwLmR0czo1NToKPj4gICArICAgICAgICAgICAgICAgY29tcGF0aWJs ZSA9ICJ0cHM1NDRiMjAiOwo+PiBUaGlzIGNoaXAgaXMgaGFuZGxlZCBieSB0aGUgZXhpc3Rpbmcg cG1idXMgbW9kdWxlLCBhbmQgdGhlcmUgaXMgaW5kZWVkIG5vCj4+IG1hdGNoaW5nIGVudHJ5IGlu IERvY3VtZW50YXRpb24vZGV2aWNldHJlZS9iaW5kaW5ncy9od21vbi9wbWJ1cy4gSSBhbSBub3QK Pj4gZXNwZWNpYWxseSBrbm93bGVkZ2VhYmxlIGFib3V0IHRoaXMgY2hpcCwgSSBvbmx5IGtub3cg aXQgaXMgdXNlZCBieSB0aGlzCj4+IGJvYXJkLCBzbyBJIGFtIG5vdCBzdXJlIEkgY2FuIGRvIHRo ZSBiZXN0IGpvYiBpbiBwdXR0aW5nIHN1Y2ggYSBmaWxlCj4+IHRvZ2V0aGVyLgo+PiBJZiBuZWVk ZWQgSSBjYW4gZ2l0IGl0IGEgdHJ5Lgo+IAo+IERldmljZXRyZWUgYmluZGluZ3MgYXJlIHN1cHBv c2VkIHRvIGJlIHN0YWJsZSBpbnRvIHRoZSBmdXR1cmUsIHNvIGFuIGFjdHVhbGx5Cj4gcmV2aWV3 ZWQgYmluZGluZyBpcyBxdWl0ZSBuZWNlc3NhcnkgOy0pIC4KPiAKPiBJbiB0aGUgY2FzZSBvZiB5 b3VyIHRwczU0NGIyMCBpdCBzaG91bGQgYWxzbyBiZSBwcmV0dHkgZWFzeSB0byBkbywgYXMKPiAK PiAJRG9jdW1lbnRhdGlvbi9kZXZpY2V0cmVlL2JpbmRpbmdzL2h3bW9uL3BtYnVzL3RpLHVjZDkw MzIwLnlhbWwKPiAKPiBpcyBwcm9iYWJseSBhIHByZXR0eSBnb29kIG1hdGNoIHRvIHdoYXQgeW91 IG5lZWQgaW4gdGVybXMgb2YgWWFtbCBub3RhdGlvbi4KPiBKdXN0IG5lZWQgdG8gcmVwbGFjZSB0 aGUgbmFtaW5nIGluIHlvdXIgY29weSBhbmQgZHJvcCBpbiB0aGUgY29ycmVjdAo+IGRlc2NyaXB0 aW9uIGZyb20KPiAKPiAJaHR0cHM6Ly93d3cudGkuY29tL2xpdC9kcy9zeW1saW5rL3RwczU0NGIy MC5wZGY/dHM9MTYzNzA1NTc4MDI3OAo+IAo+IGFuZCB5b3UgaGF2ZSBhIHdvcmtpbmcgYmluZGlu Zy4KPiAKPiBUaGVuIGp1c3QgYWRkIGFub3RoZXIgcGF0Y2ggdG8geW91ciBzZXJpZXMgdGhhdCBt aW1pY3MKPiAKPiAJaHR0cHM6Ly9naXQua2VybmVsLm9yZy9wdWIvc2NtL2xpbnV4L2tlcm5lbC9n aXQvdG9ydmFsZHMvbGludXguZ2l0L2NvbW1pdC8/aWQ9OGEzNmUzOGQ4YjBmYmI5MjYwOWU4Mzdh NjdmOTE5MjAyZWM3ZWM1MQo+IAo+IGFuZCBpbmNsdWRlIHRoZSByZWxldmFudCBtYWludGFpbmVy cyB0aGF0IHNjcmlwdHMvZ2V0X21haW50YWluZXIucGwgd2lsbAo+IGdpdmUgeW91LCBhbmQgeW91 J3JlIGFsbCBzZXQgOi0pCj4gCgpIaSBIZWlrbywKCkluIGN1cnJlbnQgZm9ybSB0aGUgYmluZGlu Z3Mgd291bGQgYmUgY2xvc2UgdG8gdHJpdmlhbCBhbmQgd2UgYWN0dWFsbHkKZG8gbm90IGtub3cg aG93IHByb3BlciBiaW5kaW5ncyB3b3VsZCBsb29rIGxpa2UgKHRoZSBkZXZpY2UgaXMgbm90CnRy aXZpYWwpLiBUaGVyZWZvcmUgYmFzZWQgb24gUm9iJ3MgcmVjZW50IGNvbW1lbnRzIC0gYmV0dGVy IHRvIGhhdmUKdHJpdmlhbCBzY2hlbWEgdGhhbiBub3RoaW5nIC0gSSBzZW50IGEgcGF0Y2ggYWRk aW5nIHRoZW0gdG8gdHJpdmlhbC1kZXZpY2VzOgoKaHR0cHM6Ly9sb3JlLmtlcm5lbC5vcmcvbGlu dXgtZGV2aWNldHJlZS8yMDIxMTExNjExMDIwNy42ODQ5NC0xLWtyenlzenRvZi5rb3psb3dza2lA Y2Fub25pY2FsLmNvbS9ULyN1CgoKQmVzdCByZWdhcmRzLApLcnp5c3p0b2YKCl9fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4LXJpc2N2IG1haWxpbmcg bGlzdApsaW51eC1yaXNjdkBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRl YWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtcmlzY3YK 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B766CC433F5 for ; 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[89.77.68.124]) by smtp.gmail.com with ESMTPSA id b13sm1619353lfv.200.2021.11.16.03.08.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 16 Nov 2021 03:08:02 -0800 (PST) Message-ID: <202f0fd8-1208-b17d-5ee5-e776e45cb065@canonical.com> Date: Tue, 16 Nov 2021 12:08:01 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.2.1 Subject: Re: [PATCH] riscv: dts: sifive unmatched: Expose the FU740 core supply regulator. Content-Language: en-US To: =?UTF-8?Q?Heiko_St=c3=bcbner?= , Rob Herring , Paul Walmsley , Palmer Dabbelt , Albert Ou , Qiu Wenbo , Yash Shah , devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, David Abdurachmanov Cc: Vincent Pelletier References: <0879c5b0c72b9bf6bf71f880def166f8804f41c7.1637023980.git.plr.vincent@gmail.com> <2266648.AD6qrfpaa2@diego> From: Krzysztof Kozlowski In-Reply-To: <2266648.AD6qrfpaa2@diego> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On 16/11/2021 10:53, Heiko Stübner wrote: > Hi Vincent, > > Am Dienstag, 16. November 2021, 01:52:59 CET schrieb Vincent Pelletier: >> Provides monitoring of core voltage and current: >> tps544b20-i2c-0-1e >> Adapter: i2c-ocores >> vout1: 906.00 mV >> temp1: -40.0°C (high = +125.0°C, crit = +150.0°C) >> iout1: 5.06 A (max = +20.00 A, crit max = +26.00 A) >> >> Signed-off-by: Vincent Pelletier >> >> -- >> Note for review: this patch has one warning from checkpatch.pl: >> WARNING: DT compatible string "tps544b20" appears un-documented -- check ./Documentation/devicetree/bindings/ >> #32: FILE: arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts:55: >> + compatible = "tps544b20"; >> This chip is handled by the existing pmbus module, and there is indeed no >> matching entry in Documentation/devicetree/bindings/hwmon/pmbus. I am not >> especially knowledgeable about this chip, I only know it is used by this >> board, so I am not sure I can do the best job in putting such a file >> together. >> If needed I can git it a try. > > Devicetree bindings are supposed to be stable into the future, so an actually > reviewed binding is quite necessary ;-) . > > In the case of your tps544b20 it should also be pretty easy to do, as > > Documentation/devicetree/bindings/hwmon/pmbus/ti,ucd90320.yaml > > is probably a pretty good match to what you need in terms of Yaml notation. > Just need to replace the naming in your copy and drop in the correct > description from > > https://www.ti.com/lit/ds/symlink/tps544b20.pdf?ts=1637055780278 > > and you have a working binding. > > Then just add another patch to your series that mimics > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8a36e38d8b0fbb92609e837a67f919202ec7ec51 > > and include the relevant maintainers that scripts/get_maintainer.pl will > give you, and you're all set :-) > Hi Heiko, In current form the bindings would be close to trivial and we actually do not know how proper bindings would look like (the device is not trivial). Therefore based on Rob's recent comments - better to have trivial schema than nothing - I sent a patch adding them to trivial-devices: https://lore.kernel.org/linux-devicetree/20211116110207.68494-1-krzysztof.kozlowski@canonical.com/T/#u Best regards, Krzysztof