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Miller" , Jakub Kicinski , Ansuel Smith , Andrew Lunn , Florian Fainelli , Hauke Mehrtens , =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= Subject: [PATCH 0/2] dt-bindings: nvmem: support describing cells Date: Tue, 25 Jan 2022 19:01:12 +0100 Message-Id: <20220125180114.12286-1-zajec5@gmail.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220125_100122_993579_532AA035 X-CRM114-Status: GOOD ( 13.18 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org RnJvbTogUmFmYcWCIE1pxYJlY2tpIDxyYWZhbEBtaWxlY2tpLnBsPgoKTWljaGFlbCBoYXMgcmVj ZW50bHkgcG9zdGVkIGEgY2xlYW5lZCB1cCBwYXRjaHNldCBmb3IgTlZNRU0KdHJhbnNmb3JtYXRp b25zIHN1cHBvcnQ6CltQQVRDSCAwLzhdIG52bWVtOiBhZGQgZXRoZXJuZXQgYWRkcmVzcyBvZmZz ZXQgc3VwcG9ydApodHRwczovL2xvcmUua2VybmVsLm9yZy9sa21sLzIwMjExMjI4MTQyNTQ5LjEy NzU0MTItMS1taWNoYWVsQHdhbGxlLmNjL1QvCmh0dHBzOi8vcGF0Y2h3b3JrLm96bGFicy5vcmcv cHJvamVjdC9saW51eC1tdGQvbGlzdC8/c2VyaWVzPTI3ODY0NCZzdGF0ZT0qCgpJIGZpbmQgaXQg dmVyeSBpbXBvcnRhbnQgJiBmdWxseSBzdXBwb3J0IGl0LiBJbiBob21lIHJvdXRlcnMgd2UgdmVy eQpvZnRlbiBkZWFsIHdpdGgganVzdCBvbmUgTUFDIGFkZHJlc3MgdGhhdDoKMS4gSXMgYSBiYXNl IGZvciBjYWxjdWxhdGluZyBtdWx0aXBsZSBFdGhlcm5ldCBhZGRyZXNzZXMKMi4gQ2FuIGJlIHN0 b3JlZCBpbiBiaW5hcnkgYXMgd2VsbCBhcyBBU0NJSSBmb3JtYXQKCkknZCBsaWtlIHRvIHN1Z2dl c3QganVzdCBhIHNsaWdodGx5IGRpZmZlcmVudCBzb2x1dGlvbiB0aG91Z2guIEkgdGhpbmsKdGhh dCB1c2luZyBzb21ldGhpbmcgbGlrZToKCm90cC0xIHsKICAgICAgICBjb21wYXRpYmxlID0gImtv bnRyb24sc2wyOC12cGQiLCAidXNlci1vdHAiOwogICAgICAgICNhZGRyZXNzLWNlbGxzID0gPDE+ OwogICAgICAgICNzaXplLWNlbGxzID0gPDE+OwoKICAgICAgICBiYXNlX21hY19hZGRyZXNzOiBi YXNlLW1hYy1hZGRyZXNzQDE3IHsKICAgICAgICAgICAgICAgICNudm1lbS1jZWxsLWNlbGxzID0g PDE+OwogICAgICAgICAgICAgICAgcmVnID0gPDE3IDY+OwogICAgICAgIH07Cn07Cgppc24ndCBj bGVhciBlbm91Z2ggYW5kIHJlcXVpcmVzIHRvbyBtdWNoIGNvbmRpdGlvbmFsIGNvZGUgaW4gTGlu dXggLwp3aGF0ZXZlciBpbXBsZW1lbnRhdGlvbi4gRFQgZG9lc24ndCBtYWtlIGl0IGNsZWFyIHdo aWNoIE5WTUVNIGNlbGxzCmFyZSB1c2VkIGZvciB3aGF0IGFuZCBob3cgc2hvdWxkIGJlIGhhbmRs ZWQuIFRoYXQgaGFzIHRvIGJlIGhhcmRjb2RlZCBpbgphIExpbnV4IC8gd2hhdGV2ZXIgZHJpdmVy LgoKTXkgaWRlYSBpcyB0byBhZGQgImNvbXBhdGlibGUiICYgYWRkaXRpb25hbCBmbGFncyB0byBO Vk1FTSBjZWxscy4KRXhhbXBsZToKCm90cC0xIHsKICAgICAgICBjb21wYXRpYmxlID0gInVzZXIt b3RwIjsKICAgICAgICAjYWRkcmVzcy1jZWxscyA9IDwxPjsKICAgICAgICAjc2l6ZS1jZWxscyA9 IDwxPjsKCiAgICAgICAgYmFzZV9tYWNfYWRkcmVzczogYmFzZS1tYWMtYWRkcmVzc0AxNyB7CiAg ICAgICAgICAgICAgICBjb21wYXRpYmxlID0gIm1hYy1hZGRyZXNzIjsKICAgICAgICAgICAgICAg IHJlZyA9IDwxNyA2PjsKICAgICAgICAgICAgICAgICNudm1lbS1jZWxsLWNlbGxzID0gPDE+Owog ICAgICAgIH07Cn07CgooZm9yIG1vcmUgZXhhbXBsZXMgc2VlIFBBVENIIDIvMiBhbmQgaXRzIG1h Yy1hZGRyZXNzLnlhbWwgLgoKUmFmYcWCIE1pxYJlY2tpICgyKToKICBkdC1iaW5kaW5nczogbnZt ZW06IGV4dHJhY3QgTlZNRU0gY2VsbCB0byBzZXBhcmF0ZWQgZmlsZQogIGR0LWJpbmRpbmdzOiBu dm1lbTogY2VsbHM6IGFkZCBNQUMgYWRkcmVzcyBjZWxsCgogLi4uL2RldmljZXRyZWUvYmluZGlu Z3MvbnZtZW0vY2VsbHMvY2VsbC55YW1sIHwgMzUgKysrKysrKwogLi4uL2JpbmRpbmdzL252bWVt L2NlbGxzL21hYy1hZGRyZXNzLnlhbWwgICAgIHwgOTQgKysrKysrKysrKysrKysrKysrKwogLi4u L2RldmljZXRyZWUvYmluZGluZ3MvbnZtZW0vbnZtZW0ueWFtbCAgICAgIHwgMjUgKy0tLS0KIDMg ZmlsZXMgY2hhbmdlZCwgMTMxIGluc2VydGlvbnMoKyksIDIzIGRlbGV0aW9ucygtKQogY3JlYXRl IG1vZGUgMTAwNjQ0IERvY3VtZW50YXRpb24vZGV2aWNldHJlZS9iaW5kaW5ncy9udm1lbS9jZWxs cy9jZWxsLnlhbWwKIGNyZWF0ZSBtb2RlIDEwMDY0NCBEb2N1bWVudGF0aW9uL2RldmljZXRyZWUv YmluZGluZ3MvbnZtZW0vY2VsbHMvbWFjLWFkZHJlc3MueWFtbAoKLS0gCjIuMzEuMQoKCl9fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpMaW51eCBN VEQgZGlzY3Vzc2lvbiBtYWlsaW5nIGxpc3QKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFp bG1hbi9saXN0aW5mby9saW51eC1tdGQvCg== 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 08150C433EF for ; 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[194.187.74.233]) by smtp.gmail.com with ESMTPSA id z24sm1149121lfb.206.2022.01.25.10.01.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Jan 2022 10:01:19 -0800 (PST) From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= To: Rob Herring , Srinivas Kandagatla , Michael Walle Cc: linux-mtd@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org, Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Shawn Guo , Li Yang , Frank Rowand , "David S . Miller" , Jakub Kicinski , Ansuel Smith , Andrew Lunn , Florian Fainelli , Hauke Mehrtens , =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= Subject: [PATCH 0/2] dt-bindings: nvmem: support describing cells Date: Tue, 25 Jan 2022 19:01:12 +0100 Message-Id: <20220125180114.12286-1-zajec5@gmail.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Rafał Miłecki Michael has recently posted a cleaned up patchset for NVMEM transformations support: [PATCH 0/8] nvmem: add ethernet address offset support https://lore.kernel.org/lkml/20211228142549.1275412-1-michael@walle.cc/T/ https://patchwork.ozlabs.org/project/linux-mtd/list/?series=278644&state=* I find it very important & fully support it. In home routers we very often deal with just one MAC address that: 1. Is a base for calculating multiple Ethernet addresses 2. Can be stored in binary as well as ASCII format I'd like to suggest just a slightly different solution though. I think that using something like: otp-1 { compatible = "kontron,sl28-vpd", "user-otp"; #address-cells = <1>; #size-cells = <1>; base_mac_address: base-mac-address@17 { #nvmem-cell-cells = <1>; reg = <17 6>; }; }; isn't clear enough and requires too much conditional code in Linux / whatever implementation. DT doesn't make it clear which NVMEM cells are used for what and how should be handled. That has to be hardcoded in a Linux / whatever driver. My idea is to add "compatible" & additional flags to NVMEM cells. Example: otp-1 { compatible = "user-otp"; #address-cells = <1>; #size-cells = <1>; base_mac_address: base-mac-address@17 { compatible = "mac-address"; reg = <17 6>; #nvmem-cell-cells = <1>; }; }; (for more examples see PATCH 2/2 and its mac-address.yaml . Rafał Miłecki (2): dt-bindings: nvmem: extract NVMEM cell to separated file dt-bindings: nvmem: cells: add MAC address cell .../devicetree/bindings/nvmem/cells/cell.yaml | 35 +++++++ .../bindings/nvmem/cells/mac-address.yaml | 94 +++++++++++++++++++ .../devicetree/bindings/nvmem/nvmem.yaml | 25 +---- 3 files changed, 131 insertions(+), 23 deletions(-) create mode 100644 Documentation/devicetree/bindings/nvmem/cells/cell.yaml create mode 100644 Documentation/devicetree/bindings/nvmem/cells/mac-address.yaml -- 2.31.1