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Thu, 28 Mar 2024 10:00:24 -0700 (PDT) Received: from [192.168.1.63] ([109.28.199.236]) by smtp.gmail.com with ESMTPSA id p14-20020a05640210ce00b0056c4f8130c3sm1047007edu.82.2024.03.28.10.00.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Mar 2024 10:00:23 -0700 (PDT) Message-ID: <871f0b24a38208d9c5d6abc87d83b067162c103e.camel@gmail.com> Subject: Re: [PATCH 1/3] phy: rockchip: emmc: Enable pulldown for strobe line From: Alban Browaeys To: Conor Dooley , dev@folker-schwesinger.de Cc: Vinod Koul , Kishon Vijay Abraham I , Heiko Stuebner , Chris Ruehl , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Christopher Obbard , Doug Anderson , Brian Norris , Jensen Huang , linux-phy@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Date: Thu, 28 Mar 2024 18:00:03 +0100 In-Reply-To: <20240326-tactical-onlooker-3df8d2352dc2@spud> References: <20240326-rk-default-enable-strobe-pulldown-v1-0-f410c71605c0@folker-schwesinger.de> <20240326-rk-default-enable-strobe-pulldown-v1-1-f410c71605c0@folker-schwesinger.de> <20240326-tactical-onlooker-3df8d2352dc2@spud> Autocrypt: addr=alban.browaeys@gmail.com; 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charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org TGUgbWFyZGkgMjYgbWFycyAyMDI0IMOgIDE5OjQ2ICswMDAwLCBDb25vciBEb29sZXkgYSDDqWNy aXTCoDoKPiBPbiBUdWUsIE1hciAyNiwgMjAyNCBhdCAwNzo1NDozNVBNICswMTAwLCBGb2xrZXIg U2Nod2VzaW5nZXIgdmlhIEI0Cj4gUmVsYXkgd3JvdGU6Cj4gPiBGcm9tOiBGb2xrZXIgU2Nod2Vz aW5nZXIgPGRldkBmb2xrZXItc2Nod2VzaW5nZXIuZGU+Cj4gPiAtCWlmIChvZl9wcm9wZXJ0eV9y ZWFkX2Jvb2woZGV2LT5vZl9ub2RlLCAicm9ja2NoaXAsZW5hYmxlLQo+ID4gc3Ryb2JlLXB1bGxk b3duIikpCj4gPiAtCQlya19waHktPmVuYWJsZV9zdHJvYmVfcHVsbGRvd24gPQo+ID4gUEhZQ1RS TF9SRU5fU1RSQl9FTkFCTEU7Cj4gPiArCWlmIChvZl9wcm9wZXJ0eV9yZWFkX2Jvb2woZGV2LT5v Zl9ub2RlLCAicm9ja2NoaXAsZGlzYWJsZS0KPiA+IHN0cm9iZS1wdWxsZG93biIpKQo+ID4gKwkJ cmtfcGh5LT5lbmFibGVfc3Ryb2JlX3B1bGxkb3duID0KPiA+IFBIWUNUUkxfUkVOX1NUUkJfRElT QUJMRTsKPiAKPiBVbmZvcnR1bmF0ZWx5IHlvdSBjYW5ub3QgZG8gdGhpcy4KPiBQcmV2aW91c2x5 IG5vIHByb3BlcnR5IGF0IGFsbCBtZWFudCBkaXNhYmxlZCBhbmQgYSBwcm9wZXJ0eSB3YXMKPiBy ZXF1aXJlZAo+IHRvIGVuYWJsZSBpdC4gV2l0aCB0aGlzIGNoYW5nZSB0aGUgYWJzZW5jZSBvZiBh IHByb3BlcnR5IG1lYW5zIHRoYXQKPiBpdAo+IHdpbGwgYmUgZW5hYmxlZC4KPiBBbiBvbGQgZGV2 aWNldHJlZSBpcyB0aGF0IHdhbnRlZCB0aGlzIHRvIGJlIGRpc2FibGVkIHdvdWxkIGhhdmUgbm8K PiBwcm9wZXJ0eSBhbmQgd2lsbCBub3cgZW5kIHVwIHdpdGggaXQgZW5hYmxlZC4gVGhpcyBpcyBh biBBQkkgYnJlYWsKPiBhbmQgaXMKPiBjbGVhcmx5IG5vdCBiYWNrd2FyZHMgY29tcGF0aWJsZSwg dGhhdCdzIGEgTkFLIHVubGVzcyBpdCBpcwo+IGRlbW9uc3RyYWJsZQo+IHRoYXQgbm9vbmUgYWN0 dWFsbHkgd2FudHMgdG8gZGlzYWJsZSBpdCBhdCBhbGwuCgoKQnV0IHRoZSBwYXRjaCB0aGF0IGlu dHJvZHVjZWQgdGhlIG5ldyBkZWZhdWx0IHRvIGRpc2FibGUgdGhlIHB1bGxkb3duCmV4cGxpY2l0 ZWx5IGludHJvZHVjZWQgYSByZWdyZXNzaW9uIGZvciBhdCBsZWFzdCA0IGJvYXJkcy4KSXQgdG9v ayB0aW1lIHRvIHNvcnQgb3V0IHRoYXQgdGhlIGRlZmF1bHQgdG8gZGlzYWJsZSBwdWxsZG93biB3 YXMgdGhlCmN1bHByaXQgYnV0IHN0aWxsLgpXaWxsIHdlIGNhcnJ5IHRoaXMgbmV3IGJlaGF2b3Ig dGhhdCBicmVha3MgdGhlIGRlZmF1bHQgZGVzaWduIGZvcgpyazMzOTkgYmVjYXVzZSBzaW5jZSB0 aGUgcmVncmVzc2lvbiB3YXMgaW50cm9kdWNlZCBuZXcgYm9hcmQgZGVmaW5pdGlvbgptaWdodCBo YXZlIGV4cGNldGVkIHRoaXMgbmV3IGJlaGF2aW9yLgoKQ291bGQgdGhlIGJlc3Qgb3B0aW9uIGJl IHRvIHJldmVydCB0byDDqW5vdCBzZXQgYSBkZWZhdWx0IGVuYWJsZS9kaXNhYmxlCnB1bGxkb3du IiAoYXMgYmVmb3JlIHRoZSBjb21taXQgdGhhdCBpbnRyb2R1Y2VkIHRoZSByZWdyZXNzaW9uKSBh bmQKYWxsb3cgb25lIHRvIGZvcmNlIHRoZSBwdWxsZG93biB2aWEgdGhlIGVuYWJsZS9kaXNhYmxl IHB1bGxkb3duCnByb3BlcnR5PwpJIG1lYW4gdGhlIGNvbW1pdCB0aGF0IGludHJvZHVjZWQgYSBk ZWZhdWx0IHZhbHVlIGZvciB0aGUgcHVsbGRvd24gZGlkCm5vdCBzZWVtIHRvIGJlIGFib3V0IGZp eGluZyBhbnl0aGluZy4gQnV0IGl0IGJyb2tlIGEgbG90LiBBTmQgaXQgd2FzCnJlYWxseSByZWFs bHkgaGFyZCB0byBmaW5kIHRoZSBkZXNjcmlwdGlvbiBvZiB0aGlzIGNvbW1pdCB0byB1bmRlcnN0 YW5kCnRoYXQgb25lIGhhZCB0byBlbmFibGUgcHVsbGRvd24gdG8gcmVzdG9yZSBoczQwMC4KCklu IG1vcmUgdGhhbiAzIHllYXJzLCBvbmx5IG9uZSBib2FyZCBtYWludGFpbmVyIG5vdGljZWQgdGhh dCB0aGlzCnByb3BlcnR5IHdhcyByZXF1aXJlZCB0byBnZXQgYmFjayBIUzQwMCAgYW5kIHRoYW5r cyB0byBhIHVzZXIgdGVsbGluZwptZSB0aGF0IHRoaXMgYm9hcmQgd2FzIHdvcmtpbmcgSSBmb3Vu ZCBmcm9tIHRoaXMgYm9hcmQgdGhhdCB0aGlzCnByb3BlcnR5IHdhcyAibWlzc2luZyIgZnJvbSBt b3N0IGJvYXJkIGRlZmluaXRpb25zICh3aGlsZSBpdCB3YXMgbm90CnJlcXVpcmVkIGJlZm9yZSku CgoKSSBhbSBhbGwgZm9yIG5vdCBicmVha2luZyBBQkkuIEJ1dCB3aGF0IGFib3V0IG5vdCByZXZl cnRpbmcgYSBwYXRjaAp0aGF0IGFscmVhZHkgYnJva2UgQUJJIGJlY2F1c2UgdGhpcyBwYXRjaCBp bnRyb2R1Y2VkIGEgbmV3IEFCSSB0aGF0IHdlCmRvbid0IHdhbnQgdG8gYnJlYWs/CkkgbWVhbiBz aG91bGRuJ3QgYSBuZXcgY29tbWl0IHdpdGggYSBuZXcgQUJJIHRoYXQgcmVncmVzc2VkIHRoZSBr ZXJuZWwKYmUgcmV2ZXJ0ZWQ/CgpNaW5kIGZpeGluZyB0aGUgaW5pdGlhbCByZWdyZXNzaW9uIDhi NWMyYjQ1YjhmMCAicGh5OiByb2NrY2hpcDogc2V0CnB1bGxkb3duIGZvciBzdHJvYmUgbGluZSBp biBkdHMiIGRvZXMgbm90IG5lY2Vzc2FyaWx5IG1lYW4gY2hhbmdpbmcgdGhlCmRlZmF1bHQgdG8g dGhlIG9wcG9zaXRlIHZhbHVlIGJ1dCBjb3VsZCBhbHNvIGJlIHJldmVydGluZyB0byBub3QKc2V0 dGluZyBhIGRlZmF1bHQuClRob3VnaCBJIGRvbid0IGtub3cgaWYgdGhlcmUgYXJlIHByb3MgdG8g c2V0dGluZyBhIGRlZmF1bHQuCgoKPiBJZiB0aGlzIHBhdGNoIGZpeGVzIGEgcHJvYmxlbSBvbiBh IGJvYXJkIHRoYXQgeW91IGhhdmUsIEkgd291bGQKPiBzdWdnZXN0Cj4gdGhhdCB5b3UgYWRkIHRo ZSBwcm9wZXJ0eSB0byBlbmFibGUgaXQsIGFzIHRoZSBiaW5kaW5nIHRlbGxzIHlvdSB0by4KPiAK PiBUaGFua3MsCj4gQ29ub3IuCgoKUmVnYXJkcywKQWxiYW4KCi0tIApsaW51eC1waHkgbWFpbGlu ZyBsaXN0CmxpbnV4LXBoeUBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHBzOi8vbGlzdHMuaW5mcmFk ZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LXBoeQo= 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 42BD8CD11DD for ; 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Thu, 28 Mar 2024 10:00:24 -0700 (PDT) Received: from [192.168.1.63] ([109.28.199.236]) by smtp.gmail.com with ESMTPSA id p14-20020a05640210ce00b0056c4f8130c3sm1047007edu.82.2024.03.28.10.00.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Mar 2024 10:00:23 -0700 (PDT) Message-ID: <871f0b24a38208d9c5d6abc87d83b067162c103e.camel@gmail.com> Subject: Re: [PATCH 1/3] phy: rockchip: emmc: Enable pulldown for strobe line From: Alban Browaeys To: Conor Dooley , dev@folker-schwesinger.de Cc: Vinod Koul , Kishon Vijay Abraham I , Heiko Stuebner , Chris Ruehl , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Christopher Obbard , Doug Anderson , Brian Norris , Jensen Huang , linux-phy@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Date: Thu, 28 Mar 2024 18:00:03 +0100 In-Reply-To: <20240326-tactical-onlooker-3df8d2352dc2@spud> References: <20240326-rk-default-enable-strobe-pulldown-v1-0-f410c71605c0@folker-schwesinger.de> <20240326-rk-default-enable-strobe-pulldown-v1-1-f410c71605c0@folker-schwesinger.de> <20240326-tactical-onlooker-3df8d2352dc2@spud> Autocrypt: addr=alban.browaeys@gmail.com; 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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 TGUgbWFyZGkgMjYgbWFycyAyMDI0IMOgIDE5OjQ2ICswMDAwLCBDb25vciBEb29sZXkgYSDDqWNy aXTCoDoKPiBPbiBUdWUsIE1hciAyNiwgMjAyNCBhdCAwNzo1NDozNVBNICswMTAwLCBGb2xrZXIg U2Nod2VzaW5nZXIgdmlhIEI0Cj4gUmVsYXkgd3JvdGU6Cj4gPiBGcm9tOiBGb2xrZXIgU2Nod2Vz aW5nZXIgPGRldkBmb2xrZXItc2Nod2VzaW5nZXIuZGU+Cj4gPiAtCWlmIChvZl9wcm9wZXJ0eV9y ZWFkX2Jvb2woZGV2LT5vZl9ub2RlLCAicm9ja2NoaXAsZW5hYmxlLQo+ID4gc3Ryb2JlLXB1bGxk b3duIikpCj4gPiAtCQlya19waHktPmVuYWJsZV9zdHJvYmVfcHVsbGRvd24gPQo+ID4gUEhZQ1RS TF9SRU5fU1RSQl9FTkFCTEU7Cj4gPiArCWlmIChvZl9wcm9wZXJ0eV9yZWFkX2Jvb2woZGV2LT5v Zl9ub2RlLCAicm9ja2NoaXAsZGlzYWJsZS0KPiA+IHN0cm9iZS1wdWxsZG93biIpKQo+ID4gKwkJ cmtfcGh5LT5lbmFibGVfc3Ryb2JlX3B1bGxkb3duID0KPiA+IFBIWUNUUkxfUkVOX1NUUkJfRElT QUJMRTsKPiAKPiBVbmZvcnR1bmF0ZWx5IHlvdSBjYW5ub3QgZG8gdGhpcy4KPiBQcmV2aW91c2x5 IG5vIHByb3BlcnR5IGF0IGFsbCBtZWFudCBkaXNhYmxlZCBhbmQgYSBwcm9wZXJ0eSB3YXMKPiBy ZXF1aXJlZAo+IHRvIGVuYWJsZSBpdC4gV2l0aCB0aGlzIGNoYW5nZSB0aGUgYWJzZW5jZSBvZiBh IHByb3BlcnR5IG1lYW5zIHRoYXQKPiBpdAo+IHdpbGwgYmUgZW5hYmxlZC4KPiBBbiBvbGQgZGV2 aWNldHJlZSBpcyB0aGF0IHdhbnRlZCB0aGlzIHRvIGJlIGRpc2FibGVkIHdvdWxkIGhhdmUgbm8K PiBwcm9wZXJ0eSBhbmQgd2lsbCBub3cgZW5kIHVwIHdpdGggaXQgZW5hYmxlZC4gVGhpcyBpcyBh biBBQkkgYnJlYWsKPiBhbmQgaXMKPiBjbGVhcmx5IG5vdCBiYWNrd2FyZHMgY29tcGF0aWJsZSwg dGhhdCdzIGEgTkFLIHVubGVzcyBpdCBpcwo+IGRlbW9uc3RyYWJsZQo+IHRoYXQgbm9vbmUgYWN0 dWFsbHkgd2FudHMgdG8gZGlzYWJsZSBpdCBhdCBhbGwuCgoKQnV0IHRoZSBwYXRjaCB0aGF0IGlu dHJvZHVjZWQgdGhlIG5ldyBkZWZhdWx0IHRvIGRpc2FibGUgdGhlIHB1bGxkb3duCmV4cGxpY2l0 ZWx5IGludHJvZHVjZWQgYSByZWdyZXNzaW9uIGZvciBhdCBsZWFzdCA0IGJvYXJkcy4KSXQgdG9v ayB0aW1lIHRvIHNvcnQgb3V0IHRoYXQgdGhlIGRlZmF1bHQgdG8gZGlzYWJsZSBwdWxsZG93biB3 YXMgdGhlCmN1bHByaXQgYnV0IHN0aWxsLgpXaWxsIHdlIGNhcnJ5IHRoaXMgbmV3IGJlaGF2b3Ig dGhhdCBicmVha3MgdGhlIGRlZmF1bHQgZGVzaWduIGZvcgpyazMzOTkgYmVjYXVzZSBzaW5jZSB0 aGUgcmVncmVzc2lvbiB3YXMgaW50cm9kdWNlZCBuZXcgYm9hcmQgZGVmaW5pdGlvbgptaWdodCBo YXZlIGV4cGNldGVkIHRoaXMgbmV3IGJlaGF2aW9yLgoKQ291bGQgdGhlIGJlc3Qgb3B0aW9uIGJl IHRvIHJldmVydCB0byDDqW5vdCBzZXQgYSBkZWZhdWx0IGVuYWJsZS9kaXNhYmxlCnB1bGxkb3du IiAoYXMgYmVmb3JlIHRoZSBjb21taXQgdGhhdCBpbnRyb2R1Y2VkIHRoZSByZWdyZXNzaW9uKSBh bmQKYWxsb3cgb25lIHRvIGZvcmNlIHRoZSBwdWxsZG93biB2aWEgdGhlIGVuYWJsZS9kaXNhYmxl IHB1bGxkb3duCnByb3BlcnR5PwpJIG1lYW4gdGhlIGNvbW1pdCB0aGF0IGludHJvZHVjZWQgYSBk ZWZhdWx0IHZhbHVlIGZvciB0aGUgcHVsbGRvd24gZGlkCm5vdCBzZWVtIHRvIGJlIGFib3V0IGZp eGluZyBhbnl0aGluZy4gQnV0IGl0IGJyb2tlIGEgbG90LiBBTmQgaXQgd2FzCnJlYWxseSByZWFs bHkgaGFyZCB0byBmaW5kIHRoZSBkZXNjcmlwdGlvbiBvZiB0aGlzIGNvbW1pdCB0byB1bmRlcnN0 YW5kCnRoYXQgb25lIGhhZCB0byBlbmFibGUgcHVsbGRvd24gdG8gcmVzdG9yZSBoczQwMC4KCklu IG1vcmUgdGhhbiAzIHllYXJzLCBvbmx5IG9uZSBib2FyZCBtYWludGFpbmVyIG5vdGljZWQgdGhh dCB0aGlzCnByb3BlcnR5IHdhcyByZXF1aXJlZCB0byBnZXQgYmFjayBIUzQwMCAgYW5kIHRoYW5r cyB0byBhIHVzZXIgdGVsbGluZwptZSB0aGF0IHRoaXMgYm9hcmQgd2FzIHdvcmtpbmcgSSBmb3Vu ZCBmcm9tIHRoaXMgYm9hcmQgdGhhdCB0aGlzCnByb3BlcnR5IHdhcyAibWlzc2luZyIgZnJvbSBt b3N0IGJvYXJkIGRlZmluaXRpb25zICh3aGlsZSBpdCB3YXMgbm90CnJlcXVpcmVkIGJlZm9yZSku CgoKSSBhbSBhbGwgZm9yIG5vdCBicmVha2luZyBBQkkuIEJ1dCB3aGF0IGFib3V0IG5vdCByZXZl cnRpbmcgYSBwYXRjaAp0aGF0IGFscmVhZHkgYnJva2UgQUJJIGJlY2F1c2UgdGhpcyBwYXRjaCBp bnRyb2R1Y2VkIGEgbmV3IEFCSSB0aGF0IHdlCmRvbid0IHdhbnQgdG8gYnJlYWs/CkkgbWVhbiBz aG91bGRuJ3QgYSBuZXcgY29tbWl0IHdpdGggYSBuZXcgQUJJIHRoYXQgcmVncmVzc2VkIHRoZSBr ZXJuZWwKYmUgcmV2ZXJ0ZWQ/CgpNaW5kIGZpeGluZyB0aGUgaW5pdGlhbCByZWdyZXNzaW9uIDhi NWMyYjQ1YjhmMCAicGh5OiByb2NrY2hpcDogc2V0CnB1bGxkb3duIGZvciBzdHJvYmUgbGluZSBp biBkdHMiIGRvZXMgbm90IG5lY2Vzc2FyaWx5IG1lYW4gY2hhbmdpbmcgdGhlCmRlZmF1bHQgdG8g dGhlIG9wcG9zaXRlIHZhbHVlIGJ1dCBjb3VsZCBhbHNvIGJlIHJldmVydGluZyB0byBub3QKc2V0 dGluZyBhIGRlZmF1bHQuClRob3VnaCBJIGRvbid0IGtub3cgaWYgdGhlcmUgYXJlIHByb3MgdG8g c2V0dGluZyBhIGRlZmF1bHQuCgoKPiBJZiB0aGlzIHBhdGNoIGZpeGVzIGEgcHJvYmxlbSBvbiBh IGJvYXJkIHRoYXQgeW91IGhhdmUsIEkgd291bGQKPiBzdWdnZXN0Cj4gdGhhdCB5b3UgYWRkIHRo ZSBwcm9wZXJ0eSB0byBlbmFibGUgaXQsIGFzIHRoZSBiaW5kaW5nIHRlbGxzIHlvdSB0by4KPiAK PiBUaGFua3MsCj4gQ29ub3IuCgoKUmVnYXJkcywKQWxiYW4KCl9fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4LWFybS1rZXJuZWwgbWFpbGluZyBsaXN0 CmxpbnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFk ZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LWFybS1rZXJuZWwK From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ed1-f43.google.com (mail-ed1-f43.google.com [209.85.208.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 65FC064CE1; 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Thu, 28 Mar 2024 10:00:24 -0700 (PDT) Received: from [192.168.1.63] ([109.28.199.236]) by smtp.gmail.com with ESMTPSA id p14-20020a05640210ce00b0056c4f8130c3sm1047007edu.82.2024.03.28.10.00.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Mar 2024 10:00:23 -0700 (PDT) Message-ID: <871f0b24a38208d9c5d6abc87d83b067162c103e.camel@gmail.com> Subject: Re: [PATCH 1/3] phy: rockchip: emmc: Enable pulldown for strobe line From: Alban Browaeys To: Conor Dooley , dev@folker-schwesinger.de Cc: Vinod Koul , Kishon Vijay Abraham I , Heiko Stuebner , Chris Ruehl , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Christopher Obbard , Doug Anderson , Brian Norris , Jensen Huang , linux-phy@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Date: Thu, 28 Mar 2024 18:00:03 +0100 In-Reply-To: <20240326-tactical-onlooker-3df8d2352dc2@spud> References: <20240326-rk-default-enable-strobe-pulldown-v1-0-f410c71605c0@folker-schwesinger.de> <20240326-rk-default-enable-strobe-pulldown-v1-1-f410c71605c0@folker-schwesinger.de> <20240326-tactical-onlooker-3df8d2352dc2@spud> Autocrypt: addr=alban.browaeys@gmail.com; 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charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.3-1 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Le mardi 26 mars 2024 =C3=A0 19:46 +0000, Conor Dooley a =C3=A9crit=C2=A0: > On Tue, Mar 26, 2024 at 07:54:35PM +0100, Folker Schwesinger via B4 > Relay wrote: > > From: Folker Schwesinger > > - if (of_property_read_bool(dev->of_node, "rockchip,enable- > > strobe-pulldown")) > > - rk_phy->enable_strobe_pulldown =3D > > PHYCTRL_REN_STRB_ENABLE; > > + if (of_property_read_bool(dev->of_node, "rockchip,disable- > > strobe-pulldown")) > > + rk_phy->enable_strobe_pulldown =3D > > PHYCTRL_REN_STRB_DISABLE; >=20 > Unfortunately you cannot do this. > Previously no property at all meant disabled and a property was > required > to enable it. With this change the absence of a property means that > it > will be enabled. > An old devicetree is that wanted this to be disabled would have no > property and will now end up with it enabled. This is an ABI break > and is > clearly not backwards compatible, that's a NAK unless it is > demonstrable > that noone actually wants to disable it at all. But the patch that introduced the new default to disable the pulldown explicitely introduced a regression for at least 4 boards. It took time to sort out that the default to disable pulldown was the culprit but still. Will we carry this new behavor that breaks the default design for rk3399 because since the regression was introduced new board definition might have expceted this new behavior. Could the best option be to revert to =C3=A9not set a default enable/disabl= e pulldown" (as before the commit that introduced the regression) and allow one to force the pulldown via the enable/disable pulldown property? I mean the commit that introduced a default value for the pulldown did not seem to be about fixing anything. But it broke a lot. ANd it was really really hard to find the description of this commit to understand that one had to enable pulldown to restore hs400. In more than 3 years, only one board maintainer noticed that this property was required to get back HS400 and thanks to a user telling me that this board was working I found from this board that this property was "missing" from most board definitions (while it was not required before). I am all for not breaking ABI. But what about not reverting a patch that already broke ABI because this patch introduced a new ABI that we don't want to break? I mean shouldn't a new commit with a new ABI that regressed the kernel be reverted? Mind fixing the initial regression 8b5c2b45b8f0 "phy: rockchip: set pulldown for strobe line in dts" does not necessarily mean changing the default to the opposite value but could also be reverting to not setting a default. Though I don't know if there are pros to setting a default. > If this patch fixes a problem on a board that you have, I would > suggest > that you add the property to enable it, as the binding tells you to. >=20 > Thanks, > Conor. Regards, Alban