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[88.156.142.67]) by smtp.gmail.com with ESMTPSA id u13-20020a05651206cd00b0049fbf5facf4sm167617lff.75.2022.11.30.00.35.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 30 Nov 2022 00:35:05 -0800 (PST) Message-ID: Date: Wed, 30 Nov 2022 09:35:04 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.5.0 Subject: Re: [PATCH 7/9] dt-bindings: spi: mtk-snfi: add two timing delay property Content-Language: en-US To: =?UTF-8?B?WGlhbmdzaGVuZyBIb3UgKOS+r+elpeiDnCk=?= , "miquel.raynal@bootlin.com" , "robh+dt@kernel.org" , "broonie@kernel.org" , "krzysztof.kozlowski+dt@linaro.org" , "matthias.bgg@gmail.com" , "gch981213@gmail.com" , "vigneshr@ti.com" , "richard@nod.at" Cc: "linux-kernel@vger.kernel.org" , "linux-mediatek@lists.infradead.org" , "linux-mtd@lists.infradead.org" , "devicetree@vger.kernel.org" , =?UTF-8?B?QmVubGlhbmcgWmhhbyAo6LW15pys5LquKQ==?= , "linux-spi@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , =?UTF-8?B?QmluIFpoYW5nICjnq6Dmlowp?= References: <20221128020613.14821-1-xiangsheng.hou@mediatek.com> <20221128020613.14821-8-xiangsheng.hou@mediatek.com> <9985d44e-977e-d7ea-0932-4879a3ccd14d@linaro.org> <08ebc76a-0220-f984-b546-23dba8677be9@linaro.org> <741d7ce16df25450b08c92e508190bc7c91fc8d9.camel@mediatek.com> From: Krzysztof Kozlowski In-Reply-To: <741d7ce16df25450b08c92e508190bc7c91fc8d9.camel@mediatek.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221130_003508_095145_4CB410A2 X-CRM114-Status: GOOD ( 12.95 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org On 30/11/2022 09:18, Xiangsheng Hou (侯祥胜) wrote: > Hi Krzysztof, > > On Tue, 2022-11-29 at 08:47 +0100, Krzysztof Kozlowski wrote: >> On 29/11/2022 03:50, Xiangsheng Hou (侯祥胜) wrote: >> >>>>> --- a/Documentation/devicetree/bindings/spi/mediatek,spi-mtk- >>>>> snfi.yaml >>>>> +++ b/Documentation/devicetree/bindings/spi/mediatek,spi-mtk- >>>>> snfi.yaml >>>>> @@ -55,6 +55,22 @@ properties: >>>>> description: device-tree node of the accompanying ECC >>>>> engine. >>>>> $ref: /schemas/types.yaml#/definitions/phandle >>>>> >>>>> + rx-sample-delay: >>>> >>>> No, use existing property, don't invent your own stuff - missing >>>> unit >>>> suffix. See spi-peripheral-props.yaml. >>> >>> Will change to other private property. The read sample delay with >>> MediaTek SPI NAND controller can be set with values from 0 to 47. >>> However, it`s difficult to say the unit of each vaule, because the >>> unit >>> value will be difference with different chip process or different >>> corner IC. >> >> Why you cannot use same formula as other SPI drivers for sample- >> delay? >> And divide/multiple by some factor specific to SoC, which is taken >> from >> driver_data? > > Even for specific SoC, the unit of sample delay may be various with > different corner IC. Which is easy to achieve with driver_data as I said. > Besides, whether it`s acceptable by change the property rx-sample-delay > and rx-latch-latency to mediatek,rx-sample-delay and mediatek,rx-latch- > latency? Not for sample delay, because you should use existing properties. Your driver implementation is not usually argument to duplicate properties in the bindings. 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[88.156.142.67]) by smtp.gmail.com with ESMTPSA id u13-20020a05651206cd00b0049fbf5facf4sm167617lff.75.2022.11.30.00.35.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 30 Nov 2022 00:35:05 -0800 (PST) Message-ID: Date: Wed, 30 Nov 2022 09:35:04 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.5.0 Subject: Re: [PATCH 7/9] dt-bindings: spi: mtk-snfi: add two timing delay property Content-Language: en-US To: =?UTF-8?B?WGlhbmdzaGVuZyBIb3UgKOS+r+elpeiDnCk=?= , "miquel.raynal@bootlin.com" , "robh+dt@kernel.org" , "broonie@kernel.org" , "krzysztof.kozlowski+dt@linaro.org" , "matthias.bgg@gmail.com" , "gch981213@gmail.com" , "vigneshr@ti.com" , "richard@nod.at" Cc: "linux-kernel@vger.kernel.org" , "linux-mediatek@lists.infradead.org" , "linux-mtd@lists.infradead.org" , "devicetree@vger.kernel.org" , =?UTF-8?B?QmVubGlhbmcgWmhhbyAo6LW15pys5LquKQ==?= , "linux-spi@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , =?UTF-8?B?QmluIFpoYW5nICjnq6Dmlowp?= References: <20221128020613.14821-1-xiangsheng.hou@mediatek.com> <20221128020613.14821-8-xiangsheng.hou@mediatek.com> <9985d44e-977e-d7ea-0932-4879a3ccd14d@linaro.org> <08ebc76a-0220-f984-b546-23dba8677be9@linaro.org> <741d7ce16df25450b08c92e508190bc7c91fc8d9.camel@mediatek.com> From: Krzysztof Kozlowski In-Reply-To: <741d7ce16df25450b08c92e508190bc7c91fc8d9.camel@mediatek.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221130_003508_320760_911EF4FC X-CRM114-Status: GOOD ( 13.49 ) 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; 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[88.156.142.67]) by smtp.gmail.com with ESMTPSA id u13-20020a05651206cd00b0049fbf5facf4sm167617lff.75.2022.11.30.00.35.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 30 Nov 2022 00:35:05 -0800 (PST) Message-ID: Date: Wed, 30 Nov 2022 09:35:04 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.5.0 Subject: Re: [PATCH 7/9] dt-bindings: spi: mtk-snfi: add two timing delay property Content-Language: en-US To: =?UTF-8?B?WGlhbmdzaGVuZyBIb3UgKOS+r+elpeiDnCk=?= , "miquel.raynal@bootlin.com" , "robh+dt@kernel.org" , "broonie@kernel.org" , "krzysztof.kozlowski+dt@linaro.org" , "matthias.bgg@gmail.com" , "gch981213@gmail.com" , "vigneshr@ti.com" , "richard@nod.at" Cc: "linux-kernel@vger.kernel.org" , "linux-mediatek@lists.infradead.org" , "linux-mtd@lists.infradead.org" , "devicetree@vger.kernel.org" , =?UTF-8?B?QmVubGlhbmcgWmhhbyAo6LW15pys5LquKQ==?= , "linux-spi@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , =?UTF-8?B?QmluIFpoYW5nICjnq6Dmlowp?= References: <20221128020613.14821-1-xiangsheng.hou@mediatek.com> <20221128020613.14821-8-xiangsheng.hou@mediatek.com> <9985d44e-977e-d7ea-0932-4879a3ccd14d@linaro.org> <08ebc76a-0220-f984-b546-23dba8677be9@linaro.org> <741d7ce16df25450b08c92e508190bc7c91fc8d9.camel@mediatek.com> From: Krzysztof Kozlowski In-Reply-To: <741d7ce16df25450b08c92e508190bc7c91fc8d9.camel@mediatek.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221130_003508_090394_2161EDE7 X-CRM114-Status: GOOD ( 14.26 ) X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gMzAvMTEvMjAyMiAwOToxOCwgWGlhbmdzaGVuZyBIb3UgKOS+r+elpeiDnCkgd3JvdGU6Cj4g SGkgS3J6eXN6dG9mLAo+IAo+IE9uIFR1ZSwgMjAyMi0xMS0yOSBhdCAwODo0NyArMDEwMCwgS3J6 eXN6dG9mIEtvemxvd3NraSB3cm90ZToKPj4gT24gMjkvMTEvMjAyMiAwMzo1MCwgWGlhbmdzaGVu ZyBIb3UgKOS+r+elpeiDnCkgd3JvdGU6Cj4+Cj4+Pj4+IC0tLSBhL0RvY3VtZW50YXRpb24vZGV2 aWNldHJlZS9iaW5kaW5ncy9zcGkvbWVkaWF0ZWssc3BpLW10ay0KPj4+Pj4gc25maS55YW1sCj4+ Pj4+ICsrKyBiL0RvY3VtZW50YXRpb24vZGV2aWNldHJlZS9iaW5kaW5ncy9zcGkvbWVkaWF0ZWss c3BpLW10ay0KPj4+Pj4gc25maS55YW1sCj4+Pj4+IEBAIC01NSw2ICs1NSwyMiBAQCBwcm9wZXJ0 aWVzOgo+Pj4+PiAgICAgIGRlc2NyaXB0aW9uOiBkZXZpY2UtdHJlZSBub2RlIG9mIHRoZSBhY2Nv bXBhbnlpbmcgRUNDCj4+Pj4+IGVuZ2luZS4KPj4+Pj4gICAgICAkcmVmOiAvc2NoZW1hcy90eXBl cy55YW1sIy9kZWZpbml0aW9ucy9waGFuZGxlCj4+Pj4+ICAKPj4+Pj4gKyAgcngtc2FtcGxlLWRl bGF5Ogo+Pj4+Cj4+Pj4gTm8sIHVzZSBleGlzdGluZyBwcm9wZXJ0eSwgZG9uJ3QgaW52ZW50IHlv dXIgb3duIHN0dWZmIC0gbWlzc2luZwo+Pj4+IHVuaXQKPj4+PiBzdWZmaXguIFNlZSBzcGktcGVy aXBoZXJhbC1wcm9wcy55YW1sLgo+Pj4KPj4+IFdpbGwgY2hhbmdlIHRvIG90aGVyIHByaXZhdGUg cHJvcGVydHkuIFRoZSByZWFkIHNhbXBsZSBkZWxheSB3aXRoCj4+PiBNZWRpYVRlayBTUEkgTkFO RCBjb250cm9sbGVyIGNhbiBiZSBzZXQgd2l0aCB2YWx1ZXMgZnJvbSAwIHRvIDQ3Lgo+Pj4gSG93 ZXZlciwgaXRgcyBkaWZmaWN1bHQgdG8gc2F5IHRoZSB1bml0IG9mIGVhY2ggdmF1bGUsIGJlY2F1 c2UgdGhlCj4+PiB1bml0Cj4+PiB2YWx1ZSB3aWxsIGJlIGRpZmZlcmVuY2Ugd2l0aCBkaWZmZXJl bnQgY2hpcCBwcm9jZXNzIG9yIGRpZmZlcmVudAo+Pj4gY29ybmVyIElDLgo+Pgo+PiBXaHkgeW91 IGNhbm5vdCB1c2Ugc2FtZSBmb3JtdWxhIGFzIG90aGVyIFNQSSBkcml2ZXJzIGZvciBzYW1wbGUt Cj4+IGRlbGF5Pwo+PiBBbmQgZGl2aWRlL211bHRpcGxlIGJ5IHNvbWUgZmFjdG9yIHNwZWNpZmlj IHRvIFNvQywgd2hpY2ggaXMgdGFrZW4KPj4gZnJvbQo+PiBkcml2ZXJfZGF0YT8KPiAKPiBFdmVu IGZvciBzcGVjaWZpYyBTb0MsIHRoZSB1bml0IG9mIHNhbXBsZSBkZWxheSBtYXkgYmUgdmFyaW91 cyB3aXRoCj4gZGlmZmVyZW50IGNvcm5lciBJQy4KCldoaWNoIGlzIGVhc3kgdG8gYWNoaWV2ZSB3 aXRoIGRyaXZlcl9kYXRhIGFzIEkgc2FpZC4KCj4gQmVzaWRlcywgd2hldGhlciBpdGBzIGFjY2Vw dGFibGUgYnkgY2hhbmdlIHRoZSBwcm9wZXJ0eSByeC1zYW1wbGUtZGVsYXkgCj4gYW5kIHJ4LWxh dGNoLWxhdGVuY3kgdG8gbWVkaWF0ZWsscngtc2FtcGxlLWRlbGF5IGFuZCBtZWRpYXRlayxyeC1s YXRjaC0KPiBsYXRlbmN5PwoKTm90IGZvciBzYW1wbGUgZGVsYXksIGJlY2F1c2UgeW91IHNob3Vs ZCB1c2UgZXhpc3RpbmcgcHJvcGVydGllcy4gWW91cgpkcml2ZXIgaW1wbGVtZW50YXRpb24gaXMg bm90IHVzdWFsbHkgYXJndW1lbnQgdG8gZHVwbGljYXRlIHByb3BlcnRpZXMgaW4KdGhlIGJpbmRp bmdzLgoKQmVzdCByZWdhcmRzLApLcnp5c3p0b2YKCgpfX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1hcm0ta2VybmVsIG1haWxpbmcgbGlzdApsaW51 eC1hcm0ta2VybmVsQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5v cmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1hcm0ta2VybmVsCg==