From mboxrd@z Thu Jan 1 00:00:00 1970 From: Miquel Raynal Subject: Re: [PATCH 2/5] mtd: rawnand: mtk: Improve data sampling timing for read cycle Date: Mon, 29 Apr 2019 11:10:22 +0200 Message-ID: <20190429111022.50c3182c@xps13> References: <20190429063834.45967-1-xiaolei.li@mediatek.com> <20190429063834.45967-3-xiaolei.li@mediatek.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <20190429063834.45967-3-xiaolei.li-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+glpam-linux-mediatek=m.gmane.org-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org To: Xiaolei Li Cc: richard-/L3Ra7n9ekc@public.gmane.org, linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-mtd-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, srv_heupstream-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org List-Id: linux-mediatek@lists.infradead.org SGkgWGlhb2xlaSwKClhpYW9sZWkgTGkgPHhpYW9sZWkubGlAbWVkaWF0ZWsuY29tPiB3cm90ZSBv biBNb24sIDI5IEFwciAyMDE5IDE0OjM4OjMxCiswODAwOgoKPiBDdXJyZW50bHksIHdlIGV4cGFu ZCBSRSMgbG93IGxldmVsIHRpbWUgYnkgY2hvb3NpbmcgdGhlIG1heCB2YWx1ZQo+IGJldHdlZW4g UkUjIHB1bHNlIHdpZHRoIGFuZCBSRSMgYWNjZXNzIHRpbWUsIGFuZCBzYW1wbGUgZGF0YSBhdCB0 aGUKPiByaXNpbmcgZWRnZSBvZiBSRSMuCj4gCj4gVGhlbiwgaWYgUkUjIGFjY2VzcyB0aW1lIGlz IGJpZ2dlciB0aGFuIFJFIyBwdWxzZSB3aWR0aCwgdGhlIHJlYWwKPiByZWFkIGN5Y2xlIHRpbWUg bWF5IGJlIG1vcmUgdGhhbiBOQU5EIFNQRUMgcmVxdWlyZWQuIFRoaXMgbWFrZXMKPiByZWFkIHBl cmZvcm1hbmNlIGJlIHdvcnNlIHRoYW4gdGhhdCBleHBlY3RlZC4KPiAKPiBUaGlzIHBhdGNoIGlt cHJvdmVzIGRhdGEgc2FtcGxpbmcgdGltaW5nIGJ5IGNhbGN1bGF0aW5nIFJFIyBsb3cgbGV2ZWwK PiB0aW1lIGFjY29yZGluZyB0byBSRSMgcHVsc2Ugd2lkdGguIElmIFJFIyBhY2Nlc3MgdGltZSBp cyBiaWdnZXIgdGhhbgo+IFJFIyBwdWxzZSB3aWR0aCwgdGhlbiBkZWxheSBzYW1wbGluZyBkYXRh IHRpbWluZy4KPiAKPiBUaGUgcmVzdWx0IG9mIGNvbnRyYXN0IHRlc3QgYmFzZSBvbiBNVDI3MTIg ZXZhbHVhdCBib2FyZCBpcyBhcyBmb2xsb3cuCj4gCj4gbmFuZDogTWljcm9uIE1UMjlGMTZHMDhB REJDQUg0Cj4gbmFuZDogMjA0OCBNaUIsIFNMQywgZXJhc2Ugc2l6ZTogMjU2IEtpQiwgcGFnZSBz aXplOiA0MDk2LCBPT0Igc2l6ZTogMjI0Cj4gCj4gTkZJIDJ4IGNsb2NrIHJhdGU6IDEyNDgwMDAw MCBIWi4KPiAKPiBUZXN0IHRvb2w6IG10ZF9zcGVlZHRlc3Qua28KPiAKPiBSZWFkIHNwZWVkIHdp dGhvdXQgdGhpcyBwYXRjaDoKPiBtdGRfc3BlZWR0ZXN0OiBwYWdlIHJlYWQgc3BlZWQgaXMgMTQw MTIgS2lCL3MKPiBtdGRfc3BlZWR0ZXN0OiAyIHBhZ2UgcmVhZCBzcGVlZCBpcyAxNDg2MCBLaUIv cwo+IAo+IFJlYWQgc3BlZWQgd2l0aCB0aGlzIHBhdGNoOgo+IG10ZF9zcGVlZHRlc3Q6IHBhZ2Ug cmVhZCBzcGVlZCBpcyAxODcyNCBLaUIvcwo+IG10ZF9zcGVlZHRlc3Q6IDIgcGFnZSByZWFkIHNw ZWVkIGlzIDE4NzEzIEtpQi9zCj4gCj4gU2lnbmVkLW9mZi1ieTogWGlhb2xlaSBMaSA8eGlhb2xl aS5saUBtZWRpYXRlay5jb20+Cj4gLS0tCj4gIGRyaXZlcnMvbXRkL25hbmQvcmF3L210a19uYW5k LmMgfCAyMiArKysrKysrKysrKysrKysrKysrKystCj4gIDEgZmlsZSBjaGFuZ2VkLCAyMSBpbnNl cnRpb25zKCspLCAxIGRlbGV0aW9uKC0pCj4gCj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvbXRkL25h bmQvcmF3L210a19uYW5kLmMgYi9kcml2ZXJzL210ZC9uYW5kL3Jhdy9tdGtfbmFuZC5jCj4gaW5k ZXggZGQ4NTVmODYwYTRiLi5hMmY3YWY1MzYzODAgMTAwNjQ0Cj4gLS0tIGEvZHJpdmVycy9tdGQv bmFuZC9yYXcvbXRrX25hbmQuYwo+ICsrKyBiL2RyaXZlcnMvbXRkL25hbmQvcmF3L210a19uYW5k LmMKPiBAQCAtODcsNiArODcsMTAgQEAKPiAgI2RlZmluZSBORklfRkRNTSh4KQkJKDB4QTQgKyAo eCkgKiBzaXplb2YodTMyKSAqIDIpCj4gICNkZWZpbmUgTkZJX0ZETV9NQVhfU0laRQkoOCkKPiAg I2RlZmluZSBORklfRkRNX01JTl9TSVpFCSgxKQo+ICsjZGVmaW5lIE5GSV9ERUJVR19DT04xCQko MHgyMjApCj4gKyNkZWZpbmUJCVNUUk9CRV9NQVNLCQlHRU5NQVNLKDQsIDMpCj4gKyNkZWZpbmUJ CVNUUk9CRV9TSElGVAkJKDMpCj4gKyNkZWZpbmUJCU1BWF9TVFJPQkVfRExZCQkoMykKPiAgI2Rl ZmluZSBORklfTUFTVEVSX1NUQQkJKDB4MjI0KQo+ICAjZGVmaW5lCQlNQVNURVJfU1RBX01BU0sJ CSgweDBGRkYpCj4gICNkZWZpbmUgTkZJX0VNUFRZX1RIUkVTSAkoMHgyM0MpCj4gQEAgLTUwOSw2 ICs1MTMsNyBAQCBzdGF0aWMgaW50IG10a19uZmNfc2V0dXBfZGF0YV9pbnRlcmZhY2Uoc3RydWN0 IG5hbmRfY2hpcCAqY2hpcCwgaW50IGNzbGluZSwKPiAgCXN0cnVjdCBtdGtfbmZjICpuZmMgPSBu YW5kX2dldF9jb250cm9sbGVyX2RhdGEoY2hpcCk7Cj4gIAljb25zdCBzdHJ1Y3QgbmFuZF9zZHJf dGltaW5ncyAqdGltaW5nczsKPiAgCXUzMiByYXRlLCB0cG9lY3MsIHRwcmVjcywgdGMyciwgdHcy ciwgdHdoLCB0d3N0ID0gMCwgdHJsdCA9IDA7Cj4gKwl1MzIgdHNlbCwgcmVnOwo+ICAKPiAgCXRp bWluZ3MgPSBuYW5kX2dldF9zZHJfdGltaW5ncyhjb25mKTsKPiAgCWlmIChJU19FUlIodGltaW5n cykpCj4gQEAgLTU1NiwxMCArNTYxLDI1IEBAIHN0YXRpYyBpbnQgbXRrX25mY19zZXR1cF9kYXRh X2ludGVyZmFjZShzdHJ1Y3QgbmFuZF9jaGlwICpjaGlwLCBpbnQgY3NsaW5lLAo+ICAJaWYgKCh0 d2ggKyAxKSAqIDEwMDAwMDAgLyByYXRlIDwgdGltaW5ncy0+dFJDX21pbiAvIDEwMDApCj4gIAkJ dHJsdCA9ICh0aW1pbmdzLT50UkNfbWluIC8gMTAwMCAtICh0d2ggKyAxKSAqIDEwMDAwMDAgLyBy YXRlKQo+ICAJCQkqIDEwMDA7Cj4gLQl0cmx0ID0gbWF4Myh0cmx0LCB0aW1pbmdzLT50UkVBX21h eCwgdGltaW5ncy0+dFJQX21pbikgLyAxMDAwOwo+ICsJdHJsdCA9IG1heCh0cmx0LCB0aW1pbmdz LT50UlBfbWluKSAvIDEwMDA7Cj4gIAl0cmx0ID0gRElWX1JPVU5EX1VQKHRybHQgKiByYXRlLCAx MDAwMDAwKSAtIDE7Cj4gIAl0cmx0ICY9IDB4ZjsKPiAgCj4gKwkvKiBDYWxjdWxhdGUgc3Ryb2Jl IHNlbCAqLwo+ICsJcmVnID0gbmZpX3JlYWRsKG5mYywgTkZJX0RFQlVHX0NPTjEpOwo+ICsJcmVn ICY9IH5TVFJPQkVfTUFTSzsKPiArCWlmICgodHJsdCArIDEpICogMTAwMDAwMCAvIHJhdGUgPCB0 aW1pbmdzLT50UkVBX21heCAvIDEwMDApIHsKClBsZWFzZSBkbyB0aGUgY2FsY3VsYXRpb24gYW5k IGNvbmRpdGlvbiBpbiBzZXBhcmF0ZSBzdGVwLCB0aGlzIGlzCmhhcmRseSByZWFkYWJsZS4gTWF5 YmUgeW91IGNhbiBleHBsYWluIGl0IHdpdGggYSBjb21tZW50IGFzIHdlbGwuCgo+ICsJCXRzZWwg PSB0aW1pbmdzLT50UkVBX21heCAvIDEwMDA7Cj4gKwkJdHNlbCA9IERJVl9ST1VORF9VUCh0c2Vs ICogcmF0ZSwgMTAwMDAwMCk7CgpBcmUgeW91IHN1cmUgdHNlbCAqIHJhdGUgY2Fubm90IG92ZXJm bG93PwoKPiArCQl0c2VsIC09ICh0cmx0ICsgMSk7Cj4gKwkJaWYgKHRzZWwgPiBNQVhfU1RST0JF X0RMWSkgewo+ICsJCQl0cmx0ICs9IHRzZWwgLSBNQVhfU1RST0JFX0RMWTsKPiArCQkJdHNlbCA9 IE1BWF9TVFJPQkVfRExZOwo+ICsJCX0KPiArCQlyZWcgfD0gdHNlbCA8PCBTVFJPQkVfU0hJRlQ7 Cj4gKwl9Cj4gKwluZmlfd3JpdGVsKG5mYywgcmVnLCBORklfREVCVUdfQ09OMSk7Cj4gKwo+ICAJ LyoKPiAgCSAqIEFDQ09OOiBhY2Nlc3MgdGltaW5nIGNvbnRyb2wgcmVnaXN0ZXIKPiAgCSAqIC0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0KCgoKClRoYW5rcywKTWlxdcOobAoK X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTGludXgtbWVk aWF0ZWsgbWFpbGluZyBsaXN0CkxpbnV4LW1lZGlhdGVrQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0 cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1tZWRpYXRlawo=