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Thu, 20 Aug 2026 08:44:31 +0200 From: To: , , , , , , , , , CC: , , , , , , Subject: RE: [PATCH v3 18/23] mtd: spi-nor: winbond: Add support for W25Q12RV-M Thread-Topic: [PATCH v3 18/23] mtd: spi-nor: winbond: Add support for W25Q12RV-M Thread-Index: AQHdKzdZvgsYuAZvr06GheipzTEvC7amhBRA Date: Thu, 20 Aug 2026 06:44:31 +0000 Message-ID: <889b2fa10c5e4c6ea22ede16baa22b44@infineon.com> References: <20260813-winbond-v7-1-spi-nor-rv-addition-v3-0-b637cf120d5c@bootlin.com> <20260813-winbond-v7-1-spi-nor-rv-addition-v3-18-b637cf120d5c@bootlin.com> In-Reply-To: <20260813-winbond-v7-1-spi-nor-rv-addition-v3-18-b637cf120d5c@bootlin.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 SGkgTWlxdWVsLA0KDQo+IFRoZXJlIGlzIGFuIElEIGNvbGxpc2lvbiB3aXRoIHRoZSBjaGlwIG9m IHNhbWUgZGVuc2l0eSBmcm9tIHRoZSBKVg0KPiBmYW1pbHkuIEJvdGggY2hpcHMgYXJlIHZlcnkg c2ltaWxhciBpbiBwcmFjdGljZSwgaXQgaXMgbW9zdGx5IGEgbWF0dGVyDQo+IG9mIGVsZWN0cmlj YWwgZGlmZmVyZW5jZXMgKG1vc3RseSBwb3dlciBjb25zdW1wdGlvbiBiZWluZyBsb3dlcikuDQo+ IA0KPiBBcyBhIHNpZ25pZmljYW50IGRpZmZlcmVuY2UsIFJWIGNoaXBzIGlkZW50aWZ5IHRoZW1z ZWx2ZXMgYXMgc3VwcG9ydGluZw0KPiB0aGUgbmV3IFNGRFAgKHJldiBGKSBmaWVsZCB3aGljaCBm b3JjZXMgYW4gYWx0ZXJuYXRlIHdyaXRlIFNSMg0KPiBvcGNvZGUgKDB4MzEpLg0KPiANCj4gU2ln bmVkLW9mZi1ieTogTWlxdWVsIFJheW5hbCA8bWlxdWVsLnJheW5hbEBib290bGluLmNvbT4NCj4g LS0tDQo+ICsgY2F0IC9zeXMvYnVzL3NwaS9kZXZpY2VzL3NwaTAuMC9zcGktbm9yL2plZGVjX2lk DQo+IGVmNzAxOA0KPiArIGNhdCAvc3lzL2J1cy9zcGkvZGV2aWNlcy9zcGkwLjAvc3BpLW5vci9t YW51ZmFjdHVyZXINCj4gd2luYm9uZA0KPiArIHh4ZCAtcCAvc3lzL2J1cy9zcGkvZGV2aWNlcy9z cGkwLjAvc3BpLW5vci9zZmRwDQo+IDUzNDY0NDUwMGEwMTAwZmYwMDA4MDExNzgwMDAwMGZmZmZm ZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZg0KPiBmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZm ZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmYNCj4gZmZmZmZmZmZmZmZmZmZmZmZmZmZm ZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmDQo+IGZmZmZmZmZmZmZmZmZm ZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZg0KPiBmZmZmZmZm ZmZmZmZmZmZmZTUyMGY5ZmZmZmZmZmYwMzQ0ZWIwODZiMDgzYjQyYmJmZWZmZmZmZmZmZmYNCj4g MDAwMGZmZmY0NGViMGMyMDBmNTIxMGQ4MDAwMDE0MmEwMTAxODZlMTE0YzFlOTYzNzYzMzdhNzU3 YTc1DQo+IGY3YTJkNTVjMzlmNjZkZmZlOTMwZjg4MDAwMDAwMDAwMDAwMGFjMDAwMDAwMDAwMGY3 ZjVmZmZmMGYwMA0KPiAwMDAwMDYwZDQ0YmQyN2VkMDgwZA0KPiArIHNoYTI1NnN1bSAvc3lzL2J1 cy9zcGkvZGV2aWNlcy9zcGkwLjAvc3BpLW5vci9zZmRwDQo+IDk0YjUyZDZlOTAzYTIwNDZlMTQ0 ZWFiMDc2MDM4NGI2OTMyYzZmZGJmZWMxN2ViNzMzNmYxNzc4YzM4OThkYWYgIC9zeXMvYnVzL3Nw aS9kZXZpY2VzL3NwaTAuMC9zcGktbm9yL3NmZHANCj4gKyBjYXQgL3N5cy9rZXJuZWwvZGVidWcv c3BpLW5vci9zcGkwLjAvY2FwYWJpbGl0aWVzDQo+IFN1cHBvcnRlZCByZWFkIG1vZGVzIGJ5IHRo ZSBmbGFzaA0KPiAgMVMtMVMtMVMNCj4gICBvcGNvZGUgICAgICAgIDB4MDMNCj4gICBtb2RlIGN5 Y2xlcyAgIDANCj4gICBkdW1teSBjeWNsZXMgIDANCj4gIDFTLTFTLTJTDQo+ICAgb3Bjb2RlICAg ICAgICAweDNiDQo+ICAgbW9kZSBjeWNsZXMgICAwDQo+ICAgZHVtbXkgY3ljbGVzICA4DQo+ICAx Uy0yUy0yUw0KPiAgIG9wY29kZSAgICAgICAgMHhiYg0KPiAgIG1vZGUgY3ljbGVzICAgMg0KPiAg IGR1bW15IGN5Y2xlcyAgMg0KPiAgMVMtMVMtNFMNCj4gICBvcGNvZGUgICAgICAgIDB4NmINCj4g ICBtb2RlIGN5Y2xlcyAgIDANCj4gICBkdW1teSBjeWNsZXMgIDgNCj4gIDFTLTRTLTRTDQo+ICAg b3Bjb2RlICAgICAgICAweGViDQo+ICAgbW9kZSBjeWNsZXMgICAyDQo+ICAgZHVtbXkgY3ljbGVz ICA0DQo+ICA0Uy00Uy00Uw0KPiAgIG9wY29kZSAgICAgICAgMHhlYg0KPiAgIG1vZGUgY3ljbGVz ICAgMg0KPiAgIGR1bW15IGN5Y2xlcyAgNA0KPiANCj4gU3VwcG9ydGVkIHBhZ2UgcHJvZ3JhbSBt b2RlcyBieSB0aGUgZmxhc2gNCj4gIDFTLTFTLTFTDQo+ICAgb3Bjb2RlICAgICAgICAweDAyDQo+ ICAxUy0xUy00Uw0KPiAgIG9wY29kZSAgICAgICAgMHgzMg0KPiArIGNhdCAvc3lzL2tlcm5lbC9k ZWJ1Zy9zcGktbm9yL3NwaTAuMC9wYXJhbXMNCj4gbmFtZSAgICAgICAgICAgIChudWxsKQ0KPiBp ZCAgICAgICAgICAgICAgZWYgNzAgMTggMDAgMDAgMDANCj4gc2l6ZSAgICAgICAgICAgIDguMDAg TWlCDQoNCklzIHRoaXMgY29ycmVjdD8NClRoaXMgcGFydCBzaG91bGQgYmUgMTZNQigxMjhNYiku DQoNClRoYW5rcywNClRha2FoaXJvDQoNCg== 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 5A11BC5DF82 for ; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org Hi Miquel, > There is an ID collision with the chip of same density from the JV > family. Both chips are very similar in practice, it is mostly a matter > of electrical differences (mostly power consumption being lower). > > As a significant difference, RV chips identify themselves as supporting > the new SFDP (rev F) field which forces an alternate write SR2 > opcode (0x31). > > Signed-off-by: Miquel Raynal > --- > + cat /sys/bus/spi/devices/spi0.0/spi-nor/jedec_id > ef7018 > + cat /sys/bus/spi/devices/spi0.0/spi-nor/manufacturer > winbond > + xxd -p /sys/bus/spi/devices/spi0.0/spi-nor/sfdp > 534644500a0100ff00080117800000ffffffffffffffffffffffffffffff > ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff > ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff > ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff > ffffffffffffffffe520f9ffffffff0344eb086b083b42bbfeffffffffff > 0000ffff44eb0c200f5210d80000142a010186e114c1e96376337a757a75 > f7a2d55c39f66dffe930f880000000000000ac0000000000f7f5ffff0f00 > 0000060d44bd27ed080d > + sha256sum /sys/bus/spi/devices/spi0.0/spi-nor/sfdp > 94b52d6e903a2046e144eab0760384b6932c6fdbfec17eb7336f1778c3898daf /sys/bus/spi/devices/spi0.0/spi-nor/sfdp > + cat /sys/kernel/debug/spi-nor/spi0.0/capabilities > Supported read modes by the flash > 1S-1S-1S > opcode 0x03 > mode cycles 0 > dummy cycles 0 > 1S-1S-2S > opcode 0x3b > mode cycles 0 > dummy cycles 8 > 1S-2S-2S > opcode 0xbb > mode cycles 2 > dummy cycles 2 > 1S-1S-4S > opcode 0x6b > mode cycles 0 > dummy cycles 8 > 1S-4S-4S > opcode 0xeb > mode cycles 2 > dummy cycles 4 > 4S-4S-4S > opcode 0xeb > mode cycles 2 > dummy cycles 4 > > Supported page program modes by the flash > 1S-1S-1S > opcode 0x02 > 1S-1S-4S > opcode 0x32 > + cat /sys/kernel/debug/spi-nor/spi0.0/params > name (null) > id ef 70 18 00 00 00 > size 8.00 MiB Is this correct? This part should be 16MB(128Mb). Thanks, Takahiro ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/