From patchwork Thu May 6 19:18:24 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pratyush Yadav X-Patchwork-Id: 12243425 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E1CD7C433ED for ; Thu, 6 May 2021 19:18:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B8F40613CE for ; Thu, 6 May 2021 19:18:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235138AbhEFTTv (ORCPT ); Thu, 6 May 2021 15:19:51 -0400 Received: from fllv0016.ext.ti.com ([198.47.19.142]:47034 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235105AbhEFTTt (ORCPT ); Thu, 6 May 2021 15:19:49 -0400 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 146JIbn9095390; Thu, 6 May 2021 14:18:37 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1620328717; bh=TFnKVuKDTO2GGB/wxF7cdWs6/1Bvz3DWxZTs5bMoFIY=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=hOLWIynym8Jyu3M2Yf8x/UcU049qO5osg/1u9l1iAz3g9I63Mv3t7Vu0JhlmsO9yG QpoyNbmuIsT6OrvEjDZrF+kBlgv/HN5R4KG2xWnvL3PH58z7RvFw61ny/wyUkc+Zzx VK1+Rjqp7uyobsjfcfL1+jlfF2vzlY0ihR6mMk6Q= Received: from DFLE106.ent.ti.com (dfle106.ent.ti.com [10.64.6.27]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 146JIbPm097453 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 6 May 2021 14:18:37 -0500 Received: from DFLE104.ent.ti.com (10.64.6.25) by DFLE106.ent.ti.com (10.64.6.27) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Thu, 6 May 2021 14:18:37 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DFLE104.ent.ti.com (10.64.6.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2 via Frontend Transport; Thu, 6 May 2021 14:18:37 -0500 Received: from pratyush-OptiPlex-790.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 146JIUND026052; Thu, 6 May 2021 14:18:34 -0500 From: Pratyush Yadav To: Tudor Ambarus , Michael Walle , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Mark Brown , , , CC: Pratyush Yadav Subject: [PATCH 1/6] mtd: spi-nor: core: use 2 data bytes for template ops Date: Fri, 7 May 2021 00:48:24 +0530 Message-ID: <20210506191829.8271-2-p.yadav@ti.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210506191829.8271-1-p.yadav@ti.com> References: <20210506191829.8271-1-p.yadav@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org The template ops used in spi_nor_spimem_check_pp() and spi_nor_spimem_check_readop() currently set the data phase to 1 byte long. This is problematic for 8D-8D-8D protocol where odd length data phase is invalid since one cycle transfers 2 bytes and odd number of bytes would mean half a cycle is left over. This could result in a controller rejecting the op as "not supported" even though it actually supports the protocol. Change the data length to 2 bytes in these templates. One might argue that this should only be done for 8D-8D-8D operations but when talking about these templates, there is no functional difference between one and two bytes, even in STR modes. Signed-off-by: Pratyush Yadav --- drivers/mtd/spi-nor/core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c index bd2c7717eb10..5cc206b8bbf3 100644 --- a/drivers/mtd/spi-nor/core.c +++ b/drivers/mtd/spi-nor/core.c @@ -2143,7 +2143,7 @@ static int spi_nor_spimem_check_readop(struct spi_nor *nor, struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(read->opcode, 0), SPI_MEM_OP_ADDR(3, 0, 0), SPI_MEM_OP_DUMMY(1, 0), - SPI_MEM_OP_DATA_IN(1, NULL, 0)); + SPI_MEM_OP_DATA_IN(2, NULL, 0)); spi_nor_spimem_setup_op(nor, &op, read->proto); @@ -2169,7 +2169,7 @@ static int spi_nor_spimem_check_pp(struct spi_nor *nor, struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(pp->opcode, 0), SPI_MEM_OP_ADDR(3, 0, 0), SPI_MEM_OP_NO_DUMMY, - SPI_MEM_OP_DATA_OUT(1, NULL, 0)); + SPI_MEM_OP_DATA_OUT(2, NULL, 0)); spi_nor_spimem_setup_op(nor, &op, pp->proto);