From patchwork Wed Jan 4 06:26:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dhruva Gole X-Patchwork-Id: 640019 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C7554C4332F for ; Wed, 4 Jan 2023 06:27:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233513AbjADG1z (ORCPT ); Wed, 4 Jan 2023 01:27:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42944 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233126AbjADG1f (ORCPT ); Wed, 4 Jan 2023 01:27:35 -0500 Received: from lelv0143.ext.ti.com (lelv0143.ext.ti.com [198.47.23.248]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C62D91A224; Tue, 3 Jan 2023 22:26:45 -0800 (PST) Received: from lelv0266.itg.ti.com ([10.180.67.225]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id 3046QM1J054819; Wed, 4 Jan 2023 00:26:22 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1672813582; bh=50kwzeglqLbLMm3hsB8pVB3cbz/k2cqY2lSOghSdHi0=; h=From:To:CC:Subject:Date; b=XshEnZoIwSAV2ogPAWiDkr4AE/Cew8HetGElgh2WroqgFcrcGtN+ZohAFswf7HVIJ c31wNmb2oswu4tOTtzZLPCxJPD8RHwiPAukAYmA8GaoNpIic+Qu2ZtsFkrrOthuxOx /Ky/NsW0uL+pqngVdd3whvTtLofp6yTHZUYYTegA= Received: from DFLE109.ent.ti.com (dfle109.ent.ti.com [10.64.6.30]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 3046QMkI104557 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 4 Jan 2023 00:26:22 -0600 Received: from DFLE104.ent.ti.com (10.64.6.25) by DFLE109.ent.ti.com (10.64.6.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.16; Wed, 4 Jan 2023 00:26:22 -0600 Received: from fllv0040.itg.ti.com (10.64.41.20) 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 15.1.2507.16 via Frontend Transport; Wed, 4 Jan 2023 00:26:22 -0600 Received: from localhost (ileaxei01-snat2.itg.ti.com [10.180.69.6]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 3046QLJt047826; Wed, 4 Jan 2023 00:26:21 -0600 From: Dhruva Gole To: CC: Dhruva Gole , , , Vignesh , Pratyush Yadav , Vaishnav Achath Subject: [PATCH 0/2] spi: cqspi: Fix register reads in STIG Mode Date: Wed, 4 Jan 2023 11:56:02 +0530 Message-ID: <20230104062604.1556763-1-d-gole@ti.com> X-Mailer: git-send-email 2.25.1 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 Intent of these patches is to fix register reads in STIG mode and also use STIG mode while reading flash registers. Currently if you try to read a register while in STIG mode there is no support for ADDR and thus naturally a register never gets read from the flash. Logs demonstrating the usage and working of QSPI-NOR Flash (Cypress s25hs512t) on a modified AM625 SK EVM can be found on the link below: https://gist.github.com/DhruvaG2000/a9b90d3d9c60edd3b2d8a360d869a00b A series very similar to this was also sent to u-boot and the latest revision can be viewed here: [PATCH V4 0/2] spi: cqspi: Fix register reads in STIG Mode https://lore.kernel.org/u-boot/20230103063112.1165898-1-d-gole@ti.com/ Dhruva Gole (2): spi: cadence-quadspi: setup ADDR Bits in cmd reads spi: cadence-quadspi: use STIG mode for small reads drivers/spi/spi-cadence-quadspi.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-)