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 X-Spam-Level: X-Spam-Status: No, score=-8.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED, 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 92D86C65BAE for ; Fri, 14 Dec 2018 02:15:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5C7612080F for ; Fri, 14 Dec 2018 02:15:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5C7612080F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729042AbeLNCP1 (ORCPT ); Thu, 13 Dec 2018 21:15:27 -0500 Received: from mga12.intel.com ([192.55.52.136]:22645 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727901AbeLNCP0 (ORCPT ); Thu, 13 Dec 2018 21:15:26 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 13 Dec 2018 18:15:26 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,351,1539673200"; d="scan'208";a="118451011" Received: from unknown (HELO dev03.ndswc.sj.intel.com) ([10.233.132.114]) by FMSMGA003.fm.intel.com with ESMTP; 13 Dec 2018 18:15:26 -0800 From: Purna Chandra Mandal To: Fred Bloggs , Boris Brezillon Cc: Purna Chandra Mandal , linux-kernel@vger.kernel.org, Marek Vasut , Brian Norris , Richard Weinberger , linux-mtd@lists.infradead.org, David Woodhouse Subject: [PATCH] mtd: spi-nor: cadence-quadspi: write upto 8-bytes data in STIG mode Date: Thu, 13 Dec 2018 18:15:16 -0800 Message-Id: <20181214021516.43609-1-purna.chandra.mandal@intel.com> X-Mailer: git-send-email 2.13.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org cadence-quadspi controller allows upto eight bytes of data to be transferred in software Triggered Instruction generator (STIG) mode of operation. Lower 4 bytes are written through writedatalower and upper 4 bytes by writedataupper register. This patch allows all the 8 bytes to be written. Signed-off-by: Purna Chandra Mandal --- drivers/mtd/spi-nor/cadence-quadspi.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/spi-nor/cadence-quadspi.c b/drivers/mtd/spi-nor/cadence-quadspi.c index 04cedd3a2bf6..990934387fea 100644 --- a/drivers/mtd/spi-nor/cadence-quadspi.c +++ b/drivers/mtd/spi-nor/cadence-quadspi.c @@ -420,7 +420,7 @@ static int cqspi_command_write(struct spi_nor *nor, const u8 opcode, unsigned int data; int ret; - if (n_tx > 4 || (n_tx && !txbuf)) { + if (n_tx > CQSPI_STIG_DATA_LEN_MAX || (n_tx && !txbuf)) { dev_err(nor->dev, "Invalid input argument, cmdlen %d txbuf 0x%p\n", n_tx, txbuf); @@ -435,8 +435,13 @@ static int cqspi_command_write(struct spi_nor *nor, const u8 opcode, data = 0; memcpy(&data, txbuf, n_tx); writel(data, reg_base + CQSPI_REG_CMDWRITEDATALOWER); - } + if (n_tx > 4) { + data = 0; + memcpy(&data, txbuf + 4, n_tx - 4); + writel(data, reg_base + CQSPI_REG_CMDWRITEDATAUPPER); + } + } ret = cqspi_exec_flash_cmd(cqspi, reg); return ret; } -- 2.13.0