From patchwork Tue Sep 2 09:02:34 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Barry Song X-Patchwork-Id: 4823701 Return-Path: X-Original-To: patchwork-linux-spi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 792BAC0338 for ; Tue, 2 Sep 2014 09:03:46 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 545AB20160 for ; Tue, 2 Sep 2014 09:03:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7652920154 for ; Tue, 2 Sep 2014 09:03:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752272AbaIBJDe (ORCPT ); Tue, 2 Sep 2014 05:03:34 -0400 Received: from cluster-d.mailcontrol.com ([85.115.60.190]:45347 "EHLO cluster-d.mailcontrol.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751231AbaIBJDe (ORCPT ); Tue, 2 Sep 2014 05:03:34 -0400 Received: from shaapppus01.asia.root.pri ([210.13.83.99]) by rly48d.srv.mailcontrol.com (MailControl) with ESMTP id s8292h2R029620 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NO); Tue, 2 Sep 2014 10:02:47 +0100 Received: from SHAASIEXC01.ASIA.ROOT.PRI ([10.125.12.102]) by shaapppus01.asia.root.pri (PGP Universal service); Tue, 02 Sep 2014 17:02:48 +0800 X-PGP-Universal: processed; by shaapppus01.asia.root.pri on Tue, 02 Sep 2014 17:02:48 +0800 Received: from barry-laptop.ROOT.PRI (10.125.5.73) by asimail.csr.com (10.125.12.88) with Microsoft SMTP Server (TLS) id 14.3.174.1; Tue, 2 Sep 2014 17:02:41 +0800 From: Barry Song To: , CC: , , Qipan Li , Barry Song Subject: [PATCH 5/8] spi: sirf: add fifo reset/start for cmd transfer Date: Tue, 2 Sep 2014 17:02:34 +0800 Message-ID: <1409648557-5470-1-git-send-email-Barry.Song@csr.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-Originating-IP: [10.125.5.73] X-CFilter-Loop: Reflected X-Scanned-By: MailControl 33066.168 (www.mailcontrol.com) on 10.68.0.158 Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Spam-Status: No, score=-8.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Qipan Li for command mode spi transfer, HW spec requires to do fifo reset work to clear FIFO status. Signed-off-by: Qipan Li Signed-off-by: Barry Song --- drivers/spi/spi-sirf.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/spi/spi-sirf.c b/drivers/spi/spi-sirf.c index 93376a2..7499076 100644 --- a/drivers/spi/spi-sirf.c +++ b/drivers/spi/spi-sirf.c @@ -311,6 +311,8 @@ static void spi_sirfsoc_cmd_transfer(struct spi_device *spi, u32 cmd; sspi = spi_master_get_devdata(spi->master); + writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + SIRFSOC_SPI_TXFIFO_OP); + writel(SIRFSOC_SPI_FIFO_START, sspi->base + SIRFSOC_SPI_TXFIFO_OP); memcpy(&cmd, sspi->tx, t->len); if (sspi->word_width == 1 && !(spi->mode & SPI_LSB_FIRST)) cmd = cpu_to_be32(cmd) >>