From patchwork Tue Sep 15 13:26:16 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jarkko Nikula X-Patchwork-Id: 7184891 Return-Path: X-Original-To: patchwork-linux-spi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 7172E9F380 for ; Tue, 15 Sep 2015 13:27:15 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id AB2B7206A5 for ; Tue, 15 Sep 2015 13:27:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0F154206DD for ; Tue, 15 Sep 2015 13:27:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752426AbbION1L (ORCPT ); Tue, 15 Sep 2015 09:27:11 -0400 Received: from mga03.intel.com ([134.134.136.65]:27922 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752461AbbION1L (ORCPT ); Tue, 15 Sep 2015 09:27:11 -0400 Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga103.jf.intel.com with ESMTP; 15 Sep 2015 06:26:45 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,536,1437462000"; d="scan'208";a="804826235" Received: from mylly.fi.intel.com (HELO mylly.fi.intel.com.) ([10.237.72.68]) by orsmga002.jf.intel.com with ESMTP; 15 Sep 2015 06:26:42 -0700 From: Jarkko Nikula To: linux-spi@vger.kernel.org Cc: Mark Brown , Nicolas Ferre , Daniel Mack , Haojian Zhuang , Robert Jarzmik , Kukjin Kim , Krzysztof Kozlowski , Jarkko Nikula Subject: [PATCH 04/16] spi: bfin-sport: Calculate transfer speed unconditionally Date: Tue, 15 Sep 2015 16:26:16 +0300 Message-Id: <1442323588-29642-4-git-send-email-jarkko.nikula@linux.intel.com> X-Mailer: git-send-email 2.5.1 In-Reply-To: <1442323588-29642-1-git-send-email-jarkko.nikula@linux.intel.com> References: <1442323588-29642-1-git-send-email-jarkko.nikula@linux.intel.com> Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable 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 SPI core validates the transfer speed and defaults to spi->max_speed_hz in case the transfer speed is not set so code here won't use the chip->baud value (which is derived from spi->max_speed_hz). Please note driver uses chip->baud at the beginning of message transmission by calling the bfin_sport_spi_restore_state() but then programs per transfer speed in bfin_sport_spi_pump_transfers(). I'm not familiar with the HW so I don't know would it be possible to remove chip->baud completely by either using constant value in bfin_sport_spi_restore_state() or by removing the tclkdiv register write there. Signed-off-by: Jarkko Nikula --- drivers/spi/spi-bfin-sport.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/drivers/spi/spi-bfin-sport.c b/drivers/spi/spi-bfin-sport.c index a78693189f45..6c967555a56a 100644 --- a/drivers/spi/spi-bfin-sport.c +++ b/drivers/spi/spi-bfin-sport.c @@ -352,10 +352,7 @@ bfin_sport_spi_pump_transfers(unsigned long data) transfer = drv_data->cur_transfer; chip = drv_data->cur_chip; - if (transfer->speed_hz) - transfer_speed = bfin_sport_hz_to_spi_baud(transfer->speed_hz); - else - transfer_speed = chip->baud; + transfer_speed = bfin_sport_hz_to_spi_baud(transfer->speed_hz); bfin_write(&drv_data->regs->tclkdiv, transfer_speed); SSYNC();