From patchwork Fri Apr 24 14:19:24 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alban Bedel X-Patchwork-Id: 6270631 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 D81859F389 for ; Fri, 24 Apr 2015 14:21:22 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A5CEA200E6 for ; Fri, 24 Apr 2015 14:21:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 327C920377 for ; Fri, 24 Apr 2015 14:21:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753987AbbDXOUs (ORCPT ); Fri, 24 Apr 2015 10:20:48 -0400 Received: from smtpfb1-g21.free.fr ([212.27.42.9]:59008 "EHLO smtpfb1-g21.free.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755442AbbDXOUp (ORCPT ); Fri, 24 Apr 2015 10:20:45 -0400 Received: from smtp6-g21.free.fr (smtp6-g21.free.fr [212.27.42.6]) by smtpfb1-g21.free.fr (Postfix) with ESMTP id 824CF77D2A7 for ; Fri, 24 Apr 2015 16:20:41 +0200 (CEST) Received: from localhost.localdomain (unknown [85.177.202.128]) (Authenticated sender: albeu) by smtp6-g21.free.fr (Postfix) with ESMTPA id 63BEA82348; Fri, 24 Apr 2015 16:18:05 +0200 (CEST) From: Alban Bedel To: linux-spi@vger.kernel.org Cc: Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Ralf Baechle , Mark Brown , Alban Bedel , Gabor Juhos , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@linux-mips.org Subject: [PATCH 4/4] spi: spi-ath79: Set the initial state of CS0 Date: Fri, 24 Apr 2015 16:19:24 +0200 Message-Id: <1429885164-28501-5-git-send-email-albeu@free.fr> X-Mailer: git-send-email 2.0.0 In-Reply-To: <1429885164-28501-1-git-send-email-albeu@free.fr> References: <1429885164-28501-1-git-send-email-albeu@free.fr> 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,FREEMAIL_FROM, 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 The internal chip select CS0 wasn't initialized properly to work with CS HIGH chips. Signed-off-by: Alban Bedel --- drivers/spi/spi-ath79.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/spi/spi-ath79.c b/drivers/spi/spi-ath79.c index b37bedd..bf1f9b3 100644 --- a/drivers/spi/spi-ath79.c +++ b/drivers/spi/spi-ath79.c @@ -115,6 +115,7 @@ static void ath79_spi_disable(struct ath79_spi *sp) static int ath79_spi_setup_cs(struct spi_device *spi) { + struct ath79_spi *sp = ath79_spidev_to_sp(spi); int status; if (spi->chip_select && !gpio_is_valid(spi->cs_gpio)) @@ -132,6 +133,13 @@ static int ath79_spi_setup_cs(struct spi_device *spi) status = gpio_request_one(spi->cs_gpio, flags, dev_name(&spi->dev)); + } else { + if (spi->mode & SPI_CS_HIGH) + sp->ioc_base &= ~AR71XX_SPI_IOC_CS0; + else + sp->ioc_base |= AR71XX_SPI_IOC_CS0; + + ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, sp->ioc_base); } return status;