From patchwork Tue Aug 14 13:49:22 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Genoud X-Patchwork-Id: 1319471 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork2.kernel.org (Postfix) with ESMTP id 55D5EDF215 for ; Tue, 14 Aug 2012 13:56:10 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1T1HXi-00019a-RZ; Tue, 14 Aug 2012 13:52:23 +0000 Received: from mail-wg0-f49.google.com ([74.125.82.49]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1T1HVv-0000Y3-SH for linux-arm-kernel@lists.infradead.org; Tue, 14 Aug 2012 13:50:34 +0000 Received: by mail-wg0-f49.google.com with SMTP id ez12so257449wgb.18 for ; Tue, 14 Aug 2012 06:50:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; bh=CuNUe0aGpVIKoPOPtc0iM59NBQPNV5NKTc3Pn9eydeY=; b=SFbgvI5CsDTpeTmbMeI/o1Rc0zS37SXgJeQciaz8Q8m70kh/aUdu6tsuKq0AJqQXXi sUNHyaX3GCQPlffspPLKUzkaFfibeUg31vY0NFNhzGGH00tl86IGZbAyS4fzoIgl6Vd/ /Kc3BArKUaAj02ylhlEU/2zxQ9SrkuxynoLQTot6F2yrc4ByLENHJ1ylbrt9SZppbXu2 zFFjhT34SvRxnvAZgj0KgQVrK/oovd81+gsvFtlkfPa3ca2A3LwRnnS2e1rgShLRhT3F ra5r9460h9D+AvN3Zws7H1BXsIu6zymTUnPAr+CgXl8Z5yhxFT/eXkmeLk6h275QSTrU Z70Q== Received: by 10.216.36.71 with SMTP id v49mr7993273wea.70.1344952231416; Tue, 14 Aug 2012 06:50:31 -0700 (PDT) Received: from localhost.localdomain (lyon.paratronic.fr. [213.41.177.106]) by mx.google.com with ESMTPS id eu4sm22509397wib.2.2012.08.14.06.50.29 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 14 Aug 2012 06:50:30 -0700 (PDT) From: Richard Genoud To: Nicolas Ferre Subject: [PATCH 08/23] spi/atmel: add DT support Date: Tue, 14 Aug 2012 15:49:22 +0200 Message-Id: <1344952177-18385-9-git-send-email-richard.genoud@gmail.com> X-Mailer: git-send-email 1.7.2.5 In-Reply-To: <1344952177-18385-1-git-send-email-richard.genoud@gmail.com> References: <1344952177-18385-1-git-send-email-richard.genoud@gmail.com> X-Spam-Note: CRM114 invocation failed X-Spam-Score: -2.7 (--) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-2.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [74.125.82.49 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (richard.genoud[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature Cc: spi-devel-general@lists.sourceforge.net, devicetree-discuss@lists.ozlabs.org, Jean-Christophe PLAGNIOL-VILLARD , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Jean-Christophe PLAGNIOL-VILLARD The atmel_spi use only gpio for chip select. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD Cc: devicetree-discuss@lists.ozlabs.org Cc: spi-devel-general@lists.sourceforge.net --- .../devicetree/bindings/spi/spi_atmel.txt | 6 +++++ drivers/spi/spi-atmel.c | 21 ++++++++++++++++--- 2 files changed, 23 insertions(+), 4 deletions(-) create mode 100644 Documentation/devicetree/bindings/spi/spi_atmel.txt diff --git a/Documentation/devicetree/bindings/spi/spi_atmel.txt b/Documentation/devicetree/bindings/spi/spi_atmel.txt new file mode 100644 index 0000000..7ec3d8d --- /dev/null +++ b/Documentation/devicetree/bindings/spi/spi_atmel.txt @@ -0,0 +1,6 @@ +Atmel SPI device + +Required properties: +- compatible : should be "atmel,at91rm9200-spi". +- reg: Address and length of the register set for the device +- interrupts: Should contain macb interrupt diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c index 70f7bfa..ad47b6d 100644 --- a/drivers/spi/spi-atmel.c +++ b/drivers/spi/spi-atmel.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include @@ -711,7 +712,7 @@ static int atmel_spi_setup(struct spi_device *spi) u32 scbr, csr; unsigned int bits = spi->bits_per_word; unsigned long bus_hz; - unsigned int npcs_pin; + int npcs_pin; int ret; as = spi_master_get_devdata(spi->master); @@ -783,7 +784,9 @@ static int atmel_spi_setup(struct spi_device *spi) csr |= SPI_BF(DLYBCT, 0); /* chipselect must have been muxed as GPIO (e.g. in board setup) */ - npcs_pin = (unsigned int)spi->controller_data; + if (!gpio_is_valid(spi->cs_gpio)) + spi->cs_gpio = (int)spi->controller_data; + npcs_pin = spi->cs_gpio; asd = spi->controller_state; if (!asd) { asd = kzalloc(sizeof(struct atmel_spi_device), GFP_KERNEL); @@ -900,7 +903,7 @@ static void atmel_spi_cleanup(struct spi_device *spi) { struct atmel_spi *as = spi_master_get_devdata(spi->master); struct atmel_spi_device *asd = spi->controller_state; - unsigned gpio = (unsigned) spi->controller_data; + unsigned gpio = spi->cs_gpio; if (!asd) return; @@ -950,7 +953,8 @@ static int __devinit atmel_spi_probe(struct platform_device *pdev) master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; master->bus_num = pdev->id; - master->num_chipselect = 4; + master->dev.of_node = pdev->dev.of_node; + master->num_chipselect = master->dev.of_node ? 0 : 4; master->setup = atmel_spi_setup; master->transfer = atmel_spi_transfer; master->cleanup = atmel_spi_cleanup; @@ -1079,11 +1083,20 @@ static int atmel_spi_resume(struct platform_device *pdev) #define atmel_spi_resume NULL #endif +#if defined(CONFIG_OF) +static const struct of_device_id atmel_spi_dt_ids[] = { + { .compatible = "atmel,at91rm9200-spi" }, + { /* sentinel */ } +}; + +MODULE_DEVICE_TABLE(of, atmel_spi_dt_ids); +#endif static struct platform_driver atmel_spi_driver = { .driver = { .name = "atmel_spi", .owner = THIS_MODULE, + .of_match_table = of_match_ptr(atmel_spi_dt_ids), }, .suspend = atmel_spi_suspend, .resume = atmel_spi_resume,