From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755533AbbCFP0b (ORCPT ); Fri, 6 Mar 2015 10:26:31 -0500 Received: from ns.mm-sol.com ([37.157.136.199]:48781 "EHLO extserv.mm-sol.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752582AbbCFP02 (ORCPT ); Fri, 6 Mar 2015 10:26:28 -0500 From: "Ivan T. Ivanov" To: Mark Brown Cc: linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org Subject: [PATCH 2/2] spi: qup: Request CS GPIO's during probe Date: Fri, 6 Mar 2015 17:26:18 +0200 Message-Id: <1425655578-22400-2-git-send-email-iivanov@mm-sol.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1425655578-22400-1-git-send-email-iivanov@mm-sol.com> References: <1425655578-22400-1-git-send-email-iivanov@mm-sol.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Ensure that driver is owner of the GPIO's used for CS signals. Signed-off-by: Ivan T. Ivanov --- drivers/spi/spi-qup.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c index 2b2c359..a07ba46 100644 --- a/drivers/spi/spi-qup.c +++ b/drivers/spi/spi-qup.c @@ -14,11 +14,13 @@ #include #include #include +#include #include #include #include #include #include +#include #include #include #include @@ -499,7 +501,7 @@ static int spi_qup_probe(struct platform_device *pdev) struct device *dev; void __iomem *base; u32 max_freq, iomode, num_cs; - int ret, irq, size; + int ret, irq, size, cs, cs_gpio; dev = &pdev->dev; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -556,6 +558,19 @@ static int spi_qup_probe(struct platform_device *pdev) else master->num_chipselect = num_cs; + for (cs = 0; cs < master->num_chipselect; cs++) { + cs_gpio = of_get_named_gpio(dev->of_node, "cs-gpios", cs); + + if (!gpio_is_valid(cs_gpio)) + continue; + + ret = devm_gpio_request(&pdev->dev, cs_gpio, "spi-qup-cs"); + if (ret) { + dev_err(&pdev->dev, "can't get cs gpios\n"); + goto error; + } + } + master->bus_num = pdev->id; master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LOOP; master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32); -- 1.9.1