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Tue, 15 Jul 2014 21:25:19 +0900 (KST) From: Naveen Krishna Chatradhi To: linux-arm-kernel@lists.infradead.org, spi-devel-general@lists.sourceforge.net, linux-samsung-soc@vger.kernel.org Subject: [PATCH 1/3] spi: s3c64xx: move "cs-gpio" from subnode to SPI DT node Date: Tue, 15 Jul 2014 17:50:58 +0530 Message-id: <1405426860-18404-2-git-send-email-ch.naveen@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1405426860-18404-1-git-send-email-ch.naveen@samsung.com> References: <1405426860-18404-1-git-send-email-ch.naveen@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrKIsWRmVeSWpSXmKPExsWyRsSkRne97NFgg64GdYupD5+wWbw8pGkx /8g5Vouzyw6yWbw6s5HNYvKm+4wWR38XWPQuuMpmsenxNVaLGef3MVks2vaf2eLIlEZ2i/Uz XrM48HrMbrjI4vH3+XUWj52z7rJ7bFrVyeZx59oeNo/NS+o9di/4zOTRt2UVo8fPlzoenzfJ BXBFcdmkpOZklqUW6dslcGX8vrmZraBJseLW3CbmBsbHUl2MnBwSAiYSDw/eZYOwxSQu3FsP ZHNxCAksZZQ43fSSvYuRA6yoZZ8FRHwRo8TP/4dZQRqEBPqZJBY35oDYbAJmEgcXrQarFxEo k5g3oQ6knllgN5PE5bNPwRYIC/hKfN29kBGkhkVAVeL6SWuQMK+Aq8Sl7VNYIFYpSMyZZANi cgq4SbQ+9YZY5Cox9UwrI8hECYGX7BItL5cwgSRYBAQkvk0+BNUqK7HpADPEJ5ISB1fcYJnA KLyAkWEVo2hqQXJBcVJ6kalecWJucWleul5yfu4mRmAUnf73bOIOxvsHrA8xJgONm8gsJZqc D4zCvJJ4Q2MzIwtTE1NjI3NLM9KElcR50x8lBQkJpCeWpGanphakFsUXleakFh9iZOLglGpg ZF58+I78n0k7xM2Scq6dfNXinvClTeB8xF/dX72OsUe0XDc6bbPl3nNbd8Lki6IPVtrX7BL7 vUpVQuyfH99+1ifzt72bGbnHuN9l9vNjp0JC0w99MVwmKbl0naE33yueBN0LjZ9vrksRSw90 8c59Ij9LapLLLmvFTU57RXjnXv9XoxrmcfrnFSWW4oxEQy3mouJEANiULEy4AgAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrCIsWRmVeSWpSXmKPExsVy+t9jAd31skeDDSZvkbWY+vAJm8XLQ5oW 84+cY7U4u+wgm8WrMxvZLCZvus9ocfR3gUXvgqtsFpseX2O1mHF+H5PFom3/mS2OTGlkt1g/ 4zWLA6/H7IaLLB5/n19n8dg56y67x6ZVnWwed67tYfPYvKTeY/eCz0wefVtWMXr8fKnj8XmT XABXVAOjTUZqYkpqkUJqXnJ+SmZeuq2Sd3C8c7ypmYGhrqGlhbmSQl5ibqqtkotPgK5bZg7Q 6UoKZYk5pUChgMTiYiV9O0wTQkPcdC1gGiN0fUOC4HqMDNBAwhrGjN83N7MVNClW3JrbxNzA +Fiqi5GDQ0LARKJln0UXIyeQKSZx4d56ti5GLg4hgUWMEj//H2YFSQgJ9DNJLG7MAbHZBMwk Di5azQ7SKyJQJjFvQh1IPbPAbiaJy2efsoHUCAv4SnzdvZARpIZFQFXi+klrkDCvgKvEpe1T WCDWKkjMmWQDYnIKuEm0PvWGWOQqMfVMK+MERt4FjAyrGEVTC5ILipPScw31ihNzi0vz0vWS 83M3MYJj9JnUDsaVDRaHGAU4GJV4eCXeHQ4WYk0sK67MPcQowcGsJMJb/+9IsBBvSmJlVWpR fnxRaU5q8SFGU6CTJjJLiSbnA9NHXkm8obGJuamxqaWJhYmZpZI474FW60AhgfTEktTs1NSC 1CKYPiYOTqkGRu2I85zK188GX1Cvtz0S9as4ab3g9U8WQQn2N/4GmxSvkX0/acKCJ4Fum0U6 uZp/X5S9Mn/ha49Km+CspSb1haVZzKqi334kZx69uDD8gcyX7ey/jfeULhdIerlFt2/Xx/bK nO3XNy/uNPbOP2Wgb6KzT878zdvZB5wqbyvnTxLZoMjRrbvsphJLcUaioRZzUXEiANTJyuvn AgAA DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140715_052543_299864_CCFA58A6 X-CRM114-Status: GOOD ( 16.29 ) X-Spam-Score: -5.0 (-----) Cc: devicetree@vger.kernel.org, kgene.kim@samsung.com, Tomasz Figa , Doug Anderson , grant.likely@secretlab.ca, jaswinder.singh@linaro.org, broonie@kernel.org, cpgs@samsung.com, naveenkrishna.ch@gmail.com, Javier Martinez Canillas X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,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 This patch modifies the spi-s3c64xx.c driver to fetch the Chip select or Slave select gpio line property "cs-gpios" from SPI node instead of "controller_data" subnode. Rename the property "cs-gpio" to "cs-gpios" in accordance with the SPI core. Such that s3c64xx.c can use spi->cs_gpio instead of parsing the property in the driver. Update the dt-bindings ion spi/spi-samsung.txt Signed-off-by: Naveen Krishna Chatradhi Acked-by: Rob Herring Cc: Javier Martinez Canillas Cc: Doug Anderson Cc: Tomasz Figa --- This patch is a rework of the change @ http://www.mail-archive.com/devicetree@vger.kernel.org/msg34500.html I'm not sure if i can carry forward the other Signed-offs and Tested-bys .../devicetree/bindings/spi/spi-samsung.txt | 10 +++++----- drivers/spi/spi-s3c64xx.c | 18 ++++++++---------- 2 files changed, 13 insertions(+), 15 deletions(-) diff --git a/Documentation/devicetree/bindings/spi/spi-samsung.txt b/Documentation/devicetree/bindings/spi/spi-samsung.txt index 655b665..ff3c4c9 100644 --- a/Documentation/devicetree/bindings/spi/spi-samsung.txt +++ b/Documentation/devicetree/bindings/spi/spi-samsung.txt @@ -39,15 +39,15 @@ Optional Board Specific Properties: - num-cs: Specifies the number of chip select lines supported. If not specified, the default number of chip select lines is set to 1. +- cs-gpios: A gpio specifier that specifies the gpio line used as + the slave select line by the spi controller. The format of the gpio + specifier depends on the gpio controller (Also read spi-bus.txt). + SPI Controller specific data in SPI slave nodes: - The spi slave nodes should provide the following information which is required by the spi controller. - - cs-gpio: A gpio specifier that specifies the gpio line used as - the slave select line by the spi controller. The format of the gpio - specifier depends on the gpio controller. - - samsung,spi-feedback-delay: The sampling phase shift to be applied on the miso line (to account for any lag in the miso line). The following are the valid values. @@ -85,6 +85,7 @@ Example: #size-cells = <0>; pinctrl-names = "default"; pinctrl-0 = <&spi0_bus>; + cs-gpios = <&gpa2 5 1 0 3>; w25q80bw@0 { #address-cells = <1>; @@ -94,7 +95,6 @@ Example: spi-max-frequency = <10000>; controller-data { - cs-gpio = <&gpa2 5 1 0 3>; samsung,spi-feedback-delay = <0>; }; diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index 75a5696..72bfba6 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -764,12 +764,6 @@ static struct s3c64xx_spi_csinfo *s3c64xx_get_slave_ctrldata( return ERR_PTR(-EINVAL); } - data_np = of_get_child_by_name(slave_np, "controller-data"); - if (!data_np) { - dev_err(&spi->dev, "child node 'controller-data' not found\n"); - return ERR_PTR(-EINVAL); - } - cs = kzalloc(sizeof(*cs), GFP_KERNEL); if (!cs) { of_node_put(data_np); @@ -777,13 +771,17 @@ static struct s3c64xx_spi_csinfo *s3c64xx_get_slave_ctrldata( } /* The CS line is asserted/deasserted by the gpio pin */ - if (sdd->cs_gpio) - cs->line = of_get_named_gpio(data_np, "cs-gpio", 0); + cs->line = spi->cs_gpio; if (!gpio_is_valid(cs->line)) { dev_err(&spi->dev, "chip select gpio is not specified or invalid\n"); kfree(cs); - of_node_put(data_np); + return ERR_PTR(-EINVAL); + } + + data_np = of_get_child_by_name(slave_np, "controller-data"); + if (!data_np) { + dev_err(&spi->dev, "child node 'controller-data' not found\n"); return ERR_PTR(-EINVAL); } @@ -1077,7 +1075,7 @@ static int s3c64xx_spi_probe(struct platform_device *pdev) sdd->sfr_start = mem_res->start; sdd->cs_gpio = true; if (pdev->dev.of_node) { - if (!of_find_property(pdev->dev.of_node, "cs-gpio", NULL)) + if (!of_find_property(pdev->dev.of_node, "cs-gpios", NULL)) sdd->cs_gpio = false; ret = of_alias_get_id(pdev->dev.of_node, "spi");