From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?q?Pawe=C5=82=20Chmiel?= Subject: [PATCH 3/5] mtd: onenand/samsung: Add device tree support Date: Fri, 26 Apr 2019 18:42:22 +0200 Message-ID: <20190426164224.11327-4-pawel.mikolaj.chmiel@gmail.com> References: <20190426164224.11327-1-pawel.mikolaj.chmiel@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20190426164224.11327-1-pawel.mikolaj.chmiel@gmail.com> Sender: linux-kernel-owner@vger.kernel.org To: kyungmin.park@samsung.com Cc: bbrezillon@kernel.org, miquel.raynal@bootlin.com, richard@nod.at, dwmw2@infradead.org, computersforpeace@gmail.com, marek.vasut@gmail.com, robh+dt@kernel.org, mark.rutland@arm.com, linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Tomasz Figa , =?UTF-8?q?Pawe=C5=82=20Chmiel?= List-Id: devicetree@vger.kernel.org From: Tomasz Figa This patch adds support for instantation using Device Tree. Signed-off-by: Tomasz Figa Signed-off-by: Paweł Chmiel --- drivers/mtd/nand/onenand/samsung.c | 37 +++++++++++++++++++++++++++++- 1 file changed, 36 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/nand/onenand/samsung.c b/drivers/mtd/nand/onenand/samsung.c index 9628bf5bc397..0f450604412f 100644 --- a/drivers/mtd/nand/onenand/samsung.c +++ b/drivers/mtd/nand/onenand/samsung.c @@ -25,6 +25,7 @@ #include #include #include +#include #include "samsung.h" @@ -835,8 +836,36 @@ static void s3c_onenand_setup(struct mtd_info *mtd) this->write_bufferram = onenand_write_bufferram; } +#ifdef CONFIG_OF +static const struct of_device_id s3c_onenand_of_match[] = { + { .compatible = "samsung,s3c6400-onenand", + .data = (void *)TYPE_S3C6400 }, + { .compatible = "samsung,s3c6410-onenand", + .data = (void *)TYPE_S3C6410 }, + { .compatible = "samsung,s5pv210-onenand", + .data = (void *)TYPE_S5PC110 }, + {}, +}; +MODULE_DEVICE_TABLE(of, onenand_s3c_dt_match); +#endif + +static enum soc_type s3c_onenand_get_device_id(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + + if (IS_ENABLED(CONFIG_OF) && np) { + const struct of_device_id *match; + + match = of_match_node(s3c_onenand_of_match, np); + return (enum soc_type)match->data; + } + + return platform_get_device_id(pdev)->driver_data; +} + static int s3c_onenand_probe(struct platform_device *pdev) { + struct device_node *np = pdev->dev.of_node; struct onenand_platform_data *pdata; struct onenand_chip *this; struct mtd_info *mtd; @@ -858,9 +887,10 @@ static int s3c_onenand_probe(struct platform_device *pdev) this = (struct onenand_chip *) &mtd[1]; mtd->priv = this; + mtd->dev.of_node = np; mtd->dev.parent = &pdev->dev; onenand->pdev = pdev; - onenand->type = platform_get_device_id(pdev)->driver_data; + onenand->type = s3c_onenand_get_device_id(pdev); s3c_onenand_setup(mtd); @@ -919,6 +949,10 @@ static int s3c_onenand_probe(struct platform_device *pdev) } onenand->clk_bus = devm_clk_get(&pdev->dev, "bus"); + if (np && IS_ERR(onenand->clk_bus)) { + dev_err(&pdev->dev, "failed to get bus clock\n"); + return PTR_ERR(onenand->clk_bus); + } if (!IS_ERR(onenand->clk_bus)) clk_prepare_enable(onenand->clk_bus); @@ -1000,6 +1034,7 @@ static struct platform_driver s3c_onenand_driver = { .driver = { .name = "samsung-onenand", .pm = &s3c_pm_ops, + .of_match_table = of_match_ptr(s3c_onenand_of_match), }, .id_table = s3c_onenand_driver_ids, .probe = s3c_onenand_probe, -- 2.20.1