From patchwork Tue Jul 17 23:14:47 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Janusz Krzysztofik X-Patchwork-Id: 10531487 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 2587C602CA for ; Wed, 18 Jul 2018 07:29:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0AB68290E5 for ; Wed, 18 Jul 2018 07:29:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F17D3290E8; Wed, 18 Jul 2018 07:29:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, FREEMAIL_FROM, MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 6D705290E5 for ; Wed, 18 Jul 2018 07:29:52 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 12B3C6E91B; Wed, 18 Jul 2018 07:28:14 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-lj1-x242.google.com (mail-lj1-x242.google.com [IPv6:2a00:1450:4864:20::242]) by gabe.freedesktop.org (Postfix) with ESMTPS id DBBD76E0FA for ; Tue, 17 Jul 2018 23:15:13 +0000 (UTC) Received: by mail-lj1-x242.google.com with SMTP id p6-v6so2408613ljc.5 for ; Tue, 17 Jul 2018 16:15:13 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=NGi/B/+juihyzO9tsJjascluThuoEUD9mrlm7kSfcLE=; b=q1HwKV9ijy4GqlMA3b+lrQBE14XdNs6Zt+uxhxAEF6NBGIUEXTNLOHDzOHPQZCESu+ 3mq3DMYdFqphTOz/+z49xs3IsSxp/v12sX/fc/iNB5Aql9PnhMzmdJpdsnRH4WKRACYV 2bDrwLCVYkIdeBBfaDoJbafiN0HI+J/7lwLzIMN5ez79s0iHXNBpESK9XUPIm84LKNzD v+GpeushLQH2Kyc5K1V8TaRyUHMYzAAYJO225jgPbtB2gBdo2JU0/esz6kc7AZ8KoRlq +7XJozl3l2/HKvtWnYTEdOopq5b+tHG752jrCCbWRL3h3gLUcJjC19S55NtXBZ906ped xDHA== X-Gm-Message-State: AOUpUlEMqrQv4NiHLj65FW2/J6BPI73xLM7MMC+60fJpBncnN1eMSDEu qnhrn9xUnO1E847J2hujrCE= X-Google-Smtp-Source: AAOMgpc5d7xSIc6N2+MJP57VZ493mTShUc6ix4hpC22G85F8fROPOkalo+myoBDO5yFSWBzEvZjqnQ== X-Received: by 2002:a2e:9447:: with SMTP id o7-v6mr2707380ljh.34.1531869312257; Tue, 17 Jul 2018 16:15:12 -0700 (PDT) Received: from z50.lan (93-181-165-181.internetia.net.pl. [93.181.165.181]) by smtp.gmail.com with ESMTPSA id n24-v6sm350827ljc.7.2018.07.17.16.15.10 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 17 Jul 2018 16:15:11 -0700 (PDT) From: Janusz Krzysztofik To: Tony Lindgren Subject: [PATCH v2 2/3 v4] mtd: rawnand: ams-delta: use GPIO lookup table Date: Wed, 18 Jul 2018 01:14:47 +0200 Message-Id: <20180717231448.14958-3-jmkrzyszt@gmail.com> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20180717231448.14958-1-jmkrzyszt@gmail.com> References: <20180518210954.29044-1-jmkrzyszt@gmail.com> <20180717231448.14958-1-jmkrzyszt@gmail.com> X-Mailman-Approved-At: Wed, 18 Jul 2018 07:28:02 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-mtd@lists.infradead.org, Miquel Raynal , Aaro Koskinen , Richard Weinberger , Gregory CLEMENT , Janusz Krzysztofik , Marek Vasut , Andy Shevchenko , Tomi Valkeinen , Shreeya Patel , Arvind Yadav , Arnd Bergmann , Bartlomiej Zolnierkiewicz , Boris Brezillon , Krzysztof Halasa , linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Brian Norris , David Woodhouse MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Now as Amstrad Delta board - the only user of this driver - provides GPIO lookup tables, switch from GPIO numbers to GPIO descriptors and use the table to locate required GPIO pins. Declare static variables for storing GPIO descriptors and replace gpio_ function calls with their gpiod_ equivalents. Pin naming used by the driver should be followed while respective GPIO lookup table is initialized by a board init code. Signed-off-by: Janusz Krzysztofik Acked-by: Boris Brezillon --- Changelog: v2: Fix handling of devm_gpiod_get_optional() return values - thanks to Andy Shevchenko v3: Remove problematic error code conversion, no longer needed if used on top of commit d08605a64e67 ("ARM: OMAP1: ams-delta: move late devices back to init_machine") already in linux-omap and commit 8853daf3b4ac ("gpiolib: Defer on non-DT find_chip_by_name() failure") already in linux-next - thanks to Boris Brezillon v4: Fix style issue - thanks to Boris Brezillon Dependency on commit 8853daf3b4ac ("gpiolib: Defer on non-DT find_chip_by_name() failure") is not critical for clean build or run, it only prevents from unexpected future changes to driver initialization order during device_initall. drivers/mtd/nand/raw/ams-delta.c | 126 +++++++++++++++++++++------------------ 1 file changed, 67 insertions(+), 59 deletions(-) diff --git a/drivers/mtd/nand/raw/ams-delta.c b/drivers/mtd/nand/raw/ams-delta.c index 37a3cc21c7bc..2a8872ebd14a 100644 --- a/drivers/mtd/nand/raw/ams-delta.c +++ b/drivers/mtd/nand/raw/ams-delta.c @@ -20,23 +20,28 @@ #include #include #include +#include #include #include #include -#include #include #include #include -#include - #include /* * MTD structure for E3 (Delta) */ static struct mtd_info *ams_delta_mtd = NULL; +static struct gpio_desc *gpiod_rdy; +static struct gpio_desc *gpiod_nce; +static struct gpio_desc *gpiod_nre; +static struct gpio_desc *gpiod_nwp; +static struct gpio_desc *gpiod_nwe; +static struct gpio_desc *gpiod_ale; +static struct gpio_desc *gpiod_cle; /* * Define partitions for flash devices @@ -70,9 +75,9 @@ static void ams_delta_write_byte(struct mtd_info *mtd, u_char byte) writew(0, io_base + OMAP_MPUIO_IO_CNTL); writew(byte, this->IO_ADDR_W); - gpio_set_value(AMS_DELTA_GPIO_PIN_NAND_NWE, 0); + gpiod_set_value(gpiod_nwe, 0); ndelay(40); - gpio_set_value(AMS_DELTA_GPIO_PIN_NAND_NWE, 1); + gpiod_set_value(gpiod_nwe, 1); } static u_char ams_delta_read_byte(struct mtd_info *mtd) @@ -81,11 +86,11 @@ static u_char ams_delta_read_byte(struct mtd_info *mtd) struct nand_chip *this = mtd_to_nand(mtd); void __iomem *io_base = (void __iomem *)nand_get_controller_data(this); - gpio_set_value(AMS_DELTA_GPIO_PIN_NAND_NRE, 0); + gpiod_set_value(gpiod_nre, 0); ndelay(40); writew(~0, io_base + OMAP_MPUIO_IO_CNTL); res = readw(this->IO_ADDR_R); - gpio_set_value(AMS_DELTA_GPIO_PIN_NAND_NRE, 1); + gpiod_set_value(gpiod_nre, 1); return res; } @@ -120,12 +125,9 @@ static void ams_delta_hwcontrol(struct mtd_info *mtd, int cmd, { if (ctrl & NAND_CTRL_CHANGE) { - gpio_set_value(AMS_DELTA_GPIO_PIN_NAND_NCE, - (ctrl & NAND_NCE) == 0); - gpio_set_value(AMS_DELTA_GPIO_PIN_NAND_CLE, - (ctrl & NAND_CLE) != 0); - gpio_set_value(AMS_DELTA_GPIO_PIN_NAND_ALE, - (ctrl & NAND_ALE) != 0); + gpiod_set_value(gpiod_nce, !(ctrl & NAND_NCE)); + gpiod_set_value(gpiod_cle, !!(ctrl & NAND_CLE)); + gpiod_set_value(gpiod_ale, !!(ctrl & NAND_ALE)); } if (cmd != NAND_CMD_NONE) @@ -134,41 +136,9 @@ static void ams_delta_hwcontrol(struct mtd_info *mtd, int cmd, static int ams_delta_nand_ready(struct mtd_info *mtd) { - return gpio_get_value(AMS_DELTA_GPIO_PIN_NAND_RB); + return gpiod_get_value(gpiod_rdy); } -static const struct gpio _mandatory_gpio[] = { - { - .gpio = AMS_DELTA_GPIO_PIN_NAND_NCE, - .flags = GPIOF_OUT_INIT_HIGH, - .label = "nand_nce", - }, - { - .gpio = AMS_DELTA_GPIO_PIN_NAND_NRE, - .flags = GPIOF_OUT_INIT_HIGH, - .label = "nand_nre", - }, - { - .gpio = AMS_DELTA_GPIO_PIN_NAND_NWP, - .flags = GPIOF_OUT_INIT_HIGH, - .label = "nand_nwp", - }, - { - .gpio = AMS_DELTA_GPIO_PIN_NAND_NWE, - .flags = GPIOF_OUT_INIT_HIGH, - .label = "nand_nwe", - }, - { - .gpio = AMS_DELTA_GPIO_PIN_NAND_ALE, - .flags = GPIOF_OUT_INIT_LOW, - .label = "nand_ale", - }, - { - .gpio = AMS_DELTA_GPIO_PIN_NAND_CLE, - .flags = GPIOF_OUT_INIT_LOW, - .label = "nand_cle", - }, -}; /* * Main initialization routine @@ -216,12 +186,17 @@ static int ams_delta_init(struct platform_device *pdev) this->write_buf = ams_delta_write_buf; this->read_buf = ams_delta_read_buf; this->cmd_ctrl = ams_delta_hwcontrol; - if (gpio_request(AMS_DELTA_GPIO_PIN_NAND_RB, "nand_rdy") == 0) { - this->dev_ready = ams_delta_nand_ready; - } else { - this->dev_ready = NULL; - pr_notice("Couldn't request gpio for Delta NAND ready.\n"); + + gpiod_rdy = devm_gpiod_get_optional(&pdev->dev, "rdy", GPIOD_IN); + if (IS_ERR(gpiod_rdy)) { + err = PTR_ERR(gpiod_rdy); + dev_warn(&pdev->dev, "RDY GPIO request failed (%d)\n", err); + goto out_mtd; } + + if (gpiod_rdy) + this->dev_ready = ams_delta_nand_ready; + /* 25 us command delay time */ this->chip_delay = 30; this->ecc.mode = NAND_ECC_SOFT; @@ -230,9 +205,47 @@ static int ams_delta_init(struct platform_device *pdev) platform_set_drvdata(pdev, io_base); /* Set chip enabled, but */ - err = gpio_request_array(_mandatory_gpio, ARRAY_SIZE(_mandatory_gpio)); - if (err) - goto out_gpio; + gpiod_nwp = devm_gpiod_get(&pdev->dev, "nwp", GPIOD_OUT_HIGH); + if (IS_ERR(gpiod_nwp)) { + err = PTR_ERR(gpiod_nwp); + dev_err(&pdev->dev, "NWP GPIO request failed (%d)\n", err); + goto out_mtd; + } + + gpiod_nce = devm_gpiod_get(&pdev->dev, "nce", GPIOD_OUT_HIGH); + if (IS_ERR(gpiod_nce)) { + err = PTR_ERR(gpiod_nce); + dev_err(&pdev->dev, "NCE GPIO request failed (%d)\n", err); + goto out_mtd; + } + + gpiod_nre = devm_gpiod_get(&pdev->dev, "nre", GPIOD_OUT_HIGH); + if (IS_ERR(gpiod_nre)) { + err = PTR_ERR(gpiod_nre); + dev_err(&pdev->dev, "NRE GPIO request failed (%d)\n", err); + goto out_mtd; + } + + gpiod_nwe = devm_gpiod_get(&pdev->dev, "nwe", GPIOD_OUT_HIGH); + if (IS_ERR(gpiod_nwe)) { + err = PTR_ERR(gpiod_nwe); + dev_err(&pdev->dev, "NWE GPIO request failed (%d)\n", err); + goto out_mtd; + } + + gpiod_ale = devm_gpiod_get(&pdev->dev, "ale", GPIOD_OUT_LOW); + if (IS_ERR(gpiod_ale)) { + err = PTR_ERR(gpiod_ale); + dev_err(&pdev->dev, "ALE GPIO request failed (%d)\n", err); + goto out_mtd; + } + + gpiod_cle = devm_gpiod_get(&pdev->dev, "cle", GPIOD_OUT_LOW); + if (IS_ERR(gpiod_cle)) { + err = PTR_ERR(gpiod_cle); + dev_err(&pdev->dev, "CLE GPIO request failed (%d)\n", err); + goto out_mtd; + } /* Scan to find existence of the device */ err = nand_scan(ams_delta_mtd, 1); @@ -246,9 +259,6 @@ static int ams_delta_init(struct platform_device *pdev) goto out; out_mtd: - gpio_free_array(_mandatory_gpio, ARRAY_SIZE(_mandatory_gpio)); -out_gpio: - gpio_free(AMS_DELTA_GPIO_PIN_NAND_RB); iounmap(io_base); out_free: kfree(this); @@ -266,8 +276,6 @@ static int ams_delta_cleanup(struct platform_device *pdev) /* Release resources, unregister device */ nand_release(ams_delta_mtd); - gpio_free_array(_mandatory_gpio, ARRAY_SIZE(_mandatory_gpio)); - gpio_free(AMS_DELTA_GPIO_PIN_NAND_RB); iounmap(io_base); /* Free the MTD device structure */