From patchwork Tue Oct 9 09:58:49 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bastian Hecht X-Patchwork-Id: 190252 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from merlin.infradead.org (merlin.infradead.org [IPv6:2001:4978:20e::2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 8F2152C00D8 for ; Tue, 9 Oct 2012 21:00:05 +1100 (EST) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TLWas-0001nE-GD; Tue, 09 Oct 2012 09:59:18 +0000 Received: from mail-bk0-f49.google.com ([209.85.214.49]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TLWaY-0001lD-Mf; Tue, 09 Oct 2012 09:59:00 +0000 Received: by mail-bk0-f49.google.com with SMTP id j4so2403291bkw.36 for ; Tue, 09 Oct 2012 02:58:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; bh=vhP3znLYvaAiU4P0VXgdEvN8VjRTYLsR3Ab14nTPPnA=; b=qHSP7PhmPzZ6Ll3rezm/3koXvO5s1hBV4C/QmrR+qc6+zI4TgUd8Q6MT+C4Na/JuwM UXa7+IuziDRNock+zgRzA20euya414V7gq0IiQb9dMjrmGLC8JDi54VIonfQsmO78qkn k1gPdTNn3B714X/2NuvCdkDLD4mG2IK5M0VdTOruHa32rDndLeFjQjxUZtz/v2+lW2G6 CnLd/9lmsNXU8gCaT9UOHsDq45W54VGEdYXLlRFCcSZgyodi8HNGB7rtmsztFRRq0lkd KueKRT8keLcOGBNSoGxtltelDXOYoeBM2IuwcQW2NfB1KE1DVCIhoEA98JLBpu1G9fHc UbLA== Received: by 10.204.12.195 with SMTP id y3mr6288653bky.7.1349776737402; Tue, 09 Oct 2012 02:58:57 -0700 (PDT) Received: from localhost.localdomain (p5DDC72B5.dip.t-dialin.net. [93.220.114.181]) by mx.google.com with ESMTPS id ia2sm14111341bkc.11.2012.10.09.02.58.56 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 09 Oct 2012 02:58:56 -0700 (PDT) From: Bastian Hecht To: linux-mtd@lists.infradead.org Subject: [PATCH v2 2/2] mtd: sh_flctl: Add device tree support Date: Tue, 9 Oct 2012 11:58:49 +0200 Message-Id: <1349776729-9311-3-git-send-email-hechtb@gmail.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1349776729-9311-1-git-send-email-hechtb@gmail.com> References: <1349776729-9311-1-git-send-email-hechtb@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 [209.85.214.49 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (hechtb[at]googlemail.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: Vikram Narayanan , Magnus Damm , Guennadi Liakhovetski , linux-arm-kernel@lists.infradead.org, linux-sh@vger.kernel.org X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-mtd-bounces@lists.infradead.org Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org The flctl can now be probed via device tree setup in addition to the existing platform data way. SoC specific setup data is set in the .data member of the OF match, so kept within the driver itself, while board/user specific setup - like partitioning - is taken from the device tree. Actual configuration is added for the SoC sh7372. Signed-off-by: Bastian Hecht --- v2: added dmas and dma-names fields to the bindings. These are not used yet but are added for completing the bindings and will be needed later. .../devicetree/bindings/mtd/flctl-nand.txt | 49 +++++++++++ drivers/mtd/nand/sh_flctl.c | 92 ++++++++++++++++++-- 2 files changed, 134 insertions(+), 7 deletions(-) create mode 100644 Documentation/devicetree/bindings/mtd/flctl-nand.txt diff --git a/Documentation/devicetree/bindings/mtd/flctl-nand.txt b/Documentation/devicetree/bindings/mtd/flctl-nand.txt new file mode 100644 index 0000000..427f46d --- /dev/null +++ b/Documentation/devicetree/bindings/mtd/flctl-nand.txt @@ -0,0 +1,49 @@ +FLCTL NAND controller + +Required properties: +- compatible : "renesas,shmobile-flctl-sh7372" +- reg : Address range of the FLCTL +- interrupts : flste IRQ number +- nand-bus-width : bus width to NAND chip + +Optional properties: +- dmas: DMA specifier(s) +- dma-names: name for each DMA specifier. Valid names are + "data_tx", "data_rx", "ecc_tx", "ecc_rx" + +The DMA fields are not used yet in the driver but are listed here for +completing the bindings. + +The device tree may optionally contain sub-nodes describing partitions of the +address space. See partition.txt for more detail. + +Example: + + flctl@e6a30000 { + #address-cells = <1>; + #size-cells = <1>; + compatible = "renesas,shmobile-flctl-sh7372"; + reg = <0xe6a30000 0x100>; + interrupts = <0x0d80>; + + nand-bus-width = <16>; + + dmas = <&dmac 1 /* data_tx */ + &dmac 2;> /* data_rx */ + dma-names = "data_tx", "data_rx"; + + system@0 { + label = "system"; + reg = <0x0 0x8000000>; + }; + + userdata@8000000 { + label = "userdata"; + reg = <0x8000000 0x10000000>; + }; + + cache@18000000 { + label = "cache"; + reg = <0x18000000 0x8000000>; + }; + }; diff --git a/drivers/mtd/nand/sh_flctl.c b/drivers/mtd/nand/sh_flctl.c index 1105fbb..02ff9d1 100644 --- a/drivers/mtd/nand/sh_flctl.c +++ b/drivers/mtd/nand/sh_flctl.c @@ -29,6 +29,9 @@ #include #include #include +#include +#include +#include #include #include #include @@ -1021,6 +1024,73 @@ static irqreturn_t flctl_handle_flste(int irq, void *dev_id) return IRQ_HANDLED; } +#ifdef CONFIG_OF +struct flctl_soc_config { + unsigned long flcmncr_val; + unsigned has_hwecc:1; + unsigned use_holden:1; +}; + +static struct flctl_soc_config flctl_sh7372_config = { + .flcmncr_val = CLK_16B_12L_4H | TYPESEL_SET | SHBUSSEL, + .has_hwecc = 1, + .use_holden = 1, +}; + +static const struct of_device_id of_flctl_match[] = { + { .compatible = "renesas,shmobile-flctl-sh7372", + .data = &flctl_sh7372_config }, + {}, +}; +MODULE_DEVICE_TABLE(of, of_flctl_match); + +static struct sh_flctl_platform_data *flctl_parse_dt(struct device *dev) +{ + const struct of_device_id *match; + struct flctl_soc_config *config; + struct sh_flctl_platform_data *pdata; + struct device_node *dn = dev->of_node; + int ret; + + match = of_match_device(of_flctl_match, dev); + if (match) + config = (struct flctl_soc_config *)match->data; + else { + dev_err(dev, "%s: no OF configuration attached\n", __func__); + return NULL; + } + + pdata = devm_kzalloc(dev, sizeof(struct sh_flctl_platform_data), + GFP_KERNEL); + if (!pdata) { + dev_err(dev, "%s: failed to allocate config data\n", __func__); + return NULL; + } + + /* set SoC specific options */ + pdata->flcmncr_val = config->flcmncr_val; + pdata->has_hwecc = config->has_hwecc; + pdata->use_holden = config->use_holden; + + /* parse user defined options */ + ret = of_get_nand_bus_width(dn); + if (ret == 16) + pdata->flcmncr_val |= SEL_16BIT; + else if (ret != 8) { + dev_err(dev, "%s: invalid bus width\n", __func__); + return NULL; + } + + return pdata; +} +#else /* CONFIG_OF */ +#define of_flctl_match NULL +static struct sh_flctl_platform_data *flctl_parse_dt(struct device *dev) +{ + return NULL; +} +#endif /* CONFIG_OF */ + static int __devinit flctl_probe(struct platform_device *pdev) { struct resource *res; @@ -1030,12 +1100,7 @@ static int __devinit flctl_probe(struct platform_device *pdev) struct sh_flctl_platform_data *pdata; int ret = -ENXIO; int irq; - - pdata = pdev->dev.platform_data; - if (pdata == NULL) { - dev_err(&pdev->dev, "no platform data defined\n"); - return -EINVAL; - } + struct mtd_part_parser_data ppdata = {}; flctl = kzalloc(sizeof(struct sh_flctl), GFP_KERNEL); if (!flctl) { @@ -1067,6 +1132,16 @@ static int __devinit flctl_probe(struct platform_device *pdev) goto err_flste; } + if (pdev->dev.of_node) + pdata = flctl_parse_dt(&pdev->dev); + else + pdata = pdev->dev.platform_data; + + if (!pdata) { + dev_err(&pdev->dev, "no setup data defined\n"); + return -EINVAL; + } + platform_set_drvdata(pdev, flctl); flctl_mtd = &flctl->mtd; nand = &flctl->chip; @@ -1109,7 +1184,9 @@ static int __devinit flctl_probe(struct platform_device *pdev) if (ret) goto err_chip; - mtd_device_register(flctl_mtd, pdata->parts, pdata->nr_parts); + ppdata.of_node = pdev->dev.of_node; + ret = mtd_device_parse_register(flctl_mtd, NULL, &ppdata, pdata->parts, + pdata->nr_parts); return 0; @@ -1143,6 +1220,7 @@ static struct platform_driver flctl_driver = { .driver = { .name = "sh_flctl", .owner = THIS_MODULE, + .of_match_table = of_flctl_match, }, };