From patchwork Thu Feb 7 07:57:04 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Manjunathappa, Prakash" X-Patchwork-Id: 2109681 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork2.kernel.org (Postfix) with ESMTP id DC02EDFB7B for ; Thu, 7 Feb 2013 07:59:00 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1U3MLS-0007Bm-1v; Thu, 07 Feb 2013 07:56:34 +0000 Received: from bear.ext.ti.com ([192.94.94.41]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1U3MLM-00079s-Vi for linux-arm-kernel@lists.infradead.org; Thu, 07 Feb 2013 07:56:30 +0000 Received: from dbdp20.itg.ti.com ([172.24.170.38]) by bear.ext.ti.com (8.13.7/8.13.7) with ESMTP id r177uHov012744; Thu, 7 Feb 2013 01:56:17 -0600 Received: from DBDE70.ent.ti.com (localhost [127.0.0.1]) by dbdp20.itg.ti.com (8.13.8/8.13.8) with ESMTP id r177uFvU005538; Thu, 7 Feb 2013 13:26:15 +0530 (IST) Received: from dbdp32.itg.ti.com (172.24.170.251) by dbde70.ent.ti.com (172.24.170.148) with Microsoft SMTP Server id 14.1.323.3; Thu, 7 Feb 2013 13:26:14 +0530 Received: from ucmsshproxy.india.ext.ti.com (dbdp20.itg.ti.com [172.24.170.38]) by dbdp32.itg.ti.com (8.13.8/8.13.8) with SMTP id r177uE8S000501; Thu, 7 Feb 2013 13:26:14 +0530 Received: from symphony.india.ext.ti.com (unknown [192.168.247.13]) by ucmsshproxy.india.ext.ti.com (Postfix) with ESMTP id 58BDA158002; Thu, 7 Feb 2013 13:26:14 +0530 (IST) Received: from ubuntu-psp-linux.india.ext.ti.com (ubuntu-psp-linux [192.168.247.46]) by symphony.india.ext.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id r177uER03801; Thu, 7 Feb 2013 13:26:14 +0530 (IST) From: "Manjunathappa, Prakash" To: Subject: [PATCH v2 2/3] mmc: davinci_mmc: add DT support Date: Thu, 7 Feb 2013 13:27:04 +0530 Message-ID: <1360223825-23929-3-git-send-email-prakash.pm@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1360223825-23929-1-git-send-email-prakash.pm@ti.com> References: <1360223825-23929-1-git-send-email-prakash.pm@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130207_025629_136557_E1FCF263 X-CRM114-Status: GOOD ( 20.67 ) X-Spam-Score: -4.6 (----) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-4.6 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at http://www.dnswl.org/, high trust [192.94.94.41 listed in list.dnswl.org] 3.0 KHOP_BIG_TO_CC Sent to 10+ recipients instaed of Bcc or a list -0.0 SPF_PASS SPF: sender matches SPF record -0.7 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: mporter@ti.com, davinci-linux-open-source@linux.davincidsp.com, cjb@laptop.org, linux@arm.linux.org.uk, linux-doc@vger.kernel.org, devicetree-discuss@lists.ozlabs.org, nsekhar@ti.com, linux-kernel@vger.kernel.org, rob.herring@calxeda.com, grant.likely@secretlab.ca, "Manjunathappa, Prakash" , rob@landley.net, hs@denx.de, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Adds device tree support for davinci_mmc. Also add binding documentation. Tested in non-dma PIO mode and without GPIO card_detect/write_protect option because of dependencies on EDMA and GPIO module DT support. Signed-off-by: Manjunathappa, Prakash Cc: linux-mmc@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: davinci-linux-open-source@linux.davincidsp.com Cc: devicetree-discuss@lists.ozlabs.org Cc: cjb@laptop.org Cc: Sekhar Nori Cc: mporter@ti.com --- Since v1: Modified DT parse function to take default values and accomodate controller version in compatible field. .../devicetree/bindings/mmc/davinci_mmc.txt | 30 ++++++++ drivers/mmc/host/davinci_mmc.c | 70 +++++++++++++++++++- 2 files changed, 99 insertions(+), 1 deletions(-) create mode 100644 Documentation/devicetree/bindings/mmc/davinci_mmc.txt diff --git a/Documentation/devicetree/bindings/mmc/davinci_mmc.txt b/Documentation/devicetree/bindings/mmc/davinci_mmc.txt new file mode 100644 index 0000000..6717ab1 --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/davinci_mmc.txt @@ -0,0 +1,30 @@ +* TI Highspeed MMC host controller for DaVinci + +The Highspeed MMC Host Controller on TI DaVinci family +provides an interface for MMC, SD and SDIO types of memory cards. + +This file documents the properties used by the davinci_mmc driver. + +Required properties: +- compatible: + Should be "ti,davinci-mmc-da830": for da830, da850, dm365 + Should be "ti,davinci-mmc-dm355": for dm355, dm644x + +Optional properties: +- bus-width: Number of data lines, can be <4>, or <8>, default <1> +- max-frequency: Maximum operating clock frequency, default 25MHz. +- mmc-cap-mmc-highspeed: Indicates support for MMC in high speed mode +- mmc-cap-sd-highspeed: Indicates support for SD in high speed mode + +Example: + mmc0: mmc@1c40000 { + compatible = "ti,davinci-mmc-da830", + reg = <0x40000 0x1000>; + interrupts = <16>; + status = "okay"; + bus-width = <4>; + max-frequency = <50000000>; + mmc-cap-sd-highspeed; + mmc-cap-mmc-highspeed; + }; + diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c index 27123f8..3f90316 100644 --- a/drivers/mmc/host/davinci_mmc.c +++ b/drivers/mmc/host/davinci_mmc.c @@ -34,6 +34,8 @@ #include #include #include +#include +#include #include @@ -1157,15 +1159,80 @@ static void __init init_mmcsd_host(struct mmc_davinci_host *host) mmc_davinci_reset_ctrl(host, 0); } -static int __init davinci_mmcsd_probe(struct platform_device *pdev) +static const struct of_device_id davinci_mmc_dt_ids[] = { + { + .compatible = "ti,davinci-mmc-dm355", + .data = (void *)MMC_CTLR_VERSION_1, + }, + { + .compatible = "ti,davinci-mmc-da830", + .data = (void *)MMC_CTLR_VERSION_2, + }, + {}, +}; +MODULE_DEVICE_TABLE(of, davinci_mmc_dt_ids); + +static struct davinci_mmc_config + *mmc_parse_pdata(struct platform_device *pdev) { + struct device_node *np; struct davinci_mmc_config *pdata = pdev->dev.platform_data; + const struct of_device_id *match = + of_match_device(of_match_ptr(davinci_mmc_dt_ids), &pdev->dev); + u32 data; + + np = pdev->dev.of_node; + if (!np) + return pdata; + + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) { + dev_err(&pdev->dev, "Failed to allocate memory for struct davinci_mmc_config\n"); + goto nodata; + } + + if (match->data) + pdata->version = (u8)((int)match->data); + + of_property_read_u32(np, "max-frequency", &pdata->max_freq); + if (!pdata->max_freq) + dev_info(&pdev->dev, "'max-frequency' property not specified, defaulting to 25MHz\n"); + + if (of_get_property(np, "mmc-cap-mmc-highspeed", NULL)) + pdata->caps |= MMC_CAP_MMC_HIGHSPEED; + if (of_get_property(np, "mmc-cap-sd-highspeed", NULL)) + pdata->caps |= MMC_CAP_SD_HIGHSPEED; + + of_property_read_u32(np, "bus-width", &data); + switch (data) { + case 0: + case 4: + case 8: + pdata->wires = data; + break; + default: + pdata->wires = 1; + dev_info(&pdev->dev, "Unsupported buswidth, defaulting to 1 bit\n"); + } +nodata: + return pdata; +} + +static int __init davinci_mmcsd_probe(struct platform_device *pdev) +{ + struct davinci_mmc_config *pdata = NULL; struct mmc_davinci_host *host = NULL; struct mmc_host *mmc = NULL; struct resource *r, *mem = NULL; int ret = 0, irq = 0; size_t mem_size; + pdata = mmc_parse_pdata(pdev); + if (pdata == NULL) { + dev_err(&pdev->dev, "Can not get platform data\n"); + return -ENOENT; + } + /* REVISIT: when we're fully converted, fail if pdata is NULL */ ret = -ENODEV; @@ -1408,6 +1475,7 @@ static struct platform_driver davinci_mmcsd_driver = { .name = "davinci_mmc", .owner = THIS_MODULE, .pm = davinci_mmcsd_pm_ops, + .of_match_table = of_match_ptr(davinci_mmc_dt_ids), }, .remove = __exit_p(davinci_mmcsd_remove), };