From patchwork Wed Jul 6 16:47:50 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shawn Guo X-Patchwork-Id: 2491 Return-Path: X-Original-To: patchwork@peony.canonical.com Delivered-To: patchwork@peony.canonical.com Received: from fiordland.canonical.com (fiordland.canonical.com [91.189.94.145]) by peony.canonical.com (Postfix) with ESMTP id 3F6D32413B for ; Wed, 6 Jul 2011 16:42:27 +0000 (UTC) Received: from mail-qy0-f180.google.com (mail-qy0-f180.google.com [209.85.216.180]) by fiordland.canonical.com (Postfix) with ESMTP id EBFE8A18AC1 for ; Wed, 6 Jul 2011 16:42:26 +0000 (UTC) Received: by qyk30 with SMTP id 30so82325qyk.11 for ; Wed, 06 Jul 2011 09:42:26 -0700 (PDT) Received: by 10.229.62.194 with SMTP id y2mr6749028qch.4.1309970546404; Wed, 06 Jul 2011 09:42:26 -0700 (PDT) X-Forwarded-To: linaro-patchwork@canonical.com X-Forwarded-For: patch@linaro.org linaro-patchwork@canonical.com Delivered-To: patches@linaro.org Received: by 10.229.48.135 with SMTP id r7cs84197qcf; Wed, 6 Jul 2011 09:42:26 -0700 (PDT) Received: by 10.224.175.211 with SMTP id bb19mr6154079qab.95.1309970546052; Wed, 06 Jul 2011 09:42:26 -0700 (PDT) Received: from CH1EHSOBE011.bigfish.com (ch1ehsobe003.messaging.microsoft.com [216.32.181.183]) by mx.google.com with ESMTPS id i4si378114qcb.84.2011.07.06.09.42.25 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 06 Jul 2011 09:42:26 -0700 (PDT) Received-SPF: neutral (google.com: 216.32.181.183 is neither permitted nor denied by best guess record for domain of shawn.guo@linaro.org) client-ip=216.32.181.183; Authentication-Results: mx.google.com; spf=neutral (google.com: 216.32.181.183 is neither permitted nor denied by best guess record for domain of shawn.guo@linaro.org) smtp.mail=shawn.guo@linaro.org Received: from mail206-ch1-R.bigfish.com (216.32.181.174) by CH1EHSOBE011.bigfish.com (10.43.70.61) with Microsoft SMTP Server id 14.1.225.22; Wed, 6 Jul 2011 16:42:25 +0000 Received: from mail206-ch1 (localhost.localdomain [127.0.0.1]) by mail206-ch1-R.bigfish.com (Postfix) with ESMTP id 04A318D82B8; Wed, 6 Jul 2011 16:42:25 +0000 (UTC) X-SpamScore: 0 X-BigFish: VS0(zzzz1202hzz8275dhz2dh87h2a8h668h839h61h) X-Spam-TCS-SCL: 0:0 X-Forefront-Antispam-Report: CIP:70.37.183.190; KIP:(null); UIP:(null); IPVD:NLI; H:mail.freescale.net; RD:none; EFVD:NLI X-FB-DOMAIN-IP-MATCH: fail Received: from mail206-ch1 (localhost.localdomain [127.0.0.1]) by mail206-ch1 (MessageSwitch) id 1309970517237864_15727; Wed, 6 Jul 2011 16:41:57 +0000 (UTC) Received: from CH1EHSMHS005.bigfish.com (snatpool1.int.messaging.microsoft.com [10.43.68.247]) by mail206-ch1.bigfish.com (Postfix) with ESMTP id 3B87781820F; Wed, 6 Jul 2011 16:41:38 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by CH1EHSMHS005.bigfish.com (10.43.70.5) with Microsoft SMTP Server (TLS) id 14.1.225.22; Wed, 6 Jul 2011 16:41:36 +0000 Received: from az33smr02.freescale.net (10.64.34.200) by 039-SN1MMR1-001.039d.mgd.msft.net (10.84.1.13) with Microsoft SMTP Server id 14.1.289.8; Wed, 6 Jul 2011 11:41:34 -0500 Received: from S2100-06.ap.freescale.net (S2100-06.ap.freescale.net [10.192.242.125]) by az33smr02.freescale.net (8.13.1/8.13.0) with ESMTP id p66GfLGx027675; Wed, 6 Jul 2011 11:41:32 -0500 (CDT) From: Shawn Guo To: CC: , , , Shawn Guo , Wolfram Sang , Chris Ball , Grant Likely Subject: [PATCH v3 4/4] mmc: sdhci-esdhc-imx: add device tree probe support Date: Thu, 7 Jul 2011 00:47:50 +0800 Message-ID: <1309970870-13336-5-git-send-email-shawn.guo@linaro.org> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1309970870-13336-1-git-send-email-shawn.guo@linaro.org> References: <1309970870-13336-1-git-send-email-shawn.guo@linaro.org> MIME-Version: 1.0 X-OriginatorOrg: sigmatel.com The patch adds device tree probe support for sdhci-esdhc-imx driver. Signed-off-by: Shawn Guo Cc: Wolfram Sang Cc: Chris Ball Cc: Grant Likely Acked-by: Grant Likely --- .../devicetree/bindings/mmc/fsl-imx-esdhc.txt | 34 +++++++++ drivers/mmc/host/sdhci-esdhc-imx.c | 77 +++++++++++++++++--- 2 files changed, 102 insertions(+), 9 deletions(-) create mode 100644 Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt new file mode 100644 index 0000000..ab22fe6 --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt @@ -0,0 +1,34 @@ +* Freescale Enhanced Secure Digital Host Controller (eSDHC) for i.MX + +The Enhanced Secure Digital Host Controller on Freescale i.MX family +provides an interface for MMC, SD, and SDIO types of memory cards. + +Required properties: +- compatible : Should be "fsl,-esdhc" +- reg : Should contain eSDHC registers location and length +- interrupts : Should contain eSDHC interrupt + +Optional properties: +- fsl,card-wired : Indicate the card is wired to host permanently +- fsl,cd-internal : Indicate to use controller internal card detection +- fsl,wp-internal : Indicate to use controller internal write protection +- cd-gpios : Specify GPIOs for card detection +- wp-gpios : Specify GPIOs for write protection + +Examples: + +esdhc@70004000 { + compatible = "fsl,imx51-esdhc"; + reg = <0x70004000 0x4000>; + interrupts = <1>; + fsl,cd-internal; + fsl,wp-internal; +}; + +esdhc@70008000 { + compatible = "fsl,imx51-esdhc"; + reg = <0x70008000 0x4000>; + interrupts = <2>; + cd-gpios = <&gpio0 6 0>; /* GPIO1_6 */ + wp-gpios = <&gpio0 5 0>; /* GPIO1_5 */ +}; diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c index f3efb3b..cbdd91f 100644 --- a/drivers/mmc/host/sdhci-esdhc-imx.c +++ b/drivers/mmc/host/sdhci-esdhc-imx.c @@ -20,6 +20,9 @@ #include #include #include +#include +#include +#include #include #include "sdhci-pltfm.h" #include "sdhci-esdhc.h" @@ -73,6 +76,14 @@ static struct platform_device_id imx_esdhc_devtype[] = { } }; +static const struct of_device_id imx_esdhc_dt_ids[] = { + { .compatible = "fsl,imx25-esdhc", .data = &imx_esdhc_devtype[IMX25_ESDHC], }, + { .compatible = "fsl,imx35-esdhc", .data = &imx_esdhc_devtype[IMX35_ESDHC], }, + { .compatible = "fsl,imx51-esdhc", .data = &imx_esdhc_devtype[IMX51_ESDHC], }, + { .compatible = "fsl,imx53-esdhc", .data = &imx_esdhc_devtype[IMX53_ESDHC], }, + { /* sentinel */ } +}; + static inline int is_imx25_esdhc(struct pltfm_imx_data *data) { return data->devtype == IMX25_ESDHC; @@ -307,8 +318,48 @@ static irqreturn_t cd_irq(int irq, void *data) return IRQ_HANDLED; }; +#ifdef CONFIG_OF +static int __devinit +sdhci_esdhc_imx_probe_dt(struct platform_device *pdev, + struct esdhc_platform_data *boarddata) +{ + struct device_node *np = pdev->dev.of_node; + + if (!np) + return -ENODEV; + + if (of_get_property(np, "fsl,card-wired", NULL)) + boarddata->cd_type = ESDHC_CD_PERMANENT; + + if (of_get_property(np, "fsl,cd-controller", NULL)) + boarddata->cd_type = ESDHC_CD_CONTROLLER; + + if (of_get_property(np, "fsl,wp-controller", NULL)) + boarddata->wp_type = ESDHC_WP_CONTROLLER; + + boarddata->cd_gpio = of_get_named_gpio(np, "cd-gpios", 0); + if (gpio_is_valid(boarddata->cd_gpio)) + boarddata->cd_type = ESDHC_CD_GPIO; + + boarddata->wp_gpio = of_get_named_gpio(np, "wp-gpios", 0); + if (gpio_is_valid(boarddata->wp_gpio)) + boarddata->wp_type = ESDHC_WP_GPIO; + + return 0; +} +#else +static inline int +sdhci_esdhc_imx_probe_dt(struct platform_device *pdev, + struct esdhc_platform_data *boarddata) +{ + return -ENODEV; +} +#endif + static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev) { + const struct of_device_id *of_id = + of_match_device(imx_esdhc_dt_ids, &pdev->dev); struct sdhci_pltfm_host *pltfm_host; struct sdhci_host *host; struct esdhc_platform_data *boarddata; @@ -323,9 +374,13 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev) pltfm_host = sdhci_priv(host); imx_data = kzalloc(sizeof(struct pltfm_imx_data), GFP_KERNEL); - if (!imx_data) - return -ENOMEM; + if (!imx_data) { + err = -ENOMEM; + goto err_imx_data; + } + if (of_id) + pdev->id_entry = of_id->data; imx_data->devtype = pdev->id_entry->driver_data; pltfm_host->priv = imx_data; @@ -344,14 +399,16 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev) if (is_imx53_esdhc(imx_data)) imx_data->flags |= ESDHC_FLAG_MULTIBLK_NO_INT; - if (!host->mmc->parent->platform_data) { - dev_err(mmc_dev(host->mmc), "no board data!\n"); - err = -EINVAL; - goto no_board_data; - } - imx_data->boarddata = *((struct esdhc_platform_data *) - host->mmc->parent->platform_data); boarddata = &imx_data->boarddata; + if (sdhci_esdhc_imx_probe_dt(pdev, boarddata) < 0) { + if (!host->mmc->parent->platform_data) { + dev_err(mmc_dev(host->mmc), "no board data!\n"); + err = -EINVAL; + goto no_board_data; + } + imx_data->boarddata = *((struct esdhc_platform_data *) + host->mmc->parent->platform_data); + } /* write_protect */ if (boarddata->wp_type == ESDHC_WP_GPIO) { @@ -420,6 +477,7 @@ no_board_data: clk_put(pltfm_host->clk); err_clk_get: kfree(imx_data); +err_imx_data: sdhci_pltfm_free(pdev); return err; } @@ -455,6 +513,7 @@ static struct platform_driver sdhci_esdhc_imx_driver = { .driver = { .name = "sdhci-esdhc-imx", .owner = THIS_MODULE, + .of_match_table = imx_esdhc_dt_ids, }, .id_table = imx_esdhc_devtype, .probe = sdhci_esdhc_imx_probe,