From patchwork Wed Jul 4 09:45:24 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jisheng Zhang X-Patchwork-Id: 939219 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=devicetree-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=synaptics.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=Synaptics.onmicrosoft.com header.i=@Synaptics.onmicrosoft.com header.b="Gfe3AkmX"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 41LGP55VRrz9s3q for ; Wed, 4 Jul 2018 19:47:21 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753533AbeGDJrT (ORCPT ); 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Wed, 4 Jul 2018 09:47:12 +0000 Date: Wed, 4 Jul 2018 17:45:24 +0800 From: Jisheng Zhang To: Ulf Hansson , Rob Herring , Mark Rutland , Adrian Hunter Cc: linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Prabu Thangamuthu , Manjunath M B Subject: [PATCH] mmc: sdhci-of-dwcmshc: add SDHCI OF Synopsys DWC MSHC dirver Message-ID: <20180704174524.5f6d50fb@xhacker.debian> X-Mailer: Claws Mail 3.16.0 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 X-Originating-IP: [124.74.246.114] X-ClientProxiedBy: TY1PR01CA0205.jpnprd01.prod.outlook.com (2603:1096:403::35) To CY4PR03MB2632.namprd03.prod.outlook.com (2603:10b6:903:75::11) X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 28389591-22cb-464b-4b13-08d5e1931f90 X-Microsoft-Antispam: UriScan:; BCL:0; PCL:0; RULEID:(7020095)(4652040)(8989117)(5600053)(711020)(4534165)(4627221)(201703031133081)(201702281549075)(8990107)(2017052603328)(7153060)(7193020); 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Signed-off-by: Jisheng Zhang --- .../bindings/mmc/sdhci-of-dwcmshc.txt | 20 +++ drivers/mmc/host/Kconfig | 10 ++ drivers/mmc/host/Makefile | 1 + drivers/mmc/host/sdhci-of-dwcmshc.c | 117 ++++++++++++++++++ 4 files changed, 148 insertions(+) create mode 100644 Documentation/devicetree/bindings/mmc/sdhci-of-dwcmshc.txt create mode 100644 drivers/mmc/host/sdhci-of-dwcmshc.c diff --git a/Documentation/devicetree/bindings/mmc/sdhci-of-dwcmshc.txt b/Documentation/devicetree/bindings/mmc/sdhci-of-dwcmshc.txt new file mode 100644 index 000000000000..ee4253b33be2 --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/sdhci-of-dwcmshc.txt @@ -0,0 +1,20 @@ +* Synopsys DesignWare Cores Mobile Storage Host Controller + +Required properties: +- compatible: should be one of the following: + "snps,dwcmshc-sdhci" +- reg: offset and length of the register set for the device. +- interrupts: a single interrupt specifier. +- clocks: Array of clocks required for SDHCI; requires at least one for + core clock. +- clock-names: Array of names corresponding to clocks property; shall be + "core" for core clock and "bus" for optional bus clock. + +Example: + sdhci2: sdhci@aa0000 { + compatible = "snps,dwcmshc-sdhci"; + reg = <0xaa0000 0x1000>; + interrupts = ; + clocks = <&emmcclk>; + bus-width = <8>; + } diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 0581c199c996..23beb9ec6dbf 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -176,6 +176,16 @@ config MMC_SDHCI_OF_HLWD If unsure, say N. +config MMC_SDHCI_OF_DWCMSHC + tristate "SDHCI OF support for the Synopsys DWC MSHC" + depends on MMC_SDHCI_PLTFM + depends on OF + depends on COMMON_CLK + help + This selects Synopsys DesignWare Cores Mobile Storage Controller. + If you have a controller with this interface, say Y or M here. + If unsure, say N. + config MMC_SDHCI_CADENCE tristate "SDHCI support for the Cadence SD/SDIO/eMMC controller" depends on MMC_SDHCI_PLTFM diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile index 85dc1322c3de..a18fbba1b97e 100644 --- a/drivers/mmc/host/Makefile +++ b/drivers/mmc/host/Makefile @@ -82,6 +82,7 @@ obj-$(CONFIG_MMC_SDHCI_OF_ARASAN) += sdhci-of-arasan.o obj-$(CONFIG_MMC_SDHCI_OF_AT91) += sdhci-of-at91.o obj-$(CONFIG_MMC_SDHCI_OF_ESDHC) += sdhci-of-esdhc.o obj-$(CONFIG_MMC_SDHCI_OF_HLWD) += sdhci-of-hlwd.o +obj-$(CONFIG_MMC_SDHCI_OF_DWCMSHC) += sdhci-of-dwcmshc.o obj-$(CONFIG_MMC_SDHCI_BCM_KONA) += sdhci-bcm-kona.o obj-$(CONFIG_MMC_SDHCI_IPROC) += sdhci-iproc.o obj-$(CONFIG_MMC_SDHCI_MSM) += sdhci-msm.o diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c new file mode 100644 index 000000000000..93b613cd7c33 --- /dev/null +++ b/drivers/mmc/host/sdhci-of-dwcmshc.c @@ -0,0 +1,117 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Driver for Synopsys DesignWare Cores Mobile Storage Host Controller + * + * Copyright (C) 2018 Synaptics Incorporated + * + * Author: Jisheng Zhang + */ + +#include +#include +#include + +#include "sdhci-pltfm.h" + +struct dwcmshc_priv { + /* bus clock */ + struct clk *bus_clk; +}; + +static const struct sdhci_ops sdhci_dwcmshc_ops = { + .set_clock = sdhci_set_clock, + .set_bus_width = sdhci_set_bus_width, + .set_uhs_signaling = sdhci_set_uhs_signaling, + .get_max_clock = sdhci_pltfm_clk_get_max_clock, + .reset = sdhci_reset, +}; + +static const struct sdhci_pltfm_data sdhci_dwcmshc_pdata = { + .ops = &sdhci_dwcmshc_ops, + .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN, +}; + +static int dwcmshc_probe(struct platform_device *pdev) +{ + struct sdhci_pltfm_host *pltfm_host; + struct sdhci_host *host; + struct dwcmshc_priv *priv; + int err; + + host = sdhci_pltfm_init(pdev, &sdhci_dwcmshc_pdata, + sizeof(struct dwcmshc_priv)); + if (IS_ERR(host)) + return PTR_ERR(host); + + pltfm_host = sdhci_priv(host); + priv = sdhci_pltfm_priv(pltfm_host); + + pltfm_host->clk = devm_clk_get(&pdev->dev, "core"); + if (IS_ERR(pltfm_host->clk)) { + err = PTR_ERR(pltfm_host->clk); + dev_err(&pdev->dev, "failed to get core clk: %d\n", err); + goto free_pltfm; + } + err = clk_prepare_enable(pltfm_host->clk); + if (err) + goto free_pltfm; + + priv->bus_clk = devm_clk_get(&pdev->dev, "bus"); + if (!IS_ERR(priv->bus_clk)) + clk_prepare_enable(priv->bus_clk); + + err = mmc_of_parse(host->mmc); + if (err) + goto err_clk; + + sdhci_get_of_property(pdev); + + err = sdhci_add_host(host); + if (err) + goto err_clk; + + return 0; + +err_clk: + clk_disable_unprepare(pltfm_host->clk); + clk_disable_unprepare(priv->bus_clk); +free_pltfm: + sdhci_pltfm_free(pdev); + return err; +} + +static int dwcmshc_remove(struct platform_device *pdev) +{ + struct sdhci_host *host = platform_get_drvdata(pdev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host); + + sdhci_remove_host(host, 0); + + clk_disable_unprepare(pltfm_host->clk); + clk_disable_unprepare(priv->bus_clk); + + sdhci_pltfm_free(pdev); + + return 0; +} + +static const struct of_device_id sdhci_dwcmshc_dt_ids[] = { + { .compatible = "snps,dwcmshc-sdhci" }, + {} +}; +MODULE_DEVICE_TABLE(of, sdhci_dwcmshc_dt_ids); + +static struct platform_driver sdhci_dwcmshc_driver = { + .driver = { + .name = "sdhci-dwcmshc", + .of_match_table = sdhci_dwcmshc_dt_ids, + }, + .probe = dwcmshc_probe, + .remove = dwcmshc_remove, +}; +module_platform_driver(sdhci_dwcmshc_driver); + +MODULE_DESCRIPTION("SDHCI platform driver for Synopsys DWC MSHC"); +MODULE_AUTHOR("Jisheng Zhang "); +MODULE_LICENSE("GPL v2");