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Commit e438cf49 authored by Jisheng Zhang's avatar Jisheng Zhang Committed by Ulf Hansson
Browse files

mmc: sdhci-of-dwcmshc: add SDHCI OF Synopsys DWC MSHC driver 



Add a driver for SDHCI OF Synopsys DesignWare Cores Mobile Storage

Signed-off-by: default avatarJisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Acked-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
parent aaadfa66

drivers/mmc/host/Kconfig

+11 −0
Original line number Original line Diff line number Diff line
@@ -176,6 +176,17 @@ config MMC_SDHCI_OF_HLWD 




	  If unsure, say N.

	  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

	  support.

	  If you have a controller with this interface, say Y or M here.

	  If unsure, say N.



config MMC_SDHCI_CADENCE

config MMC_SDHCI_CADENCE

	tristate "SDHCI support for the Cadence SD/SDIO/eMMC controller"

	tristate "SDHCI support for the Cadence SD/SDIO/eMMC controller"

	depends on MMC_SDHCI_PLTFM

	depends on MMC_SDHCI_PLTFM

drivers/mmc/host/Makefile

+1 −0
Original line number Original line Diff line number Diff line
@@ -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_AT91)		+= sdhci-of-at91.o

obj-$(CONFIG_MMC_SDHCI_OF_ESDHC)	+= sdhci-of-esdhc.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_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_BCM_KONA)	+= sdhci-bcm-kona.o

obj-$(CONFIG_MMC_SDHCI_IPROC)		+= sdhci-iproc.o

obj-$(CONFIG_MMC_SDHCI_IPROC)		+= sdhci-iproc.o

obj-$(CONFIG_MMC_SDHCI_MSM)		+= sdhci-msm.o

obj-$(CONFIG_MMC_SDHCI_MSM)		+= sdhci-msm.o

drivers/mmc/host/sdhci-of-dwcmshc.c

0 → 100644
+116 −0
Original line number Original line Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

/*

 * Driver for Synopsys DesignWare Cores Mobile Storage Host Controller

 *

 * Copyright (C) 2018 Synaptics Incorporated

 *

 * Author: Jisheng Zhang <jszhang@kernel.org>

 */



#include <linux/clk.h>

#include <linux/module.h>

#include <linux/of.h>



#include "sdhci-pltfm.h"



struct dwcmshc_priv {

	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 <jszhang@kernel.org>");

MODULE_LICENSE("GPL v2");