Commit 0ebebb21 authored by Tomer Maimon's avatar Tomer Maimon Committed by Ulf Hansson
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mmc: sdhci-npcm: Add NPCM SDHCI driver 



Add Nuvoton NPCM BMC sdhci-pltfm controller driver.

Signed-off-by: default avatarTomer Maimon <tmaimon77@gmail.com>
Acked-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Reviewed-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20231002200610.129799-3-tmaimon77@gmail.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 4436673a

drivers/mmc/host/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -429,6 +429,14 @@ config MMC_SDHCI_IPROC 


	  If unsure, say N.



config MMC_SDHCI_NPCM

	tristate "Secure Digital Host Controller Interface support for NPCM"

	depends on ARCH_NPCM || COMPILE_TEST

	depends on MMC_SDHCI_PLTFM

	help

	  This provides support for the SD/eMMC controller found in

	  NPCM BMC family SoCs.



config MMC_MESON_GX

	tristate "Amlogic S905/GX*/AXG SD/MMC Host Controller support"

	depends on ARCH_MESON|| COMPILE_TEST

drivers/mmc/host/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -89,6 +89,7 @@ obj-$(CONFIG_MMC_SDHCI_OF_DWCMSHC) += sdhci-of-dwcmshc.o 
obj-$(CONFIG_MMC_SDHCI_OF_SPARX5)	+= sdhci-of-sparx5.o

obj-$(CONFIG_MMC_SDHCI_BCM_KONA)	+= sdhci-bcm-kona.o

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

obj-$(CONFIG_MMC_SDHCI_NPCM)		+= sdhci-npcm.o

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

obj-$(CONFIG_MMC_SDHCI_ST)		+= sdhci-st.o

obj-$(CONFIG_MMC_SDHCI_MICROCHIP_PIC32)	+= sdhci-pic32.o

drivers/mmc/host/sdhci-npcm.c

0 → 100644
+94 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0+

/*

 * NPCM SDHC MMC host controller driver.

 *

 * Copyright (c) 2023 Nuvoton Technology corporation.

 */



#include <linux/clk.h>

#include <linux/err.h>

#include <linux/io.h>

#include <linux/mmc/host.h>

#include <linux/mmc/mmc.h>

#include <linux/mod_devicetable.h>

#include <linux/module.h>

#include <linux/of.h>



#include "sdhci-pltfm.h"



static const struct sdhci_pltfm_data npcm7xx_sdhci_pdata = {

	.quirks  = SDHCI_QUIRK_DELAY_AFTER_POWER,

	.quirks2 = SDHCI_QUIRK2_STOP_WITH_TC |

		   SDHCI_QUIRK2_NO_1_8_V,

};



static const struct sdhci_pltfm_data npcm8xx_sdhci_pdata = {

	.quirks  = SDHCI_QUIRK_DELAY_AFTER_POWER,

	.quirks2 = SDHCI_QUIRK2_STOP_WITH_TC,

};



static int npcm_sdhci_probe(struct platform_device *pdev)

{

	const struct sdhci_pltfm_data *data;

	struct sdhci_pltfm_host *pltfm_host;

	struct device *dev = &pdev->dev;

	struct sdhci_host *host;

	u32 caps;

	int ret;



	data = of_device_get_match_data(dev);

	if (!data)

		return -EINVAL;



	host = sdhci_pltfm_init(pdev, data, 0);

	if (IS_ERR(host))

		return PTR_ERR(host);



	pltfm_host = sdhci_priv(host);



	pltfm_host->clk = devm_clk_get_optional_enabled(dev, NULL);

	if (IS_ERR(pltfm_host->clk)) {

		ret = PTR_ERR(pltfm_host->clk);

		goto err_sdhci;

	}



	caps = sdhci_readl(host, SDHCI_CAPABILITIES);

	if (caps & SDHCI_CAN_DO_8BIT)

		host->mmc->caps |= MMC_CAP_8_BIT_DATA;



	ret = mmc_of_parse(host->mmc);

	if (ret)

		goto err_sdhci;



	ret = sdhci_add_host(host);

	if (ret)

		goto err_sdhci;



	return 0;



err_sdhci:

	sdhci_pltfm_free(pdev);

	return ret;

}



static const struct of_device_id npcm_sdhci_of_match[] = {

	{ .compatible = "nuvoton,npcm750-sdhci", .data = &npcm7xx_sdhci_pdata },

	{ .compatible = "nuvoton,npcm845-sdhci", .data = &npcm8xx_sdhci_pdata },

	{ }

};

MODULE_DEVICE_TABLE(of, npcm_sdhci_of_match);



static struct platform_driver npcm_sdhci_driver = {

	.driver = {

		.name	= "npcm-sdhci",

		.of_match_table = npcm_sdhci_of_match,

		.pm	= &sdhci_pltfm_pmops,

	},

	.probe		= npcm_sdhci_probe,

	.remove_new	= sdhci_pltfm_remove,

};

module_platform_driver(npcm_sdhci_driver);



MODULE_DESCRIPTION("NPCM Secure Digital Host Controller Interface driver");

MODULE_AUTHOR("Tomer Maimon <tomer.maimon@nuvoton.com>");

MODULE_LICENSE("GPL");