Commit 2af7dd8b authored by Victor Shih's avatar Victor Shih Committed by Ulf Hansson
Browse files

mmc: sdhci: add UHS-II module and add a kernel configuration 



This patch adds sdhci-uhs2.c as a module for UHS-II support.
This is a skeleton for further development in this patch series.

This kernel configuration, CONFIG_MMC_SDHCI_UHS2, will be used
in the following commits to indicate UHS-II specific code in sdhci
controllers.

Signed-off-by: default avatarBen Chuang <ben.chuang@genesyslogic.com.tw>
Signed-off-by: default avatarAKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: default avatarVictor Shih <victor.shih@genesyslogic.com.tw>
Acked-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Message-ID: <20241018105333.4569-4-victorshihgli@gmail.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 928ad8ca

drivers/mmc/host/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -98,6 +98,15 @@ config MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER 


	  This is the case for the Nintendo Wii SDHCI.



config MMC_SDHCI_UHS2

	tristate "UHS2 support on SDHCI controller"

	depends on MMC_SDHCI

	help

	  This option is selected by SDHCI controller drivers that want to

	  support UHS2-capable devices.



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



config MMC_SDHCI_PCI

	tristate "SDHCI support on PCI bus"

	depends on MMC_SDHCI && PCI

drivers/mmc/host/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ obj-$(CONFIG_MMC_PXA) += pxamci.o 
obj-$(CONFIG_MMC_MXC)		+= mxcmmc.o

obj-$(CONFIG_MMC_MXS)		+= mxs-mmc.o

obj-$(CONFIG_MMC_SDHCI)		+= sdhci.o

obj-$(CONFIG_MMC_SDHCI_UHS2)	+= sdhci-uhs2.o

obj-$(CONFIG_MMC_SDHCI_PCI)	+= sdhci-pci.o

sdhci-pci-y			+= sdhci-pci-core.o sdhci-pci-o2micro.o sdhci-pci-arasan.o \

				   sdhci-pci-dwc-mshc.o sdhci-pci-gli.o

drivers/mmc/host/sdhci-uhs2.c

0 → 100644
+41 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-or-later

/*

 *  linux/drivers/mmc/host/sdhci_uhs2.c - Secure Digital Host Controller

 *  Interface driver

 *

 *  Copyright (C) 2014 Intel Corp, All Rights Reserved.

 *  Copyright (C) 2020 Genesys Logic, Inc.

 *  Authors: Ben Chuang <ben.chuang@genesyslogic.com.tw>

 *  Copyright (C) 2020 Linaro Limited

 *  Author: AKASHI Takahiro <takahiro.akashi@linaro.org>

 */



#include <linux/module.h>



#include "sdhci.h"

#include "sdhci-uhs2.h"



#define DRIVER_NAME "sdhci_uhs2"

#define DBG(f, x...) \

	pr_debug(DRIVER_NAME " [%s()]: " f, __func__, ## x)



/*****************************************************************************\

 *                                                                           *

 * Driver init/exit                                                          *

 *                                                                           *

\*****************************************************************************/



static int __init sdhci_uhs2_mod_init(void)

{

	return 0;

}

module_init(sdhci_uhs2_mod_init);



static void __exit sdhci_uhs2_mod_exit(void)

{

}

module_exit(sdhci_uhs2_mod_exit);



MODULE_AUTHOR("Intel, Genesys Logic, Linaro");

MODULE_DESCRIPTION("MMC UHS-II Support");

MODULE_LICENSE("GPL");