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

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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: Ben Chuang <ben.chuang@genesyslogic.com.tw>
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: Victor Shih <victor.shih@genesyslogic.com.tw>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Message-ID: <20241018105333.4569-4-victorshihgli@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Victor Shih 2024-10-18 18:53:20 +08:00 committed by Ulf Hansson
parent 928ad8caf2
commit 2af7dd8b64
3 changed files with 51 additions and 0 deletions
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9
drivers/mmc/host/Kconfig
View File

@ -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

1
drivers/mmc/host/Makefile
View File

@ -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

41
drivers/mmc/host/sdhci-uhs2.c Normal file
View File

@ -0,0 +1,41 @@
// 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");