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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 Signed-off-by: AKASHI Takahiro Signed-off-by: Victor Shih --- Updates in V22: - Remove defined but not used code. Updates in V9: - Modify the commit message. Updates in V8: - Modify MODULE_LICENSE from "GPL v2" to "GPL". Updates in V6: - Merage V5 of patch[7] and patch[9] in to V6 of patch[8]. --- drivers/mmc/host/Kconfig | 9 ++++++++ drivers/mmc/host/Makefile | 1 + drivers/mmc/host/sdhci-uhs2.c | 41 +++++++++++++++++++++++++++++++++++ 3 files changed, 51 insertions(+) create mode 100644 drivers/mmc/host/sdhci-uhs2.c diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 0ba5a9f769fb..45df8ddb8918 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -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 diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile index 3ccffebbe59b..5147467ec825 100644 --- a/drivers/mmc/host/Makefile +++ b/drivers/mmc/host/Makefile @@ -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 diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c new file mode 100644 index 000000000000..9ec1d6abb47c --- /dev/null +++ b/drivers/mmc/host/sdhci-uhs2.c @@ -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 + * Copyright (C) 2020 Linaro Limited + * Author: AKASHI Takahiro + */ + +#include + +#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");