diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig index 59278d1eef6b5a6156e43d3e02f06a295be3c0bb..23dff48f081eb99ca109ebac49330dbebed4f8e6 100644 --- a/drivers/mtd/Kconfig +++ b/drivers/mtd/Kconfig @@ -1,3 +1,15 @@ +menu "MTD Support" + +config MTD + bool "Enable Driver Model for MTD drivers" + depends on DM + help + Enable driver model for Memory Technology Devices (MTD), such as + flash, RAM and similar chips, often used for solid state file + systems on embedded devices. + +endmenu + source "drivers/mtd/nand/Kconfig" source "drivers/mtd/spi/Kconfig" diff --git a/drivers/mtd/Makefile b/drivers/mtd/Makefile index a623f4c9fa3fc904cd7a877877d9fb591e31ed23..c23c0c1fdf8ac843d6a6332bf51e84af8b5f3811 100644 --- a/drivers/mtd/Makefile +++ b/drivers/mtd/Makefile @@ -8,6 +8,7 @@ ifneq (,$(findstring y,$(CONFIG_MTD_DEVICE)$(CONFIG_CMD_NAND)$(CONFIG_CMD_ONENAND)$(CONFIG_CMD_SF))) obj-y += mtdcore.o mtd_uboot.o endif +obj-$(CONFIG_MTD) += mtd-uclass.o obj-$(CONFIG_MTD_PARTITIONS) += mtdpart.o obj-$(CONFIG_MTD_CONCAT) += mtdconcat.o obj-$(CONFIG_HAS_DATAFLASH) += at45.o diff --git a/drivers/mtd/mtd-uclass.c b/drivers/mtd/mtd-uclass.c new file mode 100644 index 0000000000000000000000000000000000000000..7b7c48ec5adf6e7893f9f9436c75be6e56e4bedc --- /dev/null +++ b/drivers/mtd/mtd-uclass.c @@ -0,0 +1,21 @@ +/* + * Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <mtd.h> + +/* + * Implement a MTD uclass which should include most flash drivers. + * The uclass private is pointed to mtd_info. + */ + +UCLASS_DRIVER(mtd) = { + .id = UCLASS_MTD, + .name = "mtd", + .per_device_auto_alloc_size = sizeof(struct mtd_info), +}; diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h index d0cf4ce6a0d20e1af896db81d675a89daa1c7742..327de3486b5511c5a6b43156ff04694dd1bd7151 100644 --- a/include/dm/uclass-id.h +++ b/include/dm/uclass-id.h @@ -43,6 +43,7 @@ enum uclass_id { UCLASS_MISC, /* Miscellaneous device */ UCLASS_MMC, /* SD / MMC card or chip */ UCLASS_MOD_EXP, /* RSA Mod Exp device */ + UCLASS_MTD, /* Memory Technology Device (MTD) device */ UCLASS_PCH, /* x86 platform controller hub */ UCLASS_PCI, /* PCI bus */ UCLASS_PCI_GENERIC, /* Generic PCI bus device */ diff --git a/include/flash.h b/include/flash.h index 5754cf97737c1b5658327c3f521408cacec78b9e..13e03842c84b2c0733af57a4c9ad23dce709fe6c 100644 --- a/include/flash.h +++ b/include/flash.h @@ -41,6 +41,9 @@ typedef struct { ulong addr_unlock2; /* unlock address 2 for AMD flash roms */ const char *name; /* human-readable name */ #endif +#ifdef CONFIG_MTD + struct mtd_info *mtd; +#endif } flash_info_t; extern flash_info_t flash_info[]; /* info for FLASH chips */ diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h index e3d3fc73fd62cbf2900086ec18114e59c1dc0d28..c2cd3df1fa54d0904fa81b19685039c5ea4fe920 100644 --- a/include/linux/mtd/mtd.h +++ b/include/linux/mtd/mtd.h @@ -272,6 +272,8 @@ struct mtd_info { struct module *owner; #ifndef __UBOOT__ struct device dev; +#else + struct udevice *dev; #endif int usecount; }; diff --git a/include/mtd.h b/include/mtd.h new file mode 100644 index 0000000000000000000000000000000000000000..3f8c293b00e1bc550443ac176da96c3a94383ddd --- /dev/null +++ b/include/mtd.h @@ -0,0 +1,23 @@ +/* + * Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _MTD_H_ +#define _MTD_H_ + +#include <linux/mtd/mtd.h> + +/* + * Get mtd_info structure of the dev, which is stored as uclass private. + * + * @dev: The MTD device + * @return: pointer to mtd_info, NULL on error + */ +static inline struct mtd_info *mtd_get_info(struct udevice *dev) +{ + return dev_get_uclass_priv(dev); +} + +#endif /* _MTD_H_ */