mtd: parsers: ar7: remove support

AR7 is going to be removed from the Kernel, so remove its support for
MTD.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

arch/arm/configs/pxa_defconfig

@@ -100,7 +100,6 @@ CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_CONNECTOR=y
 CONFIG_MTD=y
-CONFIG_MTD_AR7_PARTS=m
 CONFIG_MTD_CMDLINE_PARTS=m
 CONFIG_MTD_OF_PARTS=m
 CONFIG_MTD_AFS_PARTS=m

drivers/mtd/parsers/Kconfig

 # SPDX-License-Identifier: GPL-2.0-only
-config MTD_AR7_PARTS
-	tristate "TI AR7 partitioning parser"
-	help
-	  TI AR7 partitioning parser support
-
 config MTD_BCM47XX_PARTS
 	tristate "BCM47XX partitioning parser"
 	depends on BCM47XX || ARCH_BCM_5301X

drivers/mtd/parsers/Makefile

 # SPDX-License-Identifier: GPL-2.0-only
-obj-$(CONFIG_MTD_AR7_PARTS)		+= ar7part.o
 obj-$(CONFIG_MTD_BCM47XX_PARTS)		+= bcm47xxpart.o
 obj-$(CONFIG_MTD_BCM63XX_PARTS)		+= bcm63xxpart.o
 obj-$(CONFIG_MTD_BRCM_U_BOOT)		+= brcm_u-boot.o

drivers/mtd/parsers/ar7part.c

-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright © 2007 Eugene Konev <ejka@openwrt.org>
- *
- * TI AR7 flash partition table.
- * Based on ar7 map by Felix Fietkau <nbd@openwrt.org>
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/partitions.h>
-#include <linux/memblock.h>
-#include <linux/module.h>
-
-#include <uapi/linux/magic.h>
-
-#define AR7_PARTS	4
-#define ROOT_OFFSET	0xe0000
-
-#define LOADER_MAGIC1	le32_to_cpu(0xfeedfa42)
-#define LOADER_MAGIC2	le32_to_cpu(0xfeed1281)
-
-struct ar7_bin_rec {
-	unsigned int checksum;
-	unsigned int length;
-	unsigned int address;
-};
-
-static int create_mtd_partitions(struct mtd_info *master,
-				 const struct mtd_partition **pparts,
-				 struct mtd_part_parser_data *data)
-{
-	struct ar7_bin_rec header;
-	unsigned int offset;
-	size_t len;
-	unsigned int pre_size = master->erasesize, post_size = 0;
-	unsigned int root_offset = ROOT_OFFSET;
-
-	int retries = 10;
-	struct mtd_partition *ar7_parts;
-
-	ar7_parts = kcalloc(AR7_PARTS, sizeof(*ar7_parts), GFP_KERNEL);
-	if (!ar7_parts)
-		return -ENOMEM;
-	ar7_parts[0].name = "loader";
-	ar7_parts[0].offset = 0;
-	ar7_parts[0].size = master->erasesize;
-	ar7_parts[0].mask_flags = MTD_WRITEABLE;
-
-	ar7_parts[1].name = "config";
-	ar7_parts[1].offset = 0;
-	ar7_parts[1].size = master->erasesize;
-	ar7_parts[1].mask_flags = 0;
-
-	do { /* Try 10 blocks starting from master->erasesize */
-		offset = pre_size;
-		mtd_read(master, offset, sizeof(header), &len,
-			 (uint8_t *)&header);
-		if (!strncmp((char *)&header, "TIENV0.8", 8))
-			ar7_parts[1].offset = pre_size;
-		if (header.checksum == LOADER_MAGIC1)
-			break;
-		if (header.checksum == LOADER_MAGIC2)
-			break;
-		pre_size += master->erasesize;
-	} while (retries--);
-
-	pre_size = offset;
-
-	if (!ar7_parts[1].offset) {
-		ar7_parts[1].offset = master->size - master->erasesize;
-		post_size = master->erasesize;
-	}
-
-	switch (header.checksum) {
-	case LOADER_MAGIC1:
-		while (header.length) {
-			offset += sizeof(header) + header.length;
-			mtd_read(master, offset, sizeof(header), &len,
-				 (uint8_t *)&header);
-		}
-		root_offset = offset + sizeof(header) + 4;
-		break;
-	case LOADER_MAGIC2:
-		while (header.length) {
-			offset += sizeof(header) + header.length;
-			mtd_read(master, offset, sizeof(header), &len,
-				 (uint8_t *)&header);
-		}
-		root_offset = offset + sizeof(header) + 4 + 0xff;
-		root_offset &= ~(uint32_t)0xff;
-		break;
-	default:
-		printk(KERN_WARNING "Unknown magic: %08x\n", header.checksum);
-		break;
-	}
-
-	mtd_read(master, root_offset, sizeof(header), &len, (u8 *)&header);
-	if (header.checksum != SQUASHFS_MAGIC) {
-		root_offset += master->erasesize - 1;
-		root_offset &= ~(master->erasesize - 1);
-	}
-
-	ar7_parts[2].name = "linux";
-	ar7_parts[2].offset = pre_size;
-	ar7_parts[2].size = master->size - pre_size - post_size;
-	ar7_parts[2].mask_flags = 0;
-
-	ar7_parts[3].name = "rootfs";
-	ar7_parts[3].offset = root_offset;
-	ar7_parts[3].size = master->size - root_offset - post_size;
-	ar7_parts[3].mask_flags = 0;
-
-	*pparts = ar7_parts;
-	return AR7_PARTS;
-}
-
-static struct mtd_part_parser ar7_parser = {
-	.parse_fn = create_mtd_partitions,
-	.name = "ar7part",
-};
-module_mtd_part_parser(ar7_parser);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR(	"Felix Fietkau <nbd@openwrt.org>, "
-		"Eugene Konev <ejka@openwrt.org>");
-MODULE_DESCRIPTION("MTD partitioning for TI AR7");