avr32: remove support for AVR32 architecture

This patch drops support for AVR32 architecture from the Linux kernel.

The AVR32 architecture is not keeping up with the development of the
kernel, and since it shares so much of the drivers with Atmel ARM SoC,
it is starting to hinder these drivers to develop swiftly.

Also, all AVR32 AP7 SoC processors are end of lifed from Atmel (now
Microchip).

Finally, the GCC toolchain is stuck at version 4.2.x, and has not
received any patches since the last release from Atmel;
4.2.4-atmel.1.1.3.avr32linux.1. When building kernel v4.10, this
toolchain is no longer able to properly link the network stack.

Haavard and I have came to the conclusion that we feel keeping AVR32 on
life support offers more obstacles for Atmel ARMs, than it gives joy to
AVR32 users. I also suspect there are very few AVR32 users left today,
if anybody at all.

Signed-off-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no>
Signed-off-by: Håvard Skinnemoen <hskinnemoen@gmail.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>

5 files changed, 0 insertions, 148 deletions

diff --git a/arch/avr32/boot/images/.gitignore b/arch/avr32/boot/images/.gitignore
deleted file mode 100644
index 64ea9d0..0000000
--- a/arch/avr32/boot/images/.gitignore
+++ /dev/null
@@ -1,4 +0,0 @@
-uImage
-uImage.srec
-vmlinux.cso
-sfdwarf.log
diff --git a/arch/avr32/boot/images/Makefile b/arch/avr32/boot/images/Makefile
deleted file mode 100644
index 2a3b539..0000000
--- a/arch/avr32/boot/images/Makefile
+++ /dev/null
@@ -1,57 +0,0 @@
-#
-# Copyright (C) 2004-2006 Atmel Corporation
-#
-# This file is subject to the terms and conditions of the GNU General Public
-# License.  See the file "COPYING" in the main directory of this archive
-# for more details.
-#
-
-extra-y		:= vmlinux.bin vmlinux.gz
-
-OBJCOPYFLAGS_vmlinux.bin := -O binary -R .note.gnu.build-id
-$(obj)/vmlinux.bin: vmlinux FORCE
-	$(call if_changed,objcopy)
-
-$(obj)/vmlinux.gz: $(obj)/vmlinux.bin FORCE
-	$(call if_changed,gzip)
-
-UIMAGE_LOADADDR = $(CONFIG_LOAD_ADDRESS)
-UIMAGE_ENTRYADDR = $(CONFIG_ENTRY_ADDRESS)
-UIMAGE_COMPRESSION = gzip
-
-targets += uImage uImage.srec
-$(obj)/uImage: $(obj)/vmlinux.gz
-	$(call if_changed,uimage)
-	@echo '  Image $@ is ready'
-
-OBJCOPYFLAGS_uImage.srec := -I binary -O srec
-$(obj)/uImage.srec: $(obj)/uImage
-	$(call if_changed,objcopy)
-
-OBJCOPYFLAGS_vmlinux.elf := --change-section-lma .text-0x80000000 \
-			    --change-section-lma __ex_table-0x80000000 \
-			    --change-section-lma .rodata-0x80000000 \
-			    --change-section-lma .data-0x80000000 \
-			    --change-section-lma .init-0x80000000 \
-			    --change-section-lma .bss-0x80000000 \
-			    --change-section-lma __param-0x80000000 \
-			    --change-section-lma __ksymtab-0x80000000 \
-			    --change-section-lma __ksymtab_gpl-0x80000000 \
-			    --change-section-lma __kcrctab-0x80000000 \
-			    --change-section-lma __kcrctab_gpl-0x80000000 \
-			    --change-section-lma __ksymtab_strings-0x80000000 \
-			    --set-start 0xa0000000
-$(obj)/vmlinux.elf: vmlinux FORCE
-	$(call if_changed,objcopy)
-
-quiet_cmd_sfdwarf = SFDWARF $@
-      cmd_sfdwarf = sfdwarf $< TO $@ GNUAVR IW $(SFDWARF_FLAGS) > $(obj)/sfdwarf.log
-
-$(obj)/vmlinux.cso: $(obj)/vmlinux.elf FORCE
-	$(call if_changed,sfdwarf)
-
-install: $(BOOTIMAGE)
-	sh $(srctree)/install-kernel.sh $<
-
-# Generated files to be removed upon make clean
-clean-files	:= vmlinux.elf vmlinux.bin vmlinux.gz uImage uImage.srec
diff --git a/arch/avr32/boot/u-boot/Makefile b/arch/avr32/boot/u-boot/Makefile
deleted file mode 100644
index 125ddc9..0000000
--- a/arch/avr32/boot/u-boot/Makefile
+++ /dev/null
@@ -1,3 +0,0 @@
-extra-y		:= head.o
-
-obj-y		:= empty.o
diff --git a/arch/avr32/boot/u-boot/empty.S b/arch/avr32/boot/u-boot/empty.S
deleted file mode 100644
index 8ac91a5..0000000
--- a/arch/avr32/boot/u-boot/empty.S
+++ /dev/null
@@ -1 +0,0 @@
-/* Empty file */
diff --git a/arch/avr32/boot/u-boot/head.S b/arch/avr32/boot/u-boot/head.S
deleted file mode 100644
index 2ffc298..0000000
--- a/arch/avr32/boot/u-boot/head.S
+++ /dev/null
@@ -1,83 +0,0 @@
-/*
- * Startup code for use with the u-boot bootloader.
- *
- * Copyright (C) 2004-2006 Atmel Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <asm/setup.h>
-#include <asm/thread_info.h>
-#include <asm/sysreg.h>
-
-	/*
-	 * The kernel is loaded where we want it to be and all caches
-	 * have just been flushed. We get two parameters from u-boot:
-	 *
-	 * r12 contains a magic number (ATAG_MAGIC)
-	 * r11 points to a tag table providing information about
-	 *     the system.
-	 */
-	.section .init.text,"ax"
-	.global _start
-_start:
-	/* Initialize .bss */
-	lddpc	r2, bss_start_addr
-	lddpc   r3, end_addr
-	mov	r0, 0
-	mov	r1, 0
-1:      st.d    r2++, r0
-	cp      r2, r3
-	brlo    1b
-
-	/* Initialize status register */
-	lddpc	r0, init_sr
-	mtsr	SYSREG_SR, r0
-
-	/* Set initial stack pointer */
-	lddpc	sp, stack_addr
-	sub	sp, -THREAD_SIZE
-
-#ifdef CONFIG_FRAME_POINTER
-	/* Mark last stack frame */
-	mov	lr, 0
-	mov	r7, 0
-#endif
-
-	/* Check if the boot loader actually provided a tag table */
-	lddpc	r0, magic_number
-	cp.w	r12, r0
-	brne	no_tag_table
-
-	/*
-	 * Save the tag table address for later use. This must be done
-	 * _after_ .bss has been initialized...
-	 */
-	lddpc	r0, tag_table_addr
-	st.w	r0[0], r11
-
-	/* Jump to loader-independent setup code */
-	rjmp	kernel_entry
-
-	.align	2
-magic_number:
-	.long	ATAG_MAGIC
-tag_table_addr:
-	.long	bootloader_tags
-bss_start_addr:
-	.long   __bss_start
-end_addr:
-	.long   _end
-init_sr:
-	.long	0x007f0000	/* Supervisor mode, everything masked */
-stack_addr:
-	.long	init_thread_union
-panic_addr:
-	.long	panic
-
-no_tag_table:
-	sub	r12, pc, (. - 2f)
-	/* branch to panic() which can be far away with that construct */
-	lddpc	pc, panic_addr
-2:	.asciz	"Boot loader didn't provide correct magic number\n"