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>

1 files changed, 0 insertions, 410 deletions

diff --git a/arch/avr32/kernel/cpu.c b/arch/avr32/kernel/cpu.c
deleted file mode 100644
index 0341ae27c9ec..000000000000
--- a/arch/avr32/kernel/cpu.c
+++ /dev/null
@@ -1,410 +0,0 @@
-/*
- * Copyright (C) 2005-2006 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 <linux/init.h>
-#include <linux/device.h>
-#include <linux/seq_file.h>
-#include <linux/cpu.h>
-#include <linux/module.h>
-#include <linux/percpu.h>
-#include <linux/param.h>
-#include <linux/errno.h>
-#include <linux/clk.h>
-
-#include <asm/setup.h>
-#include <asm/sysreg.h>
-
-static DEFINE_PER_CPU(struct cpu, cpu_devices);
-
-#ifdef CONFIG_PERFORMANCE_COUNTERS
-
-/*
- * XXX: If/when a SMP-capable implementation of AVR32 will ever be
- * made, we must make sure that the code executes on the correct CPU.
- */
-static ssize_t show_pc0event(struct device *dev,
-			struct device_attribute *attr, char *buf)
-{
-	unsigned long pccr;
-
-	pccr = sysreg_read(PCCR);
-	return sprintf(buf, "0x%lx\n", (pccr >> 12) & 0x3f);
-}
-static ssize_t store_pc0event(struct device *dev,
-			struct device_attribute *attr, const char *buf,
-			      size_t count)
-{
-	unsigned long val;
-	int ret;
-
-	ret = kstrtoul(buf, 0, &val);
-	if (ret)
-		return ret;
-	if (val > 0x3f)
-		return -EINVAL;
-	val = (val << 12) | (sysreg_read(PCCR) & 0xfffc0fff);
-	sysreg_write(PCCR, val);
-	return count;
-}
-static ssize_t show_pc0count(struct device *dev,
-			struct device_attribute *attr, char *buf)
-{
-	unsigned long pcnt0;
-
-	pcnt0 = sysreg_read(PCNT0);
-	return sprintf(buf, "%lu\n", pcnt0);
-}
-static ssize_t store_pc0count(struct device *dev,
-				struct device_attribute *attr,
-				const char *buf, size_t count)
-{
-	unsigned long val;
-	int ret;
-
-	ret = kstrtoul(buf, 0, &val);
-	if (ret)
-		return ret;
-	sysreg_write(PCNT0, val);
-
-	return count;
-}
-
-static ssize_t show_pc1event(struct device *dev,
-				struct device_attribute *attr, char *buf)
-{
-	unsigned long pccr;
-
-	pccr = sysreg_read(PCCR);
-	return sprintf(buf, "0x%lx\n", (pccr >> 18) & 0x3f);
-}
-static ssize_t store_pc1event(struct device *dev,
-			      struct device_attribute *attr, const char *buf,
-			      size_t count)
-{
-	unsigned long val;
-	int ret;
-
-	ret = kstrtoul(buf, 0, &val);
-	if (ret)
-		return ret;
-	if (val > 0x3f)
-		return -EINVAL;
-	val = (val << 18) | (sysreg_read(PCCR) & 0xff03ffff);
-	sysreg_write(PCCR, val);
-	return count;
-}
-static ssize_t show_pc1count(struct device *dev,
-				struct device_attribute *attr, char *buf)
-{
-	unsigned long pcnt1;
-
-	pcnt1 = sysreg_read(PCNT1);
-	return sprintf(buf, "%lu\n", pcnt1);
-}
-static ssize_t store_pc1count(struct device *dev,
-				struct device_attribute *attr, const char *buf,
-			      size_t count)
-{
-	unsigned long val;
-	int ret;
-
-	ret = kstrtoul(buf, 0, &val);
-	if (ret)
-		return ret;
-	sysreg_write(PCNT1, val);
-
-	return count;
-}
-
-static ssize_t show_pccycles(struct device *dev,
-				struct device_attribute *attr, char *buf)
-{
-	unsigned long pccnt;
-
-	pccnt = sysreg_read(PCCNT);
-	return sprintf(buf, "%lu\n", pccnt);
-}
-static ssize_t store_pccycles(struct device *dev,
-				struct device_attribute *attr, const char *buf,
-			      size_t count)
-{
-	unsigned long val;
-	int ret;
-
-	ret = kstrtoul(buf, 0, &val);
-	if (ret)
-		return ret;
-	sysreg_write(PCCNT, val);
-
-	return count;
-}
-
-static ssize_t show_pcenable(struct device *dev,
-			struct device_attribute *attr, char *buf)
-{
-	unsigned long pccr;
-
-	pccr = sysreg_read(PCCR);
-	return sprintf(buf, "%c\n", (pccr & 1)?'1':'0');
-}
-static ssize_t store_pcenable(struct device *dev,
-			      struct device_attribute *attr, const char *buf,
-			      size_t count)
-{
-	unsigned long pccr, val;
-	int ret;
-
-	ret = kstrtoul(buf, 0, &val);
-	if (ret)
-		return ret;
-	if (val)
-		val = 1;
-
-	pccr = sysreg_read(PCCR);
-	pccr = (pccr & ~1UL) | val;
-	sysreg_write(PCCR, pccr);
-
-	return count;
-}
-
-static DEVICE_ATTR(pc0event, 0600, show_pc0event, store_pc0event);
-static DEVICE_ATTR(pc0count, 0600, show_pc0count, store_pc0count);
-static DEVICE_ATTR(pc1event, 0600, show_pc1event, store_pc1event);
-static DEVICE_ATTR(pc1count, 0600, show_pc1count, store_pc1count);
-static DEVICE_ATTR(pccycles, 0600, show_pccycles, store_pccycles);
-static DEVICE_ATTR(pcenable, 0600, show_pcenable, store_pcenable);
-
-#endif /* CONFIG_PERFORMANCE_COUNTERS */
-
-static int __init topology_init(void)
-{
-	int cpu;
-
-	for_each_possible_cpu(cpu) {
-		struct cpu *c = &per_cpu(cpu_devices, cpu);
-
-		register_cpu(c, cpu);
-
-#ifdef CONFIG_PERFORMANCE_COUNTERS
-		device_create_file(&c->dev, &dev_attr_pc0event);
-		device_create_file(&c->dev, &dev_attr_pc0count);
-		device_create_file(&c->dev, &dev_attr_pc1event);
-		device_create_file(&c->dev, &dev_attr_pc1count);
-		device_create_file(&c->dev, &dev_attr_pccycles);
-		device_create_file(&c->dev, &dev_attr_pcenable);
-#endif
-	}
-
-	return 0;
-}
-
-subsys_initcall(topology_init);
-
-struct chip_id_map {
-	u16	mid;
-	u16	pn;
-	const char *name;
-};
-
-static const struct chip_id_map chip_names[] = {
-	{ .mid = 0x1f, .pn = 0x1e82, .name = "AT32AP700x" },
-};
-#define NR_CHIP_NAMES ARRAY_SIZE(chip_names)
-
-static const char *cpu_names[] = {
-	"Morgan",
-	"AP7",
-};
-#define NR_CPU_NAMES ARRAY_SIZE(cpu_names)
-
-static const char *arch_names[] = {
-	"AVR32A",
-	"AVR32B",
-};
-#define NR_ARCH_NAMES ARRAY_SIZE(arch_names)
-
-static const char *mmu_types[] = {
-	"No MMU",
-	"ITLB and DTLB",
-	"Shared TLB",
-	"MPU"
-};
-
-static const char *cpu_feature_flags[] = {
-	"rmw", "dsp", "simd", "ocd", "perfctr", "java", "fpu",
-};
-
-static const char *get_chip_name(struct avr32_cpuinfo *cpu)
-{
-	unsigned int i;
-	unsigned int mid = avr32_get_manufacturer_id(cpu);
-	unsigned int pn = avr32_get_product_number(cpu);
-
-	for (i = 0; i < NR_CHIP_NAMES; i++) {
-		if (chip_names[i].mid == mid && chip_names[i].pn == pn)
-			return chip_names[i].name;
-	}
-
-	return "(unknown)";
-}
-
-void __init setup_processor(void)
-{
-	unsigned long config0, config1;
-	unsigned long features;
-	unsigned cpu_id, cpu_rev, arch_id, arch_rev, mmu_type;
-	unsigned device_id;
-	unsigned tmp;
-	unsigned i;
-
-	config0 = sysreg_read(CONFIG0);
-	config1 = sysreg_read(CONFIG1);
-	cpu_id = SYSREG_BFEXT(PROCESSORID, config0);
-	cpu_rev = SYSREG_BFEXT(PROCESSORREVISION, config0);
-	arch_id = SYSREG_BFEXT(AT, config0);
-	arch_rev = SYSREG_BFEXT(AR, config0);
-	mmu_type = SYSREG_BFEXT(MMUT, config0);
-
-	device_id = ocd_read(DID);
-
-	boot_cpu_data.arch_type = arch_id;
-	boot_cpu_data.cpu_type = cpu_id;
-	boot_cpu_data.arch_revision = arch_rev;
-	boot_cpu_data.cpu_revision = cpu_rev;
-	boot_cpu_data.tlb_config = mmu_type;
-	boot_cpu_data.device_id = device_id;
-
-	tmp = SYSREG_BFEXT(ILSZ, config1);
-	if (tmp) {
-		boot_cpu_data.icache.ways = 1 << SYSREG_BFEXT(IASS, config1);
-		boot_cpu_data.icache.sets = 1 << SYSREG_BFEXT(ISET, config1);
-		boot_cpu_data.icache.linesz = 1 << (tmp + 1);
-	}
-	tmp = SYSREG_BFEXT(DLSZ, config1);
-	if (tmp) {
-		boot_cpu_data.dcache.ways = 1 << SYSREG_BFEXT(DASS, config1);
-		boot_cpu_data.dcache.sets = 1 << SYSREG_BFEXT(DSET, config1);
-		boot_cpu_data.dcache.linesz = 1 << (tmp + 1);
-	}
-
-	if ((cpu_id >= NR_CPU_NAMES) || (arch_id >= NR_ARCH_NAMES)) {
-		printk ("Unknown CPU configuration (ID %02x, arch %02x), "
-			"continuing anyway...\n",
-			cpu_id, arch_id);
-		return;
-	}
-
-	printk ("CPU: %s chip revision %c\n", get_chip_name(&boot_cpu_data),
-			avr32_get_chip_revision(&boot_cpu_data) + 'A');
-	printk ("CPU: %s [%02x] core revision %d (%s arch revision %d)\n",
-		cpu_names[cpu_id], cpu_id, cpu_rev,
-		arch_names[arch_id], arch_rev);
-	printk ("CPU: MMU configuration: %s\n", mmu_types[mmu_type]);
-
-	printk ("CPU: features:");
-	features = 0;
-	if (config0 & SYSREG_BIT(CONFIG0_R))
-		features |= AVR32_FEATURE_RMW;
-	if (config0 & SYSREG_BIT(CONFIG0_D))
-		features |= AVR32_FEATURE_DSP;
-	if (config0 & SYSREG_BIT(CONFIG0_S))
-		features |= AVR32_FEATURE_SIMD;
-	if (config0 & SYSREG_BIT(CONFIG0_O))
-		features |= AVR32_FEATURE_OCD;
-	if (config0 & SYSREG_BIT(CONFIG0_P))
-		features |= AVR32_FEATURE_PCTR;
-	if (config0 & SYSREG_BIT(CONFIG0_J))
-		features |= AVR32_FEATURE_JAVA;
-	if (config0 & SYSREG_BIT(CONFIG0_F))
-		features |= AVR32_FEATURE_FPU;
-
-	for (i = 0; i < ARRAY_SIZE(cpu_feature_flags); i++)
-		if (features & (1 << i))
-			printk(" %s", cpu_feature_flags[i]);
-
-	printk("\n");
-	boot_cpu_data.features = features;
-}
-
-#ifdef CONFIG_PROC_FS
-static int c_show(struct seq_file *m, void *v)
-{
-	unsigned int icache_size, dcache_size;
-	unsigned int cpu = smp_processor_id();
-	unsigned int freq;
-	unsigned int i;
-
-	icache_size = boot_cpu_data.icache.ways *
-		boot_cpu_data.icache.sets *
-		boot_cpu_data.icache.linesz;
-	dcache_size = boot_cpu_data.dcache.ways *
-		boot_cpu_data.dcache.sets *
-		boot_cpu_data.dcache.linesz;
-
-	seq_printf(m, "processor\t: %d\n", cpu);
-
-	seq_printf(m, "chip type\t: %s revision %c\n",
-			get_chip_name(&boot_cpu_data),
-			avr32_get_chip_revision(&boot_cpu_data) + 'A');
-	if (boot_cpu_data.arch_type < NR_ARCH_NAMES)
-		seq_printf(m, "cpu arch\t: %s revision %d\n",
-			   arch_names[boot_cpu_data.arch_type],
-			   boot_cpu_data.arch_revision);
-	if (boot_cpu_data.cpu_type < NR_CPU_NAMES)
-		seq_printf(m, "cpu core\t: %s revision %d\n",
-			   cpu_names[boot_cpu_data.cpu_type],
-			   boot_cpu_data.cpu_revision);
-
-	freq = (clk_get_rate(boot_cpu_data.clk) + 500) / 1000;
-	seq_printf(m, "cpu MHz\t\t: %u.%03u\n", freq / 1000, freq % 1000);
-
-	seq_printf(m, "i-cache\t\t: %dK (%u ways x %u sets x %u)\n",
-		   icache_size >> 10,
-		   boot_cpu_data.icache.ways,
-		   boot_cpu_data.icache.sets,
-		   boot_cpu_data.icache.linesz);
-	seq_printf(m, "d-cache\t\t: %dK (%u ways x %u sets x %u)\n",
-		   dcache_size >> 10,
-		   boot_cpu_data.dcache.ways,
-		   boot_cpu_data.dcache.sets,
-		   boot_cpu_data.dcache.linesz);
-
-	seq_printf(m, "features\t:");
-	for (i = 0; i < ARRAY_SIZE(cpu_feature_flags); i++)
-		if (boot_cpu_data.features & (1 << i))
-			seq_printf(m, " %s", cpu_feature_flags[i]);
-
-	seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
-		   boot_cpu_data.loops_per_jiffy / (500000/HZ),
-		   (boot_cpu_data.loops_per_jiffy / (5000/HZ)) % 100);
-
-	return 0;
-}
-
-static void *c_start(struct seq_file *m, loff_t *pos)
-{
-	return *pos < 1 ? (void *)1 : NULL;
-}
-
-static void *c_next(struct seq_file *m, void *v, loff_t *pos)
-{
-	++*pos;
-	return NULL;
-}
-
-static void c_stop(struct seq_file *m, void *v)
-{
-
-}
-
-const struct seq_operations cpuinfo_op = {
-	.start	= c_start,
-	.next	= c_next,
-	.stop	= c_stop,
-	.show	= c_show
-};
-#endif /* CONFIG_PROC_FS */