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, 200 deletions

diff --git a/arch/avr32/mach-at32ap/intc.c b/arch/avr32/mach-at32ap/intc.c
deleted file mode 100644
index aaff83cc50f0..000000000000
--- a/arch/avr32/mach-at32ap/intc.c
+++ /dev/null
@@ -1,200 +0,0 @@
-/*
- * Copyright (C) 2006, 2008 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/clk.h>
-#include <linux/err.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/platform_device.h>
-#include <linux/syscore_ops.h>
-#include <linux/export.h>
-
-#include <asm/io.h>
-
-#include "intc.h"
-
-struct intc {
-	void __iomem		*regs;
-	struct irq_chip		chip;
-#ifdef CONFIG_PM
-	unsigned long		suspend_ipr;
-	unsigned long		saved_ipr[64];
-#endif
-};
-
-extern struct platform_device at32_intc0_device;
-
-/*
- * TODO: We may be able to implement mask/unmask by setting IxM flags
- * in the status register.
- */
-static void intc_mask_irq(struct irq_data *d)
-{
-
-}
-
-static void intc_unmask_irq(struct irq_data *d)
-{
-
-}
-
-static struct intc intc0 = {
-	.chip = {
-		.name		= "intc",
-		.irq_mask	= intc_mask_irq,
-		.irq_unmask	= intc_unmask_irq,
-	},
-};
-
-/*
- * All interrupts go via intc at some point.
- */
-asmlinkage void do_IRQ(int level, struct pt_regs *regs)
-{
-	struct pt_regs *old_regs;
-	unsigned int irq;
-	unsigned long status_reg;
-
-	local_irq_disable();
-
-	old_regs = set_irq_regs(regs);
-
-	irq_enter();
-
-	irq = intc_readl(&intc0, INTCAUSE0 - 4 * level);
-	generic_handle_irq(irq);
-
-	/*
-	 * Clear all interrupt level masks so that we may handle
-	 * interrupts during softirq processing.  If this is a nested
-	 * interrupt, interrupts must stay globally disabled until we
-	 * return.
-	 */
-	status_reg = sysreg_read(SR);
-	status_reg &= ~(SYSREG_BIT(I0M) | SYSREG_BIT(I1M)
-			| SYSREG_BIT(I2M) | SYSREG_BIT(I3M));
-	sysreg_write(SR, status_reg);
-
-	irq_exit();
-
-	set_irq_regs(old_regs);
-}
-
-void __init init_IRQ(void)
-{
-	extern void _evba(void);
-	extern void irq_level0(void);
-	struct resource *regs;
-	struct clk *pclk;
-	unsigned int i;
-	u32 offset, readback;
-
-	regs = platform_get_resource(&at32_intc0_device, IORESOURCE_MEM, 0);
-	if (!regs) {
-		printk(KERN_EMERG "intc: no mmio resource defined\n");
-		goto fail;
-	}
-	pclk = clk_get(&at32_intc0_device.dev, "pclk");
-	if (IS_ERR(pclk)) {
-		printk(KERN_EMERG "intc: no clock defined\n");
-		goto fail;
-	}
-
-	clk_enable(pclk);
-
-	intc0.regs = ioremap(regs->start, resource_size(regs));
-	if (!intc0.regs) {
-		printk(KERN_EMERG "intc: failed to map registers (0x%08lx)\n",
-		       (unsigned long)regs->start);
-		goto fail;
-	}
-
-	/*
-	 * Initialize all interrupts to level 0 (lowest priority). The
-	 * priority level may be changed by calling
-	 * irq_set_priority().
-	 *
-	 */
-	offset = (unsigned long)&irq_level0 - (unsigned long)&_evba;
-	for (i = 0; i < NR_INTERNAL_IRQS; i++) {
-		intc_writel(&intc0, INTPR0 + 4 * i, offset);
-		readback = intc_readl(&intc0, INTPR0 + 4 * i);
-		if (readback == offset)
-			irq_set_chip_and_handler(i, &intc0.chip,
-						 handle_simple_irq);
-	}
-
-	/* Unmask all interrupt levels */
-	sysreg_write(SR, (sysreg_read(SR)
-			  & ~(SR_I3M | SR_I2M | SR_I1M | SR_I0M)));
-
-	return;
-
-fail:
-	panic("Interrupt controller initialization failed!\n");
-}
-
-#ifdef CONFIG_PM
-void intc_set_suspend_handler(unsigned long offset)
-{
-	intc0.suspend_ipr = offset;
-}
-
-static int intc_suspend(void)
-{
-	int i;
-
-	if (unlikely(!irqs_disabled())) {
-		pr_err("intc_suspend: called with interrupts enabled\n");
-		return -EINVAL;
-	}
-
-	if (unlikely(!intc0.suspend_ipr)) {
-		pr_err("intc_suspend: suspend_ipr not initialized\n");
-		return -EINVAL;
-	}
-
-	for (i = 0; i < 64; i++) {
-		intc0.saved_ipr[i] = intc_readl(&intc0, INTPR0 + 4 * i);
-		intc_writel(&intc0, INTPR0 + 4 * i, intc0.suspend_ipr);
-	}
-
-	return 0;
-}
-
-static void intc_resume(void)
-{
-	int i;
-
-	for (i = 0; i < 64; i++)
-		intc_writel(&intc0, INTPR0 + 4 * i, intc0.saved_ipr[i]);
-}
-#else
-#define intc_suspend	NULL
-#define intc_resume	NULL
-#endif
-
-static struct syscore_ops intc_syscore_ops = {
-	.suspend	= intc_suspend,
-	.resume		= intc_resume,
-};
-
-static int __init intc_init_syscore(void)
-{
-	register_syscore_ops(&intc_syscore_ops);
-
-	return 0;
-}
-device_initcall(intc_init_syscore);
-
-unsigned long intc_get_pending(unsigned int group)
-{
-	return intc_readl(&intc0, INTREQ0 + 4 * group);
-}
-EXPORT_SYMBOL_GPL(intc_get_pending);