[AVR32] Remove unused file

Remove arch/avr32/mach-at32ap/sm.c, which is not referenced by
any Makefile.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

arch/avr32/mach-at32ap/sm.c

-/*
- * System Manager driver for AT32AP CPUs
- *
- * Copyright (C) 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/errno.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/platform_device.h>
-#include <linux/random.h>
-#include <linux/spinlock.h>
-
-#include <asm/intc.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-
-#include <asm/arch/sm.h>
-
-#include "sm.h"
-
-#define SM_EIM_IRQ_RESOURCE	1
-#define SM_PM_IRQ_RESOURCE	2
-#define SM_RTC_IRQ_RESOURCE	3
-
-#define to_eim(irqc) container_of(irqc, struct at32_sm, irqc)
-
-struct at32_sm system_manager;
-
-int __init at32_sm_init(void)
-{
-	struct resource *regs;
-	struct at32_sm *sm = &system_manager;
-	int ret = -ENXIO;
-
-	regs = platform_get_resource(&at32_sm_device, IORESOURCE_MEM, 0);
-	if (!regs)
-		goto fail;
-
-	spin_lock_init(&sm->lock);
-	sm->pdev = &at32_sm_device;
-
-	ret = -ENOMEM;
-	sm->regs = ioremap(regs->start, regs->end - regs->start + 1);
-	if (!sm->regs)
-		goto fail;
-
-	return 0;
-
-fail:
-	printk(KERN_ERR "Failed to initialize System Manager: %d\n", ret);
-	return ret;
-}
-
-/*
- * External Interrupt Module (EIM).
- *
- * EIM gets level- or edge-triggered interrupts of either polarity
- * from the outside and converts it to active-high level-triggered
- * interrupts that the internal interrupt controller can handle. EIM
- * also provides masking/unmasking of interrupts, as well as
- * acknowledging of edge-triggered interrupts.
- */
-
-static irqreturn_t spurious_eim_interrupt(int irq, void *dev_id,
-					  struct pt_regs *regs)
-{
-	printk(KERN_WARNING "Spurious EIM interrupt %d\n", irq);
-	disable_irq(irq);
-	return IRQ_NONE;
-}
-
-static struct irqaction eim_spurious_action = {
-	.handler = spurious_eim_interrupt,
-};
-
-static irqreturn_t eim_handle_irq(int irq, void *dev_id, struct pt_regs *regs)
-{
-	struct irq_controller * irqc = dev_id;
-	struct at32_sm *sm = to_eim(irqc);
-	unsigned long pending;
-
-	/*
-	 * No need to disable interrupts globally.  The interrupt
-	 * level relevant to this group must be masked all the time,
-	 * so we know that this particular EIM instance will not be
-	 * re-entered.
-	 */
-	spin_lock(&sm->lock);
-
-	pending = intc_get_pending(sm->irqc.irq_group);
-	if (unlikely(!pending)) {
-		printk(KERN_ERR "EIM (group %u): No interrupts pending!\n",
-		       sm->irqc.irq_group);
-		goto unlock;
-	}
-
-	do {
-		struct irqaction *action;
-		unsigned int i;
-
-		i = fls(pending) - 1;
-		pending &= ~(1 << i);
-		action = sm->action[i];
-
-		/* Acknowledge the interrupt */
-		sm_writel(sm, EIM_ICR, 1 << i);
-
-		spin_unlock(&sm->lock);
-
-		if (action->flags & SA_INTERRUPT)
-			local_irq_disable();
-		action->handler(sm->irqc.first_irq + i, action->dev_id, regs);
-		local_irq_enable();
-		spin_lock(&sm->lock);
-		if (action->flags & SA_SAMPLE_RANDOM)
-			add_interrupt_randomness(sm->irqc.first_irq + i);
-	} while (pending);
-
-unlock:
-	spin_unlock(&sm->lock);
-	return IRQ_HANDLED;
-}
-
-static void eim_mask(struct irq_controller *irqc, unsigned int irq)
-{
-	struct at32_sm *sm = to_eim(irqc);
-	unsigned int i;
-
-	i = irq - sm->irqc.first_irq;
-	sm_writel(sm, EIM_IDR, 1 << i);
-}
-
-static void eim_unmask(struct irq_controller *irqc, unsigned int irq)
-{
-	struct at32_sm *sm = to_eim(irqc);
-	unsigned int i;
-
-	i = irq - sm->irqc.first_irq;
-	sm_writel(sm, EIM_IER, 1 << i);
-}
-
-static int eim_setup(struct irq_controller *irqc, unsigned int irq,
-		struct irqaction *action)
-{
-	struct at32_sm *sm = to_eim(irqc);
-	sm->action[irq - sm->irqc.first_irq] = action;
-	/* Acknowledge earlier interrupts */
-	sm_writel(sm, EIM_ICR, (1<<(irq - sm->irqc.first_irq)));
-	eim_unmask(irqc, irq);
-	return 0;
-}
-
-static void eim_free(struct irq_controller *irqc, unsigned int irq,
-		void *dev)
-{
-	struct at32_sm *sm = to_eim(irqc);
-	eim_mask(irqc, irq);
-	sm->action[irq - sm->irqc.first_irq] = &eim_spurious_action;
-}
-
-static int eim_set_type(struct irq_controller *irqc, unsigned int irq,
-			unsigned int type)
-{
-	struct at32_sm *sm = to_eim(irqc);
-	unsigned long flags;
-	u32 value, pattern;
-
-	spin_lock_irqsave(&sm->lock, flags);
-
-	pattern = 1 << (irq - sm->irqc.first_irq);
-
-	value = sm_readl(sm, EIM_MODE);
-	if (type & IRQ_TYPE_LEVEL)
-		value |= pattern;
-	else
-		value &= ~pattern;
-	sm_writel(sm, EIM_MODE, value);
-	value = sm_readl(sm, EIM_EDGE);
-	if (type & IRQ_EDGE_RISING)
-		value |= pattern;
-	else
-		value &= ~pattern;
-	sm_writel(sm, EIM_EDGE, value);
-	value = sm_readl(sm, EIM_LEVEL);
-	if (type & IRQ_LEVEL_HIGH)
-		value |= pattern;
-	else
-		value &= ~pattern;
-	sm_writel(sm, EIM_LEVEL, value);
-
-	spin_unlock_irqrestore(&sm->lock, flags);
-
-	return 0;
-}
-
-static unsigned int eim_get_type(struct irq_controller *irqc,
-				 unsigned int irq)
-{
-	struct at32_sm *sm = to_eim(irqc);
-	unsigned long flags;
-	unsigned int type = 0;
-	u32 mode, edge, level, pattern;
-
-	pattern = 1 << (irq - sm->irqc.first_irq);
-
-	spin_lock_irqsave(&sm->lock, flags);
-	mode = sm_readl(sm, EIM_MODE);
-	edge = sm_readl(sm, EIM_EDGE);
-	level = sm_readl(sm, EIM_LEVEL);
-	spin_unlock_irqrestore(&sm->lock, flags);
-
-	if (mode & pattern)
-		type |= IRQ_TYPE_LEVEL;
-	if (edge & pattern)
-		type |= IRQ_EDGE_RISING;
-	if (level & pattern)
-		type |= IRQ_LEVEL_HIGH;
-
-	return type;
-}
-
-static struct irq_controller_class eim_irq_class = {
-	.typename	= "EIM",
-	.handle		= eim_handle_irq,
-	.setup		= eim_setup,
-	.free		= eim_free,
-	.mask		= eim_mask,
-	.unmask		= eim_unmask,
-	.set_type	= eim_set_type,
-	.get_type	= eim_get_type,
-};
-
-static int __init eim_init(void)
-{
-	struct at32_sm *sm = &system_manager;
-	unsigned int i;
-	u32 pattern;
-	int ret;
-
-	/*
-	 * The EIM is really the same module as SM, so register
-	 * mapping, etc. has been taken care of already.
-	 */
-
-	/*
-	 * Find out how many interrupt lines that are actually
-	 * implemented in hardware.
-	 */
-	sm_writel(sm, EIM_IDR, ~0UL);
-	sm_writel(sm, EIM_MODE, ~0UL);
-	pattern = sm_readl(sm, EIM_MODE);
-	sm->irqc.nr_irqs = fls(pattern);
-
-	ret = -ENOMEM;
-	sm->action = kmalloc(sizeof(*sm->action) * sm->irqc.nr_irqs,
-			     GFP_KERNEL);
-	if (!sm->action)
-		goto out;
-
-	for (i = 0; i < sm->irqc.nr_irqs; i++)
-		sm->action[i] = &eim_spurious_action;
-
-	spin_lock_init(&sm->lock);
-	sm->irqc.irq_group = sm->pdev->resource[SM_EIM_IRQ_RESOURCE].start;
-	sm->irqc.class = &eim_irq_class;
-
-	ret = intc_register_controller(&sm->irqc);
-	if (ret < 0)
-		goto out_free_actions;
-
-	printk("EIM: External Interrupt Module at 0x%p, IRQ group %u\n",
-	       sm->regs, sm->irqc.irq_group);
-	printk("EIM: Handling %u external IRQs, starting with IRQ%u\n",
-	       sm->irqc.nr_irqs, sm->irqc.first_irq);
-
-	return 0;
-
-out_free_actions:
-	kfree(sm->action);
-out:
-	return ret;
-}
-arch_initcall(eim_init);