aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/mach-sa1100
diff options
context:
space:
mode:
authorDmitry Eremin-Solenikov <dbaryshkov@gmail.com>2015-05-19 16:17:09 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2015-05-28 14:40:03 +0100
commit22b67acd99c00e3fdc66869cd43fd539bab0ef8c (patch)
treedf3369d810b9b84355bcc540519c7312c629f880 /arch/arm/mach-sa1100
parent85e6f09785bd06f0510bdb00c40772c7f8da3c43 (diff)
downloadlinux-linaro-stable-22b67acd99c00e3fdc66869cd43fd539bab0ef8c.tar.gz
ARM: 8368/1: sa1100: move irq driver to drivers/irqchip/
Move current sa11x0 IRQ driver to the irqchip subsystem. Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-sa1100')
-rw-r--r--arch/arm/mach-sa1100/Makefile2
-rw-r--r--arch/arm/mach-sa1100/irq.c177
2 files changed, 1 insertions, 178 deletions
diff --git a/arch/arm/mach-sa1100/Makefile b/arch/arm/mach-sa1100/Makefile
index 61ff91e76e0a..ebc4d58e1a32 100644
--- a/arch/arm/mach-sa1100/Makefile
+++ b/arch/arm/mach-sa1100/Makefile
@@ -3,7 +3,7 @@
#
# Common support
-obj-y := clock.o generic.o irq.o #nmi-oopser.o
+obj-y := clock.o generic.o #nmi-oopser.o
# Specific board support
obj-$(CONFIG_SA1100_ASSABET) += assabet.o
diff --git a/arch/arm/mach-sa1100/irq.c b/arch/arm/mach-sa1100/irq.c
deleted file mode 100644
index fdec5edbbfd5..000000000000
--- a/arch/arm/mach-sa1100/irq.c
+++ /dev/null
@@ -1,177 +0,0 @@
-/*
- * linux/arch/arm/mach-sa1100/irq.c
- *
- * Copyright (C) 2015 Dmitry Eremin-Solenikov
- * Copyright (C) 1999-2001 Nicolas Pitre
- *
- * Generic IRQ handling for the SA11x0.
- *
- * 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/module.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/irqdomain.h>
-#include <linux/syscore_ops.h>
-#include <linux/irqchip/irq-sa11x0.h>
-
-#include <soc/sa1100/pwer.h>
-
-#include <asm/exception.h>
-
-#define ICIP 0x00 /* IC IRQ Pending reg. */
-#define ICMR 0x04 /* IC Mask Reg. */
-#define ICLR 0x08 /* IC Level Reg. */
-#define ICCR 0x0C /* IC Control Reg. */
-#define ICFP 0x10 /* IC FIQ Pending reg. */
-#define ICPR 0x20 /* IC Pending Reg. */
-
-static void __iomem *iobase;
-
-/*
- * We don't need to ACK IRQs on the SA1100 unless they're GPIOs
- * this is for internal IRQs i.e. from IRQ LCD to RTCAlrm.
- */
-static void sa1100_mask_irq(struct irq_data *d)
-{
- u32 reg;
-
- reg = readl_relaxed(iobase + ICMR);
- reg &= ~BIT(d->hwirq);
- writel_relaxed(reg, iobase + ICMR);
-}
-
-static void sa1100_unmask_irq(struct irq_data *d)
-{
- u32 reg;
-
- reg = readl_relaxed(iobase + ICMR);
- reg |= BIT(d->hwirq);
- writel_relaxed(reg, iobase + ICMR);
-}
-
-static int sa1100_set_wake(struct irq_data *d, unsigned int on)
-{
- return sa11x0_sc_set_wake(d->hwirq, on);
-}
-
-static struct irq_chip sa1100_normal_chip = {
- .name = "SC",
- .irq_ack = sa1100_mask_irq,
- .irq_mask = sa1100_mask_irq,
- .irq_unmask = sa1100_unmask_irq,
- .irq_set_wake = sa1100_set_wake,
-};
-
-static int sa1100_normal_irqdomain_map(struct irq_domain *d,
- unsigned int irq, irq_hw_number_t hwirq)
-{
- irq_set_chip_and_handler(irq, &sa1100_normal_chip,
- handle_level_irq);
- set_irq_flags(irq, IRQF_VALID);
-
- return 0;
-}
-
-static struct irq_domain_ops sa1100_normal_irqdomain_ops = {
- .map = sa1100_normal_irqdomain_map,
- .xlate = irq_domain_xlate_onetwocell,
-};
-
-static struct irq_domain *sa1100_normal_irqdomain;
-
-static struct sa1100irq_state {
- unsigned int saved;
- unsigned int icmr;
- unsigned int iclr;
- unsigned int iccr;
-} sa1100irq_state;
-
-static int sa1100irq_suspend(void)
-{
- struct sa1100irq_state *st = &sa1100irq_state;
-
- st->saved = 1;
- st->icmr = readl_relaxed(iobase + ICMR);
- st->iclr = readl_relaxed(iobase + ICLR);
- st->iccr = readl_relaxed(iobase + ICCR);
-
- /*
- * Disable all GPIO-based interrupts.
- */
- writel_relaxed(st->icmr & 0xfffff000, iobase + ICMR);
-
- return 0;
-}
-
-static void sa1100irq_resume(void)
-{
- struct sa1100irq_state *st = &sa1100irq_state;
-
- if (st->saved) {
- writel_relaxed(st->iccr, iobase + ICCR);
- writel_relaxed(st->iclr, iobase + ICLR);
-
- writel_relaxed(st->icmr, iobase + ICMR);
- }
-}
-
-static struct syscore_ops sa1100irq_syscore_ops = {
- .suspend = sa1100irq_suspend,
- .resume = sa1100irq_resume,
-};
-
-static int __init sa1100irq_init_devicefs(void)
-{
- register_syscore_ops(&sa1100irq_syscore_ops);
- return 0;
-}
-
-device_initcall(sa1100irq_init_devicefs);
-
-static asmlinkage void __exception_irq_entry
-sa1100_handle_irq(struct pt_regs *regs)
-{
- uint32_t icip, icmr, mask;
-
- do {
- icip = readl_relaxed(iobase + ICIP);
- icmr = readl_relaxed(iobase + ICMR);
- mask = icip & icmr;
-
- if (mask == 0)
- break;
-
- handle_domain_irq(sa1100_normal_irqdomain,
- ffs(mask) - 1, regs);
- } while (1);
-}
-
-void __init sa11x0_init_irq_nodt(int irq_start, resource_size_t io_start)
-{
- iobase = ioremap(io_start, SZ_64K);
- if (WARN_ON(!iobase))
- return;
-
- /* disable all IRQs */
- writel_relaxed(0, iobase + ICMR);
-
- /* all IRQs are IRQ, not FIQ */
- writel_relaxed(0, iobase + ICLR);
-
- /*
- * Whatever the doc says, this has to be set for the wait-on-irq
- * instruction to work... on a SA1100 rev 9 at least.
- */
- writel_relaxed(1, iobase + ICCR);
-
- sa1100_normal_irqdomain = irq_domain_add_simple(NULL,
- 32, irq_start,
- &sa1100_normal_irqdomain_ops, NULL);
-
- set_handle_irq(sa1100_handle_irq);
-}