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Message-Id: <1421316574-10022-5-git-send-email-dbaryshkov@gmail.com>
Date: Thu, 15 Jan 2015 13:09:34 +0300
From: Dmitry Eremin-Solenikov <dbaryshkov@...il.com>
To: Russell King <linux@....linux.org.uk>,
Thomas Gleixner <tglx@...utronix.de>,
Jason Cooper <jason@...edaemon.net>
Cc: Linus Walleij <linus.walleij@...aro.org>,
Andrea Adami <andrea.adami@...il.com>,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 5/5] ARM: sa1100: drop irq driver
Drop irq driver for sa1100 in favour of irqchip driver replacement.
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@...il.com>
---
arch/arm/mach-sa1100/Makefile | 2 +-
arch/arm/mach-sa1100/generic.c | 13 +++
arch/arm/mach-sa1100/irq.c | 195 -----------------------------------------
3 files changed, 14 insertions(+), 196 deletions(-)
delete mode 100644 arch/arm/mach-sa1100/irq.c
diff --git a/arch/arm/mach-sa1100/Makefile b/arch/arm/mach-sa1100/Makefile
index 61ff91e..ebc4d58 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/generic.c b/arch/arm/mach-sa1100/generic.c
index 022e451..3fdc16b 100644
--- a/arch/arm/mach-sa1100/generic.c
+++ b/arch/arm/mach-sa1100/generic.c
@@ -20,6 +20,7 @@
#include <linux/ioport.h>
#include <linux/platform_device.h>
#include <linux/reboot.h>
+#include <linux/irqchip/irq-sa11x0.h>
#include <video/sa1100fb.h>
@@ -375,6 +376,18 @@ void __init sa1100_timer_init(void)
pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x90000000), 3686400);
}
+static struct resource irq_resource =
+ DEFINE_RES_MEM_NAMED(0x90050000, SZ_64K, "irqs");
+
+void __init sa1100_init_irq(void)
+{
+ request_resource(&iomem_resource, &irq_resource);
+
+ sa11x0_init_irq_nodt(IRQ_GPIO0_SC, irq_resource.start);
+
+ sa1100_init_gpio();
+}
+
/*
* Disable the memory bus request/grant signals on the SA1110 to
* ensure that we don't receive spurious memory requests. We set
diff --git a/arch/arm/mach-sa1100/irq.c b/arch/arm/mach-sa1100/irq.c
deleted file mode 100644
index 66464fd..0000000
--- a/arch/arm/mach-sa1100/irq.c
+++ /dev/null
@@ -1,195 +0,0 @@
-/*
- * linux/arch/arm/mach-sa1100/irq.c
- *
- * Copyright (C) 1999-2001 Nicolas Pitre
- *
- * Generic IRQ handling for the SA11x0, GPIO 11-27 IRQ demultiplexing.
- *
- * 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/ioport.h>
-#include <linux/syscore_ops.h>
-
-#include <mach/irqs.h>
-#include <asm/exception.h>
-
-#include "generic.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;
-static DEFINE_RAW_SPINLOCK(lock);
-
-/*
- * 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;
- unsigned long flags;
-
- raw_spin_lock_irqsave(&lock, flags);
-
- reg = readl_relaxed(iobase + ICMR);
- reg &= ~BIT(d->hwirq);
- writel_relaxed(reg, iobase + ICMR);
-
- raw_spin_unlock_irqrestore(&lock, flags);
-}
-
-static void sa1100_unmask_irq(struct irq_data *d)
-{
- u32 reg;
- unsigned long flags;
-
- raw_spin_lock_irqsave(&lock, flags);
-
- reg = readl_relaxed(iobase + ICMR);
- reg |= BIT(d->hwirq);
- writel_relaxed(reg, iobase + ICMR);
-
- raw_spin_unlock_irqrestore(&lock, flags);
-}
-
-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 resource irq_resource =
- DEFINE_RES_MEM_NAMED(0x90050000, SZ_64K, "irqs");
-
-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 sa1100_init_irq(void)
-{
- request_resource(&iomem_resource, &irq_resource);
-
- iobase = ioremap(irq_resource.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_GPIO0_SC,
- &sa1100_normal_irqdomain_ops, NULL);
-
- set_handle_irq(sa1100_handle_irq);
-
- sa1100_init_gpio();
-}
--
2.1.4
--
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