diff options
| author | Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> | 2015-05-18 18:02:47 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2015-05-19 00:00:23 +0300 |
| commit | 60c06c4c6f85676a86826c7e9bbd727224a2795f (patch) | |
| tree | 0f84b7a8a1e9b00f360d09bad4d0cb9cd6148d39 /arch/arm/mach-sa1100 | |
| parent | a657d7f679e841664c132cb691ffa44a6cd0bdb3 (diff) | |
| download | linux-60c06c4c6f85676a86826c7e9bbd727224a2795f.tar.xz | |
ARM: 8363/1: sa1100: use ioremapped memory to access SC registers
Use ioremap() and readl/writel_relaxed() to access IRQ controller
registers.
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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/irq.c | 52 |
1 files changed, 34 insertions, 18 deletions
diff --git a/arch/arm/mach-sa1100/irq.c b/arch/arm/mach-sa1100/irq.c index 6afaa333050b..08f929efddbc 100644 --- a/arch/arm/mach-sa1100/irq.c +++ b/arch/arm/mach-sa1100/irq.c @@ -20,13 +20,19 @@ #include <soc/sa1100/pwer.h> -#include <mach/hardware.h> #include <mach/irqs.h> -#include <asm/mach/irq.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; /* * We don't need to ACK IRQs on the SA1100 unless they're GPIOs @@ -34,12 +40,20 @@ */ static void sa1100_mask_irq(struct irq_data *d) { - ICMR &= ~BIT(d->hwirq); + 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) { - ICMR |= BIT(d->hwirq); + 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) @@ -87,16 +101,14 @@ static int sa1100irq_suspend(void) struct sa1100irq_state *st = &sa1100irq_state; st->saved = 1; - st->icmr = ICMR; - st->iclr = ICLR; - st->iccr = ICCR; + st->icmr = readl_relaxed(iobase + ICMR); + st->iclr = readl_relaxed(iobase + ICLR); + st->iccr = readl_relaxed(iobase + ICCR); /* * Disable all GPIO-based interrupts. */ - ICMR &= ~(IC_GPIO11_27|IC_GPIO10|IC_GPIO9|IC_GPIO8|IC_GPIO7| - IC_GPIO6|IC_GPIO5|IC_GPIO4|IC_GPIO3|IC_GPIO2| - IC_GPIO1|IC_GPIO0); + writel_relaxed(st->icmr & 0xfffff000, iobase + ICMR); return 0; } @@ -106,10 +118,10 @@ static void sa1100irq_resume(void) struct sa1100irq_state *st = &sa1100irq_state; if (st->saved) { - ICCR = st->iccr; - ICLR = st->iclr; + writel_relaxed(st->iccr, iobase + ICCR); + writel_relaxed(st->iclr, iobase + ICLR); - ICMR = st->icmr; + writel_relaxed(st->icmr, iobase + ICMR); } } @@ -132,8 +144,8 @@ sa1100_handle_irq(struct pt_regs *regs) uint32_t icip, icmr, mask; do { - icip = (ICIP); - icmr = (ICMR); + icip = readl_relaxed(iobase + ICIP); + icmr = readl_relaxed(iobase + ICMR); mask = icip & icmr; if (mask == 0) @@ -148,17 +160,21 @@ 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 */ - ICMR = 0; + writel_relaxed(0, iobase + ICMR); /* all IRQs are IRQ, not FIQ */ - ICLR = 0; + 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. */ - ICCR = 1; + writel_relaxed(1, iobase + ICCR); sa1100_normal_irqdomain = irq_domain_add_simple(NULL, 32, IRQ_GPIO0_SC, |