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ARM: imx: drop support for irq priorisation

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The code for irq priorisation support doesn't have any in-tree users and
the Kconfig description does wrong promises because nowadays irq
handlers are called with irqs disabled, so no high prioritized irq can
interrupt a lower prioritized handler.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
This commit is contained in:
Uwe Kleine-König 2013-11-04 09:17:02 +01:00 committed by Shawn Guo
parent 5a269d2284
commit 81efe0fc67
3 changed files with 0 additions and 36 deletions
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10
arch/arm/mach-imx/Kconfig
View File

@ -20,16 +20,6 @@ config ARCH_MXC
menu "Freescale i.MX support" menu "Freescale i.MX support"
depends on ARCH_MXC depends on ARCH_MXC
config MXC_IRQ_PRIOR
bool "Use IRQ priority"
help
Select this if you want to use prioritized IRQ handling.
This feature prevents higher priority ISR to be interrupted
by lower priority IRQ.
This may be useful in embedded applications, where are strong
requirements for timing.
Say N here, unless you have a specialized requirement.
config MXC_TZIC config MXC_TZIC
bool bool

25
arch/arm/mach-imx/avic.c
View File

@ -54,28 +54,6 @@
static void __iomem *avic_base; static void __iomem *avic_base;
static struct irq_domain *domain; static struct irq_domain *domain;
#ifdef CONFIG_MXC_IRQ_PRIOR
static int avic_irq_set_priority(unsigned char irq, unsigned char prio)
{
struct irq_data *d = irq_get_irq_data(irq);
unsigned int temp;
unsigned int mask = 0x0F << irq % 8 * 4;
irq = d->hwirq;
if (irq >= AVIC_NUM_IRQS)
return -EINVAL;
temp = __raw_readl(avic_base + AVIC_NIPRIORITY(irq / 8));
temp &= ~mask;
temp |= prio & mask;
__raw_writel(temp, avic_base + AVIC_NIPRIORITY(irq / 8));
return 0;
}
#endif
#ifdef CONFIG_FIQ #ifdef CONFIG_FIQ
static int avic_set_irq_fiq(unsigned int irq, unsigned int type) static int avic_set_irq_fiq(unsigned int irq, unsigned int type)
{ {
@ -102,9 +80,6 @@ static int avic_set_irq_fiq(unsigned int irq, unsigned int type)
static struct mxc_extra_irq avic_extra_irq = { static struct mxc_extra_irq avic_extra_irq = {
#ifdef CONFIG_MXC_IRQ_PRIOR
.set_priority = avic_irq_set_priority,
#endif
#ifdef CONFIG_FIQ #ifdef CONFIG_FIQ
.set_irq_fiq = avic_set_irq_fiq, .set_irq_fiq = avic_set_irq_fiq,
#endif #endif

1
arch/arm/mach-imx/irq-common.h
View File

@ -24,7 +24,6 @@
struct mxc_extra_irq struct mxc_extra_irq
{ {
int (*set_priority)(unsigned char irq, unsigned char prio);
int (*set_irq_fiq)(unsigned int irq, unsigned int type); int (*set_irq_fiq)(unsigned int irq, unsigned int type);
}; };