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| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2013-11-04 12:17:02 +0400 |
|---|---|---|
| committer | Shawn Guo <shawn.guo@linaro.org> | 2013-12-09 09:18:25 +0400 |
| commit | 81efe0fc67c72ca13eb402cc6de5c79f0f258932 (patch) | |
| tree | a18c3792b71dbb2f19b156b10a236cf573242536 /arch/arm/mach-imx | |
| parent | 5a269d22848777ad088e2d7883861cedc64972cf (diff) | |
| download | linux-81efe0fc67c72ca13eb402cc6de5c79f0f258932.tar.xz | |
ARM: imx: drop support for irq priorisation
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>
Diffstat (limited to 'arch/arm/mach-imx')
| -rw-r--r-- | arch/arm/mach-imx/Kconfig | 10 | ||||
| -rw-r--r-- | arch/arm/mach-imx/avic.c | 25 | ||||
| -rw-r--r-- | arch/arm/mach-imx/irq-common.h | 1 |
3 files changed, 0 insertions, 36 deletions
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig index 15c9ae368b58..94317294b41e 100644 --- a/arch/arm/mach-imx/Kconfig +++ b/arch/arm/mach-imx/Kconfig @@ -20,16 +20,6 @@ config ARCH_MXC menu "Freescale i.MX support" 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 bool diff --git a/arch/arm/mach-imx/avic.c b/arch/arm/mach-imx/avic.c index e163ec7a8441..8d1df2e4b7ac 100644 --- a/arch/arm/mach-imx/avic.c +++ b/arch/arm/mach-imx/avic.c @@ -54,28 +54,6 @@ static void __iomem *avic_base; 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 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 = { -#ifdef CONFIG_MXC_IRQ_PRIOR - .set_priority = avic_irq_set_priority, -#endif #ifdef CONFIG_FIQ .set_irq_fiq = avic_set_irq_fiq, #endif diff --git a/arch/arm/mach-imx/irq-common.h b/arch/arm/mach-imx/irq-common.h index 5b2dabba330f..6e3175dc0c0a 100644 --- a/arch/arm/mach-imx/irq-common.h +++ b/arch/arm/mach-imx/irq-common.h @@ -24,7 +24,6 @@ struct mxc_extra_irq { - int (*set_priority)(unsigned char irq, unsigned char prio); int (*set_irq_fiq)(unsigned int irq, unsigned int type); }; |