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>

1 files changed, 0 insertions, 25 deletions

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