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ARM: EXYNOS4: Add chained enrty/exit function to uart interrupt handler 

This patch adds chained IRQ enter/exit functions to uart
interrupt handler in order to function correctly on primary
controllers with different methods of flow control.

Signed-off-by: Changhwan Youn <chaos.youn@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Changhwan Youn 2011-07-16 10:49:57 +09:00 committed by Kukjin Kim
parent 069d4e743c
commit 55981f7b3c
1 changed files with 7 additions and 0 deletions
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7
arch/arm/plat-samsung/irq-uart.c
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@ -19,6 +19,8 @@
#include <linux/irq.h>
#include <linux/io.h>
#include <asm/mach/irq.h>
#include <mach/map.h>
#include <plat/irq-uart.h>
#include <plat/regs-serial.h>
@ -30,9 +32,12 @@
static void s3c_irq_demux_uart(unsigned int irq, struct irq_desc *desc)
{
struct s3c_uart_irq *uirq = desc->irq_data.handler_data;
struct irq_chip *chip = irq_get_chip(irq);
u32 pend = __raw_readl(uirq->regs + S3C64XX_UINTP);
int base = uirq->base_irq;
chained_irq_enter(chip, desc);
if (pend & (1 << 0))
generic_handle_irq(base);
if (pend & (1 << 1))
@ -41,6 +46,8 @@ static void s3c_irq_demux_uart(unsigned int irq, struct irq_desc *desc)
generic_handle_irq(base + 2);
if (pend & (1 << 3))
generic_handle_irq(base + 3);
chained_irq_exit(chip, desc);
}
static void __init s3c_init_uart_irq(struct s3c_uart_irq *uirq)