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Commit 55981f7b authored by Changhwan Youn's avatar Changhwan Youn Committed by Kukjin Kim
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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: default avatarChanghwan Youn <chaos.youn@samsung.com>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
parent 069d4e74

arch/arm/plat-samsung/irq-uart.c

+7 −0
Original line number Diff line number Diff line
@@ -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)