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Commit 2a0ff877 authored by Yoshinori Sato's avatar Yoshinori Sato Committed by Daniel Lezcano
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clocksource/drivers/h8300: Change to overflow interrupt 



Counter overflow detection use for overflow interrupt

Signed-off-by: default avatarYoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: default avatarDaniel Lezcano <daniel.lezcano@linaro.org>
parent d662ed20

drivers/clocksource/h8300_timer16.c

+7 −7
Original line number Diff line number Diff line
@@ -14,7 +14,6 @@ 
#include <linux/of_irq.h>



#define TSTR	0

#define TISRA	4

#define TISRC	6



#define TCR	0
@@ -27,9 +26,8 @@ struct timer16_priv { 
	void __iomem *mapcommon;

	unsigned short cs_enabled;

	unsigned char enb;

	unsigned char imfa;

	unsigned char imiea;

	unsigned char ovf;

	unsigned char ovie;

	struct clk *clk;

};
@@ -59,8 +57,8 @@ static irqreturn_t timer16_interrupt(int irq, void *dev_id) 
{

	struct timer16_priv *p = (struct timer16_priv *)dev_id;



	writeb(readb(p->mapcommon + TISRA) & ~p->imfa,

		  p->mapcommon + TISRA);

	writeb(readb(p->mapcommon + TISRC) & ~p->ovf,

		  p->mapcommon + TISRC);

	p->total_cycles += 0x10000;



	return IRQ_HANDLED;
@@ -93,6 +91,8 @@ static int timer16_enable(struct clocksource *cs) 
	writeb(0x83, p->mapbase + TCR);

	writeb(readb(p->mapcommon + TSTR) | p->enb,

		  p->mapcommon + TSTR);

	writeb(readb(p->mapcommon + TISRC) | p->ovie,

		  p->mapcommon + TSTR);



	p->cs_enabled = true;

	return 0;
@@ -161,8 +161,8 @@ static void __init h8300_16timer_init(struct device_node *node) 
	timer16_priv.mapbase = base[REG_CH];

	timer16_priv.mapcommon = base[REG_COMM];

	timer16_priv.enb = 1 << ch;

	timer16_priv.imfa = 1 << ch;

	timer16_priv.imiea = 1 << (4 + ch);

	timer16_priv.ovf = 1 << ch;

	timer16_priv.ovie = 1 << (4 + ch);



	ret = request_irq(irq, timer16_interrupt,

			  IRQF_TIMER, timer16_priv.cs.name, &timer16_priv);