clocksource/drivers/h8300: Change to overflow interrupt

Counter overflow detection use for overflow interrupt

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

diff --git a/drivers/clocksource/h8300_timer16.c b/drivers/clocksource/h8300_timer16.c
index fc14a3f..b14a8da 100644 (file)
--- a/drivers/clocksource/h8300_timer16.c
+++ b/drivers/clocksource/h8300_timer16.c
@@ -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);