clocksource: sh_cmt: Request IRQ for clock event device only

Clock sources don't need an IRQ, request the IRQ only for channels used
as clock event devices.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c
index 9f215e7..bc8d025 100644 (file)
--- a/drivers/clocksource/sh_cmt.c
+++ b/drivers/clocksource/sh_cmt.c
@@ -785,10 +785,28 @@ static void sh_cmt_clock_event_resume(struct clock_event_device *ced)
        pm_genpd_syscore_poweron(&ch->cmt->pdev->dev);
 }
 
-static void sh_cmt_register_clockevent(struct sh_cmt_channel *ch,
-                                      const char *name)
+static int sh_cmt_register_clockevent(struct sh_cmt_channel *ch,
+                                     const char *name)
 {
        struct clock_event_device *ced = &ch->ced;
+       int irq;
+       int ret;
+
+       irq = platform_get_irq(ch->cmt->pdev, ch->cmt->legacy ? 0 : ch->index);
+       if (irq < 0) {
+               dev_err(&ch->cmt->pdev->dev, "ch%u: failed to get irq\n",
+                       ch->index);
+               return irq;
+       }
+
+       ret = request_irq(irq, sh_cmt_interrupt,
+                         IRQF_TIMER | IRQF_IRQPOLL | IRQF_NOBALANCING,
+                         dev_name(&ch->cmt->pdev->dev), ch);
+       if (ret) {
+               dev_err(&ch->cmt->pdev->dev, "ch%u: failed to request irq %d\n",
+                       ch->index, irq);
+               return ret;
+       }
 
        ced->name = name;
        ced->features = CLOCK_EVT_FEAT_PERIODIC;
@@ -803,14 +821,20 @@ static void sh_cmt_register_clockevent(struct sh_cmt_channel *ch,
        dev_info(&ch->cmt->pdev->dev, "ch%u: used for clock events\n",
                 ch->index);
        clockevents_register_device(ced);
+
+       return 0;
 }
 
 static int sh_cmt_register(struct sh_cmt_channel *ch, const char *name,
                           bool clockevent, bool clocksource)
 {
+       int ret;
+
        if (clockevent) {
                ch->cmt->has_clockevent = true;
-               sh_cmt_register_clockevent(ch, name);
+               ret = sh_cmt_register_clockevent(ch, name);
+               if (ret < 0)
+                       return ret;
        }
 
        if (clocksource) {
@@ -825,7 +849,6 @@ static int sh_cmt_setup_channel(struct sh_cmt_channel *ch, unsigned int index,
                                unsigned int hwidx, bool clockevent,
                                bool clocksource, struct sh_cmt_device *cmt)
 {
-       int irq;
        int ret;
 
        /* Skip unused channels. */
@@ -869,17 +892,6 @@ static int sh_cmt_setup_channel(struct sh_cmt_channel *ch, unsigned int index,
                }
        }
 
-       if (cmt->legacy)
-               irq = platform_get_irq(cmt->pdev, 0);
-       else
-               irq = platform_get_irq(cmt->pdev, ch->index);
-
-       if (irq < 0) {
-               dev_err(&cmt->pdev->dev, "ch%u: failed to get irq\n",
-                       ch->index);
-               return irq;
-       }
-
        if (cmt->info->width == (sizeof(ch->max_match_value) * 8))
                ch->max_match_value = ~0;
        else
@@ -904,15 +916,6 @@ static int sh_cmt_setup_channel(struct sh_cmt_channel *ch, unsigned int index,
        }
        ch->cs_enabled = false;
 
-       ret = request_irq(irq, sh_cmt_interrupt,
-                         IRQF_TIMER | IRQF_IRQPOLL | IRQF_NOBALANCING,
-                         dev_name(&cmt->pdev->dev), ch);
-       if (ret) {
-               dev_err(&cmt->pdev->dev, "ch%u: failed to request irq %d\n",
-                       ch->index, irq);
-               return ret;
-       }
-
        return 0;
 }