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Date: Fri, 23 May 2014 12:31:00 +0200
From: Daniel Lezcano <daniel.lezcano@...aro.org>
To: tglx@...utronix.de, mingo@...nel.org
Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 20/71] clocksource: sh_cmt: Request IRQ for clock event device only
From: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
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@...asonboard.com>
---
drivers/clocksource/sh_cmt.c | 51 ++++++++++++++++++++++--------------------
1 file changed, 27 insertions(+), 24 deletions(-)
diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c
index 9f215e7..bc8d025 100644
--- 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;
}
--
1.7.9.5
--
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