From: Yauhen Kharuzhy <jekhor@gmail.com>
To: Jaya Kumar <jayakumar.lkml@gmail.com>
Cc: "linux-fbdev-devel@lists.sourceforge.net"
<linux-fbdev-devel@lists.sourceforge.net>
Subject: Re: [jekhor@gmail.com: Metronome specifications]
Date: Wed, 31 Dec 2008 14:59:36 +0200 [thread overview]
Message-ID: <20081231125936.GA18373@jeknote.loshitsa1.net> (raw)
In-Reply-To: <20081231121659.GA1761@jeknote.loshitsa1.net>
And another question: why IRQF_TRIGGER_FALLING is used in IRQ
configuration? As I understood, RDY signal is active with high level,
and using of IRQF_TRIGGER_RISING will be reasonable.
From am200epd.c:
static int am200_setup_irq(struct fb_info *info)
{
int ret;
ret = request_irq(IRQ_GPIO(RDY_GPIO_PIN), am200_handle_irq,
IRQF_DISABLED|IRQF_TRIGGER_FALLING,
"AM200", info->par);
if (ret)
dev_err(&am200_device->dev, "request_irq failed: %d\n", ret);
return ret;
}
static irqreturn_t am200_handle_irq(int irq, void *dev_id)
{
struct metronomefb_par *par = dev_id;
wake_up_interruptible(&par->waitq);
return IRQ_HANDLED;
}
static int am200_wait_event(struct metronomefb_par *par)
{
return wait_event_timeout(par->waitq, gpio_get_value(RDY_GPIO_PIN), HZ);
}
--
Yauhen Kharuzhy jekhor _at_ gmail.com
JID: jek@jabber.ru
A: No
Q: Should I quote below my post?
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next prev parent reply other threads:[~2008-12-31 12:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20081230154614.GA30164@jeknote.loshitsa1.net>
2008-12-30 15:56 ` [jekhor@gmail.com: Metronome specifications] Jaya Kumar
2008-12-31 12:16 ` Yauhen Kharuzhy
2008-12-31 12:59 ` Yauhen Kharuzhy [this message]
2008-12-31 14:16 ` Yauhen Kharuzhy
2008-12-31 20:42 ` Jaya Kumar
2008-12-31 20:38 ` Jaya Kumar
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