linux-kernel - Re: [PATCH 07/11] x86, olpc-xo1-sci: Add GPE handler and ebook switch functionality

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Message-ID: <20110516090813.GA26487@linutronix.de>
Date:	Mon, 16 May 2011 11:08:13 +0200
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	Daniel Drake <dsd@...top.org>
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org, dilinger@...ued.net
Subject: Re: [PATCH 07/11] x86, olpc-xo1-sci: Add GPE handler and ebook
 switch functionality

* Daniel Drake | 2011-04-30 13:32:26 [+0100]:

>diff --git a/arch/x86/platform/olpc/olpc-xo1-sci.c b/arch/x86/platform/olpc/olpc-xo1-sci.c
>index 8fbf961..9de2a00 100644
>--- a/arch/x86/platform/olpc/olpc-xo1-sci.c
>+++ b/arch/x86/platform/olpc/olpc-xo1-sci.c
>@@ -104,6 +177,37 @@ static int __devinit setup_sci_interrupt(struct platform_device *pdev)
> 	return r;
> }
> 
>+static int __devinit setup_ec_sci(void)
>+{
>+	int r;
>+
>+	r = gpio_request(OLPC_GPIO_ECSCI, "OLPC-ECSCI");
>+	if (r)
>+		return r;
>+
>+	gpio_direction_input(OLPC_GPIO_ECSCI);
>+
>+	/* Clear pending EC SCI events */
>+	cs5535_gpio_set(OLPC_GPIO_ECSCI, GPIO_NEGATIVE_EDGE_STS);
>+	cs5535_gpio_set(OLPC_GPIO_ECSCI, GPIO_POSITIVE_EDGE_STS);

why not use the gpio framework here, i.e. gpio_set_value()?

>+
>+	/* Enable EC SCI events */
>+	cs5535_gpio_set(OLPC_GPIO_ECSCI, GPIO_EVENTS_ENABLE);
>+
>+	/* Set the SCI to cause a PME event on group 7 */
>+	cs5535_gpio_setup_event(OLPC_GPIO_ECSCI, 7, 1);
>+
>+	/* And have group 7 also fire the SCI interrupt */
>+	cs5535_gpio_set_irq(7, sci_irq);

What do you do here? Could this be hidden behind a gpio irq_chip or is
this too olpc specific?

Sebastian
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