Messages in this thread | | | Date | Mon, 21 Nov 2011 08:47:51 +0100 | Subject | Re: [RFC][PATCH] gpiolib: add irq_wake (power-management) sysfs file | From | Linus Walleij <> |
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On Fri, Nov 11, 2011 at 10:40 AM, Patrick Combes <p-combes@ti.com> wrote:
> This patch creates a new sysfs file /sys/class/gpio/gpioN/irq_wake to enable > usermode application to set the wake properties of a gpio IRQ. > This option can be set or not for each gpio to preserve power consumption (e.g > embedded systems). (...) > + if (!test_bit(FLAG_EXPORT, &desc->flags)) > + status = -EIO; > + else if (sysfs_streq(buf, "enable") || sysfs_streq(buf, "1")) > + status = enable_irq_wake(gpio_to_irq(gpio)); > + else if (sysfs_streq(buf, "disable") || sysfs_streq(buf, "0")) > + status = disable_irq_wake(gpio_to_irq(gpio)); > + else > + status = -EINVAL;
As noted elsewhere, human-readable files go into debugfs.
sysfs rule is one file, one value.
Create a file ile named "irq_wakeup_enable" that works like this:
cat wakeup_enable 0 echo 1 > wakeup_enable cat wakeup_enable 1
Also document you new ABI in Documentation/ABI/testing/* and preferabley write some new words on it in Documentation/gpio.txt too.
Thanks! Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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