From: Arend van Spriel <arend@broadcom.com>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: ACPI Devel Maling List <linux-acpi@vger.kernel.org>
Subject: ACPI_COMPANION equivalent in older kernels
Date: Wed, 10 Jun 2015 16:17:44 +0200 [thread overview]
Message-ID: <55784708.60305@broadcom.com> (raw)
For backporting a driver to 3.11 kernel I would like to know how to get
same functionality as ACPI_COMPANION(). I did it like below, but would
like to have some confirmation on it.
Regards,
Arend
--8<------------------------------------------------------------------
static inline
struct acpi_device *_acpi_get_companion(struct device *dev)
{
struct acpi_device *adev;
int ret;
ret = acpi_bus_get_device(ACPI_HANDLE(dev), &adev);
if (ret < 0)
adev = NULL;
return adev;
}
#define ACPI_COMPANION(dev) _acpi_get_companion(dev)
next reply other threads:[~2015-06-10 14:19 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-10 14:17 Arend van Spriel [this message]
2015-06-11 0:02 ` ACPI_COMPANION equivalent in older kernels Rafael J. Wysocki
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