diff options
| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2014-09-16 14:52:36 +0300 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2014-09-26 08:24:05 +0100 |
| commit | 6ab3430129e258ea31dd214adf1c760dfafde67a (patch) | |
| tree | ff8b82f6039f2d7b2761da82ab5ca5ac37f27114 /include/linux/mfd | |
| parent | 7be180cc7a0c5768a984126d9468afc82dcf93a2 (diff) | |
mfd: Add ACPI support
If an MFD device is backed by ACPI namespace, we should allow subdevice
drivers to access their corresponding ACPI companion devices through normal
means (e.g using ACPI_COMPANION()).
This patch adds such support to the MFD core. If the MFD parent device
does not specify any ACPI _HID/_CID for the child device, the child
device will share the parent ACPI companion device. Otherwise the child
device will be assigned with the corresponding ACPI companion, if found
in the namespace below the parent.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'include/linux/mfd')
| -rw-r--r-- | include/linux/mfd/core.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/mfd/core.h b/include/linux/mfd/core.h index f543de91ce1..73e1709d4c0 100644 --- a/include/linux/mfd/core.h +++ b/include/linux/mfd/core.h @@ -44,6 +44,9 @@ struct mfd_cell { */ const char *of_compatible; + /* Matches ACPI PNP id, either _HID or _CID */ + const char *acpi_pnpid; + /* * These resources can be specified relative to the parent device. * For accessing hardware you should use resources from the platform dev |