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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2015-10-23 12:16:41 +0300
committerWolfram Sang <wsa@the-dreams.de>2015-10-26 15:25:53 +0100
commit98a3be44ffa67b812de7aa7aed9f2331edcfb1a5 (patch)
tree81abee7915f98c72abd4063ee7379c9af09b440a /Documentation/acpi/enumeration.txt
parent049e6dde7e57f0054fdc49102e7ef4830c698b46 (diff)
downloadlinux-98a3be44ffa67b812de7aa7aed9f2331edcfb1a5.tar.bz2
mfd: core: redo ACPI matching of the children devices
There is at least one board on the market, i.e. Intel Galileo Gen2, that uses _ADR to distinguish the devices under one actual device. Due to this we have to improve the quirk in the MFD core to handle that board. Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'Documentation/acpi/enumeration.txt')
-rw-r--r--Documentation/acpi/enumeration.txt11
1 files changed, 8 insertions, 3 deletions
diff --git a/Documentation/acpi/enumeration.txt b/Documentation/acpi/enumeration.txt
index b731b292e812..a91ec5af52df 100644
--- a/Documentation/acpi/enumeration.txt
+++ b/Documentation/acpi/enumeration.txt
@@ -347,13 +347,18 @@ For the first case, the MFD drivers do not need to do anything. The
resulting child platform device will have its ACPI_COMPANION() set to point
to the parent device.
-If the ACPI namespace has a device that we can match using an ACPI id,
-the id should be set like:
+If the ACPI namespace has a device that we can match using an ACPI id or ACPI
+adr, the cell should be set like:
+
+ static struct mfd_cell_acpi_match my_subdevice_cell_acpi_match = {
+ .pnpid = "XYZ0001",
+ .adr = 0,
+ };
static struct mfd_cell my_subdevice_cell = {
.name = "my_subdevice",
/* set the resources relative to the parent */
- .acpi_pnpid = "XYZ0001",
+ .acpi_match = &my_subdevice_cell_acpi_match,
};
The ACPI id "XYZ0001" is then used to lookup an ACPI device directly under