diff options
| author | Duncan Laurie <dlaurie@chromium.org> | 2013-05-06 14:02:27 -0700 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2013-11-25 23:14:17 +0100 |
| commit | 92e1f15175b3ab6fc50e3614c735d5e9cb3f3a22 (patch) | |
| tree | 6ca3345d454317c1b167c9d79bbb4e36d6c2f54d /src/southbridge/intel/lynxpoint/acpi/serialio.asl | |
| parent | f8b36501fd3f70569b15cc8dcaa9bcd8f76870af (diff) | |
lynxpoint: Expose ACPI Device for LP GPIO controller
In order to probe the gpio-lynxpoint kernel driver the
LP GPIO controller needs to be exposed as a specific
ACPI device.
This also allows the resources to be exposed to the OS via
this device instead of the catch-all LPC device.
Ensure the driver loads at boot:
gpiochip_find_base: found new base at 162
gpiochip_add: registered GPIOs 162 to 255 on device: INT33C7:00
Also ensure the driver is visible in sysfs:
$ cat /sys/devices/platform/INT33C7:00/gpio/gpiochip162/label
INT33C7:00
Change-Id: I9f79c008f88da9b67ed1cdfdb9d3a581ce8f05ff
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/50215
Reviewed-on: http://review.coreboot.org/4158
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/southbridge/intel/lynxpoint/acpi/serialio.asl')
| -rw-r--r-- | src/southbridge/intel/lynxpoint/acpi/serialio.asl | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/southbridge/intel/lynxpoint/acpi/serialio.asl b/src/southbridge/intel/lynxpoint/acpi/serialio.asl index 6ea23c69ea..03f6974a38 100644 --- a/src/southbridge/intel/lynxpoint/acpi/serialio.asl +++ b/src/southbridge/intel/lynxpoint/acpi/serialio.asl @@ -468,3 +468,53 @@ Device (SDIO) } } } + +Device (GPIO) +{ + // GPIO Controller + Name (_HID, "INT33C7") + Name (_CID, "INT33C7") + Name (_UID, 1) + + Name (RBUF, ResourceTemplate() + { + DWordIo (ResourceProducer, + MinFixed, // IsMinFixed + MaxFixed, // IsMaxFixed + PosDecode, // Decode + EntireRange, // ISARanges + 0x00000000, // AddressGranularity + 0x00000000, // AddressMinimum + 0x00000000, // AddressMaximum + 0x00000000, // AddressTranslation + 0x00000000, // RangeLength + , // ResourceSourceIndex + , // ResourceSource + BAR0) + }) + + Method (_CRS, 0, NotSerialized) + { + If (\ISLP ()) { + CreateDwordField (^RBUF, ^BAR0._MIN, BMIN) + CreateDwordField (^RBUF, ^BAR0._MAX, BMAX) + CreateDwordField (^RBUF, ^BAR0._LEN, BLEN) + + Store (DEFAULT_GPIOSIZE, BLEN) + Store (DEFAULT_GPIOBASE, BMIN) + Store (Subtract (Add (DEFAULT_GPIOBASE, + DEFAULT_GPIOSIZE), 1), BMAX) + } + + Return (RBUF) + } + + Method (_STA, 0, NotSerialized) + { + If (\ISLP ()) { + Return (0xF) + } Else { + Return (0x0) + } + } +} |