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>
This commit is contained in:
Duncan Laurie
Stefan Reinauer
parent
f8b36501fd
commit
92e1f15175
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@ -199,60 +199,22 @@ Device (LPCB)
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0x1, 0xff)
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0x1, 0xff)
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// GPIO region may be 128 bytes or 4096 bytes
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// GPIO region may be 128 bytes or 4096 bytes
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IO (Decode16, DEFAULT_GPIOBASE, DEFAULT_GPIOBASE,
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IO (Decode16, 0x0000, 0x0000, 0x1, 0x00, GPR1)
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0x1, 0x00, GPR1)
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IO (Decode16, 0x0000, 0x0000, 0x1, 0x00, GPR2)
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IO (Decode16, 0x0000, 0x0000, 0x1, 0x00, GPR3)
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IO (Decode16, 0x0000, 0x0000, 0x1, 0x00, GPR4)
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})
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})
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Method (_CRS, 0, NotSerialized)
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Method (_CRS, 0, NotSerialized)
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{
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{
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CreateByteField (^RBUF, ^GPR1._LEN, R1LN)
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// LynxPoint-LP GPIO resources are defined in the
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CreateByteField (^RBUF, ^GPR2._LEN, R2LN)
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// SerialIO GPIO device and LynxPoint-H GPIO resources
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CreateByteField (^RBUF, ^GPR3._LEN, R3LN)
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// are defined here.
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CreateByteField (^RBUF, ^GPR4._LEN, R4LN)
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If (LNot (\ISLP ())) {
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CreateByteField (^RBUF, ^GPR1._LEN, R1LN)
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CreateWordField (^RBUF, ^GPR1._MIN, R1MN)
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CreateWordField (^RBUF, ^GPR1._MAX, R1MX)
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CreateWordField (^RBUF, ^GPR1._MIN, R1MN)
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CreateWordField (^RBUF, ^GPR2._MIN, R2MN)
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CreateWordField (^RBUF, ^GPR3._MIN, R3MN)
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CreateWordField (^RBUF, ^GPR4._MIN, R4MN)
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CreateWordField (^RBUF, ^GPR1._MAX, R1MX)
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CreateWordField (^RBUF, ^GPR2._MAX, R2MX)
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CreateWordField (^RBUF, ^GPR3._MAX, R3MX)
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CreateWordField (^RBUF, ^GPR4._MAX, R4MX)
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// Update GPIO region for LynxPoint-LP
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If (\ISLP ()) {
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// LynxPoint-LP
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Store (R1MN, Local0)
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// Update GPIO bank 1
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Store (Local0, R1MN)
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Store (Local0, R1MX)
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Store (0xff, R1LN)
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// Update GPIO bank 2
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Add (Local0, 0x100, Local0)
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Store (Local0, R2MN)
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Store (Local0, R2MX)
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Store (0xff, R2LN)
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// Update GPIO bank 3
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Add (Local0, 0x100, Local0)
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Store (Local0, R3MN)
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Store (Local0, R3MN)
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Store (0xff, R3LN)
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// Update GPIO bank 4
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Add (Local0, 0x100, Local0)
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Store (Local0, R4MN)
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Store (Local0, R4MN)
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Store (0xff, R4LN)
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} Else {
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// LynxPoint-H
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// Update GPIO region length
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// Update GPIO region length
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Store (DEFAULT_GPIOBASE, R1MN)
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Store (DEFAULT_GPIOBASE, R1MX)
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Store (DEFAULT_GPIOSIZE, R1LN)
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Store (DEFAULT_GPIOSIZE, R1LN)
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}
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}
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Return (RBUF)
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Return (RBUF)
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@ -468,3 +468,53 @@ Device (SDIO)
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}
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}
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}
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}
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}
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}
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Device (GPIO)
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{
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// GPIO Controller
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Name (_HID, "INT33C7")
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Name (_CID, "INT33C7")
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Name (_UID, 1)
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Name (RBUF, ResourceTemplate()
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{
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DWordIo (ResourceProducer,
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MinFixed, // IsMinFixed
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MaxFixed, // IsMaxFixed
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PosDecode, // Decode
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EntireRange, // ISARanges
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0x00000000, // AddressGranularity
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0x00000000, // AddressMinimum
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0x00000000, // AddressMaximum
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0x00000000, // AddressTranslation
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0x00000000, // RangeLength
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, // ResourceSourceIndex
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, // ResourceSource
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BAR0)
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})
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Method (_CRS, 0, NotSerialized)
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{
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If (\ISLP ()) {
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CreateDwordField (^RBUF, ^BAR0._MIN, BMIN)
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CreateDwordField (^RBUF, ^BAR0._MAX, BMAX)
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CreateDwordField (^RBUF, ^BAR0._LEN, BLEN)
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Store (DEFAULT_GPIOSIZE, BLEN)
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Store (DEFAULT_GPIOBASE, BMIN)
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Store (Subtract (Add (DEFAULT_GPIOBASE,
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DEFAULT_GPIOSIZE), 1), BMAX)
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}
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Return (RBUF)
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}
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Method (_STA, 0, NotSerialized)
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{
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If (\ISLP ()) {
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Return (0xF)
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} Else {
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Return (0x0)
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}
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}
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}
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