From 92e1f15175b3ab6fc50e3614c735d5e9cb3f3a22 Mon Sep 17 00:00:00 2001 From: Duncan Laurie Date: Mon, 6 May 2013 14:02:27 -0700 Subject: 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 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 --- src/southbridge/intel/lynxpoint/acpi/lpc.asl | 58 ++++------------------- src/southbridge/intel/lynxpoint/acpi/serialio.asl | 50 +++++++++++++++++++ 2 files changed, 60 insertions(+), 48 deletions(-) diff --git a/src/southbridge/intel/lynxpoint/acpi/lpc.asl b/src/southbridge/intel/lynxpoint/acpi/lpc.asl index f9bf57830f..7e2692637a 100644 --- a/src/southbridge/intel/lynxpoint/acpi/lpc.asl +++ b/src/southbridge/intel/lynxpoint/acpi/lpc.asl @@ -199,60 +199,22 @@ Device (LPCB) 0x1, 0xff) // GPIO region may be 128 bytes or 4096 bytes - IO (Decode16, DEFAULT_GPIOBASE, DEFAULT_GPIOBASE, - 0x1, 0x00, GPR1) - IO (Decode16, 0x0000, 0x0000, 0x1, 0x00, GPR2) - IO (Decode16, 0x0000, 0x0000, 0x1, 0x00, GPR3) - IO (Decode16, 0x0000, 0x0000, 0x1, 0x00, GPR4) + IO (Decode16, 0x0000, 0x0000, 0x1, 0x00, GPR1) }) Method (_CRS, 0, NotSerialized) { - CreateByteField (^RBUF, ^GPR1._LEN, R1LN) - CreateByteField (^RBUF, ^GPR2._LEN, R2LN) - CreateByteField (^RBUF, ^GPR3._LEN, R3LN) - CreateByteField (^RBUF, ^GPR4._LEN, R4LN) + // LynxPoint-LP GPIO resources are defined in the + // SerialIO GPIO device and LynxPoint-H GPIO resources + // are defined here. + If (LNot (\ISLP ())) { + CreateByteField (^RBUF, ^GPR1._LEN, R1LN) + CreateWordField (^RBUF, ^GPR1._MIN, R1MN) + CreateWordField (^RBUF, ^GPR1._MAX, R1MX) - CreateWordField (^RBUF, ^GPR1._MIN, R1MN) - CreateWordField (^RBUF, ^GPR2._MIN, R2MN) - CreateWordField (^RBUF, ^GPR3._MIN, R3MN) - CreateWordField (^RBUF, ^GPR4._MIN, R4MN) - - CreateWordField (^RBUF, ^GPR1._MAX, R1MX) - CreateWordField (^RBUF, ^GPR2._MAX, R2MX) - CreateWordField (^RBUF, ^GPR3._MAX, R3MX) - CreateWordField (^RBUF, ^GPR4._MAX, R4MX) - - // Update GPIO region for LynxPoint-LP - If (\ISLP ()) { - // LynxPoint-LP - Store (R1MN, Local0) - - // Update GPIO bank 1 - Store (Local0, R1MN) - Store (Local0, R1MX) - Store (0xff, R1LN) - - // Update GPIO bank 2 - Add (Local0, 0x100, Local0) - Store (Local0, R2MN) - Store (Local0, R2MX) - Store (0xff, R2LN) - - // Update GPIO bank 3 - Add (Local0, 0x100, Local0) - Store (Local0, R3MN) - Store (Local0, R3MN) - Store (0xff, R3LN) - - // Update GPIO bank 4 - Add (Local0, 0x100, Local0) - Store (Local0, R4MN) - Store (Local0, R4MN) - Store (0xff, R4LN) - } Else { - // LynxPoint-H // Update GPIO region length + Store (DEFAULT_GPIOBASE, R1MN) + Store (DEFAULT_GPIOBASE, R1MX) Store (DEFAULT_GPIOSIZE, R1LN) } Return (RBUF) 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) + } + } +} -- cgit v1.2.3