[U-Boot] [PATCH v2 3/4] x86: acpi: Enable ACPI companion for Intel iDMA 32-bit

Andy Shevchenko
2019-07-14T16:23:58Z

ACPI has a capability to specify DMA parameters for DMA channel consumers.
To enable this for Intel Edison, describe GP DMA device in ACPI table
in order to get an ACPI handle to it in OS.

This works in conjunction with CSRT, which must be in align with DSDT.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
.../asm/arch-tangier/acpi/southcluster.asl | 22 +++++++++++++++++++
1 file changed, 22 insertions(+)

diff --git a/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl b/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl
index 241d4ac801..0ec195b51b 100644
--- a/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl
+++ b/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl
@@ -431,6 +431,28 @@ Device (PCI0)
}
}
}
+
+ Device (GDMA)
+ {
+ Name (_ADR, 0x00150000)
+ Name (_HID, "808611A2")
+ Name (_UID, Zero)
+
+ Method (_STA, 0, NotSerialized)
+ {
+ Return (STA_VISIBLE)
+ }
+
+ Method (_CRS, 0, Serialized)
+ {
+ Name (RBUF, ResourceTemplate ()
+ {
+ Memory32Fixed(ReadWrite, 0xFF192000, 0x00001000)
+ Interrupt(ResourceConsumer, Level, ActiveHigh, Shared, ,, ) { 32 }
+ })
+ Return (RBUF)
+ }
+ }
}

Device (FLIS)
--
2.20.1