[XS] Change in coreboot[main]: doc/internals/devicetree_language: eSPI doesn't support legacy DRQ

[Felix Held (Code Review)]

Felix Held has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/87204?usp=email )

Change subject: doc/internals/devicetree_language: eSPI doesn't support legacy DRQ
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doc/internals/devicetree_language: eSPI doesn't support legacy DRQ

In contracts to the ISA and LPC bus, eSPI doesn't support legacy
ISA-style DMA any more, so don't list eSPI as interface in the 'drq'
chapter.

The Intel document #841685 "Enhanced Serial Peripheral Interface (eSPI)
Interface Base Specification (for Client and Server Platforms)" revision
1.6 says this about the eSPI interface: "However, 8237 DMA and Firmware
Hub (FWH) are not supported over this interface."

Change-Id: I69d4b09688699dfc984a42671abfe3804d30ade9
Signed-off-by: Felix Held 
---
M Documentation/internals/devicetree_language.md
1 file changed, 1 insertion(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/04/87204/1

diff --git a/Documentation/internals/devicetree_language.md b/Documentation/internals/devicetree_language.md
index 0609559..d189844 100644
--- a/Documentation/internals/devicetree_language.md
+++ b/Documentation/internals/devicetree_language.md
@@ -444,7 +444,7 @@
 * Usage: `drq 0x<register #> = <drq line>`

Drq is used to configure a legacy DMA Request line register for a device
-on a legacy bus - ISA/LPC/eSPI.
+on a legacy bus - ISA/LPC.

The drq configuration is only allowed inside a pnp block.