[src/trunk]: src/sys/dev/eisa Correct the comment about the INTHIGH bit in th...

[thorpej <thorpej%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/1e46be7cf011
branches:  trunk
changeset: 984806:1e46be7cf011
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Sat Jul 24 15:44:16 2021 +0000

description:
Correct the comment about the INTHIGH bit in the INTDEF register.  It
does indeed mean "IRQ signal is active-high", but "else edge" is not
correct; level-triggered EISA interrupt are active-low, and edge-triggered
EISA interrupts are rising-edge, so INTHIGH would in fact mean "edge".

diffstat:

 sys/dev/eisa/ahbreg.h |  4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diffs (18 lines):

diff -r 72f48b68e562 -r 1e46be7cf011 sys/dev/eisa/ahbreg.h
--- a/sys/dev/eisa/ahbreg.h     Sat Jul 24 14:00:08 2021 +0000
+++ b/sys/dev/eisa/ahbreg.h     Sat Jul 24 15:44:16 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ahbreg.h,v 1.16 2008/04/28 20:23:48 martin Exp $       */
+/*     $NetBSD: ahbreg.h,v 1.17 2021/07/24 15:44:16 thorpej Exp $      */
 
 /*-
  * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
@@ -70,7 +70,7 @@
 #define        INT12   0x03
 #define        INT14   0x05
 #define        INT15   0x06
-#define INTHIGH 0x08           /* int high=ACTIVE (else edge) */
+#define INTHIGH 0x08           /* interrupt signal is active-high */
 #define        INTEN   0x10
 /**** bit definitions for SCSIDEF ****/
 #define        HSCSIID 0x0F            /* our SCSI ID */