Merge branch '2022-03-09-events-subsystem' into nextnext

To quote the author:
It is a common need in U-Boot to have one subsystem notify another
when something happens. An example is reading a partition table when a
new block device is set up.

It is also common to add weak functions and 'hook' functions to modify
how U-Boot works. See for example ft_board_setup() and the like.

U-Boot would benefit from a generic mechanism to handle these cases,
with the ability to hook into various 'events' in a
subsystem-independent and transparent way.

This series provides a way to create and dispatch events, with a way of
registering a 'spy' which watches for events of different types. This
allows 'hook' functions to be created in a generic way.

It also includes a script to list the hooks in an image, which is a bit
easier to debug than weak functions, as well as an 'event' command to
do the same from within U-Boot.

These 'static' events can be used to replace hooks like misc_init_f(),
for example. Also included is basic support for 'dynamic' events, where
a spy can be registered at runtime. The need for this is still being
figured out.

1 files changed, 2 insertions, 16 deletions

diff --git a/net/arp.c b/net/arp.c
index 0b086dc..37848ad 100644
--- a/net/arp.c
+++ b/net/arp.c
@@ -17,20 +17,6 @@
 
 #include "arp.h"
 
-#ifndef	CONFIG_ARP_TIMEOUT
-/* Milliseconds before trying ARP again */
-# define ARP_TIMEOUT		5000UL
-#else
-# define ARP_TIMEOUT		CONFIG_ARP_TIMEOUT
-#endif
-
-
-#ifndef	CONFIG_NET_RETRY_COUNT
-# define ARP_TIMEOUT_COUNT	5	/* # of timeouts before giving up  */
-#else
-# define ARP_TIMEOUT_COUNT	CONFIG_NET_RETRY_COUNT
-#endif
-
 struct in_addr net_arp_wait_packet_ip;
 static struct in_addr net_arp_wait_reply_ip;
 /* MAC address of waiting packet's destination */
@@ -109,10 +95,10 @@ int arp_timeout_check(void)
 	t = get_timer(0);
 
 	/* check for arp timeout */
-	if ((t - arp_wait_timer_start) > ARP_TIMEOUT) {
+	if ((t - arp_wait_timer_start) > CONFIG_ARP_TIMEOUT) {
 		arp_wait_try++;
 
-		if (arp_wait_try >= ARP_TIMEOUT_COUNT) {
+		if (arp_wait_try >= CONFIG_NET_RETRY_COUNT) {
 			puts("\nARP Retry count exceeded; starting again\n");
 			arp_wait_try = 0;
 			net_set_state(NETLOOP_FAIL);