event: Correct dependencies on the EVENT framework

The event framework is just that, a framework. Enabling it by itself
does nothing, so we shouldn't ask the user about it. Reword (and correct
typos) around this the option and help text. This also applies to
DM_EVENT and EVENT_DYNAMIC. Only EVENT_DEBUG and CMD_EVENT should be
visible to the user to select, when EVENT is selected.

With this, it's time to address the larger problems. When functionality
uses events, typically via EVENT_SPY, the appropriate framework then
must be select'd and NOT imply'd. As the functionality will cease to
work (and so, platforms will fail to boot) this is non-optional and
where select is appropriate. Audit the current users of EVENT_SPY to
have a more fine-grained approach to select'ing the framework where
used. Also ensure the current users of event_register and also select
EVENT_DYNAMIC.

Cc: AKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reported-by: Oliver Graute <Oliver.Graute@kococonnector.com>
Reported-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Fixes: 7fe32b3442f0 ("event: Convert arch_cpu_init_dm() to use events")
Fixes: 42fdcebf859f ("event: Convert misc_init_f() to use events")
Fixes: c5ef2025579e ("dm: fix DM_EVENT dependencies")
Signed-off-by: Tom Rini <trini@konsulko.com>
Tested-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Fabio Estevam <festevam@denx.de>

1 files changed, 8 insertions, 9 deletions

diff --git a/common/Kconfig b/common/Kconfig
index 439b2198f6..1c9f4774ba 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -604,24 +604,23 @@ config CYCLIC_MAX_CPU_TIME_US
 endif # CYCLIC
 
 config EVENT
-	bool "General-purpose event-handling mechanism"
-	default y if SANDBOX
+	bool
 	help
-	  This enables sending and processing of events, to allow interested
-	  parties to be alerted when something happens. This is an attempt to
-	  stem the flow of weak functions, hooks, functions in board_f.c
-	  and board_r.c and the Kconfig options below.
+	  This adds a framework for general purpose sending and processing of
+	  events, to allow interested parties to be alerted when something
+	  happens. This is an attempt to stem the flow of weak functions,
+	  hooks, functions in board_f.c and board_r.c and the Kconfig options
+	  below.
 
 	  See doc/develop/event.rst for more information.
 
 if EVENT
 
 config EVENT_DYNAMIC
-	bool "Support event registration at runtime"
-	default y if SANDBOX
+	bool
 	help
 	  Enable this to support adding an event spy at runtime, without adding
-	  it to the EVENT_SPy() linker list. This increases code size slightly
+	  it to the EVENT_SPY() linker list. This increases code size slightly
 	  but provides more flexibility for boards and subsystems that need it.
 
 config EVENT_DEBUG