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logging: allow disabling auto-start of UART backend

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This allows putting the UART backend on a serial device that has to be
quiet unless logging is explicitly enabled at runtime.

Signed-off-by: Armin Brauns <armin.brauns@embedded-solutions.at>
This commit is contained in:
Armin Brauns 2022-11-30 16:00:01 +01:00 • committed by Carles Cufí
commit 7e0e9d0d7e
2 changed files with 11 additions and 1 deletions
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8
subsys/logging/backends/Kconfig.uart
View file

@ -24,6 +24,14 @@ config LOG_BACKEND_UART_BUFFER_SIZE
Sets the number of bytes which can be buffered in RAM before log_output_flush
is automatically called on the backend.
config LOG_BACKEND_UART_AUTOSTART
bool "Automatically start UART backend"
default y
help
When enabled automatically start the UART logging backend on
application start. When disabled, the application needs to start
the backend manually using log_backend_enable().
backend = UART
backend-str = uart
source "subsys/logging/Kconfig.template.log_format_config"

4
subsys/logging/backends/log_backend_uart.c
View file

@ -12,6 +12,7 @@
#include <zephyr/logging/log.h>
#include <zephyr/device.h>
#include <zephyr/drivers/uart.h>
#include <zephyr/sys/util_macro.h>
#include <zephyr/sys/__assert.h>
LOG_MODULE_REGISTER(log_uart);
@ -161,4 +162,5 @@ const struct log_backend_api log_backend_uart_api = {
.format_set = format_set,
};
LOG_BACKEND_DEFINE(log_backend_uart, log_backend_uart_api, true);
LOG_BACKEND_DEFINE(log_backend_uart, log_backend_uart_api,
IS_ENABLED(CONFIG_LOG_BACKEND_UART_AUTOSTART));