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log: Add a way to enable/disable a log device

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At present all log devices are enabled by default. Add a function to allow
devices to be disabled or enabled at runtime.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2020-09-12 12:28:49 -06:00 • committed by Tom Rini
parent bd180db2cc
commit 3d03ab6361
4 changed files with 70 additions and 0 deletions
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17
include/log.h
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@ -388,6 +388,10 @@ struct log_filter {
#define LOG_DRIVER(_name) \
ll_entry_declare(struct log_driver, _name, log_driver)
/* Get a pointer to a given driver */
#define LOG_GET_DRIVER(__name) \
ll_entry_get(struct log_driver, __name, log_driver)
/**
* log_get_cat_name() - Get the name of a category
*
@ -465,6 +469,19 @@ int log_add_filter(const char *drv_name, enum log_category_t cat_list[],
*/
int log_remove_filter(const char *drv_name, int filter_num);
/**
* log_device_set_enable() - Enable or disable a log device
*
* Devices are referenced by their driver, so use LOG_GET_DRIVER(name) to pass
* the driver to this function. For example if the driver is declared with
* LOG_DRIVER(wibble) then pass LOG_GET_DRIVER(wibble) here.
*
* @drv: Driver of device to enable
* @enable: true to enable, false to disable
* @return 0 if OK, -ENOENT if the driver was not found
*/
int log_device_set_enable(struct log_driver *drv, bool enable);
#if CONFIG_IS_ENABLED(LOG)
/**
* log_init() - Set up the log system ready for use