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pm: device_runtime: add zephyr,pm-device-runtime-auto

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Add the `zephyr,pm-device-runtime-auto` flag to `pm.yaml` and
`struct pm_device`.

This flag is intended to signify to the boot system that device runtime
PM should be automatically enabled on the device after the init function
has run.

Only run `pm_device_runtime_auto_enable` function on a device if
initialisation succeeded. This prevents actions being run on devices
that are not ready.

Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
This commit is contained in:
Jordan Yates 2022-03-12 21:10:42 +10:00 • committed by Anas Nashif
commit db3d51bb7d
5 changed files with 54 additions and 8 deletions
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5
kernel/init.c
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@ -34,6 +34,7 @@
#include <kswap.h>
#include <zephyr/timing/timing.h>
#include <zephyr/logging/log.h>
#include <zephyr/pm/device_runtime.h>
LOG_MODULE_REGISTER(os, CONFIG_KERNEL_LOG_LEVEL);
/* the only struct z_kernel instance */
@ -261,6 +262,10 @@ static void z_sys_init_run_level(enum init_level level)
dev->state->init_res = rc;
}
dev->state->initialized = true;
if (rc == 0) {
/* Run automatic device runtime enablement */
(void)pm_device_runtime_auto_enable(dev);
}
}
}
}