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esp32: initialize PM at startup, add Kconfig options

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This commit is contained in:
Ivan Grokhotkov 2017-09-22 23:02:58 +08:00
parent 68e1751b78
commit 42d51a4224
2 changed files with 66 additions and 0 deletions
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52
components/esp32/Kconfig
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@ -945,3 +945,55 @@ config ESP32_PHY_MAX_TX_POWER
default ESP32_PHY_MAX_WIFI_TX_POWER
endmenu # PHY
menu "Power Management"
config PM_ENABLE
bool "Support for power management"
default n
help
If enabled, application is compiled with support for power management.
This option has run-time overhead (increased interrupt latency,
longer time to enter idle state), and it also reduces accuracy of
RTOS ticks and timers used for timekeeping.
Enable this option if application uses power management APIs.
config PM_DFS_INIT_AUTO
bool "Enable dynamic frequency scaling (DFS) at startup"
depends on PM_ENABLE
default n
help
If enabled, startup code configures dynamic frequency scaling.
Max CPU frequency is set to CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ setting,
min frequency is set to XTAL frequency.
If disabled, DFS will not be active until the application
configures it using esp_pm_configure function.
config PM_PROFILING
bool "Enable profiling counters for PM locks"
depends on PM_ENABLE
default n
help
If enabled, esp_pm_* functions will keep track of the amount of time
each of the power management locks has been held, and esp_pm_dump_locks
function will print this information.
This feature can be used to analyze which locks are preventing the chip
from going into a lower power state, and see what time the chip spends
in each power saving mode. This feature does incur some run-time
overhead, so should typically be disabled in production builds.
config PM_TRACE
bool "Enable debug tracing of PM using GPIOs"
depends on PM_ENABLE
default n
help
If enabled, some GPIOs will be used to signal events such as RTOS ticks,
frequency switching, entry/exit from idle state. Refer to pm_trace.c
file for the list of GPIOs.
This feature is intended to be used when analyzing/debugging behavior
of power management implementation, and should be kept disabled in
applications.
endmenu # "Power Management"

14
components/esp32/cpu_start.c
View file

@ -66,6 +66,8 @@
#include "esp_spiram.h"
#include "esp_clk_internal.h"
#include "esp_timer.h"
#include "esp_pm.h"
#include "pm_impl.h"
#include "trax.h"
#define STRINGIFY(s) STRINGIFY2(s)
@ -337,6 +339,18 @@ void start_cpu0_default(void)
spi_flash_init();
/* init default OS-aware flash access critical section */
spi_flash_guard_set(&g_flash_guard_default_ops);
#ifdef CONFIG_PM_ENABLE
esp_pm_impl_init();
#ifdef CONFIG_PM_DFS_INIT_AUTO
rtc_cpu_freq_t max_freq;
rtc_clk_cpu_freq_from_mhz(CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ, &max_freq);
esp_pm_config_esp32_t cfg = {
.max_cpu_freq = max_freq,
.min_cpu_freq = RTC_CPU_FREQ_XTAL
};
esp_pm_configure(&cfg);
#endif //CONFIG_PM_DFS_INIT_AUTO
#endif //CONFIG_PM_ENABLE
#if CONFIG_ESP32_ENABLE_COREDUMP
esp_core_dump_init();