[beken-72xx] Allow setting deep sleep wake-up pins as floating #275
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According to guide `gpio_stay_*_map` are specifically there to prevent pulling pins to a specific level and let them float during deep sleep. https://docs.bekencorp.com/sdk_3.0.x/bk7238/build/en/latest/developer-guide/power_save/sleep_test.html This allows any external low-power circuitry to change a pin level, as required, to trigger the wake up This requires changes in BDK and was implemented via fixup. Also, exposed `gpio_stay_lo_map` parameter via `lt_deep_sleep_keep_floating_gpio` to manage this configuration for pins in range P0-P31.
kuba2k2
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Sep 5, 2024
kuba2k2
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According to guide
gpio_stay_*_mapare specifically there to prevent pulling pins to a specific level and let them float during deep sleep.https://docs.bekencorp.com/sdk_3.0.x/bk7238/build/en/latest/developer-guide/power_save/sleep_test.html
This allows any external low-power circuitry to change a pin level, as required, to trigger the wake up.
This requires changes in BDK and was implemented via fixup. Also, exposed
gpio_stay_lo_mapparameter vialt_deep_sleep_keep_floating_gpioto manage this configuration for pins in range P0-P31.