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net: openthread: radio: Added sleep to tx as hw radio cap.

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OT_RADIO_CAPS_SLEEP_TO_TX was added as a radio capability
for ieee802154 radio. Waiting on RX state before transmission
is alternative condition to OT_RADIO_CAPS_SLEEP_TO_TX support
as it was a result of OpenThread architecture and is actually
not needed in the Zephyr. Such change lets to start transmission
faster and lower SED device power consumption in active state
about 30%.

Signed-off-by: Kamil Kasperczyk <kamil.kasperczyk@nordicsemi.no>
This commit is contained in:
Kamil Kasperczyk 2020-08-06 10:23:02 +02:00 • committed by Anas Nashif
commit be372872ea
4 changed files with 21 additions and 5 deletions
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3
drivers/ieee802154/ieee802154_nrf5.c
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@ -159,7 +159,8 @@ static enum ieee802154_hw_caps nrf5_get_capabilities(struct device *dev)
{
return IEEE802154_HW_FCS | IEEE802154_HW_FILTER |
IEEE802154_HW_CSMA | IEEE802154_HW_2_4_GHZ |
IEEE802154_HW_TX_RX_ACK | IEEE802154_HW_ENERGY_SCAN;
IEEE802154_HW_TX_RX_ACK | IEEE802154_HW_ENERGY_SCAN |
IEEE802154_HW_SLEEP_TO_TX;
}
static int nrf5_cca(struct device *dev)