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Commit 74ed9d98 authored by Alexander Aring's avatar Alexander Aring Committed by Marcel Holtmann
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at86rf230: add recommended csma backoffs settings 



This patch adds support for a new random csma backoffs settings when
going into sleep state. This is recommended according at86rf2xx
datasheets.

Signed-off-by: default avatarAlexander Aring <alex.aring@gmail.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent cbe62346

drivers/net/ieee802154/at86rf230.c

+11 −0
Original line number Diff line number Diff line
@@ -945,10 +945,21 @@ static void 
at86rf230_stop(struct ieee802154_hw *hw)

{

	struct at86rf230_local *lp = hw->priv;

	u8 csma_seed[2];



	at86rf230_sync_state_change(hw->priv, STATE_FORCE_TRX_OFF);



	disable_irq(lp->spi->irq);



	/* It's recommended to set random new csma_seeds before sleep state.

	 * Makes only sense in the stop callback, not doing this inside of

	 * at86rf230_sleep, this is also used when we don't transmit afterwards

	 * when calling start callback again.

	 */

	get_random_bytes(csma_seed, ARRAY_SIZE(csma_seed));

	at86rf230_write_subreg(lp, SR_CSMA_SEED_0, csma_seed[0]);

	at86rf230_write_subreg(lp, SR_CSMA_SEED_1, csma_seed[1]);



	at86rf230_sleep(lp);

}