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Commit d2c8bf51 authored by Alexander Aring's avatar Alexander Aring Committed by Marcel Holtmann
Browse files

at86rf230: add slp_tr support to start tx 



This patch adds support for one of the slp_tr gpio use cases which
indicates the TX_START command without doing some spi bus traffic.

Signed-off-by: default avatarAlexander Aring <alex.aring@gmail.com>
Reviewed-by: default avatarVarka Bhadram <varkabhadram@gmail.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 85009203

drivers/net/ieee802154/at86rf230.c

+21 −6
Original line number Diff line number Diff line
@@ -85,6 +85,7 @@ struct at86rf230_local { 
	struct ieee802154_hw *hw;

	struct at86rf2xx_chip_data *data;

	struct regmap *regmap;

	int slp_tr;



	struct completion state_complete;

	struct at86rf230_state_change state;
@@ -339,6 +340,14 @@ at86rf230_write_subreg(struct at86rf230_local *lp, 
	return regmap_update_bits(lp->regmap, addr, mask, data << shift);

}



static inline void

at86rf230_slp_tr_rising_edge(struct at86rf230_local *lp)

{

	gpio_set_value(lp->slp_tr, 1);

	udelay(1);

	gpio_set_value(lp->slp_tr, 0);

}



static bool

at86rf230_reg_writeable(struct device *dev, unsigned int reg)

{
@@ -940,14 +949,19 @@ at86rf230_write_frame_complete(void *context) 
	u8 *buf = ctx->buf;

	int rc;



	ctx->trx.len = 2;



	if (gpio_is_valid(lp->slp_tr)) {

		at86rf230_slp_tr_rising_edge(lp);

	} else {

		buf[0] = (RG_TRX_STATE & CMD_REG_MASK) | CMD_REG | CMD_WRITE;

		buf[1] = STATE_BUSY_TX;

	ctx->trx.len = 2;

		ctx->msg.complete = NULL;

		rc = spi_async(lp->spi, &ctx->msg);

		if (rc)

			at86rf230_async_error(lp, ctx, rc);

	}

}



static void

at86rf230_write_frame(void *context)
@@ -1680,6 +1694,7 @@ static int at86rf230_probe(struct spi_device *spi) 
	lp = hw->priv;

	lp->hw = hw;

	lp->spi = spi;

	lp->slp_tr = slp_tr;

	hw->parent = &spi->dev;

	hw->vif_data_size = sizeof(*lp);

	ieee802154_random_extended_addr(&hw->phy->perm_extended_addr);