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at86rf230: add slp_tr support to start tx

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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: Alexander Aring <alex.aring@gmail.com>
Reviewed-by: Varka Bhadram <varkabhadram@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Alexander Aring 2015-04-30 17:45:03 +02:00 committed by Marcel Holtmann
parent 8500920317
commit d2c8bf51d0
1 changed files with 21 additions and 6 deletions
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27
drivers/net/ieee802154/at86rf230.c
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@ -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)
{
@ -940,13 +949,18 @@ at86rf230_write_frame_complete(void *context)
u8 *buf = ctx->buf;
int rc;
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);
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->msg.complete = NULL;
rc = spi_async(lp->spi, &ctx->msg);
if (rc)
at86rf230_async_error(lp, ctx, rc);
}
}
static void
@ -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);