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@xxxxxxxxx>
Reviewed-by: Varka Bhadram <varkabhadram@xxxxxxxxx>
---
drivers/net/ieee802154/at86rf230.c | 27 +++++++++++++++++++++------
1 file changed, 21 insertions(+), 6 deletions(-)
diff --git a/drivers/net/ieee802154/at86rf230.c b/drivers/net/ieee802154/at86rf230.c
index 05ef56d..67d00fb 100644
--- a/drivers/net/ieee802154/at86rf230.c
+++ b/drivers/net/ieee802154/at86rf230.c
@@ -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);
--
2.3.6
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