net: ieee802154: adf7242: Fix OCL calibration runs

Reissuing RC_RX every 400ms - to adjust for offset drift in
receiver see datasheet page 61, OCL section.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>

1 files changed, 28 insertions, 1 deletions

diff --git a/drivers/net/ieee802154/adf7242.c b/drivers/net/ieee802154/adf7242.c
index c3da43191f70..23a52b9293f3 100644
--- a/drivers/net/ieee802154/adf7242.c
+++ b/drivers/net/ieee802154/adf7242.c
@@ -275,6 +275,8 @@ struct adf7242_local {
         struct spi_message stat_msg;
         struct spi_transfer stat_xfer;
         struct dentry *debugfs_root;
+        struct delayed_work work;
+        struct workqueue_struct *wqueue;
         unsigned long flags;
         int tx_stat;
         bool promiscuous;
@@ -575,10 +577,26 @@ static int adf7242_cmd_rx(struct adf7242_local *lp)
         /* Wait until the ACK is sent */
         adf7242_wait_status(lp, RC_STATUS_PHY_RDY, RC_STATUS_MASK, __LINE__);
         adf7242_clear_irqstat(lp);
+        mod_delayed_work(lp->wqueue, &lp->work, msecs_to_jiffies(400));
 
         return adf7242_cmd(lp, CMD_RC_RX);
 }
 
+static void adf7242_rx_cal_work(struct work_struct *work)
+{
+        struct adf7242_local *lp =
+        container_of(work, struct adf7242_local, work.work);
+
+        /* Reissuing RC_RX every 400ms - to adjust for offset
+         * drift in receiver (datasheet page 61, OCL section)
+         */
+
+        if (!test_bit(FLAG_XMIT, &lp->flags)) {
+                adf7242_cmd(lp, CMD_RC_PHY_RDY);
+                adf7242_cmd_rx(lp);
+        }
+}
+
 static int adf7242_set_txpower(struct ieee802154_hw *hw, int mbm)
 {
         struct adf7242_local *lp = hw->priv;
@@ -686,7 +704,7 @@ static int adf7242_start(struct ieee802154_hw *hw)
         enable_irq(lp->spi->irq);
         set_bit(FLAG_START, &lp->flags);
 
-        return adf7242_cmd(lp, CMD_RC_RX);
+        return adf7242_cmd_rx(lp);
 }
 
 static void adf7242_stop(struct ieee802154_hw *hw)
@@ -694,6 +712,7 @@ static void adf7242_stop(struct ieee802154_hw *hw)
         struct adf7242_local *lp = hw->priv;
 
         disable_irq(lp->spi->irq);
+        cancel_delayed_work_sync(&lp->work);
         adf7242_cmd(lp, CMD_RC_IDLE);
         clear_bit(FLAG_START, &lp->flags);
         adf7242_clear_irqstat(lp);
@@ -817,6 +836,7 @@ static int adf7242_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
         /* ensure existing instances of the IRQ handler have completed */
         disable_irq(lp->spi->irq);
         set_bit(FLAG_XMIT, &lp->flags);
+        cancel_delayed_work_sync(&lp->work);
         reinit_completion(&lp->tx_complete);
         adf7242_cmd(lp, CMD_RC_PHY_RDY);
         adf7242_clear_irqstat(lp);
@@ -955,6 +975,7 @@ static irqreturn_t adf7242_isr(int irq, void *data)
         unsigned int xmit;
         u8 irq1;
 
+        mod_delayed_work(lp->wqueue, &lp->work, msecs_to_jiffies(400));
         adf7242_read_reg(lp, REG_IRQ1_SRC1, &irq1);
 
         if (!(irq1 & (IRQ_RX_PKT_RCVD | IRQ_CSMA_CA)))
@@ -1244,6 +1265,9 @@ static int adf7242_probe(struct spi_device *spi)
         spi_message_add_tail(&lp->stat_xfer, &lp->stat_msg);
 
         spi_set_drvdata(spi, lp);
+        INIT_DELAYED_WORK(&lp->work, adf7242_rx_cal_work);
+        lp->wqueue = alloc_ordered_workqueue(dev_name(&spi->dev),
+                                             WQ_MEM_RECLAIM);
 
         ret = adf7242_hw_init(lp);
         if (ret)
@@ -1287,6 +1311,9 @@ static int adf7242_remove(struct spi_device *spi)
         if (!IS_ERR_OR_NULL(lp->debugfs_root))
                 debugfs_remove_recursive(lp->debugfs_root);
 
+        cancel_delayed_work_sync(&lp->work);
+        destroy_workqueue(lp->wqueue);
+
         ieee802154_unregister_hw(lp->hw);
         mutex_destroy(&lp->bmux);
         ieee802154_free_hw(lp->hw);