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>

diff --git a/drivers/net/ieee802154/adf7242.c b/drivers/net/ieee802154/adf7242.c
index c3da431..23a52b9 100644 (file)
--- 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);