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can: mcp251xfd: move mcp251xfd_timestamp_start()/stop() into mcp251xfd_chip_start/stop()

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commit a7801540f3 upstream.

The mcp251xfd wakes up from Low Power or Sleep Mode when SPI activity
is detected. To avoid this, make sure that the timestamp worker is
stopped before shutting down the chip.

Split the starting of the timestamp worker out of
mcp251xfd_timestamp_init() into the separate function
mcp251xfd_timestamp_start().

Call mcp251xfd_timestamp_init() before mcp251xfd_chip_start(), move
mcp251xfd_timestamp_start() to mcp251xfd_chip_start(). In this way,
mcp251xfd_timestamp_stop() can be called unconditionally by
mcp251xfd_chip_stop().

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Marc Kleine-Budde 2023-01-11 12:10:04 +01:00 committed by Greg Kroah-Hartman
parent fa45741f1e
commit 3a2532d882
3 changed files with 11 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
View File

@ -744,6 +744,7 @@ static void mcp251xfd_chip_stop(struct mcp251xfd_priv *priv,
mcp251xfd_chip_interrupts_disable(priv);
mcp251xfd_chip_rx_int_disable(priv);
mcp251xfd_timestamp_stop(priv);
mcp251xfd_chip_sleep(priv);
}
@ -763,6 +764,8 @@ static int mcp251xfd_chip_start(struct mcp251xfd_priv *priv)
if (err)
goto out_chip_stop;
mcp251xfd_timestamp_start(priv);
err = mcp251xfd_set_bittiming(priv);
if (err)
goto out_chip_stop;
@ -1610,11 +1613,12 @@ static int mcp251xfd_open(struct net_device *ndev)
if (err)
goto out_mcp251xfd_ring_free;
mcp251xfd_timestamp_init(priv);
err = mcp251xfd_chip_start(priv);
if (err)
goto out_transceiver_disable;
mcp251xfd_timestamp_init(priv);
clear_bit(MCP251XFD_FLAGS_DOWN, priv->flags);
can_rx_offload_enable(&priv->offload);
@ -1648,7 +1652,6 @@ out_destroy_workqueue:
out_can_rx_offload_disable:
can_rx_offload_disable(&priv->offload);
set_bit(MCP251XFD_FLAGS_DOWN, priv->flags);
mcp251xfd_timestamp_stop(priv);
out_transceiver_disable:
mcp251xfd_transceiver_disable(priv);
out_mcp251xfd_ring_free:
@ -1674,7 +1677,6 @@ static int mcp251xfd_stop(struct net_device *ndev)
free_irq(ndev->irq, priv);
destroy_workqueue(priv->wq);
can_rx_offload_disable(&priv->offload);
mcp251xfd_timestamp_stop(priv);
mcp251xfd_chip_stop(priv, CAN_STATE_STOPPED);
mcp251xfd_transceiver_disable(priv);
mcp251xfd_ring_free(priv);

7
drivers/net/can/spi/mcp251xfd/mcp251xfd-timestamp.c
View File

@ -48,9 +48,12 @@ void mcp251xfd_timestamp_init(struct mcp251xfd_priv *priv)
cc->shift = 1;
cc->mult = clocksource_hz2mult(priv->can.clock.freq, cc->shift);
timecounter_init(&priv->tc, &priv->cc, ktime_get_real_ns());
INIT_DELAYED_WORK(&priv->timestamp, mcp251xfd_timestamp_work);
}
void mcp251xfd_timestamp_start(struct mcp251xfd_priv *priv)
{
timecounter_init(&priv->tc, &priv->cc, ktime_get_real_ns());
schedule_delayed_work(&priv->timestamp,
MCP251XFD_TIMESTAMP_WORK_DELAY_SEC * HZ);
}

1
drivers/net/can/spi/mcp251xfd/mcp251xfd.h
View File

@ -957,6 +957,7 @@ int mcp251xfd_ring_alloc(struct mcp251xfd_priv *priv);
int mcp251xfd_handle_rxif(struct mcp251xfd_priv *priv);
int mcp251xfd_handle_tefif(struct mcp251xfd_priv *priv);
void mcp251xfd_timestamp_init(struct mcp251xfd_priv *priv);
void mcp251xfd_timestamp_start(struct mcp251xfd_priv *priv);
void mcp251xfd_timestamp_stop(struct mcp251xfd_priv *priv);
void mcp251xfd_tx_obj_write_sync(struct work_struct *work);