| Date | Thu, 16 Mar 2023 11:04:32 +0100 | From | Simon Horman <> | Subject | Re: [PATCH v3 07/16] can: m_can: Implement receive coalescing |
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On Wed, Mar 15, 2023 at 12:05:37PM +0100, Markus Schneider-Pargmann wrote: > m_can offers the possibility to set an interrupt on reaching a watermark > level in the receive FIFO. This can be used to implement coalescing. > Unfortunately there is no hardware timeout available to trigger an > interrupt if only a few messages were received within a given time. To > solve this I am using a hrtimer to wake up the irq thread after x > microseconds. > > The timer is always started if receive coalescing is enabled and new > received frames were available during an interrupt. The timer is stopped > if during a interrupt handling no new data was available. > > If the timer is started the new item interrupt is disabled and the > watermark interrupt takes over. If the timer is not started again, the > new item interrupt is enabled again, notifying the handler about every > new item received. > > Signed-off-by: Markus Schneider-Pargmann <msp@baylibre.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
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