| Message ID | 1377817545-18015-4-git-send-email-joelf@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 8/30/2013 4:35 AM, Joel Fernandes wrote: > Manual trigger for events missed as a result of splitting a > scatter gather list and DMA'ing it in batches. Add a helper > function to trigger a channel incase any such events are missed. > > Signed-off-by: Joel Fernandes <joelf@ti.com> Acked-by: Sekhar Nori <nsekhar@ti.com> Thanks, Sekhar
diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c index 3567ba1..67e8cf5 100644 --- a/arch/arm/common/edma.c +++ b/arch/arm/common/edma.c @@ -1236,6 +1236,23 @@ void edma_resume(unsigned channel) } EXPORT_SYMBOL(edma_resume); +int edma_trigger_channel(unsigned channel) +{ + unsigned ctlr; + unsigned int mask; + + ctlr = EDMA_CTLR(channel); + channel = EDMA_CHAN_SLOT(channel); + mask = BIT(channel & 0x1f); + + edma_shadow0_write_array(ctlr, SH_ESR, (channel >> 5), mask); + + pr_debug("EDMA: ESR%d %08x\n", (channel >> 5), + edma_shadow0_read_array(ctlr, SH_ESR, (channel >> 5))); + return 0; +} +EXPORT_SYMBOL(edma_trigger_channel); + /** * edma_start - start dma on a channel * @channel: channel being activated diff --git a/include/linux/platform_data/edma.h b/include/linux/platform_data/edma.h index 57300fd..179fb91 100644 --- a/include/linux/platform_data/edma.h +++ b/include/linux/platform_data/edma.h @@ -180,4 +180,6 @@ struct edma_soc_info { const s16 (*xbar_chans)[2]; }; +int edma_trigger_channel(unsigned); + #endif
Manual trigger for events missed as a result of splitting a scatter gather list and DMA'ing it in batches. Add a helper function to trigger a channel incase any such events are missed. Signed-off-by: Joel Fernandes <joelf@ti.com> --- arch/arm/common/edma.c | 17 +++++++++++++++++ include/linux/platform_data/edma.h | 2 ++ 2 files changed, 19 insertions(+)