From: Barry Song <21cnbao@gmail.com> To: Sonic Zhang <sonic.adi@gmail.com> Cc: Grant Likely <grant.likely@secretlab.ca>, spi-devel-general@lists.sourceforge.net, LKML <linux-kernel@vger.kernel.org>, uclinux-dist-devel@blackfin.uclinux.org Subject: Re: [uclinux-dist-devel] [PATCH v2] spi:spi_bfin5xx: SPI SSEL deasserted too early in soft irq mode. Date: Thu, 1 Sep 2011 20:52:54 +0800 [thread overview] Message-ID: <CAGsJ_4xGJoz7JNQHBtK7pC+sn+pUZsibgiBNPnL=Vdyii-JsDA@mail.gmail.com> (raw) In-Reply-To: <1313117333-26763-1-git-send-email-sonic.adi@gmail.com> 2011/8/12 Sonic Zhang <sonic.adi@gmail.com>: > From: Sonic Zhang <sonic.zhang@analog.com> > > Poll the FIFO till it is empty before deassert SSEL in pump_transfers in > soft irq mode. No polling is necessary in interrupt mode and error handling. > > Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Acked-by: Barry Song <21cnbao@gmail.com> it is actually making sure the last message is finished. > --- > drivers/spi/spi-bfin5xx.c | 5 ++++- > 1 files changed, 4 insertions(+), 1 deletions(-) > > diff --git a/drivers/spi/spi-bfin5xx.c b/drivers/spi/spi-bfin5xx.c > index b8d25f2..7e03e7d 100644 > --- a/drivers/spi/spi-bfin5xx.c > +++ b/drivers/spi/spi-bfin5xx.c > @@ -587,6 +587,7 @@ static void bfin_spi_pump_transfers(unsigned long data) > if (message->state == DONE_STATE) { > dev_dbg(&drv_data->pdev->dev, "transfer: all done!\n"); > message->status = 0; > + bfin_spi_flush(drv_data); > bfin_spi_giveback(drv_data); > return; > } > @@ -870,8 +871,10 @@ static void bfin_spi_pump_transfers(unsigned long data) > message->actual_length += drv_data->len_in_bytes; > /* Move to next transfer of this msg */ > message->state = bfin_spi_next_transfer(drv_data); > - if (drv_data->cs_change) > + if (drv_data->cs_change) { > + bfin_spi_flush(drv_data); > bfin_spi_cs_deactive(drv_data, chip); > + } > } > > /* Schedule next transfer tasklet */ > -- > 1.7.0.4 > > > _______________________________________________ > Uclinux-dist-devel mailing list > Uclinux-dist-devel@blackfin.uclinux.org > https://blackfin.uclinux.org/mailman/listinfo/uclinux-dist-devel
WARNING: multiple messages have this Message-ID (diff)
From: Barry Song <21cnbao-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> To: Sonic Zhang <sonic.adi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> Cc: spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, uclinux-dist-devel-ZG0+EudsQA8dtHy/vicBwGD2FQJk+8+b@public.gmane.org Subject: Re: [uclinux-dist-devel] [PATCH v2] spi:spi_bfin5xx: SPI SSEL deasserted too early in soft irq mode. Date: Thu, 1 Sep 2011 20:52:54 +0800 [thread overview] Message-ID: <CAGsJ_4xGJoz7JNQHBtK7pC+sn+pUZsibgiBNPnL=Vdyii-JsDA@mail.gmail.com> (raw) In-Reply-To: <1313117333-26763-1-git-send-email-sonic.adi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 2011/8/12 Sonic Zhang <sonic.adi@gmail.com>: > From: Sonic Zhang <sonic.zhang@analog.com> > > Poll the FIFO till it is empty before deassert SSEL in pump_transfers in > soft irq mode. No polling is necessary in interrupt mode and error handling. > > Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Acked-by: Barry Song <21cnbao@gmail.com> it is actually making sure the last message is finished. > --- > drivers/spi/spi-bfin5xx.c | 5 ++++- > 1 files changed, 4 insertions(+), 1 deletions(-) > > diff --git a/drivers/spi/spi-bfin5xx.c b/drivers/spi/spi-bfin5xx.c > index b8d25f2..7e03e7d 100644 > --- a/drivers/spi/spi-bfin5xx.c > +++ b/drivers/spi/spi-bfin5xx.c > @@ -587,6 +587,7 @@ static void bfin_spi_pump_transfers(unsigned long data) > if (message->state == DONE_STATE) { > dev_dbg(&drv_data->pdev->dev, "transfer: all done!\n"); > message->status = 0; > + bfin_spi_flush(drv_data); > bfin_spi_giveback(drv_data); > return; > } > @@ -870,8 +871,10 @@ static void bfin_spi_pump_transfers(unsigned long data) > message->actual_length += drv_data->len_in_bytes; > /* Move to next transfer of this msg */ > message->state = bfin_spi_next_transfer(drv_data); > - if (drv_data->cs_change) > + if (drv_data->cs_change) { > + bfin_spi_flush(drv_data); > bfin_spi_cs_deactive(drv_data, chip); > + } > } > > /* Schedule next transfer tasklet */ > -- > 1.7.0.4 > > > _______________________________________________ > Uclinux-dist-devel mailing list > Uclinux-dist-devel@blackfin.uclinux.org > https://blackfin.uclinux.org/mailman/listinfo/uclinux-dist-devel ------------------------------------------------------------------------------ Special Offer -- Download ArcSight Logger for FREE! Finally, a world-class log management solution at an even better price-free! And you'll get a free "Love Thy Logs" t-shirt when you download Logger. Secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsisghtdev2dev _______________________________________________ spi-devel-general mailing list spi-devel-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/spi-devel-general
next prev parent reply other threads:[~2011-09-01 12:53 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-08-12 2:48 [PATCH v2] spi:spi_bfin5xx: SPI SSEL deasserted too early in soft irq mode Sonic Zhang 2011-08-23 8:16 ` Sonic Zhang 2011-09-01 12:52 ` Barry Song [this message] 2011-09-01 12:52 ` [uclinux-dist-devel] " Barry Song
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