diff options
| author | Fabio Estevam <fabio.estevam@freescale.com> | 2013-07-01 21:14:21 (GMT) |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2013-08-05 08:09:12 (GMT) |
| commit | d6e102f498cbcc8dd2e36721a01213f036397112 (patch) | |
| tree | cd08e606e0afcdb7b91870957ae250386f3fceab /drivers/i2c/i2c-core.c | |
| parent | c095ba7224d8edc71dcef0d655911399a8bd4a3f (diff) | |
| download | linux-fsl-qoriq-d6e102f498cbcc8dd2e36721a01213f036397112.tar.xz | |
i2c: i2c-mxs: Use DMA mode even for small transfers
Recently we have been seing some reports about PIO mode not working properly.
- http://www.spinics.net/lists/linux-i2c/msg11985.html
- http://marc.info/?l=linux-i2c&m=137235593101385&w=2
- https://lkml.org/lkml/2013/6/24/430
Let's use DMA mode even for small transfers.
Without this patch, i2c reads the incorrect sgtl5000 version on a mx28evk when
touchscreen is enabled:
[ 5.856270] sgtl5000 0-000a: Device with ID register 0 is not a sgtl5000
[ 9.877307] sgtl5000 0-000a: ASoC: failed to probe CODEC -19
[ 9.883528] mxs-sgtl5000 sound.12: ASoC: failed to instantiate card -19
[ 9.892955] mxs-sgtl5000 sound.12: snd_soc_register_card failed (-19)
Cc: <stable@vger.kernel.org>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Marek Vasut <marex@denx.de>
[wsa: we have a proper solution for -next, so this non intrusive
solution is OK for now]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c/i2c-core.c')
0 files changed, 0 insertions, 0 deletions