diff options
| author | Tony Lindgren <tony@atomide.com> | 2011-05-24 00:45:06 -0700 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2011-05-24 00:45:06 -0700 |
| commit | 9b28b11e2a648f07c8481b9666ccf1c088e1ab74 (patch) | |
| tree | ac3db2d4ae69e393d8423bb8c9304c75023dc805 /drivers/input/touchscreen/ads7846.c | |
| parent | b7679ab3f70482ff4b75a8c735c8224ebedb6020 (diff) | |
| parent | 99aa18278e867574d72201b806f82ace07d4804b (diff) | |
Merge branch 'for_2.6.40/pm-cleanup' of ssh://master.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm into omap-for-linus
Diffstat (limited to 'drivers/input/touchscreen/ads7846.c')
| -rw-r--r-- | drivers/input/touchscreen/ads7846.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c index c24946f5125..1de1c19dad3 100644 --- a/drivers/input/touchscreen/ads7846.c +++ b/drivers/input/touchscreen/ads7846.c @@ -281,17 +281,24 @@ struct ser_req { u8 command; u8 ref_off; u16 scratch; - __be16 sample; struct spi_message msg; struct spi_transfer xfer[6]; + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + */ + __be16 sample ____cacheline_aligned; }; struct ads7845_ser_req { u8 command[3]; - u8 pwrdown[3]; - u8 sample[3]; struct spi_message msg; struct spi_transfer xfer[2]; + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + */ + u8 sample[3] ____cacheline_aligned; }; static int ads7846_read12_ser(struct device *dev, unsigned command) |