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| author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-11-28 10:22:38 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-11-28 10:22:38 +0100 |
| commit | d033a308d81ec83908760a15a841c2bd0d5e0ea3 (patch) | |
| tree | 647abd67987fe4d7fee80105fc823edf3f53b4f6 /drivers/i2c/busses/i2c-at91.c | |
| parent | [media] dma-mapping: fix dma_common_get_sgtable() conditional compilation (diff) | |
| parent | Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git... (diff) | |
| download | linux-d033a308d81ec83908760a15a841c2bd0d5e0ea3.tar.xz linux-d033a308d81ec83908760a15a841c2bd0d5e0ea3.zip | |
Merge remote-tracking branch 'linus/master' into staging/for_v3.8
* linus/master: (1428 commits)
futex: avoid wake_futex() for a PI futex_q
watchdog: using u64 in get_sample_period()
writeback: put unused inodes to LRU after writeback completion
mm: vmscan: check for fatal signals iff the process was throttled
Revert "mm: remove __GFP_NO_KSWAPD"
proc: check vma->vm_file before dereferencing
UAPI: strip the _UAPI prefix from header guards during header installation
include/linux/bug.h: fix sparse warning related to BUILD_BUG_ON_INVALID
Linux 3.7-rc7
powerpc/eeh: Do not invalidate PE properly
ALSA: hda - Fix build without CONFIG_PM
of/address: sparc: Declare of_iomap as an extern function for sparc again
PM / QoS: fix wrong error-checking condition
bnx2x: remove redundant warning log
vxlan: fix command usage in its doc
8139cp: revert "set ring address before enabling receiver"
MPI: Fix compilation on MIPS with GCC 4.4 and newer
MIPS: Fix crash that occurs when function tracing is enabled
MIPS: Merge overlapping bootmem ranges
jbd: Fix lock ordering bug in journal_unmap_buffer()
...
Diffstat (limited to 'drivers/i2c/busses/i2c-at91.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-at91.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c index aa59a254be2c..c02bf208084f 100644 --- a/drivers/i2c/busses/i2c-at91.c +++ b/drivers/i2c/busses/i2c-at91.c @@ -39,6 +39,7 @@ #define AT91_TWI_STOP 0x0002 /* Send a Stop Condition */ #define AT91_TWI_MSEN 0x0004 /* Master Transfer Enable */ #define AT91_TWI_SVDIS 0x0020 /* Slave Transfer Disable */ +#define AT91_TWI_QUICK 0x0040 /* SMBus quick command */ #define AT91_TWI_SWRST 0x0080 /* Software Reset */ #define AT91_TWI_MMR 0x0004 /* Master Mode Register */ @@ -212,7 +213,11 @@ static int at91_do_twi_transfer(struct at91_twi_dev *dev) INIT_COMPLETION(dev->cmd_complete); dev->transfer_status = 0; - if (dev->msg->flags & I2C_M_RD) { + + if (!dev->buf_len) { + at91_twi_write(dev, AT91_TWI_CR, AT91_TWI_QUICK); + at91_twi_write(dev, AT91_TWI_IER, AT91_TWI_TXCOMP); + } else if (dev->msg->flags & I2C_M_RD) { unsigned start_flags = AT91_TWI_START; if (at91_twi_read(dev, AT91_TWI_SR) & AT91_TWI_RXRDY) { |