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| author | JP Abgrall <jpa@google.com> | 2012-04-24 21:45:20 -0700 |
|---|---|---|
| committer | JP Abgrall <jpa@google.com> | 2012-04-24 21:45:20 -0700 |
| commit | 10add970b62d2276541af9e5fb0581d6d8434db4 (patch) | |
| tree | afd79e8507c5fa243c044a6963072b6a6d0f059b /drivers/tty/serial/pxa.c | |
| parent | 9cea9c804af57f8538dc910e24c407c81e496e51 (diff) | |
| parent | 66510aa1148e3457e7d46e0a2582dac7c591b95d (diff) | |
| download | kernel_samsung_crespo-10add970b62d2276541af9e5fb0581d6d8434db4.zip kernel_samsung_crespo-10add970b62d2276541af9e5fb0581d6d8434db4.tar.gz kernel_samsung_crespo-10add970b62d2276541af9e5fb0581d6d8434db4.tar.bz2 | |
Merge remote-tracking branch 'common/android-3.0' into android-samsung-30-wip-mergedown
* common/android-3.0: (1178 commits)
cpufreq: interactive: remove unused target_validate_time_in_idle
cpufreq: interactive: Boost frequency on touchscreen input
cpufreq: Separate speed target revalidate time and initial set time
cpufreq: interactive: based hispeed bump on target freq, not actual
cpufreq: interactive: adjust code and documentation to match
cpufreq: interactive: configurable delay before raising above hispeed
sync: add poll support
sw_sync: add fill_driver_data support
sync: add ioctl to get fence data
sw_sync: add debug support
sync: add debugfs support
sync: add timestamps to sync_pts
sw_sync: add cpu based sync driver
sync: Add synchronization framework
Linux 3.0.28
Bluetooth: Fix l2cap conn failures for ssp devices
TOMOYO: Fix mount flags checking order.
iommu/amd: Make sure IOMMU interrupts are re-enabled on resume
cred: copy_process() should clear child->replacement_session_keyring
ASoC: ak4642: fixup: mute needs +1 step
...
Conflicts:
mm/compaction.c
Change-Id: I3dc59225d2435eddbed0c639155179e580891ac8
Signed-off-by: JP Abgrall <jpa@google.com>
Diffstat (limited to 'drivers/tty/serial/pxa.c')
| -rw-r--r-- | drivers/tty/serial/pxa.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c index 4302e6e..81243a6 100644 --- a/drivers/tty/serial/pxa.c +++ b/drivers/tty/serial/pxa.c @@ -100,6 +100,16 @@ static inline void receive_chars(struct uart_pxa_port *up, int *status) int max_count = 256; do { + /* work around Errata #20 according to + * Intel(R) PXA27x Processor Family + * Specification Update (May 2005) + * + * Step 2 + * Disable the Reciever Time Out Interrupt via IER[RTOEI] + */ + up->ier &= ~UART_IER_RTOIE; + serial_out(up, UART_IER, up->ier); + ch = serial_in(up, UART_RX); flag = TTY_NORMAL; up->port.icount.rx++; @@ -156,6 +166,16 @@ static inline void receive_chars(struct uart_pxa_port *up, int *status) *status = serial_in(up, UART_LSR); } while ((*status & UART_LSR_DR) && (max_count-- > 0)); tty_flip_buffer_push(tty); + + /* work around Errata #20 according to + * Intel(R) PXA27x Processor Family + * Specification Update (May 2005) + * + * Step 6: + * No more data in FIFO: Re-enable RTO interrupt via IER[RTOIE] + */ + up->ier |= UART_IER_RTOIE; + serial_out(up, UART_IER, up->ier); } static void transmit_chars(struct uart_pxa_port *up) |