The kt serial port intermittently reports unreliable data in its IIR
register and needs to reset fifos to stay in sync with firmware when the
device is reset.
The IIR fixes that went into 3.3 were not complete so patch 3 replaces
them with an explicit way to turn on UART_BUG_THRE (i.e. the "I don't
trust my iir" flag).
A new fix for resetting the fifos on device reset is patch 5. Alan
asked to make this a new quirk rather than add more workarounds to the
core (patch 4).
Patch 6 is an untested RFC / RFT from anyone that has a serial
suspend/resume use case with an 'init' quirk that has resources that
need de-allocation at 'exit'.
--
Dan
---
Dan Williams (5):
Revert "serial/8250_pci: init-quirk msi support for kt serial controller"
Revert "serial/8250_pci: setup-quirk workaround for the kt serial controller"
serial/8250_pci: add a "force background timer" flag and use it for the "kt" serial port
tegra, serial8250: add ->handle_break() uart_port op
serial/8250_pci: fix suspend/resume vs init/exit quirks
Sudhakar Mamillapalli (1):
serial/8250_pci: Clear FIFOs for Intel ME Serial Over Lan device on BI
arch/arm/mach-tegra/board-harmony.c | 1 +
arch/arm/mach-tegra/board-paz00.c | 2 +
arch/arm/mach-tegra/board-seaboard.c | 1 +
arch/arm/mach-tegra/board-trimslice.c | 1 +
arch/arm/mach-tegra/devices.c | 18 ++++++++++
arch/arm/mach-tegra/devices.h | 2 +
drivers/tty/serial/8250/8250.c | 56 ++++++++++--------------------
drivers/tty/serial/8250/8250.h | 2 +
drivers/tty/serial/8250/8250_pci.c | 61 +++++++++++++++++++++++++--------
include/linux/serial_8250.h | 1 +
include/linux/serial_core.h | 7 +++-
11 files changed, 99 insertions(+), 53 deletions(-)
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