diff options
| author | Vishal Singh <vissingh@nvidia.com> | 2012-09-26 16:50:48 +0530 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2013-09-14 01:10:24 -0700 |
| commit | b58ef08071b8bd9b65b4e24f54f3387c9803224c (patch) | |
| tree | d12b7dd5d1f1e4f286f43c8893c0e60a74dbe7ad /drivers/tty | |
| parent | 86043d2aed208bf95fefcddddaf9bf68c0837216 (diff) | |
serial: 8250: Fix for Initial high frequency pulse
An intial high frequency pluse is seen while checking
for a National Semiconductor SuperIO chip. Disabling the
check by default.
Reviewed-on: http://git-master/r/131698
Change-Id: I6950958d8949fb7e02fe2fe1b5716223d4b0e23e
Signed-off-by: Vishal Singh <vissingh@nvidia.com>
Reviewed-on: http://git-master/r/138941
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
Rebase-Id: R638951e83c44e4ce27d9f89833dc9d16cef5ed3b
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/8250/8250_core.c | 2 | ||||
| -rw-r--r-- | drivers/tty/serial/8250/Kconfig | 7 |
2 files changed, 9 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index b0d6afe984b6..4a93eb65ddf7 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -917,6 +917,7 @@ static void autoconfig_16550a(struct uart_8250_port *up) return; } +#ifdef CONFIG_HAS_NS_SUPER_IO_CHIP /* * Check for a National Semiconductor SuperIO chip. * Attempt to switch to bank 2, read the value of the LOOP bit @@ -956,6 +957,7 @@ static void autoconfig_16550a(struct uart_8250_port *up) return; } } +#endif /* * No EFR. Try to detect a TI16750, which only sets bit 5 of diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index 80fe91e64a52..4681c8e7abad 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -184,6 +184,13 @@ config SERIAL_8250_MANY_PORTS say N here to save some memory. You can also say Y if you have an "intelligent" multiport card such as Cyclades, Digiboards, etc. +config HAS_NS_SUPER_IO_CHIP + bool "Support National Semiconductor SuperIO chip" + depends on SERIAL_8250 + default n + help + Say Y here If you wish to use National Semiconductor SuperIO chip + # # Multi-port serial cards # |