diff options
| author | Vishal Singh <vissingh@nvidia.com> | 2012-09-26 16:50:48 +0530 |
|---|---|---|
| committer | Mrutyunjay Sawant <msawant@nvidia.com> | 2012-10-29 07:18:43 -0700 |
| commit | fdc356bd8ae3fb9d7084abc537eeb65ffd887758 (patch) | |
| tree | 60bfa7660fee1bf15111783635c12f36b3a0f51c /drivers/tty | |
| parent | 88163960f2a5cd2a6a73d7c89ca1aef0e8f4e89f (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>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/8250/8250.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.c b/drivers/tty/serial/8250/8250.c index 4c05387ca830..00872cd05119 100644 --- a/drivers/tty/serial/8250/8250.c +++ b/drivers/tty/serial/8250/8250.c @@ -912,6 +912,7 @@ 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 @@ -951,6 +952,7 @@ 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 591f8018e7dd..b794d1766a6a 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -159,6 +159,13 @@ 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 # |