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| author | Darren Hart <dvhart@linux.intel.com> | 2013-06-25 18:53:22 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-06-25 21:24:11 -0700 |
| commit | 29692d05647cb7ecea56242241f77291d5624b95 (patch) | |
| tree | e7c5251b35e15b4df66e959d13fa7acbd8e3f9a8 /drivers/tty | |
| parent | 91f8c2d805f5c5fd82bf8655065148b2e16967ff (diff) | |
| download | linux-29692d05647cb7ecea56242241f77291d5624b95.tar.gz linux-29692d05647cb7ecea56242241f77291d5624b95.tar.bz2 linux-29692d05647cb7ecea56242241f77291d5624b95.zip | |
pch_uart: Add uart_clk selection for the MinnowBoard
Use DMI_BOARD_NAME to determine if we are running on a MinnowBoard and
set the uart clock to 50MHz if so. This removes the need to pass the
user_uartclk to the kernel at boot time.
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Peter Waskiewicz <peter.p.waskiewicz.jr@intel.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/pch_uart.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c index 21a7e179edf3..572d48189de9 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -217,6 +217,7 @@ enum { #define FRI2_64_UARTCLK 64000000 /* 64.0000 MHz */ #define FRI2_48_UARTCLK 48000000 /* 48.0000 MHz */ #define NTC1_UARTCLK 64000000 /* 64.0000 MHz */ +#define MINNOW_UARTCLK 50000000 /* 50.0000 MHz */ struct pch_uart_buffer { unsigned char *buf; @@ -398,6 +399,10 @@ static int pch_uart_get_uartclk(void) strstr(cmp, "nanoETXexpress-TT"))) return NTC1_UARTCLK; + cmp = dmi_get_system_info(DMI_BOARD_NAME); + if (cmp && strstr(cmp, "MinnowBoard")) + return MINNOW_UARTCLK; + return DEFAULT_UARTCLK; } |