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authorDarren Hart <dvhart@linux.intel.com>2013-06-25 18:53:22 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-06-25 21:24:11 -0700
commit29692d05647cb7ecea56242241f77291d5624b95 (patch)
treee7c5251b35e15b4df66e959d13fa7acbd8e3f9a8 /drivers/tty/serial/pch_uart.c
parent91f8c2d805f5c5fd82bf8655065148b2e16967ff (diff)
downloadlinux-29692d05647cb7ecea56242241f77291d5624b95.tar.bz2
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/serial/pch_uart.c')
-rw-r--r--drivers/tty/serial/pch_uart.c5
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;
}