Commit 29692d05 authored Jun 25, 2013 by Darren Hart Committed by Greg Kroah-Hartman Jun 25, 2013

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>

parent 91f8c2d8

drivers/tty/serial/pch_uart.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -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;
		}

Admin message