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Message-Id: <6cc125b9eb85dd3cae4a2496fdb7f0d17b18f930.1372211451.git.dvhart@linux.intel.com>
Date: Tue, 25 Jun 2013 18:53:22 -0700
From: Darren Hart <dvhart@...ux.intel.com>
To: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
"H. Peter Anvin" <hpa@...or.com>, peter.p.waskiewicz.jr@...el.com,
andriy.shevchenko@...ux.intel.com, danders@...cuitco.com,
vishal.l.verma@...el.com, dvhart@...ux.intel.com
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Jiri Slaby <jslaby@...e.cz>, linux-serial@...r.kernel.org
Subject: [PATCH 2/8] 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@...ux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Jiri Slaby <jslaby@...e.cz>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Peter Waskiewicz <peter.p.waskiewicz.jr@...el.com>
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: linux-serial@...r.kernel.org
---
drivers/tty/serial/pch_uart.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index 21a7e17..572d481 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;
}
--
1.8.1.2
--
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