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    Subject[PATCH 040/145] pch_uart: Add uart_clk selection for the MinnowBoard
    Date
    3.8.13.5 -stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Darren Hart <dvhart@linux.intel.com>

    commit 29692d05647cb7ecea56242241f77291d5624b95 upstream.

    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>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
    ---
    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 8318925..a9e4be7 100644
    --- a/drivers/tty/serial/pch_uart.c
    +++ b/drivers/tty/serial/pch_uart.c
    @@ -214,6 +214,7 @@ 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;
    @@ -395,6 +396,10 @@ 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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