On Tue, Jun 25, 2013 at 06:53:22PM -0700, Darren Hart wrote:
> 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@xxxxxxxxxxxxxxx>
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Cc: Jiri Slaby <jslaby@xxxxxxx>
> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
> Cc: Peter Waskiewicz <peter.p.waskiewicz.jr@xxxxxxxxx>
> Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> Cc: linux-serial@xxxxxxxxxxxxxxx
> ---
> 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;
> +
You know, we do have the DMI interface to handle this in a much nicer
way instead of just randomly trying different strings over and over
until we find one that matches...
greg k-h
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