On 10/19/2015 11:36 PM, Masahiro Yamada wrote:
> Currently, 8-bit (MMIO) and 32-bit (MMIO32) register strides are
> supported for the 8250 console, but 16-bit (MMIO16) stride is not.
> The 8250 UART device on my board is connected to a 16-bit bus
> (reg-shift = <1>) and I am eager to use earlycon with it.
>
> Refer to arch/arm/boot/dts/uniphier-support-card.dtsi:
>
> serialsc: uart@000b0000 {
> compatible = "ns16550a";
> reg = <0x000b0000 0x20>;
> clock-frequency = <12288000>;
> reg-shift = <1>;
> };
>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
> ---
>
> Changes in v2:
> - Do not change userspace-exported macros
>
> Documentation/kernel-parameters.txt | 9 +++++----
> drivers/tty/serial/8250/8250_early.c | 5 +++++
> drivers/tty/serial/8250/8250_port.c | 20 ++++++++++++++++++++
> drivers/tty/serial/earlycon.c | 15 +++++++++++----
> drivers/tty/serial/serial_core.c | 9 +++++++--
> include/linux/serial_core.h | 1 +
> include/uapi/linux/serial.h | 1 +
> 7 files changed, 50 insertions(+), 10 deletions(-)
[...]
> diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
> index 603d2cc..325acce 100644
> --- a/drivers/tty/serial/serial_core.c
> +++ b/drivers/tty/serial/serial_core.c
> @@ -1819,8 +1819,8 @@ uart_get_console(struct uart_port *ports, int nr, struct console *co)
> * @options: ptr for <options> field; NULL if not present (out)
> *
> * Decodes earlycon kernel command line parameters of the form
> - * earlycon=<name>,io|mmio|mmio32|mmio32be,<addr>,<options>
> - * console=<name>,io|mmio|mmio32|mmio32be,<addr>,<options>
> + * earlycon=<name>,io|mmio|mmio16|mmio32|mmio32be,<addr>,<options>
> + * console=<name>,io|mmio|mmio16|mmio32|mmio32be,<addr>,<options>
> *
> * The optional form
> * earlycon=<name>,0x<addr>,<options>
This hunk fails to apply. Please rebase on top of tty-next branch of
Greg's tty.git tree (git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git)
Regards,
Peter Hurley
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