Hi Nicolas,
On 02/07/2016 05:38 PM, Nicolas Saenz Julienne wrote:
> Signed-off-by: Nicolas Saenz Julienne <nicolassaenzj@xxxxxxxxx>
> ---
> Documentation/kernel-parameters.txt | 6 ++++++
> drivers/tty/serial/meson_uart.c | 22 ++++++++++++++++++++++
> 2 files changed, 28 insertions(+)
>
> diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
> index 551ecf0..1661af4 100644
> --- a/Documentation/kernel-parameters.txt
> +++ b/Documentation/kernel-parameters.txt
> @@ -1025,6 +1025,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
> the driver will use only 32-bit accessors to read/write
> the device registers.
>
> + meson,<addr>
> + Start an early, polled-mode console on an meson serial
> + port at the specified address. The serial port
> + must already be setup and configured. Options are not
> + yet supported.
> +
> msm_serial,<addr>
> Start an early, polled-mode console on an msm serial
> port at the specified address. The serial port
> diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
> index b12a37b..f6ff2fa 100644
> --- a/drivers/tty/serial/meson_uart.c
> +++ b/drivers/tty/serial/meson_uart.c
> @@ -548,6 +548,28 @@ static int __init meson_serial_console_init(void)
> }
> console_initcall(meson_serial_console_init);
>
> +static void meson_early_console_write(struct console *con, const char *s,
> + unsigned n)
^^^^^^^^
I don't really care, but it's customary to use 'unsigned int'.
> +{
> + struct earlycon_device *dev = con->data;
> +
> + uart_console_write(&dev->port, s, n, meson_console_putchar);
> +}
> +
> +static int __init meson_early_console_setup(struct earlycon_device *device,
> + const char *opt)
> +{
> + if (!device->port.membase)
> + return -ENODEV;
> +
> + device->con->write = meson_early_console_write;
> + return 0;
> +}
> +
> +EARLYCON_DECLARE(meson, meson_early_console_setup);
> +OF_EARLYCON_DECLARE(meson, "amlogic,meson-uart",
> + meson_early_console_setup);
> +
With today's linux-next (or Greg's tty-next tree), it is no longer necessary to
declare separate earlycon's when you want both; OF_EARLYCON_DECLARE() declares
both a devicetree-enabled earlycon and automatically provides for a command line
earlycon of the same name.
Regards,
Peter Hurley
> #define MESON_SERIAL_CONSOLE (&meson_serial_console)
> #else
> #define MESON_SERIAL_CONSOLE NULL
>
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