diff options
| author | Kevin Cernekee <cernekee@gmail.com> | 2014-10-22 00:23:02 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-06 23:57:24 +0100 |
| commit | 1ab8e4b1acdf39ebe6002bbe07ef6e578cff5d74 (patch) | |
| tree | c6e8ae09bee04390f3ea37c669493c52d7e55f0c /drivers/tty/serial/bcm63xx_uart.c | |
| parent | Documentation: DT: Add entries for bcm63xx UART (diff) | |
| download | linux-1ab8e4b1acdf39ebe6002bbe07ef6e578cff5d74.tar.xz linux-1ab8e4b1acdf39ebe6002bbe07ef6e578cff5d74.zip | |
tty: serial: bcm63xx: Enable DT earlycon support
This enables early console output if there is a chosen/stdout-path
property referencing a UART node with the "brcm,bcm6345-uart" compatible
string. The bootloader sets up the pinmux and baud/parity/etc.
Tested on bcm3384 (MIPS, DT).
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/bcm63xx_uart.c')
| -rw-r--r-- | drivers/tty/serial/bcm63xx_uart.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/tty/serial/bcm63xx_uart.c b/drivers/tty/serial/bcm63xx_uart.c index b615af2230aa..109dea711318 100644 --- a/drivers/tty/serial/bcm63xx_uart.c +++ b/drivers/tty/serial/bcm63xx_uart.c @@ -782,6 +782,26 @@ static int __init bcm63xx_console_init(void) console_initcall(bcm63xx_console_init); +static void bcm_early_write(struct console *con, const char *s, unsigned n) +{ + struct earlycon_device *dev = con->data; + + uart_console_write(&dev->port, s, n, bcm_console_putchar); + wait_for_xmitr(&dev->port); +} + +static int __init bcm_early_console_setup(struct earlycon_device *device, + const char *opt) +{ + if (!device->port.membase) + return -ENODEV; + + device->con->write = bcm_early_write; + return 0; +} + +OF_EARLYCON_DECLARE(bcm63xx_uart, "brcm,bcm6345-uart", bcm_early_console_setup); + #define BCM63XX_CONSOLE (&bcm63xx_console) #else #define BCM63XX_CONSOLE NULL |