diff options
| author | Stefan Agner <stefan@agner.ch> | 2015-10-17 00:45:55 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-10-17 21:18:30 -0700 |
| commit | 1d59b382f1c4111933ab56166eb520ac98676b22 (patch) | |
| tree | 90c029df49ae0b5858b6f5728112e208fc0e05d2 /drivers/tty | |
| parent | 6200cbaf62d481007cb07e73f67da77bc161ae96 (diff) | |
| download | linux-1d59b382f1c4111933ab56166eb520ac98676b22.tar.gz | |
serial: fsl_lpuart: add earlycon support
Add support for DT and command line based earlycon support for lpuart and lpuart32 used on Freescale Vybrid and and QorIQ LS1021A processors. Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/tty/serial/fsl_lpuart.c | 39 |
2 files changed, 40 insertions, 0 deletions
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 0667d1a51299..1aec4404062d 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -1539,6 +1539,7 @@ config SERIAL_FSL_LPUART tristate "Freescale lpuart serial port support" depends on HAS_DMA select SERIAL_CORE + select SERIAL_EARLYCON help Support for the on-chip lpuart on some Freescale SOCs. diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 08ce76f4f261..3d790033744e 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -1746,6 +1746,45 @@ static struct console lpuart32_console = { .data = &lpuart_reg, }; +static void lpuart_early_write(struct console *con, const char *s, unsigned n) +{ + struct earlycon_device *dev = con->data; + + uart_console_write(&dev->port, s, n, lpuart_console_putchar); +} + +static void lpuart32_early_write(struct console *con, const char *s, unsigned n) +{ + struct earlycon_device *dev = con->data; + + uart_console_write(&dev->port, s, n, lpuart32_console_putchar); +} + +static int __init lpuart_early_console_setup(struct earlycon_device *device, + const char *opt) +{ + if (!device->port.membase) + return -ENODEV; + + device->con->write = lpuart_early_write; + return 0; +} + +static int __init lpuart32_early_console_setup(struct earlycon_device *device, + const char *opt) +{ + if (!device->port.membase) + return -ENODEV; + + device->con->write = lpuart32_early_write; + return 0; +} + +OF_EARLYCON_DECLARE(lpuart, "fsl,vf610-lpuart", lpuart_early_console_setup); +OF_EARLYCON_DECLARE(lpuart32, "fsl,ls1021a-lpuart", lpuart32_early_console_setup); +EARLYCON_DECLARE(lpuart, lpuart_early_console_setup); +EARLYCON_DECLARE(lpuart32, lpuart32_early_console_setup); + #define LPUART_CONSOLE (&lpuart_console) #define LPUART32_CONSOLE (&lpuart32_console) #else |