diff options
| author | Rob Herring <robh@kernel.org> | 2014-03-27 14:06:16 +0100 |
|---|---|---|
| committer | Rob Herring <robh@kernel.org> | 2014-05-20 22:19:25 +0200 |
| commit | b0b6abd34c1b508d4ac95dbc614f36c49d29e65a (patch) | |
| tree | 153b298e55c0ba79dc0ff1ad7f3d308f8d9ed32f /drivers/tty | |
| parent | of: consolidate linker section OF match table declarations (diff) | |
| download | linux-b0b6abd34c1b508d4ac95dbc614f36c49d29e65a.tar.xz linux-b0b6abd34c1b508d4ac95dbc614f36c49d29e65a.zip | |
serial: earlycon: add DT support
This adds the infrastructure to generic earlycon for earlycon setup
using DT. The actual setup is not enabled until a following commit to
add the FDT parsing.
Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Arnd Bergmann <arnd@arndb.de>
Acked-by: Grant Likely <grant.likely@linaro.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/earlycon.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c index c92e83088adb..5131b5ee6164 100644 --- a/drivers/tty/serial/earlycon.c +++ b/drivers/tty/serial/earlycon.c @@ -15,6 +15,8 @@ #include <linux/init.h> #include <linux/io.h> #include <linux/serial_core.h> +#include <linux/sizes.h> +#include <linux/mod_devicetable.h> #ifdef CONFIG_FIX_EARLYCON_MEM #include <asm/fixmap.h> @@ -32,6 +34,9 @@ static struct earlycon_device early_console_dev = { .con = &early_con, }; +static const struct of_device_id __earlycon_of_table_sentinel + __used __section(__earlycon_of_table_end); + static void __iomem * __init earlycon_map(unsigned long paddr, size_t size) { void __iomem *base; @@ -142,3 +147,26 @@ int __init setup_earlycon(char *buf, const char *match, register_console(early_console_dev.con); return 0; } + +int __init of_setup_earlycon(unsigned long addr, + int (*setup)(struct earlycon_device *, const char *)) +{ + int err; + struct uart_port *port = &early_console_dev.port; + + port->iotype = UPIO_MEM; + port->mapbase = addr; + port->uartclk = BASE_BAUD * 16; + port->membase = earlycon_map(addr, SZ_4K); + + early_console_dev.con->data = &early_console_dev; + err = setup(&early_console_dev, NULL); + if (err < 0) + return err; + if (!early_console_dev.con->write) + return -ENODEV; + + + register_console(early_console_dev.con); + return 0; +} |