Pass-through any options string in the 'stdout-path' property to the
earlycon "driver" setup.
Signed-off-by: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
---
drivers/of/fdt.c | 6 ++++--
drivers/tty/serial/earlycon.c | 9 +++++++--
include/linux/serial_core.h | 3 ++-
3 files changed, 13 insertions(+), 5 deletions(-)
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 89fc70c..e0b8013 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -764,7 +764,7 @@ static inline void early_init_dt_check_for_initrd(unsigned long node)
static int __init early_init_dt_scan_chosen_serial(void)
{
int offset;
- const char *p, *q;
+ const char *p, *q, *options = NULL;
int l;
const struct earlycon_id *match;
const void *fdt = initial_boot_params;
@@ -782,6 +782,8 @@ static int __init early_init_dt_scan_chosen_serial(void)
return -ENOENT;
q = strchrnul(p, ':');
+ if (*q != '\0')
+ options = q + 1;
/* Get the node specified by stdout-path */
offset = fdt_path_offset_namelen(fdt, p, (int)(q - p));
@@ -801,7 +803,7 @@ static int __init early_init_dt_scan_chosen_serial(void)
if (!addr)
return -ENXIO;
- of_setup_earlycon(addr, match);
+ of_setup_earlycon(addr, match, options);
return 0;
}
return -ENODEV;
diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c
index 1cb2864..46f39c9 100644
--- a/drivers/tty/serial/earlycon.c
+++ b/drivers/tty/serial/earlycon.c
@@ -210,7 +210,8 @@ static int __init param_setup_earlycon(char *buf)
early_param("earlycon", param_setup_earlycon);
int __init of_setup_earlycon(unsigned long addr,
- const struct earlycon_id *match)
+ const struct earlycon_id *match,
+ const char *options)
{
int err;
struct uart_port *port = &early_console_dev.port;
@@ -220,8 +221,12 @@ int __init of_setup_earlycon(unsigned long addr,
port->uartclk = BASE_BAUD * 16;
port->membase = earlycon_map(addr, SZ_4K);
+ if (options) {
+ strlcpy(early_console_dev.options, options,
+ sizeof(early_console_dev.options));
+ }
earlycon_init(&early_console_dev, match->name);
- err = match->setup(&early_console_dev, NULL);
+ err = match->setup(&early_console_dev, options);
if (err < 0)
return err;
if (!early_console_dev.con->write)
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 63662e8..3cc5e42 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -358,7 +358,8 @@ extern const struct earlycon_id __earlycon_table_end[];
#define EARLYCON_DECLARE(_name, fn) OF_EARLYCON_DECLARE(_name, "", fn)
extern int setup_earlycon(char *buf);
-extern int of_setup_earlycon(unsigned long addr, const struct earlycon_id *match);
+extern int of_setup_earlycon(unsigned long addr, const struct earlycon_id *match,
+ const char *options);
struct uart_port *uart_get_console(struct uart_port *ports, int nr,
struct console *c);
--
2.3.5
--
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