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Message-Id: <1452986629-17210-6-git-send-email-peter@hurleysoftware.com>
Date: Sat, 16 Jan 2016 15:23:42 -0800
From: Peter Hurley <peter@...leysoftware.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Rob Herring <robh@...nel.org>,
Grant Likely <grant.likely@...aro.org>
Cc: Jiri Slaby <jslaby@...e.cz>, linux-serial@...r.kernel.org,
linux-kernel@...r.kernel.org, Kevin Cernekee <cernekee@...il.com>,
Jon Hunter <jonathanh@...dia.com>,
Paul Burton <paul.burton@...tec.com>,
Masahiro Yamada <yamada.masahiro@...ionext.com>,
Sebastian Frias <sf84@...oste.net>,
Peter Hurley <peter@...leysoftware.com>
Subject: [PATCH v6 05/12] of: earlycon: Add options string handling
Pass-through any options string in the 'stdout-path' property to the
earlycon "driver" setup.
Acked-by: Rob Herring <robh@...nel.org>
Signed-off-by: Peter Hurley <peter@...leysoftware.com>
---
drivers/of/fdt.c | 11 ++++++-----
drivers/tty/serial/earlycon.c | 9 +++++++--
include/linux/serial_core.h | 3 ++-
3 files changed, 15 insertions(+), 8 deletions(-)
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index ec14595..cfd3b35 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -800,7 +800,7 @@ 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;
+ const char *p, *q, *options = NULL;
int l;
const struct earlycon_id *match;
const void *fdt = initial_boot_params;
@@ -817,11 +817,12 @@ static int __init early_init_dt_scan_chosen_serial(void)
if (!p || !l)
return -ENOENT;
- /* Remove console options if present */
- l = strchrnul(p, ':') - p;
+ q = strchrnul(p, ':');
+ if (*q != '\0')
+ options = q + 1;
/* Get the node specified by stdout-path */
- offset = fdt_path_offset_namelen(fdt, p, l);
+ offset = fdt_path_offset_namelen(fdt, p, q - p);
if (offset < 0)
return -ENODEV;
@@ -838,7 +839,7 @@ static int __init early_init_dt_scan_chosen_serial(void)
if (addr == OF_BAD_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 47e54de..7509ee34d 100644
--- a/drivers/tty/serial/earlycon.c
+++ b/drivers/tty/serial/earlycon.c
@@ -218,7 +218,8 @@ early_param("earlycon", param_setup_earlycon);
#ifdef CONFIG_OF_EARLY_FLATTREE
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;
@@ -229,8 +230,12 @@ 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 63fdb55..62a4df0 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -359,7 +359,8 @@ 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);
--
2.7.0
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