[PATCH] earlycon: initialise baud field of earlycon device structure

[Eugeniy Paltsev]

For now baud field of earlycon structure device is't initialised at all
in of_setup_earlycon (in oppositе to register_earlycon).

So when I use stdout-path to point earlycon device
(like stdout-path = &serial or stdout-path = "serial:115200n8")
baud field of earlycon device structure remains uninitialised and
earlycon initialization is not performed correctly as
of_setup_earlycon is used.
When pass all arguments via bootargs
(like bootargs = "earlycon=uart8250,mmio32,0xf0005000,115200n8")
initialization is performed correctly as register_earlycon is used.

So initialise baud field of earlycon device structure by baud value
from device tree or from options (if they exist) when we use
of_setup_earlycon

Signed-off-by: Eugeniy Paltsev <eugeniy.palt...@synopsys.com>
---
 drivers/tty/serial/earlycon.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c
index c365154..6c2e2b6 100644
--- a/drivers/tty/serial/earlycon.c
+++ b/drivers/tty/serial/earlycon.c
@@ -240,6 +240,7 @@ int __init of_setup_earlycon(const struct earlycon_id 
*match,
 {
        int err;
        struct uart_port *port = &early_console_dev.port;
+       unsigned long baud;
        const __be32 *val;
        bool big_endian;
        u64 addr;
@@ -282,7 +283,15 @@ int __init of_setup_earlycon(const struct earlycon_id 
*match,
                }
        }
 
+       val = of_get_flat_dt_prop(node, "baud", NULL);
+       if (val)
+               early_console_dev.baud = be32_to_cpu(*val);
+
        if (options) {
+               err = kstrtoul(options, 10, &baud);
+               if (!err)
+                       early_console_dev.baud = baud;
+
                strlcpy(early_console_dev.options, options,
                        sizeof(early_console_dev.options));
        }
-- 
2.9.3


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