It may happen that the MXC serial IP block is performing some ongoing
transmission (started at e.g. board_init()) when the "initr_serial" is
called.
As a result the serial port IP block is reset, so transmitted data is
corrupted:
I2C: ready
DRAM: 1 GiB
jSS('HH��SL_SDHC: 04 rev 0x0
This patch prevents from this situation, by avoiding re-initialization of
serial IP block (and execution of the same code twice).
I2C: ready
DRAM: 1 GiB
ID: unit type 0x4 rev 0x0
This patch is a follow up of following discussions:
http://patchwork.ozlabs.org/patch/820824/
http://patchwork.ozlabs.org/patch/830957/
Signed-off-by: Lukasz Majewski <lu...@denx.de>
---
drivers/serial/serial-uclass.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/serial/serial-uclass.c b/drivers/serial/serial-uclass.c
index 2e5116f7ce..c345578b36 100644
--- a/drivers/serial/serial-uclass.c
+++ b/drivers/serial/serial-uclass.c
@@ -129,6 +129,9 @@ static void serial_find_console_or_panic(void)
/* Called prior to relocation */
int serial_init(void)
{
+ if (gd->flags & GD_FLG_SERIAL_READY)
+ return 0;
+
serial_find_console_or_panic();
gd->flags |= GD_FLG_SERIAL_READY;
--
2.11.0
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