Hi Simon,
Hi Lukasz,
On 3 October 2017 at 03:16, Lukasz Majewski lukma@denx.de wrote:
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 waiting for transmission complete bit set (UART Status Register 2 (UARTx_USR2), bit TXDC):
I2C: ready DRAM: 1 GiB ID: unit type 0x4 rev 0x0
Signed-off-by: Lukasz Majewski lukma@denx.de
drivers/serial/serial_mxc.c | 7 +++++++ 1 file changed, 7 insertions(+)
Is it possible to use driver model to do this in a generic way for all serial drivers? The pending() method allows you to check if there are any characters in the output FIFO.
Please correct me if I'm wrong.
Do you mean to define pre_init() callback in serial-uclass.c file, which would utilize ->pending callback if available?
In that way we would have the generic facility for above check available on all platforms.
Regards, Simon