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.
Regards, Simon