Hi Lucasz, On 9 October 2017 at 12:46, Łukasz Majewski <lu...@denx.de> wrote: > Hi Simon, > >> Hi Lukasz, >> >> On 3 October 2017 at 03:16, Lukasz Majewski <lu...@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 <lu...@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.
Yes that is what I am hoping. Regards, Simon _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot