Hi Kevin, On Wed, Oct 1, 2014 at 10:57 PM, Kevin Hilman <khilman@xxxxxxxxxx> wrote: > On Sun, Sep 21, 2014 at 11:30 PM, Sudhir Sreedharan > <ssreedharan@xxxxxxxxxx> wrote: >> For console devices having UART_CAP_SLEEP capability, the uart_pm_state has >> to be initialized to UART_PM_STATE_ON. Otherwise the LCR regiser values >> are reinitialized when uart_change_pm is called from uart_configure_port. >> >> Signed-off-by: Sudhir Sreedharan <ssreedharan@xxxxxxxxxx> > > Multiple boot failures on ARM[1] were bisected down to this patch. > > How was this patch tested, and on which platforms? This patch was tested on x86-64(haswell) board, which uses ST16650V2 uart(which has UART_CAP_SLEEP). While serial driver gets initialized, console port LCR register is getting reinitalized to 0. Then boot logs will be seen as garbage characters. I will re-check why this failed on the boards/archs you mentioned. Thanks, Sudhir -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
