* Tony Lindgren <tony@xxxxxxxxxxx> [140815 14:10]: > * Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> [140815 10:46]: > > This patch provides a 8250-core based UART driver for the internal OMAP > > UART. The long term goal is to provide the same functionality as the > > current OMAP uart driver and DMA support. > > I tried to merge omap-serial code together with the 8250-core code. > > There should should be hardly a noticable difference. The trigger levels > > are different compared to omap-serial: > > Nice, now it mostly works for me with off-idle too :) That is as long > as I have the DMA channels commented out in the .dts file. > > And I'm still seeing an occasional hang with pstore console just > showing: > > [ 289.076538] In-band Error seen by MPU at address 0 > [ 289.076538] ------------[ cut here ]------------ > [ 289.076568] WARNING: CPU: 0 PID: 99 at drivers/bus/omap_l3_smx.c:162 omap3_l3_app_irq+0xdc/0x134() > [ 289.076599] Modules linked in: > [ 289.076599] CPU: 0 PID: 99 Comm: test-idle-off-8 Tainted: G W 3.16.0+ #510 > [ 289.076629] [<c0016c44>] (unwind_backtrace) from [<c00129c8>] (show_stack+0x20/0x24) > [ 289.076660] [<c00129c8>] (show_stack) from [<c0714cd4>] (dump_stack+0x88/0xa4) > > Which most likely means there's still some glitch with the > runtime PM somewhere and registers are being accessed when > not clocked. I _think_ I did not see it when I did not have > console=ttyS2,115200 in my cmdline but was using just pstore > console. Oh and echo mem > /sys/power/state and then hitting a key on the serial console won't wake the system. Does that need to be manually configured for device_may_wakeup()? > > The device name is ttyS based instead of ttyO. If a ttyO based node name > > is required please ask udev for it. If both driver are activated (this > > and omap-serial) then this serial driver will take control over the > > device due to the link order > > That's still not going to help with the existing kernel cmdlines > and existing installs.. I wonder if we can just do a minimal > dummy serial-omap.c that just proxies all the ttyO read/write > access to ttyS? > > Regards, > > Tony > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
