318324e6df
The devctl register on musb is the only way to get state information on musb. The hardware can easily get confused because it tries to do things on it's own automagically, and things like slow VBUS rise can make things fail. Let's make it easier to debug the ongoing state change issues that keep popping up on regular basis and add tracing support. With these changes we can easily trace musb state change events with: echo 1 > /sys/kernel/debug/tracing/events/musb/musb_state/enable cat /sys/kernel/debug/tracing/trace_pipe echo 0 > /sys/kernel/debug/tracing/events/musb/musb_state/enable Cc: Alexandre Belloni <alexandre.belloni@bootlin.com> Cc: Andreas Kemnade <andreas@kemnade.info> Cc: Bhushan Shah <bshah@kde.org> Cc: Drew Fustini <drew@beagleboard.org> Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Link: https://lore.kernel.org/r/20210604080536.12185-2-tony@atomide.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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| .. | ||
| Kconfig | ||
| Makefile | ||
| am35x.c | ||
| cppi_dma.c | ||
| cppi_dma.h | ||
| da8xx.c | ||
| davinci.c | ||
| davinci.h | ||
| jz4740.c | ||
| mediatek.c | ||
| musb_core.c | ||
| musb_core.h | ||
| musb_cppi41.c | ||
| musb_debug.h | ||
| musb_debugfs.c | ||
| musb_dma.h | ||
| musb_dsps.c | ||
| musb_gadget.c | ||
| musb_gadget.h | ||
| musb_gadget_ep0.c | ||
| musb_host.c | ||
| musb_host.h | ||
| musb_io.h | ||
| musb_regs.h | ||
| musb_trace.c | ||
| musb_trace.h | ||
| musb_virthub.c | ||
| musbhsdma.c | ||
| omap2430.c | ||
| omap2430.h | ||
| sunxi.c | ||
| tusb6010.c | ||
| tusb6010.h | ||
| tusb6010_omap.c | ||
| ux500.c | ||
| ux500_dma.c | ||