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Tony Lindgren 318324e6df usb: musb: Implement tracing for state change events 
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>
2021-06-14 10:25:16 +02:00
..
accessibility TTY/Serial driver updates for 5.13-rc1 2021-04-26 11:20:10 -07:00
acpi Merge branch 'acpi-bus' 2021-06-11 17:57:24 +02:00
amba
android binder: Return EFAULT if we fail BINDER_ENABLE_ONEWAY_SPAM_DETECTION 2021-05-13 20:35:26 +02:00
ata pci-v5.13-changes 2021-05-05 13:24:11 -07:00
atm atm: firestream: Use fallthrough pseudo-keyword 2021-05-07 16:01:08 -07:00
auxdisplay treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
base Linux 5.13-rc6 2021-06-14 09:18:07 +02:00
bcma bcma: remove unused function 2021-04-18 09:36:56 +03:00
block block-5.13-2021-06-12 2021-06-12 11:59:58 -07:00
bluetooth Networking fixes for 5.13-rc5, including fixes from bpf, wireless, 2021-06-04 18:25:39 -07:00
bus Char/Misc driver fixes for 5.13-rc6 2021-06-12 12:13:55 -07:00
cdrom cdrom: gdrom: initialize global variable at init time 2021-05-13 18:58:44 +02:00
char Char/misc driver fixes for 5.13-rc3 2021-05-20 06:31:52 -10:00
clk clk: Skip clk provider registration when np is NULL 2021-05-11 08:47:25 +02:00
clocksource clocksource/drivers/hyper-v: Re-enable VDSO_CLOCKMODE_HVCLOCK on X86 2021-05-14 14:55:13 +02:00
comedi staging: comedi: move out of staging directory 2021-04-15 09:26:25 +02:00
connector
counter
cpufreq Fix an idle CPU selection bug, and an AMD Ryzen maximum frequency enumeration bug. 2021-05-15 10:24:48 -07:00
cpuidle Merge back earlier cpuidle updates for v5.13. 2021-04-08 20:05:49 +02:00
crypto Revert "crypto: cavium/nitrox - add an error message to explain the failure of pci_request_mem_regions" 2021-05-13 17:23:05 +02:00
cxl cxl/mem: Fix memory device capacity probing 2021-04-16 18:21:56 -07:00
dax
dca
devfreq
dio
dma dmaengine: idxd: Use cpu_feature_enabled() 2021-06-03 16:32:59 +02:00
dma-buf dma-buf: fix unintended pin/unpin warnings 2021-05-20 14:02:27 +02:00
edac x86/msr: Rename MSR_K8_SYSCFG to MSR_AMD64_SYSCFG 2021-05-10 07:51:38 +02:00
eisa
extcon - Core Frameworks 2021-04-28 15:59:13 -07:00
firewire The usual updates from the irq departement: 2021-04-26 09:43:16 -07:00
firmware EFI fixes for v5.13-rc 2021-05-23 11:39:02 +02:00
fpga ARM: SoC drivers for v5.13 2021-04-26 12:11:52 -07:00
fsi
gnss
gpio gpio: wcd934x: Fix shift-out-of-bounds error 2021-05-27 09:51:35 +02:00
gpu Merge tag 'amd-drm-fixes-5.13-2021-06-09' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes 2021-06-11 11:17:10 +10:00
greybus greybus: es2: fix kernel-doc warnings 2021-04-16 07:26:50 +02:00
hid HID: asus: Cleanup Asus T101HA keyboard-dock handling 2021-05-27 15:40:35 +02:00
hsi HSI: core: fix resource leaks in hsi_add_client_from_dt() 2021-04-16 00:14:49 +02:00
hv printk changes for 5.13 2021-04-27 18:09:44 -07:00
hwmon hwmon: (tps23861) correct shunt LSB values 2021-06-10 08:40:09 -07:00
hwspinlock
hwtracing ARM: 2021-05-01 10:14:08 -07:00
i2c i2c: qcom-geni: Suspend and resume the bus during SYSTEM_SLEEP_PM ops 2021-06-04 22:32:58 +02:00
i3c Revert "i3c master: fix missing destroy_workqueue() on error in i3c_master_register" 2021-04-24 22:21:01 +02:00
ide
idle intel_idle: add Iclelake-D support 2021-04-08 19:18:07 +02:00
iio iio: adc: ad7793: Add missing error code in ad7793_setup() 2021-05-22 08:32:36 +01:00
infiniband IB/mlx5: Fix initializing CQ fragments buffer 2021-06-10 08:59:34 -03:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2021-05-06 23:37:55 -07:00
interconnect interconnect: qcom: Add missing MODULE_DEVICE_TABLE 2021-05-11 07:26:31 +03:00
iommu iommu/vt-d: Fix sysfs leak in alloc_iommu() 2021-05-27 16:07:08 +02:00
ipack
irqchip irqchip: Remove redundant error printing 2021-05-16 13:07:18 +01:00
isdn Networking fixes for 5.13-rc4, including fixes from bpf, netfilter, 2021-05-26 17:44:49 -10:00
leds leds: lp5523: check return value of lp5xx_read and jump to cleanup code 2021-05-13 17:30:15 +02:00
lightnvm lightnvm: deprecated OCSSD support and schedule it for removal in Linux 5.15 2021-04-13 09:16:12 -06:00
macintosh macintosh/via-pmu: Fix build warning 2021-04-16 23:57:51 +10:00
mailbox - qcom: enable support for SM8350 and SC7280 2021-04-28 16:10:33 -07:00
mcb
md block-5.13-2021-06-12 2021-06-12 11:59:58 -07:00
media media: gspca: properly check for errors in po1030_probe() 2021-05-13 18:58:32 +02:00
memory .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
memstick memstick: r592: ignore kfifo_out() return code again 2021-04-26 11:08:23 +02:00
message scsi: message: fusion: Remove unused local variable 'vtarget' 2021-04-13 01:39:12 -04:00
mfd - Core Frameworks 2021-04-28 15:59:13 -07:00
misc misc: rtsx: separate aspm mode into MODE_REG and MODE_CFG 2021-06-09 19:10:22 +02:00
mmc mmc: renesas_sdhi: Fix HS400 on R-Car M3-W+ 2021-06-08 14:56:54 +02:00
most Staging/IIO driver updates for 5.13-rc1 2021-04-26 11:14:21 -07:00
mtd mtd: parsers: ofpart: fix parsing subpartitions 2021-05-10 18:34:30 +02:00
mux
net RDMA second v5.13 rc Pull Request 2021-06-10 10:53:04 -07:00
nfc NFC: nfcmrvl: fix kernel-doc syntax in file headers 2021-05-23 17:26:38 -07:00
ntb
nubus
nvdimm include: remove pagemap.h from blkdev.h 2021-05-06 19:24:11 -07:00
nvme nvmet: fix freeing unallocated p2pmem 2021-06-02 10:10:38 +03:00
nvmem
of of: overlay: Remove redundant assignment to ret 2021-05-03 13:57:56 -05:00
opp
parisc
parport treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
pci Linux 5.13-rc6 2021-06-14 09:18:07 +02:00
pcmcia
perf ARM: 2021-05-01 10:14:08 -07:00
phy phy: Sparx5 Eth SerDes: check return value after calling platform_get_resource() 2021-06-03 11:18:19 +05:30
pinctrl pinctrl: qcom: Make it possible to select SC8180x TLMM 2021-06-09 13:15:20 +02:00
platform platform/mellanox: mlxreg-hotplug: Revert "move to use request_irq by IRQF_NO_AUTOEN flag" 2021-06-04 22:03:13 +02:00
pnp
power power supply and reset changes for the v5.13 series 2021-04-28 15:43:58 -07:00
powercap
pps TTY/Serial driver updates for 5.13-rc1 2021-04-26 11:20:10 -07:00
ps3
ptp ptp: ocp: Fix a resource leak in an error handling path 2021-05-12 14:06:33 -07:00
pwm pwm: Changes for v5.13-rc1 2021-05-05 12:53:16 -07:00
rapidio rapidio: handle create_workqueue() failure 2021-05-13 18:32:19 +02:00
ras
regulator regulator: Fixes for v5.14 2021-06-08 09:41:16 -07:00
remoteproc remoteproc updates for v5.13 2021-05-04 11:13:33 -07:00
reset pci-v5.13-changes 2021-05-05 13:24:11 -07:00
rpmsg rpmsg: qcom_glink_native: fix error return code of qcom_glink_rx_data() 2021-04-09 11:08:42 -05:00
rtc RTC for 5.13 2021-05-03 12:15:21 -07:00
s390 - Fix races in vfio-ccw request handling. 2021-05-29 05:51:53 -10:00
sbus
scsi SCSI fixes on 20210613 2021-06-13 12:25:33 -07:00
sh The usual updates from the irq departement: 2021-04-26 09:43:16 -07:00
siox
slimbus
soc soc: amlogic: meson-clk-measure: remove redundant dev_err call in meson_msr_probe() 2021-05-31 09:26:58 +02:00
soundwire soundwire: qcom: fix handling of qcom,ports-block-pack-mode 2021-05-13 11:14:13 +05:30
spi spi: stm32-qspi: Always wait BUSY bit to be cleared in stm32_qspi_wait_cmd() 2021-06-03 13:55:36 +01:00
spmi
ssb
staging staging: ralink-gdma: Remove incorrect author information 2021-06-09 12:07:52 +02:00
target scsi: target: core: Fix warning on realtime kernels 2021-05-31 22:59:13 -04:00
tc
tee OP-TEE use export_uuid() to copy UUID 2021-06-05 15:43:11 -07:00
thermal - Fix out-of-spec hardware (1st gen Hygon) which does not implement 2021-06-06 12:25:43 -07:00
thunderbolt thunderbolt: usb4: Fix NVM read buffer bounds and offset issue 2021-05-20 11:52:58 +03:00
tty serial: 8250_exar: Avoid NULL pointer dereference at ->exit() 2021-06-09 14:40:48 +02:00
uio uio_hv_generic: Fix another memory leak in error handling paths 2021-05-14 13:26:04 +02:00
usb usb: musb: Implement tracing for state change events 2021-06-14 10:25:16 +02:00
vdpa {net,vdpa}/mlx5: Configure interface MAC into mpfs L2 table 2021-05-18 23:01:48 -07:00
vfio vfio/platform: fix module_put call in error flow 2021-05-24 13:40:13 -06:00
vhost virtio,vhost,vdpa: features, fixes 2021-05-05 13:31:39 -07:00
video Revert "fb_defio: Remove custom address_space_operations" 2021-06-01 17:38:40 +02:00
virt nitro_enclaves: Fix stale file descriptors on failed usercopy 2021-04-29 19:06:49 +02:00
virtio virtio_pci_modern: correct sparse tags for notify 2021-05-04 04:19:59 -04:00
visorbus
vlynq
vme
w1 w1: ds28e17: Use module_w1_family to simplify the code 2021-04-10 10:58:21 +02:00
watchdog - Core Frameworks 2021-04-28 15:59:13 -07:00
xen xen-pciback: reconfigure also from backend watch handler 2021-05-21 09:55:16 +02:00
zorro
Kconfig staging: comedi: move out of staging directory 2021-04-15 09:26:25 +02:00
Makefile virtio,vhost,vdpa: features, fixes 2021-05-05 13:31:39 -07:00