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Philippe Mathieu-Daudé d82ab2931d hw/misc/pca9552: Trace GPIO change events 
Emit a trace event when a GPIO change its state.

Example booting obmc-phosphor-image:

  $ qemu-system-arm -M witherspoon-bmc -trace pca955x_gpio_change
  1592690552.687372:pca955x_gpio_change pca1 GPIO id:0 status: 0 -> 1
  1592690552.690169:pca955x_gpio_change pca1 GPIO id:1 status: 0 -> 1
  1592690552.691673:pca955x_gpio_change pca1 GPIO id:2 status: 0 -> 1
  1592690552.696886:pca955x_gpio_change pca1 GPIO id:3 status: 0 -> 1
  1592690552.698614:pca955x_gpio_change pca1 GPIO id:13 status: 0 -> 1
  1592690552.699833:pca955x_gpio_change pca1 GPIO id:14 status: 0 -> 1
  1592690552.700842:pca955x_gpio_change pca1 GPIO id:15 status: 0 -> 1
  1592690683.841921:pca955x_gpio_change pca1 GPIO id:14 status: 1 -> 0
  1592690683.861660:pca955x_gpio_change pca1 GPIO id:14 status: 0 -> 1
  1592690684.371460:pca955x_gpio_change pca1 GPIO id:14 status: 1 -> 0
  1592690684.882115:pca955x_gpio_change pca1 GPIO id:14 status: 0 -> 1
  1592690685.391411:pca955x_gpio_change pca1 GPIO id:14 status: 1 -> 0
  1592690685.901391:pca955x_gpio_change pca1 GPIO id:14 status: 0 -> 1
  1592690686.411678:pca955x_gpio_change pca1 GPIO id:14 status: 1 -> 0
  1592690686.921279:pca955x_gpio_change pca1 GPIO id:14 status: 0 -> 1

We notice the GPIO #14 (front-power LED) starts to blink.

This LED is described in the witherspoon device-tree [*]:

  front-power {
      retain-state-shutdown;
      default-state = "keep";
      gpios = <&pca0 14 GPIO_ACTIVE_LOW>;
  };

[*] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/aspeed-bmc-opp-witherspoon.dts?id=b1f9be9392f0#n140

Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Cédric Le Goater <clg@kaod.org>
Message-id: 20200623072723.6324-9-f4bug@amsat.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2020-06-26 14:30:28 +01:00
..
9pfs xen/9pfs: increase max ring order to 9 2020-05-25 11:45:40 +02:00
acpi Rename use_acpi_pci_hotplug to more appropriate use_acpi_hotplug_bridge 2020-06-24 19:03:57 -04:00
adc hw/adc/stm32f2xx_adc: Correct memory region size and access size 2020-06-05 17:23:09 +01:00
alpha sysbus: Convert to sysbus_realize() etc. with Coccinelle 2020-06-15 22:05:28 +02:00
arm hw/arm/aspeed: Describe each PCA9552 device 2020-06-26 14:30:28 +01:00
audio hw/audio/gus: Fix registers 32-bit access 2020-06-19 11:20:09 +02:00
block virtio,acpi,pci: fixes, cleanups. 2020-06-25 16:52:42 +01:00
char hw/char: RX62N serial communication interface (SCI) 2020-06-22 18:37:12 +02:00
core qdev: Make qdev_prop_set_drive() match the other helpers 2020-06-23 16:07:07 +02:00
cpu sysbus: Convert qdev_set_parent_bus() use with Coccinelle, part 3 2020-06-15 22:06:04 +02:00
cris sysbus: Convert to sysbus_realize() etc. with Coccinelle 2020-06-15 22:05:28 +02:00
display sysbus: Convert qdev_set_parent_bus() use with Coccinelle, part 3 2020-06-15 22:06:04 +02:00
dma sysbus: Convert to sysbus_realize() etc. with Coccinelle 2020-06-15 22:05:28 +02:00
gpio hw/unicore32/puv3: Use qemu_log_mask(ERROR) instead of debug printf() 2020-06-09 19:01:56 +02:00
hppa sysbus: Convert to sysbus_realize() etc. with Coccinelle 2020-06-15 22:05:28 +02:00
hyperv qdev: Convert bus-less devices to qdev_realize() with Coccinelle 2020-06-15 22:06:04 +02:00
i2c hw/i2c/core: Add i2c_try_create_slave() and i2c_realize_and_unref() 2020-06-26 14:30:28 +01:00
i386 virtio,acpi,pci: fixes, cleanups. 2020-06-25 16:52:42 +01:00
ide qdev: Make qdev_prop_set_drive() match the other helpers 2020-06-23 16:07:07 +02:00
input adb: add ADB bus trace events 2020-06-26 10:13:52 +01:00
intc hw/intc: RX62N interrupt controller (ICUa) 2020-06-22 18:37:12 +02:00
ipack qdev: Unrealize must not fail 2020-05-15 07:08:14 +02:00
ipmi various: Remove unnecessary OBJECT() cast 2020-05-15 07:08:14 +02:00
isa fdc: Reject clash between -drive if=floppy and -global isa-fdc 2020-06-23 16:07:07 +02:00
lm32 sysbus: Convert to sysbus_realize() etc. with Coccinelle 2020-06-15 22:05:28 +02:00
m68k qdev: Make qdev_prop_set_drive() match the other helpers 2020-06-23 16:07:07 +02:00
mem nvdimm: Plug memory leak in uuid property setter 2020-05-27 07:44:59 +02:00
microblaze qdev: Make qdev_prop_set_drive() match the other helpers 2020-06-23 16:07:07 +02:00
mips sysbus: Convert qdev_set_parent_bus() use with Coccinelle, part 1 2020-06-15 22:06:04 +02:00
misc hw/misc/pca9552: Trace GPIO change events 2020-06-26 14:30:28 +01:00
moxie hw: Make MachineClass::is_default a boolean type 2020-02-28 14:57:19 -05:00
net hw/net/e1000e: Do not abort() on invalid PSRCTL register value 2020-06-18 21:05:52 +08:00
nios2 sysbus: Convert to sysbus_realize() etc. with Coccinelle 2020-06-15 22:05:28 +02:00
nubus hw: Remove unnecessary DEVICE() cast 2020-05-15 07:08:52 +02:00
nvram sysbus: Convert to sysbus_realize() etc. with Coccinelle 2020-06-15 22:05:28 +02:00
openrisc sysbus: Convert to sysbus_realize() etc. with Coccinelle 2020-06-15 22:05:28 +02:00
pci pci: pci_create(), pci_create_multifunction() are now unused, drop 2020-06-15 22:05:28 +02:00
pci-bridge sysbus: Convert to sysbus_realize() etc. with Coccinelle 2020-06-15 22:05:28 +02:00
pci-host qdev: Convert bus-less devices to qdev_realize() with Coccinelle 2020-06-15 22:06:04 +02:00
pcmcia sysbus: Convert to sysbus_realize() etc. with Coccinelle 2020-06-15 22:05:28 +02:00
ppc qemu-macppc patches 2020-06-26 12:14:18 +01:00
rdma lockable: Replace locks with lock guard macros 2020-05-04 16:07:43 +01:00
riscv hw/riscv: sifive_u: Add a dummy DDR memory controller device 2020-06-19 08:25:27 -07:00
rtc sysbus: Convert to sysbus_realize() etc. with Coccinelle 2020-06-15 22:05:28 +02:00
rx hw/rx: Add RX GDB simulator 2020-06-22 18:37:12 +02:00
s390x s390x/css: Refactor the css_queue_crw() routine 2020-06-18 12:13:54 +02:00
scsi qdev: Make qdev_prop_set_drive() match the other helpers 2020-06-23 16:07:07 +02:00
sd sd/milkymist-memcard: Fix error API violation 2020-06-23 16:07:21 +02:00
semihosting semihosting: remove the pthread include which seems unused 2020-06-10 11:29:44 +02:00
sh4 hw/sh4: Extract timer definitions to 'hw/timer/tmu012.h' 2020-06-22 18:37:12 +02:00
smbios hw/smbios/smbios: Remove unused include 2020-02-06 10:38:57 +01:00
sparc sysbus: Convert to sysbus_realize() etc. with Coccinelle 2020-06-15 22:05:28 +02:00
sparc64 fdc: Reject clash between -drive if=floppy and -global isa-fdc 2020-06-23 16:07:07 +02:00
ssi ssi: ssi_create_slave_no_init() is now unused, drop 2020-06-15 22:05:28 +02:00
timer hw/timer: RX62N compare match timer (CMT) 2020-06-22 18:37:12 +02:00
tpm tpm: Move backend code under the 'backends/' directory 2020-06-19 07:25:55 -04:00
tricore hw: Do not initialize MachineClass::is_default to 0 2020-02-28 14:57:19 -05:00
unicore32 hw/unicore32/puv3: Use qemu_log_mask(ERROR) instead of debug printf() 2020-06-09 19:01:56 +02:00
usb Block layer patches: 2020-06-18 12:15:33 +01:00
vfio vfio-ccw: Add support for the CRW region and IRQ 2020-06-18 12:13:54 +02:00
virtio Stop vhost-user sending uninitialized mmap_offsets 2020-06-24 17:18:28 -04:00
watchdog hw/watchdog/cmsdk-apb-watchdog: Add trace event for lock status 2020-06-23 11:39:47 +01:00
xen sysbus: Convert to sysbus_realize() etc. with Coccinelle 2020-06-15 22:05:28 +02:00
xenpv trivial: Remove xenfb_enabled from sysemu.h 2020-02-04 09:00:57 +01:00
xtensa qdev: Make qdev_prop_set_drive() match the other helpers 2020-06-23 16:07:07 +02:00
Kconfig hw/rx: RX62N microcontroller (MCU) 2020-06-22 18:37:12 +02:00
Makefile.objs xen: fix build without pci passthrough 2020-06-12 11:20:12 -04:00