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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
..
macio
pmu: add adb_autopoll_block() and adb_autopoll_unblock() functions
2020-06-26 10:13:52 +01:00
a9scu.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
allwinner-cpucfg.c
hw/arm/allwinner: add CPU Configuration module
2020-03-12 16:27:33 +00:00
allwinner-h3-ccu.c
hw/arm/allwinner-h3: add Clock Control Unit
2020-03-12 16:27:33 +00:00
allwinner-h3-dramc.c
hw/misc/allwinner-h3-dramc: enforce 64-bit multiply when calculating row mirror address
2020-03-30 13:18:58 +01:00
allwinner-h3-sysctrl.c
hw/arm/allwinner-h3: add System Control module
2020-03-12 16:27:33 +00:00
allwinner-sid.c
hw/arm/allwinner: add Security Identifier device
2020-03-12 16:27:33 +00:00
applesmc.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
arm11scu.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
arm_integrator_debug.c
…
arm_l2x0.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
arm_sysctl.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
armsse-cpuid.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
armsse-mhu.c
…
aspeed_scu.c
aspeed: Support AST2600A1 silicon revision
2020-05-11 11:00:26 +01:00
aspeed_sdmc.c
qom: Drop parameter @errp of object_property_add() & friends
2020-05-15 07:07:58 +02:00
aspeed_xdma.c
…
auxbus.c
auxbus: Eliminate aux_create_slave()
2020-06-15 22:05:28 +02:00
bcm2835_mbox.c
hw/arm/bcm283x: Correct the license text
2020-03-23 17:22:30 +00:00
bcm2835_mphi.c
raspi: add BCM2835 SOC MPHI emulation
2020-06-05 17:23:09 +01:00
bcm2835_property.c
hw/arm/bcm283x: Correct the license text
2020-03-23 17:22:30 +00:00
bcm2835_rng.c
…
bcm2835_thermal.c
hw/misc/bcm2835_thermal: Add a dummy BCM2835 thermal sensor
2019-10-25 13:09:27 +01:00
cbus.c
…
debugexit.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
eccmemctl.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
edu.c
qom: Drop parameter @errp of object_property_add() & friends
2020-05-15 07:07:58 +02:00
empty_slot.c
sysbus: Convert to sysbus_realize() etc. with Coccinelle
2020-06-15 22:05:28 +02:00
exynos4210_clk.c
…
exynos4210_pmu.c
…
exynos4210_rng.c
…
grlib_ahb_apb_pnp.c
hw/misc/grlib_ahb_apb_pnp: Add trace events on read accesses
2020-06-09 09:21:10 +02:00
imx6_ccm.c
…
imx6_src.c
…
imx6ul_ccm.c
hw/misc/imx6ul_ccm: Implement non writable bits in CCM registers
2020-06-16 10:32:28 +01:00
imx7_ccm.c
…
imx7_gpr.c
…
imx7_snvs.c
…
imx25_ccm.c
…
imx31_ccm.c
…
imx_ccm.c
…
imx_rngc.c
i.MX: add an emulation for RNGC
2020-01-17 14:27:16 +00:00
iotkit-secctl.c
hw/misc/iotkit-secctl: Fix writing to 'PPC Interrupt Clear' register
2020-02-21 16:07:00 +00:00
iotkit-sysctl.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
iotkit-sysinfo.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
ivshmem.c
hw/misc/ivshmem: Use one Error * variable instead of two
2020-03-17 16:05:49 +01:00
Kconfig
hw/misc: Add the STM32F4xx EXTI device
2020-01-17 14:09:29 +00:00
mac_via.c
adb: only call autopoll callbacks when autopoll is not blocked
2020-06-26 10:13:52 +01:00
Makefile.objs
hw/misc/empty_slot: Move the 'hw/misc' and cover in MAINTAINERS
2020-06-09 06:59:44 +02:00
max111x.c
migration: Define VMSTATE_INSTANCE_ID_ANY
2020-01-20 09:10:23 +01:00
milkymist-hpdmc.c
…
milkymist-pfpu.c
…
mips_cmgcr.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
mips_cpc.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
mips_itu.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
mos6522.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
mps2-fpgaio.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
mps2-scc.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
msf2-sysreg.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
mst_fpga.c
…
nrf51_rng.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
omap_clk.c
…
omap_gpmc.c
…
omap_l4.c
misc: Replace zero-length arrays with flexible array member (automatic)
2020-03-16 22:07:42 +01:00
omap_sdrc.c
…
omap_tap.c
…
pc-testdev.c
Let cpu_[physical]_memory() calls pass a boolean 'is_write' argument
2020-02-20 14:47:08 +01:00
pca9552.c
hw/misc/pca9552: Trace GPIO change events
2020-06-26 14:30:28 +01:00
pci-testdev.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
puv3_pm.c
hw/unicore32/puv3: Use qemu_log_mask(ERROR) instead of debug printf()
2020-06-09 19:01:56 +02:00
pvpanic.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
sga.c
…
slavio_misc.c
…
stm32f2xx_syscfg.c
…
stm32f4xx_exti.c
hw/misc: Add the STM32F4xx EXTI device
2020-01-17 14:09:29 +00:00
stm32f4xx_syscfg.c
hw/misc/stm32f4xx_syscfg: Fix copy/paste error
2020-01-23 15:34:04 +00:00
tmp105.c
qom: Drop parameter @errp of object_property_add() & friends
2020-05-15 07:07:58 +02:00
tmp105.h
…
tmp421.c
qom: Drop parameter @errp of object_property_add() & friends
2020-05-15 07:07:58 +02:00
trace-events
hw/misc/pca9552: Trace GPIO change events
2020-06-26 14:30:28 +01:00
tz-mpc.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
tz-msc.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
tz-ppc.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
unimp.c
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
vmcoreinfo.c
hw/misc/vmcoreinfo: Add comment about reset handler
2019-10-15 18:18:08 -03:00
zynq_slcr.c
hw/misc/zynq_slcr: add clock generation for uarts
2020-04-30 15:35:41 +01:00
zynq-xadc.c
…