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| author | Philippe Mathieu-Daudé <f4bug@amsat.org> | 2020-06-23 09:27:20 +0200 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2020-06-26 14:30:28 +0100 |
| commit | b989b89f672597cc0e780b5ce95e604d4f49247a (patch) | |
| tree | e332f21c0dfa097b3a5202cfe8e09941479e37dc /hw/xtensa | |
| parent | 2df252d8793097386d4972640653da93f7857da1 (diff) | |
| download | qemu-b989b89f672597cc0e780b5ce95e604d4f49247a.zip qemu-b989b89f672597cc0e780b5ce95e604d4f49247a.tar.gz qemu-b989b89f672597cc0e780b5ce95e604d4f49247a.tar.bz2 | |
hw/misc/pca9552: Trace GPIO High/Low events
Add a trivial representation of the PCA9552 GPIOs.
Example booting obmc-phosphor-image:
$ qemu-system-arm -M witherspoon-bmc -trace pca955x_gpio_status
1592689902.327837:pca955x_gpio_status pca-unspecified GPIOs 0-15 [*...............]
1592689902.329934:pca955x_gpio_status pca-unspecified GPIOs 0-15 [**..............]
1592689902.330717:pca955x_gpio_status pca-unspecified GPIOs 0-15 [***.............]
1592689902.331431:pca955x_gpio_status pca-unspecified GPIOs 0-15 [****............]
1592689902.332163:pca955x_gpio_status pca-unspecified GPIOs 0-15 [****.........*..]
1592689902.332888:pca955x_gpio_status pca-unspecified GPIOs 0-15 [****.........**.]
1592689902.333629:pca955x_gpio_status pca-unspecified GPIOs 0-15 [****.........***]
1592690032.793289:pca955x_gpio_status pca-unspecified GPIOs 0-15 [****.........*.*]
1592690033.303163:pca955x_gpio_status pca-unspecified GPIOs 0-15 [****.........***]
1592690033.812962:pca955x_gpio_status pca-unspecified GPIOs 0-15 [****.........*.*]
1592690034.323234:pca955x_gpio_status pca-unspecified GPIOs 0-15 [****.........***]
1592690034.832922:pca955x_gpio_status pca-unspecified GPIOs 0-15 [****.........*.*]
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
Suggested-by: Cédric Le Goater <clg@kaod.org>
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: 20200623072723.6324-7-f4bug@amsat.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw/xtensa')
0 files changed, 0 insertions, 0 deletions