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Re: [PATCH v3 0/4] hw/misc/pca9552: Trace LED On/Off events
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From: |
Philippe Mathieu-Daudé |
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Subject: |
Re: [PATCH v3 0/4] hw/misc/pca9552: Trace LED On/Off events |
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Date: |
Sat, 20 Jun 2020 13:49:38 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 |
On 6/19/20 4:50 PM, Philippe Mathieu-Daudé wrote:
> This series add trace events to better display LEDs changes.
> This helps me to work on a generic LED device, see:
> https://www.mail-archive.com/qemu-devel@nongnu.org/msg711917.html
FYI I'm going to send a v4, using the generic LED device.
>
> Example when booting an obmc-phosphor-image, we can see the LED #14
> (front-power LED) starting to blink.
>
> - ASCII LED bar view:
>
> $ qemu-system-arm -M witherspoon-bmc -trace pca9552_leds_status
> 19286@1592574170.202791:pca9552_leds_status 0x55dde47807c0 LEDs 0-15
> [*...............]
> 19286@1592574170.203609:pca9552_leds_status 0x55dde47807c0 LEDs 0-15
> [**..............]
> 19286@1592574170.204102:pca9552_leds_status 0x55dde47807c0 LEDs 0-15
> [***.............]
> 19286@1592574170.204415:pca9552_leds_status 0x55dde47807c0 LEDs 0-15
> [****............]
> 19286@1592574170.204758:pca9552_leds_status 0x55dde47807c0 LEDs 0-15
> [****.........*..]
> 19286@1592574170.205070:pca9552_leds_status 0x55dde47807c0 LEDs 0-15
> [****.........**.]
> 19286@1592574170.205380:pca9552_leds_status 0x55dde47807c0 LEDs 0-15
> [****.........***]
> 19286@1592574235.384845:pca9552_leds_status 0x55dde47807c0 LEDs 0-15
> [****.........*.*]
> 19286@1592574235.894049:pca9552_leds_status 0x55dde47807c0 LEDs 0-15
> [****.........***]
> 19286@1592574236.404277:pca9552_leds_status 0x55dde47807c0 LEDs 0-15
> [****.........*.*]
> 19286@1592574236.914644:pca9552_leds_status 0x55dde47807c0 LEDs 0-15
> [****.........***]
> 19286@1592574237.424558:pca9552_leds_status 0x55dde47807c0 LEDs 0-15
> [****.........*.*]
> 19286@1592574237.934580:pca9552_leds_status 0x55dde47807c0 LEDs 0-15
> [****.........***]
> 19286@1592574238.444688:pca9552_leds_status 0x55dde47807c0 LEDs 0-15
> [****.........*.*]
>
> - Only display LEDs which status changes:
>
> $ qemu-system-arm -M witherspoon-bmc -trace pca9552_led_change
> 23367@1592575218.896117:pca9552_led_change 0x557cb6896d80 LED id:0 status:
> 0 -> 1
> 23367@1592575218.897072:pca9552_led_change 0x557cb6896d80 LED id:1 status:
> 0 -> 1
> 23367@1592575218.897487:pca9552_led_change 0x557cb6896d80 LED id:2 status:
> 0 -> 1
> 23367@1592575218.897855:pca9552_led_change 0x557cb6896d80 LED id:3 status:
> 0 -> 1
> 23367@1592575218.898256:pca9552_led_change 0x557cb6896d80 LED id:13 status:
> 0 -> 1
> 23367@1592575218.898663:pca9552_led_change 0x557cb6896d80 LED id:14 status:
> 0 -> 1
> 23367@1592575218.899138:pca9552_led_change 0x557cb6896d80 LED id:15 status:
> 0 -> 1
> 23367@1592575281.593379:pca9552_led_change 0x557cb6896d80 LED id:14 status:
> 1 -> 0
> 23367@1592575282.102994:pca9552_led_change 0x557cb6896d80 LED id:14 status:
> 0 -> 1
> 23367@1592575282.613558:pca9552_led_change 0x557cb6896d80 LED id:14 status:
> 1 -> 0
> 23367@1592575283.122774:pca9552_led_change 0x557cb6896d80 LED id:14 status:
> 0 -> 1
>
> For information about how to test the obmc-phosphor-image, see:
> https://www.mail-archive.com/qemu-devel@nongnu.org/msg712911.html
>
> Supersedes: <20200617064734.26956-1-f4bug@amsat.org>
>
> Philippe Mathieu-Daudé (4):
> hw/misc/pca9552: Replace magic value by PCA9552_LED_COUNT definition
> hw/misc/pca9552: Add a PCA955X_LED_MAX definition
> hw/misc/pca9552: Trace LED On/Off events
> hw/misc/pca9552: Trace LED change events
>
> include/hw/misc/pca9552.h | 2 ++
> hw/misc/pca9552.c | 60 ++++++++++++++++++++++++++++++++++++++-
> hw/misc/trace-events | 4 +++
> 3 files changed, 65 insertions(+), 1 deletion(-)
>