What an eye opener.
Yesterday I stumbled upon some boardviews for my board, and the pro variant. That could also let me sort out the pro's serial port without one actually on hand, but that's for another time.
The power button have never blinked while in S3 like it's supposed to. I found that it is connected to GPIO27 on the PCH. I could adjust the PCH GPIO config to make it blink. What is the best approach if I want it to blink before entering S3, and stop it blinking after coming out of?
Thanks Keith
Hi Keith,
On Mon, Apr 15, 2024 at 12:49 AM Keith Hui buurin@gmail.com wrote:
What an eye opener.
Yesterday I stumbled upon some boardviews for my board, and the pro variant. That could also let me sort out the pro's serial port without one actually on hand, but that's for another time.
Nice! Serial console is always nice to have.
The power button have never blinked while in S3 like it's supposed to. I found that it is connected to GPIO27 on the PCH. I could adjust the PCH GPIO config to make it blink. What is the best approach if I want it to blink before entering S3, and stop it blinking after coming out of?
IIRC, the first 32 GPIOs of the PCH natively support a "blink" mode by setting a bit in a register. You can easily test this by enabling blink for GPIO27 in your board's `gpio.c` (this should make the power LED blink all the time). In order to make it blink only in sleep mode, you should set that "blink bit" when the board goes to sleep. In order of preference, this can be done in the DSDT (`_PTS` method; check if southbridge ACPI already has definitions for the GPIO registers) or in the SMI handler.
Thanks Keith _______________________________________________ coreboot mailing list -- coreboot@coreboot.org To unsubscribe send an email to coreboot-leave@coreboot.org
Best regards, Angel
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Angel Pons -
Keith Hui