Valdis, Thanks for quick response! On Fri, 14 Jun 2019 11:46 -07:00, Valdis Klētnieks <valdis.kletnieks@vt.edu> wrote:
On Fri, 14 Jun 2019 10:58:53 -0700, "Alexander Ivanov" said:
I have a hardware platform with Skylake i7-6500 CPU and Skylake-Y PCH southbridge, running 4.8.5 kernel fc25. The platform has 12 GPIO pins, however, none are available. gpio-pch driver does not support D31:F2 device that manages GPIO.
Am I missing something here?
Well.. my copy of drivers/gpio/gpio-pch.c has this near line 440:
static const struct pci_device_id pch_gpio_pcidev_id[] = { { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x8803) }, { PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8014) }, { PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8043) }, { PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8803) }, { 0, } }; MODULE_DEVICE_TABLE(pci, pch_gpio_pcidev_id);
Though I'm having a hard time aligning that with "D31:F2". Are you confusing a PCI address with a PCI ID, or is this on a non-PCI bus?
No, I believe I am not. This borrowed from Intel doc (https://lab.whitequark.org/files/gpioke/Intel-332690-004EN.pdf, see Ch 2) It is a PCI device with 8086/9d20 IDs. --Alex ps. I apologize, I mistyped "D31:F2" it's supposed to be D31:F1.