Re: GPIO Driver for Skylake-Y PCH

["Alexander Ivanov" <amivanov@xxxxxxxxxxxx>]

Valdis,

Thanks for quick response!

On Fri, 14 Jun 2019 11:46 -07:00, Valdis Klētnieks <valdis.kletnieks@xxxxxx> 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.

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