Re: [PATCH] i2c: xiic: add ACPI support

From: Michal Simek

Date: Fri Jan 16 2026 - 02:30:25 EST




On 1/15/26 20:04, Abdurrahman Hussain wrote:


On Jan 15, 2026, at 5:02 AM, Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx> wrote:

On Thu, Jan 15, 2026 at 12:28:46AM +0000, Abdurrahman Hussain wrote:
Use generic device property accessors.
Make the clock optional assuming it's managed by firmware.

Signed-off-by: Abdurrahman Hussain <abdurrahman@xxxxxxxxxx>

On which hardware has this been tested?


This was tested on nexthop.ai data-center NH-4010 switch with Xilinx based FPGA.

The following ACPI ASL fragment was used to describe the device:

Device (I2C2) {
Name (_HID, "PRP0001")
Name (_CRS, ResourceTemplate () {
Memory32Fixed (ReadWrite, 0x80a40400, 0x00000200)
GpioInt (Level, ActiveHigh, Exclusive, PullNone, 0,
"\\_SB.PCI0.GPP5.FPGA") { 10 }
})
Name (_DSD, Package () {
ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
Package () {
Package () { "compatible", "xlnx,axi-iic-2.1" },
Package () { "single-master", 1 },
}
})
}

can you share more details about cpu and bootflow?

Thanks,
Michal