[coreboot-gerrit] Change in coreboot[master]: drivers/i2c/gpiomux: Add chip driver for multiplexed I2C bus

[Karthik Ramasubramanian (Code Review)]

Hello build bot (Jenkins), Patrick Georgi, Martin Roth,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/46144

to look at the new patch set (#2).

Change subject: drivers/i2c/gpiomux: Add chip driver for multiplexed I2C bus
......................................................................

drivers/i2c/gpiomux: Add chip driver for multiplexed I2C bus

This chip driver adds ACPI identifiers for multiplexed I2C bus that are
selected using GPIO. The multiplexed bus device defines the address
to select the I2C lines. These ACPI identifiers are consumed by the
i2c-mux-gpio kernel driver:
https://www.kernel.org/doc/html/latest/i2c/muxes/i2c-mux-gpio.html

BUG=b:169444894
TEST=Build and boot to OS in waddledee. Ensure that the ACPI identifiers
are added in appropriate context.
Scope (_SB.PCI0.I2C3.MUX0)
{
    Device (MXA0)
    {
        Method (_STA, 0, NotSerialized)  // _STA: Status
        {
            Return (0x0F)
        }

Name (_ADR, Zero)  // _ADR: Address
    }
}

Scope (_SB.PCI0.I2C3.MUX0)
{
    Device (MXA1)
    {
        Method (_STA, 0, NotSerialized)  // _STA: Status
        {
            Return (0x0F)
        }

Name (_ADR, One)  // _ADR: Address
    }
}

Change-Id: If8b983bc8ce212ce05fe6b7f01a6d9092468e582
Signed-off-by: Karthikeyan Ramasubramanian 
---
M src/drivers/i2c/gpiomux/Makefile.inc
A src/drivers/i2c/gpiomux/bus/Makefile.inc
A src/drivers/i2c/gpiomux/bus/bus.c
A src/drivers/i2c/gpiomux/bus/chip.h
4 files changed, 78 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/44/46144/2