summaryrefslogtreecommitdiff
path: root/src/drivers/i2c/gpiomux/bus
AgeCommit message (Collapse)Author
2020-11-09acpi: Call acpi_fill_ssdt() only for enabled devicesKarthikeyan Ramasubramanian
Individual drivers check whether the concerned device is enabled before filling in the SSDT. Move the check before calling acpi_fill_ssdt() and remove the check in the individual drivers. BUG=None TEST=util/abuild/abuild Change-Id: Ib042bec7e8c68b38fafa60a8e965d781bddcd1f0 Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/47148 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Furquan Shaikh <furquan@google.com> Reviewed-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com> Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Christian Walter <christian.walter@9elements.com>
2020-10-19drivers/i2c/gpiomux: Add chip driver for multiplexed I2C busKarthikeyan Ramasubramanian
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 <kramasub@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/46144 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Furquan Shaikh <furquan@google.com>