[coreboot-gerrit] Change in coreboot[master]: drivers/spi/acpi: Support power resource as parent in device tree

[Tim Wawrzynczak (Code Review)]

Hello Aaron Durbin, Patrick Rudolph, Julius Werner, Subrata Banik, Duncan Laurie, Paul Menzel, build bot (Jenkins), Nico Huber, Patrick Georgi, Martin Roth, Furquan Shaikh,

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

https://review.coreboot.org/c/coreboot/+/35076

to look at the new patch set (#5).

Change subject: drivers/spi/acpi: Support power resource as parent in device tree
......................................................................

drivers/spi/acpi: Support power resource as parent in device tree

This allows supporting an independent power resource for SPI ACPI
devices, so that the power resource configuration can be refactored
out of individual drivers and coalesced into a separate one.

device pci 00.0 on
        chip drivers/spi/acpi
                register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPIO0)"
                register "reset_enable_delay_ms" = "100"
                ...
                device spi 1 on end
        end

chip drivers/spi/acpi
                register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPIO0)"
                register "reset_enable_delay_ms" = "2"
                ...
                device spi 2 on end
        end
end

You can then write:

device pci 00.0 on
        chip drivers/generic/power_resource
                register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPIO0)"
                register "reset_enable_delay_ms" = "100"
                device generic 0 on
                        chip drivers/spi/acpi
                                register ...
                                device spi 1 on end
                        end
                        chip drivers/spi/acpi
                                register ...
                                device spi 2 on end
                        end
                end
        end
end

Change-Id: Ib1e52a0f31d430637c9d819e231f9c4af6c68672
Signed-off-by: Tim Wawrzynczak 
---
M src/drivers/spi/acpi/acpi.c
1 file changed, 20 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/76/35076/5