device: Add a new "SPI" device type
Add support for a new "SPI" device type in the devicetree to bind a
device on the SPI bus. Allow device to provide chip select number for
the device as a parameter.
Add spi_bus_operations with operation dev_to_bus which allows SoCs to
define a translation method for converting "struct device" into a unique
SPI bus number.
BUG=chrome-os-partner:59832
BRANCH=None
TEST=Compiles successfully.
Change-Id: I86f09516d3cddd619fef23a4659c9e4eadbcf3fa
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/18340
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Tested-by: build bot (Jenkins)
diff --git a/src/include/device/path.h b/src/include/device/path.h
index 9d7fb38..849b579 100644
--- a/src/include/device/path.h
+++ b/src/include/device/path.h
@@ -14,6 +14,7 @@
DEVICE_PATH_CPU_BUS,
DEVICE_PATH_IOAPIC,
DEVICE_PATH_GENERIC,
+ DEVICE_PATH_SPI,
/*
* When adding path types to this table, please also update the
@@ -33,7 +34,8 @@
"DEVICE_PATH_CPU", \
"DEVICE_PATH_CPU_BUS", \
"DEVICE_PATH_IOAPIC", \
- "DEVICE_PATH_GENERIC" \
+ "DEVICE_PATH_GENERIC", \
+ "DEVICE_PATH_SPI", \
}
struct domain_path
@@ -58,6 +60,11 @@
unsigned mode_10bit;
};
+struct spi_path
+{
+ unsigned cs;
+};
+
struct apic_path
{
unsigned apic_id;
@@ -107,6 +114,7 @@
struct cpu_path cpu;
struct cpu_bus_path cpu_bus;
struct generic_path generic;
+ struct spi_path spi;
};
};