summaryrefslogtreecommitdiff
path: root/Documentation/devicetree/bindings/spi/brcm,bcm2835-aux-spi.txt
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/devicetree/bindings/spi/brcm,bcm2835-aux-spi.txt')
-rw-r--r--Documentation/devicetree/bindings/spi/brcm,bcm2835-aux-spi.txt38
1 files changed, 38 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/spi/brcm,bcm2835-aux-spi.txt b/Documentation/devicetree/bindings/spi/brcm,bcm2835-aux-spi.txt
new file mode 100644
index 000000000000..9887b0724759
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/brcm,bcm2835-aux-spi.txt
@@ -0,0 +1,38 @@
+Broadcom BCM2835 auxiliar SPI1/2 controller
+
+The BCM2835 contains two forms of SPI master controller, one known simply as
+SPI0, and the other known as the "Universal SPI Master"; part of the
+auxiliary block. This binding applies to the SPI1/2 controller.
+
+Required properties:
+- compatible: Should be "brcm,bcm2835-aux-spi".
+- reg: Should contain register location and length for the spi block
+- interrupts: Should contain shared interrupt of the aux block
+- clocks: The clock feeding the SPI controller - needs to
+ point to the auxiliar clock driver of the bcm2835,
+ as this clock will enable the output gate for the specific
+ clock.
+- cs-gpios: the cs-gpios (native cs is NOT supported)
+ see also spi-bus.txt
+
+Example:
+
+spi1@7e215080 {
+ compatible = "brcm,bcm2835-aux-spi";
+ reg = <0x7e215080 0x40>;
+ interrupts = <1 29>;
+ clocks = <&aux_clocks BCM2835_AUX_CLOCK_SPI1>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ cs-gpios = <&gpio 18>, <&gpio 17>, <&gpio 16>;
+};
+
+spi2@7e2150c0 {
+ compatible = "brcm,bcm2835-aux-spi";
+ reg = <0x7e2150c0 0x40>;
+ interrupts = <1 29>;
+ clocks = <&aux_clocks BCM2835_AUX_CLOCK_SPI2>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ cs-gpios = <&gpio 43>, <&gpio 44>, <&gpio 45>;
+};