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authorJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>2012-11-23 13:44:39 +0100
committerGrant Likely <grant.likely@secretlab.ca>2012-12-17 17:11:32 +0000
commit850a5b670af6293fcb1852af57567d19150ff638 (patch)
tree929a247a47c6c4e58dcf77e5ca4b5490e46e0646 /Documentation
parentcb71941a682270dd5164d1332900694d19caa5e1 (diff)
downloadvexpress-lsk-850a5b670af6293fcb1852af57567d19150ff638.tar.gz
spi/atmel: add DT support
Use the newly introduce cs-gpios dt support on atmel. We do not use the hardware cs as it's wired and has bugs and limitations. As the controller believes that only active-low devices/systems exists. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/spi/spi_atmel.txt26
1 files changed, 26 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/spi/spi_atmel.txt b/Documentation/devicetree/bindings/spi/spi_atmel.txt
new file mode 100644
index 00000000000..07e04cdc0c9
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/spi_atmel.txt
@@ -0,0 +1,26 @@
+Atmel SPI device
+
+Required properties:
+- compatible : should be "atmel,at91rm9200-spi".
+- reg: Address and length of the register set for the device
+- interrupts: Should contain spi interrupt
+- cs-gpios: chipselects
+
+Example:
+
+spi1: spi@fffcc000 {
+ compatible = "atmel,at91rm9200-spi";
+ reg = <0xfffcc000 0x4000>;
+ interrupts = <13 4 5>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ cs-gpios = <&pioB 3 0>;
+ status = "okay";
+
+ mmc-slot@0 {
+ compatible = "mmc-spi-slot";
+ reg = <0>;
+ gpios = <&pioC 4 0>; /* CD */
+ spi-max-frequency = <25000000>;
+ };
+};