|author||Laxman Dewangan <firstname.lastname@example.org>||2013-02-22 18:07:39 +0530|
|committer||Grant Likely <email@example.com>||2013-04-07 10:08:00 +0100|
spi/tegra114: add spi driver
Add SPI driver for NVIDIA's Tegra114 SPI controller. This controller is different than the older SoCs SPI controller in internal design as well as register interface. This driver supports the: - non DMA based transfer for smaller transfer i.e. less than FIFO depth. - APB DMA based transfer for larger transfer i.e. more than FIFO depth. - Clock gating through runtime PM callbacks. - registration through DT only. Signed-off-by: Laxman Dewangan <firstname.lastname@example.org> Reviewed-by: Stephen Warren <email@example.com> Signed-off-by: Grant Likely <firstname.lastname@example.org>
Diffstat (limited to 'Documentation/devicetree')
1 files changed, 26 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/spi/nvidia,tegra114-spi.txt b/Documentation/devicetree/bindings/spi/nvidia,tegra114-spi.txt
new file mode 100644
@@ -0,0 +1,26 @@
+NVIDIA Tegra114 SPI controller.
+- compatible : should be "nvidia,tegra114-spi".
+- reg: Should contain SPI registers location and length.
+- interrupts: Should contain SPI interrupts.
+- nvidia,dma-request-selector : The Tegra DMA controller's phandle and
+ request selector for this SPI controller.
+- This is also require clock named "spi" as per binding document
+- spi-max-frequency: Definition as per
+ compatible = "nvidia,tegra114-spi";
+ reg = <0x7000d600 0x200>;
+ interrupts = <0 82 0x04>;
+ nvidia,dma-request-selector = <&apbdma 16>;
+ spi-max-frequency = <25000000>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "disabled";