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authorAnton Arapov <anton@redhat.com>2012-10-29 11:15:37 +0100
committerAnton Arapov <anton@redhat.com>2012-10-29 11:15:37 +0100
commit7d558cd9c7b18e4b16953265aa0da45e63f3b968 (patch)
tree7135d5a810768c9c619346282ee9cfdf1765e225 /Documentation/devicetree/bindings/spi
parent985ef6b2108ed28ffd5f6630e1e0fce2e2a775f2 (diff)
downloadkernel-uprobes-f17.tar.gz
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kernel-uprobes-f17.zip
fedora kernel: cd394142aac30b5c751f25b517572e2448695641v3.6.3-2f17
Signed-off-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'Documentation/devicetree/bindings/spi')
-rw-r--r--Documentation/devicetree/bindings/spi/nvidia,tegra20-spi.txt (renamed from Documentation/devicetree/bindings/spi/spi_nvidia.txt)0
-rw-r--r--Documentation/devicetree/bindings/spi/spi-orion.txt19
-rw-r--r--Documentation/devicetree/bindings/spi/spi-samsung.txt116
3 files changed, 135 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/spi/spi_nvidia.txt b/Documentation/devicetree/bindings/spi/nvidia,tegra20-spi.txt
index 6b9e5189669..6b9e5189669 100644
--- a/Documentation/devicetree/bindings/spi/spi_nvidia.txt
+++ b/Documentation/devicetree/bindings/spi/nvidia,tegra20-spi.txt
diff --git a/Documentation/devicetree/bindings/spi/spi-orion.txt b/Documentation/devicetree/bindings/spi/spi-orion.txt
new file mode 100644
index 00000000000..a3ff50fc76f
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/spi-orion.txt
@@ -0,0 +1,19 @@
+Marvell Orion SPI device
+
+Required properties:
+- compatible : should be "marvell,orion-spi".
+- reg : offset and length of the register set for the device
+- cell-index : Which of multiple SPI controllers is this.
+Optional properties:
+- interrupts : Is currently not used.
+
+Example:
+ spi@10600 {
+ compatible = "marvell,orion-spi";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ cell-index = <0>;
+ reg = <0x10600 0x28>;
+ interrupts = <23>;
+ status = "disabled";
+ };
diff --git a/Documentation/devicetree/bindings/spi/spi-samsung.txt b/Documentation/devicetree/bindings/spi/spi-samsung.txt
new file mode 100644
index 00000000000..a15ffeddfba
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/spi-samsung.txt
@@ -0,0 +1,116 @@
+* Samsung SPI Controller
+
+The Samsung SPI controller is used to interface with various devices such as flash
+and display controllers using the SPI communication interface.
+
+Required SoC Specific Properties:
+
+- compatible: should be one of the following.
+ - samsung,s3c2443-spi: for s3c2443, s3c2416 and s3c2450 platforms
+ - samsung,s3c6410-spi: for s3c6410 platforms
+ - samsung,s5p6440-spi: for s5p6440 and s5p6450 platforms
+ - samsung,s5pv210-spi: for s5pv210 and s5pc110 platforms
+ - samsung,exynos4210-spi: for exynos4 and exynos5 platforms
+
+- reg: physical base address of the controller and length of memory mapped
+ region.
+
+- interrupts: The interrupt number to the cpu. The interrupt specifier format
+ depends on the interrupt controller.
+
+[PRELIMINARY: the dma channel allocation will change once there are
+official DMA bindings]
+
+- tx-dma-channel: The dma channel specifier for tx operations. The format of
+ the dma specifier depends on the dma controller.
+
+- rx-dma-channel: The dma channel specifier for rx operations. The format of
+ the dma specifier depends on the dma controller.
+
+Required Board Specific Properties:
+
+- #address-cells: should be 1.
+- #size-cells: should be 0.
+- gpios: The gpio specifier for clock, mosi and miso interface lines (in the
+ order specified). The format of the gpio specifier depends on the gpio
+ controller.
+
+Optional Board Specific Properties:
+
+- samsung,spi-src-clk: If the spi controller includes a internal clock mux to
+ select the clock source for the spi bus clock, this property can be used to
+ indicate the clock to be used for driving the spi bus clock. If not specified,
+ the clock number 0 is used as default.
+
+- num-cs: Specifies the number of chip select lines supported. If
+ not specified, the default number of chip select lines is set to 1.
+
+SPI Controller specific data in SPI slave nodes:
+
+- The spi slave nodes should provide the following information which is required
+ by the spi controller.
+
+ - cs-gpio: A gpio specifier that specifies the gpio line used as
+ the slave select line by the spi controller. The format of the gpio
+ specifier depends on the gpio controller.
+
+ - samsung,spi-feedback-delay: The sampling phase shift to be applied on the
+ miso line (to account for any lag in the miso line). The following are the
+ valid values.
+
+ - 0: No phase shift.
+ - 1: 90 degree phase shift sampling.
+ - 2: 180 degree phase shift sampling.
+ - 3: 270 degree phase shift sampling.
+
+Aliases:
+
+- All the SPI controller nodes should be represented in the aliases node using
+ the following format 'spi{n}' where n is a unique number for the alias.
+
+
+Example:
+
+- SoC Specific Portion:
+
+ spi_0: spi@12d20000 {
+ compatible = "samsung,exynos4210-spi";
+ reg = <0x12d20000 0x100>;
+ interrupts = <0 66 0>;
+ tx-dma-channel = <&pdma0 5>;
+ rx-dma-channel = <&pdma0 4>;
+ };
+
+- Board Specific Portion:
+
+ spi_0: spi@12d20000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ gpios = <&gpa2 4 2 3 0>,
+ <&gpa2 6 2 3 0>,
+ <&gpa2 7 2 3 0>;
+
+ w25q80bw@0 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "w25x80";
+ reg = <0>;
+ spi-max-frequency = <10000>;
+
+ controller-data {
+ cs-gpio = <&gpa2 5 1 0 3>;
+ samsung,spi-feedback-delay = <0>;
+ };
+
+ partition@0 {
+ label = "U-Boot";
+ reg = <0x0 0x40000>;
+ read-only;
+ };
+
+ partition@40000 {
+ label = "Kernel";
+ reg = <0x40000 0xc0000>;
+ };
+ };
+ };