summaryrefslogtreecommitdiffstats
path: root/Documentation/devicetree/bindings/spi/spi-samsung.txt
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/devicetree/bindings/spi/spi-samsung.txt')
-rw-r--r--Documentation/devicetree/bindings/spi/spi-samsung.txt27
1 files changed, 12 insertions, 15 deletions
diff --git a/Documentation/devicetree/bindings/spi/spi-samsung.txt b/Documentation/devicetree/bindings/spi/spi-samsung.txt
index 86aa061f069f..1e8a8578148f 100644
--- a/Documentation/devicetree/bindings/spi/spi-samsung.txt
+++ b/Documentation/devicetree/bindings/spi/spi-samsung.txt
@@ -8,7 +8,6 @@ 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
@@ -18,14 +17,11 @@ Required SoC Specific Properties:
- 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]
+- dmas : Two or more DMA channel specifiers following the convention outlined
+ in bindings/dma/dma.txt
-- 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.
+- dma-names: Names for the dma channels. There must be at least one channel
+ named "tx" for transmit and named "rx" for receive.
Required Board Specific Properties:
@@ -42,15 +38,13 @@ Optional Board Specific Properties:
- num-cs: Specifies the number of chip select lines supported. If
not specified, the default number of chip select lines is set to 1.
+- cs-gpios: should specify GPIOs used for chipselects (see spi-bus.txt)
+
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.
@@ -74,8 +68,11 @@ Example:
compatible = "samsung,exynos4210-spi";
reg = <0x12d20000 0x100>;
interrupts = <0 66 0>;
- tx-dma-channel = <&pdma0 5>;
- rx-dma-channel = <&pdma0 4>;
+ dmas = <&pdma0 5
+ &pdma0 4>;
+ dma-names = "tx", "rx";
+ #address-cells = <1>;
+ #size-cells = <0>;
};
- Board Specific Portion:
@@ -85,6 +82,7 @@ Example:
#size-cells = <0>;
pinctrl-names = "default";
pinctrl-0 = <&spi0_bus>;
+ cs-gpios = <&gpa2 5 0>;
w25q80bw@0 {
#address-cells = <1>;
@@ -94,7 +92,6 @@ Example:
spi-max-frequency = <10000>;
controller-data {
- cs-gpio = <&gpa2 5 1 0 3>;
samsung,spi-feedback-delay = <0>;
};