From 26aafa77df61c4190eae80646211ee6f07c88eaf Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Tue, 26 Feb 2013 11:07:32 +0800 Subject: spi: mxs-spi: move to use generic DMA helper With the generic DMA device tree helper supported by mxs-dma driver, client devices only need to call dma_request_slave_channel() for requesting a DMA channel from dmaengine. Since mxs is a DT only platform now, along with the changes, the non-DT case handling in probe function also gets removed. Signed-off-by: Shawn Guo Acked-by: Grant Likely Reviewed-by: Arnd Bergmann --- Documentation/devicetree/bindings/spi/mxs-spi.txt | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) (limited to 'Documentation/devicetree/bindings/spi') diff --git a/Documentation/devicetree/bindings/spi/mxs-spi.txt b/Documentation/devicetree/bindings/spi/mxs-spi.txt index e2e13957c2a..3499b73293c 100644 --- a/Documentation/devicetree/bindings/spi/mxs-spi.txt +++ b/Documentation/devicetree/bindings/spi/mxs-spi.txt @@ -3,8 +3,11 @@ Required properties: - compatible: Should be "fsl,-spi", where soc is "imx23" or "imx28" - reg: Offset and length of the register set for the device -- interrupts: Should contain SSP interrupts (error irq first, dma irq second) -- fsl,ssp-dma-channel: APBX DMA channel for the SSP +- interrupts: Should contain SSP ERROR interrupt +- dmas: DMA specifier, consisting of a phandle to DMA controller node + and SSP DMA channel ID. + Refer to dma.txt and fsl-mxs-dma.txt for details. +- dma-names: Must be "rx-tx". Optional properties: - clock-frequency : Input clock frequency to the SPI block in Hz. @@ -17,6 +20,7 @@ ssp0: ssp@80010000 { #size-cells = <0>; compatible = "fsl,imx28-spi"; reg = <0x80010000 0x2000>; - interrupts = <96 82>; - fsl,ssp-dma-channel = <0>; + interrupts = <96>; + dmas = <&dma_apbh 0>; + dma-names = "rx-tx"; }; -- cgit v1.2.3-70-g09d2 From eed48556a789d2c7fd2dacbc0060e463ed72e449 Mon Sep 17 00:00:00 2001 From: Murali Karicheri Date: Wed, 3 Apr 2013 19:39:07 +0530 Subject: spi/davinci: add DT binding documentation Add binding documentation for spi-davinci module. [prakash.pm@ti.com: Follow DT naming convention for compatible property] Signed-off-by: Murali Karicheri Acked-by: Grant Likely Signed-off-by: Manjunathappa, Prakash Signed-off-by: Sekhar Nori --- .../devicetree/bindings/spi/spi-davinci.txt | 51 ++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 Documentation/devicetree/bindings/spi/spi-davinci.txt (limited to 'Documentation/devicetree/bindings/spi') diff --git a/Documentation/devicetree/bindings/spi/spi-davinci.txt b/Documentation/devicetree/bindings/spi/spi-davinci.txt new file mode 100644 index 00000000000..6d0ac8d0ad9 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/spi-davinci.txt @@ -0,0 +1,51 @@ +Davinci SPI controller device bindings + +Required properties: +- #address-cells: number of cells required to define a chip select + address on the SPI bus. Should be set to 1. +- #size-cells: should be zero. +- compatible: + - "ti,dm6441-spi" for SPI used similar to that on DM644x SoC family + - "ti,da830-spi" for SPI used similar to that on DA8xx SoC family +- reg: Offset and length of SPI controller register space +- num-cs: Number of chip selects +- ti,davinci-spi-intr-line: interrupt line used to connect the SPI + IP to the interrupt controller within the SoC. Possible values + are 0 and 1. Manual says one of the two possible interrupt + lines can be tied to the interrupt controller. Set this + based on a specifc SoC configuration. +- interrupts: interrupt number mapped to CPU. +- clocks: spi clk phandle + +Example of a NOR flash slave device (n25q032) connected to DaVinci +SPI controller device over the SPI bus. + +spi0:spi@20BF0000 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "ti,dm6446-spi"; + reg = <0x20BF0000 0x1000>; + num-cs = <4>; + ti,davinci-spi-intr-line = <0>; + interrupts = <338>; + clocks = <&clkspi>; + + flash: n25q032@0 { + #address-cells = <1>; + #size-cells = <1>; + compatible = "st,m25p32"; + spi-max-frequency = <25000000>; + reg = <0>; + + partition@0 { + label = "u-boot-spl"; + reg = <0x0 0x80000>; + read-only; + }; + + partition@1 { + label = "test"; + reg = <0x80000 0x380000>; + }; + }; +}; -- cgit v1.2.3-70-g09d2