DART-6UL SPI: Difference between revisions
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<pre>&ecspi1 { | <pre>&ecspi1 { | ||
fsl,spi-num-chipselects = <1>; | fsl,spi-num-chipselects = <1>; | ||
cs-gpios = <& | cs-gpios = <&gpio3 10 0>; | ||
pinctrl-names = "default"; | pinctrl-names = "default"; | ||
pinctrl-0 = <& | pinctrl-0 = <&pinctrl_ecspi1_1>; | ||
status = "okay"; | status = "okay"; | ||
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}; | }; | ||
*/ | */ | ||
}; | |||
};</pre> | };</pre> | ||
Pick and choose the right chip select and you can also have multiple chip selects. | Pick and choose the right chip select and you can also have multiple chip selects. | ||
* Compile the Linux kernel and device tree. | * Compile the Linux kernel and device tree. | ||
* For testing use the application:<br>https://raw.githubusercontent.com/varigit/linux-2.6-imx/master/Documentation/spi/spidev_test.c | * For testing use the application:<br>https://raw.githubusercontent.com/varigit/linux-2.6-imx/master/Documentation/spi/spidev_test.c | ||
Revision as of 09:55, 28 December 2015
DART-6UL- SPI
Testing SPI from user space require some changes.
- Configure your kernel and add spidev driver. Device Drivers -> SPI support -> <*> User mode SPI device driver support
- Add spidev to your device tree
&ecspi1 {
fsl,spi-num-chipselects = <1>;
cs-gpios = <&gpio3 10 0>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_ecspi1_1>;
status = "okay";
chip1: spidev@0 {
compatible = "spidev";
spi-max-frequency = <12000000>;
reg = <0>;
};
/*
chip2: spidev@1 {
compatible = "spidev";
spi-max-frequency = <20000000>;
reg = <1>;
};
*/
};
};
Pick and choose the right chip select and you can also have multiple chip selects.
- Compile the Linux kernel and device tree.
- For testing use the application:
https://raw.githubusercontent.com/varigit/linux-2.6-imx/master/Documentation/spi/spidev_test.c