Difference between revisions of "Enabling SPI1 and SPI3 on Linux (Naon)"
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=== Patch download === | === Patch download === | ||
| − | * U-Boot: | + | * U-Boot: [[File:U-boot-nelk-spi1-cs1-spi3-cs1.patch.zip]] |
| − | * Linux: | + | * Linux: [[File:Linux-nelk-spi1-cs1-spi3-cs1.patch.zip]] |
Revision as of 09:49, 3 September 2013
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Contents
Introduction[edit | edit source]
This article shows how to enable the SPI1 and SPI3 interfaces which can be used in a standard Linux application.
Pin Mux Option[edit | edit source]
SPI1 signals are available at different Naon pins. The following configuration can be used:
Option 1[edit | edit source]
| Signal | Naon Connector Phisical Pin | CPU Ball |
|---|---|---|
U-Boot patches[edit | edit source]
 The patches below applies to NELK 4.0.0 and above U-Boot source tree. |
The files arch/arm/mach-omap2/board-diva.c and arch/arm/mach-omap2/diva_pinmux_table.h must be modified according to the following patches:
U-Boot must be rebuilt to make these modifications effective.
Linux kernel patches[edit | edit source]
|
The patches below applies to NELK 4.0.0 and above Linux source tree. |
The files arch/arm/mach-omap2/board-diva.c and arch/arm/mach-omap2/diva_pinmux_table.h must be modified according to the following patches:
The kernel must be rebuilt to make these modifications effective.
Using the interfaces[edit | edit source]
Users can access the peripherals connected to the SP1 and SPI3 buses through the spidev interface. For further information, please refer to
- https://www.kernel.org/doc/Documentation/spi/spidev
- https://www.kernel.org/doc/Documentation/spi/spidev_test.c
