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Commit dc4dc360 authored by Laxman Dewangan's avatar Laxman Dewangan Committed by Mark Brown
Browse files

spi: tegra: add spi driver for SLINK controller 



Tegra20/Tegra30 supports the spi interface through its SLINK
controller. Add spi driver for SLINK controller.

Signed-off-by: default avatarLaxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: default avatarStephen Warren <swarren@nvidia.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 8f0d8163

Documentation/devicetree/bindings/spi/nvidia,tegra20-slink.txt

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NVIDIA Tegra20/Tegra30 SLINK controller.



Required properties:

- compatible : should be "nvidia,tegra20-slink", "nvidia,tegra30-slink".

- reg: Should contain SLINK registers location and length.

- interrupts: Should contain SLINK interrupts.

- nvidia,dma-request-selector : The Tegra DMA controller's phandle and

  request selector for this SLINK controller.



Recommended properties:

- spi-max-frequency: Definition as per

                     Documentation/devicetree/bindings/spi/spi-bus.txt



Example:



slink@7000d600 {

	compatible = "nvidia,tegra20-slink";

	reg = <0x7000d600 0x200>;

	interrupts = <0 82 0x04>;

	nvidia,dma-request-selector = <&apbdma 16>;

	spi-max-frequency = <25000000>;

	#address-cells = <1>;

	#size-cells = <0>;

	status = "disabled";

};

drivers/spi/Kconfig

+6 −0
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@@ -385,6 +385,12 @@ config SPI_MXS 
	help

	  SPI driver for Freescale MXS devices.



config SPI_TEGRA20_SLINK

	tristate "Nvidia Tegra20/Tegra30 SLINK Controller"

	depends on ARCH_TEGRA && TEGRA20_APB_DMA

	help

	  SPI driver for Nvidia Tegra20/Tegra30 SLINK Controller interface.



config SPI_TI_SSP

	tristate "TI Sequencer Serial Port - SPI Support"

	depends on MFD_TI_SSP

drivers/spi/Makefile

+1 −1
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@@ -60,10 +60,10 @@ obj-$(CONFIG_SPI_SH_MSIOF) += spi-sh-msiof.o 
obj-$(CONFIG_SPI_SH_SCI)		+= spi-sh-sci.o

obj-$(CONFIG_SPI_SIRF)		+= spi-sirf.o

obj-$(CONFIG_SPI_STMP3XXX)		+= spi-stmp.o

obj-$(CONFIG_SPI_TEGRA20_SLINK)		+= spi-tegra20-slink.o

obj-$(CONFIG_SPI_TI_SSP)		+= spi-ti-ssp.o

obj-$(CONFIG_SPI_TLE62X0)		+= spi-tle62x0.o

obj-$(CONFIG_SPI_TOPCLIFF_PCH)		+= spi-topcliff-pch.o

obj-$(CONFIG_SPI_TXX9)			+= spi-txx9.o

obj-$(CONFIG_SPI_XCOMM)		+= spi-xcomm.o

obj-$(CONFIG_SPI_XILINX)		+= spi-xilinx.o