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Commit 85cd7467 authored by Ernst Schwab's avatar Ernst Schwab Committed by Grant Likely
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powerpc/of: added documentation for spi chipselects 



Added devicetree binding documentation for gpios used as chipselect. The
code to evaluate these is already present in spi_mpc8xxx.c.

Signed-off-by: default avatarErnst Schwab <eschwab@online.de>
Reviewed-by: default avatarWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
parent e9cb0a49

Documentation/powerpc/dts-bindings/fsl/spi.txt

+7 −0
Original line number Original line Diff line number Diff line
@@ -13,6 +13,11 @@ Required properties: 
- interrupt-parent : the phandle for the interrupt controller that

- interrupt-parent : the phandle for the interrupt controller that

  services interrupts for this device.

  services interrupts for this device.





Optional properties:

- gpios : specifies the gpio pins to be used for chipselects.

  The gpios will be referred to as reg = <index> in the SPI child nodes.

  If unspecified, a single SPI device without a chip select can be used.



Example:

Example:

	spi@4c0 {

	spi@4c0 {

		cell-index = <0>;

		cell-index = <0>;
@@ -21,4 +26,6 @@ Example: 
		interrupts = <82 0>;

		interrupts = <82 0>;

		interrupt-parent = <700>;

		interrupt-parent = <700>;

		mode = "cpu";

		mode = "cpu";

		gpios = <&gpio 18 1	// device reg=<0>

			 &gpio 19 1>;	// device reg=<1>

	};
 
	};