Documentation: devicetree: Add DT bindings to eeprom_93xx46 driver. (862a4a78) · Commits · 戴 / test

This commit documents bindings to be added to the eeprom_93xx46 driver which will allow: - Device word size and read-only attributes to be specified. - A device-specific compatible string for use with Atmel AT93C46D EEPROMs. - Specifying a GPIO line to function as a 'select' or 'enable' signal prior to accessing the EEPROM. Signed-off-by:

Cory Tusar <cory.tusar@pid1solutions.com> Acked-by:

Rob Herring <robh@kernel.org> Tested-by:

Chris Healy <chris.healy@zii.aero> Signed-off-by:

Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/misc/eeprom-93xx46.txt

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			EEPROMs (SPI) compatible with Microchip Technology 93xx46 family.

			Required properties:
			- compatible : shall be one of:
			"atmel,at93c46d"
			"eeprom-93xx46"
			- data-size : number of data bits per word (either 8 or 16)

			Optional properties:
			- read-only : parameter-less property which disables writes to the EEPROM
			- select-gpios : if present, specifies the GPIO that will be asserted prior to
			each access to the EEPROM (e.g. for SPI bus multiplexing)

			Property rules described in Documentation/devicetree/bindings/spi/spi-bus.txt
			apply. In particular, "reg" and "spi-max-frequency" properties must be given.

			Example:
			eeprom@0 {
			compatible = "eeprom-93xx46";
			reg = <0>;
			spi-max-frequency = <1000000>;
			spi-cs-high;
			data-size = <8>;
			select-gpios = <&gpio4 4 GPIO_ACTIVE_HIGH>;
			};

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