Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932350AbbKYFcS (ORCPT ); Wed, 25 Nov 2015 00:32:18 -0500 Received: from mail-qg0-f54.google.com ([209.85.192.54]:32929 "EHLO mail-qg0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754859AbbKYFbF (ORCPT ); Wed, 25 Nov 2015 00:31:05 -0500 From: Cory Tusar To: robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com, ijc+devicetree@hellion.org.uk, galak@codeaurora.org, agust@denx.de, gregkh@linuxfoundation.org Cc: jic23@kernel.org, vz@mleia.com, broonie@kernel.org, afd@ti.com, andrew@lunn.ch, Chris.Healy@zii.aero, Keith.Vennel@zii.aero, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Cory Tusar Subject: [PATCH v3 2/5] Documentation: devicetree: Add DT bindings to eeprom_93xx46 driver. Date: Wed, 25 Nov 2015 00:30:49 -0500 Message-Id: <1448429452-26972-3-git-send-email-cory.tusar@pid1solutions.com> X-Mailer: git-send-email 2.4.10 In-Reply-To: <1448429452-26972-1-git-send-email-cory.tusar@pid1solutions.com> References: <1448429452-26972-1-git-send-email-cory.tusar@pid1solutions.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1905 Lines: 54 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 Acked-by: Rob Herring --- .../devicetree/bindings/misc/eeprom-93xx46.txt | 25 ++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/Documentation/devicetree/bindings/misc/eeprom-93xx46.txt b/Documentation/devicetree/bindings/misc/eeprom-93xx46.txt new file mode 100644 index 0000000..a8ebb46 --- /dev/null +++ b/Documentation/devicetree/bindings/misc/eeprom-93xx46.txt @@ -0,0 +1,25 @@ +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>; + }; -- 2.4.10 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/