From patchwork Thu Jan 29 14:09:10 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Markus Pargmann X-Patchwork-Id: 5742661 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 95773BF440 for ; Thu, 29 Jan 2015 14:13:04 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C5F0620254 for ; Thu, 29 Jan 2015 14:13:03 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E7E7220251 for ; Thu, 29 Jan 2015 14:13:02 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YGpoN-0005aN-9d; Thu, 29 Jan 2015 14:11:11 +0000 Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YGpnN-0003ZY-SP for linux-arm-kernel@lists.infradead.org; Thu, 29 Jan 2015 14:10:10 +0000 Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7]) by metis.ext.pengutronix.de with esmtp (Exim 4.72) (envelope-from ) id 1YGpmt-0004G1-7w; Thu, 29 Jan 2015 15:09:39 +0100 Received: from mpa by dude.hi.pengutronix.de with local (Exim 4.84) (envelope-from ) id 1YGpmo-0004aG-Vb; Thu, 29 Jan 2015 15:09:34 +0100 From: Markus Pargmann To: Shawn Guo , Samuel Ortiz , Dmitry Torokhov , Jonathan Cameron , Fabio Estevam , Peter Meerwald , Hartmut Knaack Subject: [PATCH v6 2/8] ARM: dt: Binding documentation for imx25 GCQ Date: Thu, 29 Jan 2015 15:09:10 +0100 Message-Id: <1422540556-14828-3-git-send-email-mpa@pengutronix.de> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1422540556-14828-1-git-send-email-mpa@pengutronix.de> References: <1422540556-14828-1-git-send-email-mpa@pengutronix.de> X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: mpa@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150129_061010_146978_E78546E9 X-CRM114-Status: GOOD ( 13.84 ) X-Spam-Score: -0.0 (/) Cc: Mark Rutland , devicetree@vger.kernel.org, Lars-Peter Clausen , =?UTF-8?q?Eric=20B=C3=A9nard?= , Pawel Moll , Ian Campbell , linux-iio@vger.kernel.org, Kumar Gala , Denis Carikli , Rob Herring , Sascha Hauer , linux-input@vger.kernel.org, Markus Pargmann , Lee Jones , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The documentation describes the bindings for the imx25 GCQ unit which is essentially a generic conversion queue using the imx25 ADC. Signed-off-by: Markus Pargmann --- Notes: Changes in v6: - Moved the raw_read code out to a different function to cleanup the code - Changed bindings to use adc-refp and adc-refn. Also a bit of cleanup in the setup routine. - Added defines for a complete list of references in the dt binding macros Changes in v5: - Fixed locking - Removed module owner .../devicetree/bindings/iio/adc/fsl,imx25-gcq.txt | 54 ++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/adc/fsl,imx25-gcq.txt diff --git a/Documentation/devicetree/bindings/iio/adc/fsl,imx25-gcq.txt b/Documentation/devicetree/bindings/iio/adc/fsl,imx25-gcq.txt new file mode 100644 index 000000000000..9f7c08990034 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/fsl,imx25-gcq.txt @@ -0,0 +1,54 @@ +Freescale i.MX25 ADC GCQ device + +This is a generic conversion queue device that can convert any of the +analog inputs using the ADC unit of the i.MX25. + +Required properties: + - compatible: Should be "fsl,imx25-gcq". + - reg: Should be the register range of the module. + - interrupts: Should be the interrupt number of the module. + Typically this is <1>. + - interrupt-parent: phandle to the tsadc module of the i.MX25. + - #address-cells: Should be <1> (setting for the subnodes) + - #size-cells: Should be <0> (setting for the subnodes) + +Optional properties: + - vref-supply: The regulator supplying the ADC reference voltage. + Required when at least one subnode uses the external reference. + +Sub-nodes: +Optionally you can define subnodes which define the reference voltage +for the analog inputs. + +Required properties for subnodes: + - reg: Should be the number of the analog input. + 0: xp + 1: yp + 2: xn + 3: yn + 4: wiper + 5: inaux0 + 6: inaux1 + 7: inaux2 +Optional properties for subnodes: + - fsl,adc-refp: specifies the positive reference input as defined in + + - fsl,adc-refn: specifies the negative reference input as defined in + + +Example: + + adc: adc@50030800 { + compatible = "fsl,imx25-gcq"; + reg = <0x50030800 0x60>; + interrupt-parent = <&tscadc>; + interrupts = <1>; + #address-cells = <1>; + #size-cells = <0>; + + inaux@5 { + reg = <5>; + fsl,adc-refp = ; + fsl,adc-refn = ; + }; + };