From patchwork Mon Dec 14 13:53:48 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Markus Pargmann X-Patchwork-Id: 7844731 Return-Path: X-Original-To: patchwork-linux-input@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 59902BEEE1 for ; Mon, 14 Dec 2015 13:54:47 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 656D720412 for ; Mon, 14 Dec 2015 13:54:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6BAD4202EB for ; Mon, 14 Dec 2015 13:54:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932477AbbLNNyl (ORCPT ); Mon, 14 Dec 2015 08:54:41 -0500 Received: from metis.ext.4.pengutronix.de ([92.198.50.35]:42930 "EHLO metis.ext.4.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932488AbbLNNyk (ORCPT ); Mon, 14 Dec 2015 08:54:40 -0500 Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7]) by metis.ext.pengutronix.de with esmtps (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.80) (envelope-from ) id 1a8TaE-0002lB-Es; Mon, 14 Dec 2015 14:54:34 +0100 Received: from mpa by dude.hi.pengutronix.de with local (Exim 4.86) (envelope-from ) id 1a8TaC-0000gA-TH; Mon, 14 Dec 2015 14:54:32 +0100 From: Markus Pargmann To: Shawn Guo , Dmitry Torokhov , Jonathan Cameron , Lee Jones Cc: Denis Carikli , =?UTF-8?q?Eric=20B=C3=A9nard?= , Sascha Hauer , devicetree@vger.kernel.org, linux-input@vger.kernel.org, linux-iio@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Hartmut Knaack , Fabio Estevam , Markus Pargmann Subject: [PATCH v10 2/8] ARM: dt: Binding documentation for imx25 GCQ Date: Mon, 14 Dec 2015 14:53:48 +0100 Message-Id: <1450101234-2191-3-git-send-email-mpa@pengutronix.de> X-Mailer: git-send-email 2.6.2 In-Reply-To: <1450101234-2191-1-git-send-email-mpa@pengutronix.de> References: <1450101234-2191-1-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-input@vger.kernel.org Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, 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 Acked-by: Rob Herring Acked-by: Jonathan Cameron --- Notes: Changes in v9: - Added the dt-bindings header to this patch instead of the driver Changes in v6: - Changed bindings to use adc-refp and adc-refn. Also a bit of cleanup in the setup routine. Changes in v5: - Fixed locking - Removed module owner .../devicetree/bindings/iio/adc/fsl,imx25-gcq.txt | 58 ++++++++++++++++++++++ include/dt-bindings/iio/adc/fsl-imx25-gcq.h | 18 +++++++ 2 files changed, 76 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/adc/fsl,imx25-gcq.txt create mode 100644 include/dt-bindings/iio/adc/fsl-imx25-gcq.h 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..b0866d36a307 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/fsl,imx25-gcq.txt @@ -0,0 +1,58 @@ +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-ext-supply: The regulator supplying the ADC reference voltage. + Required when at least one subnode uses the this reference. + - vref-xp-supply: The regulator supplying the ADC reference voltage on pin XP. + Required when at least one subnode uses this reference. + - vref-yp-supply: The regulator supplying the ADC reference voltage on pin YP. + Required when at least one subnode uses this 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 = ; + }; + }; diff --git a/include/dt-bindings/iio/adc/fsl-imx25-gcq.h b/include/dt-bindings/iio/adc/fsl-imx25-gcq.h new file mode 100644 index 000000000000..87abdd4a7674 --- /dev/null +++ b/include/dt-bindings/iio/adc/fsl-imx25-gcq.h @@ -0,0 +1,18 @@ +/* + * This header provides constants for configuring the I.MX25 ADC + */ + +#ifndef _DT_BINDINGS_IIO_ADC_FS_IMX25_GCQ_H +#define _DT_BINDINGS_IIO_ADC_FS_IMX25_GCQ_H + +#define MX25_ADC_REFP_YP 0 /* YP voltage reference */ +#define MX25_ADC_REFP_XP 1 /* XP voltage reference */ +#define MX25_ADC_REFP_EXT 2 /* External voltage reference */ +#define MX25_ADC_REFP_INT 3 /* Internal voltage reference */ + +#define MX25_ADC_REFN_XN 0 /* XN ground reference */ +#define MX25_ADC_REFN_YN 1 /* YN ground reference */ +#define MX25_ADC_REFN_NGND 2 /* Internal ground reference */ +#define MX25_ADC_REFN_NGND2 3 /* External ground reference */ + +#endif