From patchwork Tue Dec 23 02:53:09 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chen-Yu Tsai X-Patchwork-Id: 5529731 Return-Path: X-Original-To: patchwork-linux-input@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 676C09F4DC for ; Tue, 23 Dec 2014 03:00:18 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 82E322010E for ; Tue, 23 Dec 2014 03:00:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7FB7020138 for ; Tue, 23 Dec 2014 03:00:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754594AbaLWDAM (ORCPT ); Mon, 22 Dec 2014 22:00:12 -0500 Received: from smtp.csie.ntu.edu.tw ([140.112.30.61]:34306 "EHLO smtp.csie.ntu.edu.tw" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754584AbaLWDAJ (ORCPT ); Mon, 22 Dec 2014 22:00:09 -0500 Received: from mirror2.csie.ntu.edu.tw (mirror2.csie.ntu.edu.tw [140.112.30.76]) (Authenticated sender: b93043) by smtp.csie.ntu.edu.tw (Postfix) with ESMTPSA id CFF7220BFC; Tue, 23 Dec 2014 10:53:15 +0800 (CST) Received: by mirror2.csie.ntu.edu.tw (Postfix, from userid 1000) id BB8DC604EF; Tue, 23 Dec 2014 10:53:15 +0800 (CST) From: Chen-Yu Tsai To: Lee Jones , Mark Brown , Maxime Ripard , Dmitry Torokhov Cc: linux-sunxi@googlegroups.com, Carlo Caione , linux-arm-kernel@lists.infradead.org, linux-input@vger.kernel.org, linux-doc@vger.kernel.org, Chen-Yu Tsai Subject: [PATCH v8 1/6] mfd: AXP20x: Add bindings documentation Date: Tue, 23 Dec 2014 10:53:09 +0800 Message-Id: <1419303194-3075-2-git-send-email-wens@csie.org> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1419303194-3075-1-git-send-email-wens@csie.org> References: <1419303194-3075-1-git-send-email-wens@csie.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 From: Carlo Caione Bindings documentation for the AXP20x driver. In this file also sub-nodes are documented. Signed-off-by: Carlo Caione Acked-by: Maxime Ripard [wens@csie.org: clarify interrupt source for the axp PMIC] [wens@csie.org: explain dcdc-workmode in detail and trim lines to 80 chars] [wens@csie.org: make regulator supplies optional if using unregulated input] [wens@csie.org: use cubieboard2 regulator nodes as example] Signed-off-by: Chen-Yu Tsai --- Documentation/devicetree/bindings/mfd/axp20x.txt | 97 ++++++++++++++++++++++++ 1 file changed, 97 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/axp20x.txt diff --git a/Documentation/devicetree/bindings/mfd/axp20x.txt b/Documentation/devicetree/bindings/mfd/axp20x.txt new file mode 100644 index 000000000000..b775d8ccbc7c --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/axp20x.txt @@ -0,0 +1,97 @@ +AXP202/AXP209 device tree bindings + +The axp20x family current members : +axp202 (X-Powers) +axp209 (X-Powers) + +Required properties: +- compatible: "x-powers,axp202" or "x-powers,axp209" +- reg: The I2C slave address for the AXP chip +- interrupt-parent: The parent interrupt controller +- interrupts: SoC NMI / GPIO interrupt connected to the PMIC's IRQ pin +- interrupt-controller: axp20x has its own internal IRQs +- #interrupt-cells: Should be set to 1 +- regulators: A node that houses a sub-node for each regulator. The regulators + are bound using their name as listed here: dcdc2, dcdc3, ldo1, + ldo2, ldo3, ldo4, ldo5. The bindings details of individual + regulator device can be found in: + Documentation/devicetree/bindings/regulator/regulator.txt with + the exception of x-powers,dcdc-freq. Regulators not used should + still be listed for completeness and that the regulator subsystem + properly registers them. + +- x-powers,dcdc-freq: defines the work frequency of DC-DC in KHz + (range: 750-1875). Default: 1.5MHz + +Optional properties: +- regulator supplies - may be omitted if inputs are unregulated, such as using + the IPSOUT output from the PMIC + - acin-supply: The input supply for LDO1 + - vin2-supply: The input supply for DCDC2 + - vin3-supply: The input supply for DCDC3 + - ldo24in-supply: The input supply for LDO2, LDO4 + - ldo3in-supply: The input supply for LDO3 + - ldo5in-supply: The input supply for LDO5 + +Optional properties for DCDC regulators: +- x-powers,dcdc-workmode: 1 for PWM mode, 0 for AUTO (PWM/PFM) mode + Default: AUTO mode + The DCDC regulators work in a mixed PWM/PFM mode, + using PFM under light loads and switching to PWM + for heavier loads. Forcing PWM mode trades efficiency + under light loads for lower output noise. This + probably makes sense for HiFi audio related + applications that aren't battery constrained. + +Example: + +axp209: pmic@34 { + compatible = "x-powers,axp209"; + reg = <0x34>; + interrupt-parent = <&nmi_intc>; + interrupts = <0 IRQ_TYPE_LEVEL_LOW>; + interrupt-controller; + #interrupt-cells = <1>; + + regulators { + x-powers,dcdc-freq = <1500>; + + vdd_cpu: dcdc2 { + regulator-always-on; + regulator-min-microvolt = <1000000>; + regulator-max-microvolt = <1450000>; + regulator-name = "vdd-cpu"; + }; + + vdd_int_dll: dcdc3 { + regulator-always-on; + regulator-min-microvolt = <1000000>; + regulator-max-microvolt = <1400000>; + regulator-name = "vdd-int-dll"; + }; + + vdd_rtc: ldo1 { + regulator-always-on; + regulator-min-microvolt = <1200000>; + regulator-max-microvolt = <1400000>; + regulator-name = "vdd-rtc"; + }; + + avcc: ldo2 { + regulator-always-on; + regulator-min-microvolt = <2700000>; + regulator-max-microvolt = <3300000>; + regulator-name = "avcc"; + }; + + ldo3 { + /* unused */ + }; + + csi1_io_2v8: ldo4 { + /* output on extension headers */ + regulator-name = "csi1-io-2v8"; + }; + }; +}; +