From patchwork Thu Jan 16 10:29:32 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sachin Kamat X-Patchwork-Id: 311690 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3800E2C009F for ; Thu, 16 Jan 2014 21:33:52 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751714AbaAPKdv (ORCPT ); Thu, 16 Jan 2014 05:33:51 -0500 Received: from mail-pb0-f49.google.com ([209.85.160.49]:56412 "EHLO mail-pb0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751628AbaAPKds (ORCPT ); Thu, 16 Jan 2014 05:33:48 -0500 Received: by mail-pb0-f49.google.com with SMTP id up15so1957517pbc.36 for ; Thu, 16 Jan 2014 02:33:47 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=uHQVhs26AUfecnRidVQ0vrlByvHmHzv68nqVYEFrMJA=; b=AtPHIellK+t7DIuohZ/laSLsuO/Vj3YMbJSzpVcax/56DX0sEzCj1kegoOr7GPtcS3 bZzkueh8jaOa4rjOznAtzE1jxo+iWwPkrJCzk5c5z5L7a7oiluOkXaiivPAjlxZKPViM SNbRpYDXHYOFDuvvnQTH2ijmwwQF0XjWr4Six7B8/ZFakcSAgbBkBqVPScl0FeJjZRLJ TSGQnCkSMbX52H7/y71JCFYK4qoWChEjXWMMEfdWg9X+W5t91ofaaS6XD1QWY4C/0Hcw 7oF/Gd2A/7DlfGAdmgvdUmnD6kqGwf8kOVOPkju/w4sttOzlRnHUJyzwwKU9R0RBRCNi ax2A== X-Gm-Message-State: ALoCoQnynHqbmV8PaLb02W8vmVc4cSET3QYMmHLn2solPH/gWxMK2UhvcNAFdhCDrgdDrDfyaz39 X-Received: by 10.68.136.66 with SMTP id py2mr8946312pbb.112.1389868427650; Thu, 16 Jan 2014 02:33:47 -0800 (PST) Received: from linaro.sisodomain.com ([115.113.119.130]) by mx.google.com with ESMTPSA id yd4sm14174733pbc.13.2014.01.16.02.33.44 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 16 Jan 2014 02:33:47 -0800 (PST) From: Sachin Kamat To: devicetree@vger.kernel.org Cc: mark.rutland@arm.com, sachin.kamat@linaro.org, lee.jones@linaro.org Subject: [PATCH v2 Resend] Documentation: mfd: Add binding document for S2MPA01 Date: Thu, 16 Jan 2014 15:59:32 +0530 Message-Id: <1389868172-11460-1-git-send-email-sachin.kamat@linaro.org> X-Mailer: git-send-email 1.7.9.5 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Added initial binding documentation for S2MPA01 MFD. Signed-off-by: Sachin Kamat --- * Re-organised as suggested by Mark Rutland. --- Documentation/devicetree/bindings/mfd/s2mpa01.txt | 86 +++++++++++++++++++++ 1 file changed, 86 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/s2mpa01.txt diff --git a/Documentation/devicetree/bindings/mfd/s2mpa01.txt b/Documentation/devicetree/bindings/mfd/s2mpa01.txt new file mode 100644 index 000000000000..70879b92b24b --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/s2mpa01.txt @@ -0,0 +1,86 @@ + +* Samsung S2MPA01 Voltage and Current Regulator + +The Samsung S2MPA01 is a multi-function device which includes high +efficiency buck converters including Dual-Phase buck converter, various LDOs, +and an RTC. It is interfaced to the host controller using an I2C interface. +Each sub-block is addressed by the host system using different I2C slave +addresses. + +Required properties: +- compatible: Should be "samsung,s2mpa01-pmic". +- reg: Specifies the I2C slave address of the PMIC block. It should be 0x66. + +Optional properties: +- interrupt-parent: Specifies the phandle of the interrupt controller to which + the interrupts from s2mpa01 are delivered to. +- interrupts: Interrupt specifier for interrupt source (connected to SoC). + +Optional nodes: +- regulators: The regulators of s2mpa01 that have to be instantiated should be + included in a sub-node named 'regulators'. Regulator nodes and constraints + included in this sub-node use the standard regulator bindings which are + documented elsewhere. + +Properties for BUCK regulator nodes: + regulator-ramp-delay for BUCKs = [6250/12500(default)/25000/50000] uV/us + + BUCK[1/2/3/4] supports disabling ramp delay on hardware, so explictly + regulator-ramp-delay = <0> can be used for them to disable ramp delay. + In the absence of the regulator-ramp-delay property, the default ramp + delay will be used. + + NOTE: Some BUCKs share the ramp rate setting i.e. same ramp value will be set + for a particular group of BUCKs. So provide same regulator-ramp-delay. + Grouping of BUCKs sharing ramp rate setting is as follow : BUCK[1, 6], + BUCK[2, 4], and BUCK[8, 9, 10] + +The following are the names of the regulators that the s2mpa01 PMIC block +supports. Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number +as per the datasheet of s2mpa01. + + - LDOn + - valid values for n are 1 to 26 + - Example: LDO1, LD02, LDO26 + - BUCKn + - valid values for n are 1 to 10. + - Example: BUCK1, BUCK2, BUCK9 + +Example: + + s2mpa01_pmic@66 { + compatible = "samsung,s2mpa01-pmic"; + reg = <0x66>; + + regulators { + ldo1_reg: LDO1 { + regulator-name = "VDD_ALIVE"; + regulator-min-microvolt = <1000000>; + regulator-max-microvolt = <1000000>; + }; + + ldo2_reg: LDO2 { + regulator-name = "VDDQ_MMC2"; + regulator-min-microvolt = <2800000>; + regulator-max-microvolt = <2800000>; + regulator-always-on; + }; + + buck1_reg: BUCK1 { + regulator-name = "vdd_mif"; + regulator-min-microvolt = <950000>; + regulator-max-microvolt = <1350000>; + regulator-always-on; + regulator-boot-on; + }; + + buck2_reg: BUCK2 { + regulator-name = "vdd_arm"; + regulator-min-microvolt = <950000>; + regulator-max-microvolt = <1350000>; + regulator-always-on; + regulator-boot-on; + regulator-ramp-delay = <50000>; + }; + }; + };