From patchwork Thu Feb 13 06:37:56 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sachin Kamat X-Patchwork-Id: 319891 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 365AA2C0090 for ; Thu, 13 Feb 2014 17:43:36 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752852AbaBMGnX (ORCPT ); Thu, 13 Feb 2014 01:43:23 -0500 Received: from mail-pd0-f173.google.com ([209.85.192.173]:53381 "EHLO mail-pd0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752826AbaBMGnW (ORCPT ); Thu, 13 Feb 2014 01:43:22 -0500 Received: by mail-pd0-f173.google.com with SMTP id y10so10061682pdj.18 for ; Wed, 12 Feb 2014 22:43:21 -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:in-reply-to :references; bh=90OZsmInN+yg0AbXkY909JHHSg2VcX99AjhOPOvL6zY=; b=TvJg6uhb6zCyr6SHcKkzfT43m9QjcEvc1H9pOHF5Ewdp5XVvgYUCYOioiDa2urQiK4 /EPY/ZE9YESdYDNTCUG20wTFmtwMGFvA3pGh8RaZFr3QJyKSNEmq3kHfLPmArthuESV+ z5bUmEuEtdyg6xvwpW6xPudgkh0HwuTB2Df5iEZeyaxBSxr+beqfWCtEoTtZS9NN2psG Sh/4L9Y2P1uHD5P/54P7L2vF7Q6HBAglGajt4E0QvMfwJHT8C9GC2XTYyu0LmsEd1qn9 ekzjtnwDaNBKSG0C4u3U3g6TJs3skHL3fh8ue+NB6D+KZYR/jy5WqIcReK/9YUMe+HQq HysA== X-Gm-Message-State: ALoCoQm3gHX9jKcE+Qw6eqmvrp9PQeWv9cg+X6l7GsiKyBFBi16oY0YpJbtRSBsirQJKuOBUiDgC X-Received: by 10.68.125.164 with SMTP id mr4mr55978539pbb.27.1392273801900; Wed, 12 Feb 2014 22:43:21 -0800 (PST) Received: from linaro.sisodomain.com ([115.113.119.130]) by mx.google.com with ESMTPSA id nv7sm2893781pbc.31.2014.02.12.22.43.18 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 12 Feb 2014 22:43:20 -0800 (PST) From: Sachin Kamat To: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: mark.rutland@arm.com, sbkim73@samsung.com, lee.jones@linaro.org, broonie@kernel.org, sachin.kamat@linaro.org Subject: [PATCH v3 3/3] Documentation: mfd: Add binding document for S2MPA01 Date: Thu, 13 Feb 2014 12:07:56 +0530 Message-Id: <1392273476-32736-3-git-send-email-sachin.kamat@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1392273476-32736-1-git-send-email-sachin.kamat@linaro.org> References: <1392273476-32736-1-git-send-email-sachin.kamat@linaro.org> 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 Acked-by: Mark Brown --- Changes since v2: * Re-worded as suggested by Mark Rutland --- Documentation/devicetree/bindings/mfd/s2mpa01.txt | 90 +++++++++++++++++++++ 1 file changed, 90 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..c13d3d8c3947 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/s2mpa01.txt @@ -0,0 +1,90 @@ + +* 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: An interrupt specifier for the sole interrupt generated by the + device. + +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: ramp delay in uV/us. May be 6250, 12500 + (default), 25000, or 50000. May be 0 for disabling the ramp delay on + BUCK{1,2,3,4}. + + 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=. + + The following BUCKs share ramp settings: + * 1 and 6 + * 2 and 4 + * 8, 9, and 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>; + }; + }; + };