From patchwork Thu Jan 9 11:22:34 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sachin Kamat X-Patchwork-Id: 23004 Return-Path: X-Original-To: linaro@patches.linaro.org Delivered-To: linaro@patches.linaro.org Received: from mail-pa0-f70.google.com (mail-pa0-f70.google.com [209.85.220.70]) by ip-10-151-82-157.ec2.internal (Postfix) with ESMTPS id 2C259202E2 for ; Thu, 9 Jan 2014 11:26:48 +0000 (UTC) Received: by mail-pa0-f70.google.com with SMTP id fa1sf7439377pad.1 for ; Thu, 09 Jan 2014 03:26:47 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:delivered-to:from:to:cc:subject :date:message-id:in-reply-to:references:x-original-sender :x-original-authentication-results:precedence:mailing-list:list-id :list-post:list-help:list-archive:list-unsubscribe; bh=uHQVhs26AUfecnRidVQ0vrlByvHmHzv68nqVYEFrMJA=; b=jgSQ+IaqOJENPFkfKCrpz24HHxS5DBCjAodWFxZR+UTyIk9a1NF/h0oqworWTgY7Br 8EUeeoGd4hOAICxq8gwYzb/VqiWesI6/+D+XovpzYZQYl+Hzrm4RfTiQET/gM0Rc+W3j QO8p4U2NS6zFw/R1J7gN272kVO+tJjmMtitf3TetQBAlUCz9j/OuDN1x6mY3fhe9+9kf I0nEwBSiq3J2sxJLWOsMLIhFiisxQ1dUOiq7vFViNupoObMS2Zrvrvi4Z15K+zn/9esL jsh+H2lBa56Hp4xZkbRdSdiAhQgXg/MQkF1WlYsCzBVqAeSjW+Qdl9YEchZBZrfzFHMl RzxA== X-Gm-Message-State: ALoCoQl5qvh6ztwX6lwCa0dTUPhpwLmo80Us6u7AahkdF+CDi163PxhmIRIpcwaiGl8mieKCt+oS X-Received: by 10.66.142.11 with SMTP id rs11mr862713pab.37.1389266807342; Thu, 09 Jan 2014 03:26:47 -0800 (PST) MIME-Version: 1.0 X-BeenThere: patchwork-forward@linaro.org Received: by 10.49.39.102 with SMTP id o6ls1093508qek.28.gmail; Thu, 09 Jan 2014 03:26:47 -0800 (PST) X-Received: by 10.58.255.195 with SMTP id as3mr504207ved.50.1389266807233; Thu, 09 Jan 2014 03:26:47 -0800 (PST) Received: from mail-ve0-f178.google.com (mail-ve0-f178.google.com [209.85.128.178]) by mx.google.com with ESMTPS id kv9si2663967vec.62.2014.01.09.03.26.47 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 09 Jan 2014 03:26:47 -0800 (PST) Received-SPF: neutral (google.com: 209.85.128.178 is neither permitted nor denied by best guess record for domain of patch+caf_=patchwork-forward=linaro.org@linaro.org) client-ip=209.85.128.178; Received: by mail-ve0-f178.google.com with SMTP id c14so2292273vea.9 for ; Thu, 09 Jan 2014 03:26:47 -0800 (PST) X-Received: by 10.52.175.6 with SMTP id bw6mr933731vdc.48.1389266807105; Thu, 09 Jan 2014 03:26:47 -0800 (PST) X-Forwarded-To: patchwork-forward@linaro.org X-Forwarded-For: patch@linaro.org patchwork-forward@linaro.org Delivered-To: patches@linaro.org Received: by 10.59.13.131 with SMTP id ey3csp5729ved; Thu, 9 Jan 2014 03:26:46 -0800 (PST) X-Received: by 10.68.239.230 with SMTP id vv6mr3162744pbc.34.1389266806056; Thu, 09 Jan 2014 03:26:46 -0800 (PST) Received: from mail-pd0-f181.google.com (mail-pd0-f181.google.com [209.85.192.181]) by mx.google.com with ESMTPS id m8si3648617pbq.239.2014.01.09.03.26.45 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 09 Jan 2014 03:26:46 -0800 (PST) Received-SPF: neutral (google.com: 209.85.192.181 is neither permitted nor denied by best guess record for domain of sachin.kamat@linaro.org) client-ip=209.85.192.181; Received: by mail-pd0-f181.google.com with SMTP id p10so3066985pdj.12 for ; Thu, 09 Jan 2014 03:26:45 -0800 (PST) X-Received: by 10.66.146.229 with SMTP id tf5mr3175650pab.50.1389266805603; Thu, 09 Jan 2014 03:26:45 -0800 (PST) Received: from linaro.sisodomain.com ([115.113.119.130]) by mx.google.com with ESMTPSA id pq1sm9254029pbc.8.2014.01.09.03.26.42 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 09 Jan 2014 03:26:45 -0800 (PST) From: Sachin Kamat To: linux-kernel@vger.kernel.org Cc: devicetree@vger.kernel.org, mark.rutland@arm.com, sbkim73@samsung.com, lee.jones@linaro.org, lgirdwood@gmail.com, broonie@kernel.org, sachin.kamat@linaro.org, patches@linaro.org Subject: [PATCH v2 3/3] Documentation: mfd: Add binding document for S2MPA01 Date: Thu, 9 Jan 2014 16:52:34 +0530 Message-Id: <1389266554-23463-3-git-send-email-sachin.kamat@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1389266554-23463-1-git-send-email-sachin.kamat@linaro.org> References: <1389266554-23463-1-git-send-email-sachin.kamat@linaro.org> X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: sachin.kamat@linaro.org X-Original-Authentication-Results: mx.google.com; spf=neutral (google.com: 209.85.128.178 is neither permitted nor denied by best guess record for domain of patch+caf_=patchwork-forward=linaro.org@linaro.org) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Precedence: list Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org List-ID: X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , 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>; + }; + }; + };