From patchwork Tue Sep 27 10:12:48 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rajendra Nayak X-Patchwork-Id: 4363 Return-Path: X-Original-To: patchwork@peony.canonical.com Delivered-To: patchwork@peony.canonical.com Received: from fiordland.canonical.com (fiordland.canonical.com [91.189.94.145]) by peony.canonical.com (Postfix) with ESMTP id C0C5223EFA for ; Tue, 27 Sep 2011 10:13:30 +0000 (UTC) Received: from mail-fx0-f52.google.com (mail-fx0-f52.google.com [209.85.161.52]) by fiordland.canonical.com (Postfix) with ESMTP id B4F41A18065 for ; Tue, 27 Sep 2011 10:13:30 +0000 (UTC) Received: by mail-fx0-f52.google.com with SMTP id 23so9690167fxe.11 for ; Tue, 27 Sep 2011 03:13:30 -0700 (PDT) Received: by 10.223.63.8 with SMTP id z8mr12161780fah.84.1317118410632; Tue, 27 Sep 2011 03:13:30 -0700 (PDT) X-Forwarded-To: linaro-patchwork@canonical.com X-Forwarded-For: patch@linaro.org linaro-patchwork@canonical.com Delivered-To: patches@linaro.org Received: by 10.152.3.234 with SMTP id f10cs67260laf; Tue, 27 Sep 2011 03:13:30 -0700 (PDT) Received: by 10.150.163.5 with SMTP id l5mr7233607ybe.83.1317118406999; Tue, 27 Sep 2011 03:13:26 -0700 (PDT) Received: from devils.ext.ti.com (devils.ext.ti.com. [198.47.26.153]) by mx.google.com with ESMTPS id b18si11480929ybj.52.2011.09.27.03.13.26 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 27 Sep 2011 03:13:26 -0700 (PDT) Received-SPF: pass (google.com: domain of rnayak@ti.com designates 198.47.26.153 as permitted sender) client-ip=198.47.26.153; Authentication-Results: mx.google.com; spf=pass (google.com: domain of rnayak@ti.com designates 198.47.26.153 as permitted sender) smtp.mail=rnayak@ti.com Received: from dbdp20.itg.ti.com ([172.24.170.38]) by devils.ext.ti.com (8.13.7/8.13.7) with ESMTP id p8RADMvB017511 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 27 Sep 2011 05:13:24 -0500 Received: from dbde70.ent.ti.com (localhost [127.0.0.1]) by dbdp20.itg.ti.com (8.13.8/8.13.8) with ESMTP id p8RADM6R024598; Tue, 27 Sep 2011 15:43:22 +0530 (IST) Received: from dbdp31.itg.ti.com (172.24.170.98) by DBDE70.ent.ti.com (172.24.170.148) with Microsoft SMTP Server id 8.3.106.1; Tue, 27 Sep 2011 15:43:22 +0530 Received: from ula0131687.apr.dhcp.ti.com (ula0131687-172024137082.apr.dhcp.ti.com [172.24.137.82]) by dbdp31.itg.ti.com (8.13.8/8.13.8) with ESMTP id p8RAD81M019725; Tue, 27 Sep 2011 15:43:21 +0530 (IST) From: Rajendra Nayak To: , CC: , , , , , , , Rajendra Nayak Subject: [PATCH 5/9] regulator: helper routine to extract fixed_voltage_config Date: Tue, 27 Sep 2011 15:42:48 +0530 Message-ID: <1317118372-17052-6-git-send-email-rnayak@ti.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1317118372-17052-1-git-send-email-rnayak@ti.com> References: <1317118372-17052-1-git-send-email-rnayak@ti.com> MIME-Version: 1.0 The helper routine of_get_fixed_voltage_config() extracts fixed_voltage_config structure contents from device tree. Also add documenation for additional bindings for fixed regulators that can be passed through dt. Signed-off-by: Rajendra Nayak --- .../bindings/regulator/fixed-regulator.txt | 24 +++++++++++++ drivers/regulator/fixed.c | 36 ++++++++++++++++++++ include/linux/regulator/fixed.h | 6 ++-- 3 files changed, 63 insertions(+), 3 deletions(-) create mode 100644 Documentation/devicetree/bindings/regulator/fixed-regulator.txt diff --git a/Documentation/devicetree/bindings/regulator/fixed-regulator.txt b/Documentation/devicetree/bindings/regulator/fixed-regulator.txt new file mode 100644 index 0000000..a204cbd --- /dev/null +++ b/Documentation/devicetree/bindings/regulator/fixed-regulator.txt @@ -0,0 +1,24 @@ +Fixed Voltage regulators + +Required properties: +- compatible: Must be "regulator-fixed"; + +Optional properties: +- regulator-fixed-supply: Name of the regulator supply +- regulator-fixed-microvolts: Output voltage of regulator +- regulator-fixed-gpio: gpio to use for enable control +- regulator-fixed-startup-delay: startup time in microseconds +- regulator-fixed-enable-high: Polarity of enable GPIO, 1 = Active High, 0 = Active low +- regulator-fixed-enabled-at-boot: 1 = yes, 0 = no + +Example: + + abc: fixedregulator@0 { + compatible = "regulator-fixed"; + regulator-fixed-supply = "fixed-supply"; + regulator-fixed-microvolts = <1800000>; + regulator-fixed-gpio = <43>; + regulator-fixed-startup-delay = <70000>; + regulator-fixed-enable-high; + regulator-fixed-enabled-at-boot; + }; diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c index 2fe9d99..c09f791 100644 --- a/drivers/regulator/fixed.c +++ b/drivers/regulator/fixed.c @@ -26,6 +26,8 @@ #include #include #include +#include +#include struct fixed_voltage_data { struct regulator_desc desc; @@ -37,6 +39,40 @@ struct fixed_voltage_data { bool is_enabled; }; + +/** + * of_get_fixed_voltage_config - extract fixed_voltage_config structure info + * @dev: device requesting for fixed_voltage_config + * + * Populates fixed_voltage_config structure by extracting data from device + * tree node, returns a pointer to the populated structure of NULL if memory + * alloc fails. + */ +struct fixed_voltage_config *of_get_fixed_voltage_config(struct device *dev) +{ + struct fixed_voltage_config *config; + struct device_node *np = dev->of_node; + + config = devm_kzalloc(dev, sizeof(struct fixed_voltage_config), GFP_KERNEL); + if (!config) + return NULL; + + config->supply_name = (char *)of_get_property(np, + "regulator-fixed-supply", NULL); + of_property_read_u32(np, "regulator-fixed-microvolts", + &config->microvolts); + of_property_read_u32(np, "regulator-fixed-gpio", &config->gpio); + of_property_read_u32(np, "regulator-fixed-startup-delay", + &config->startup_delay); + if (of_find_property(np, "regulator-fixed-enable-high", NULL)) + config->enable_high = true; + if (of_find_property(np, "regulator-fixed-enabled-at-boot", NULL)) + config->enabled_at_boot = true; + config->init_data = of_get_regulator_init_data(dev); + + return config; +} + static int fixed_voltage_is_enabled(struct regulator_dev *dev) { struct fixed_voltage_data *data = rdev_get_drvdata(dev); diff --git a/include/linux/regulator/fixed.h b/include/linux/regulator/fixed.h index ffd7d50..bb762cf 100644 --- a/include/linux/regulator/fixed.h +++ b/include/linux/regulator/fixed.h @@ -40,9 +40,9 @@ struct regulator_init_data; */ struct fixed_voltage_config { const char *supply_name; - int microvolts; - int gpio; - unsigned startup_delay; + u32 microvolts; + u32 gpio; + u32 startup_delay; unsigned enable_high:1; unsigned enabled_at_boot:1; struct regulator_init_data *init_data;