From patchwork Wed Mar 14 02:29:12 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Liu X-Patchwork-Id: 7274 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 78CDA23E0E for ; Wed, 14 Mar 2012 02:29:26 +0000 (UTC) Received: from mail-ob0-f180.google.com (mail-ob0-f180.google.com [209.85.214.180]) by fiordland.canonical.com (Postfix) with ESMTP id 1AAD0A1866A for ; Wed, 14 Mar 2012 02:29:25 +0000 (UTC) Received: by obbwd18 with SMTP id wd18so657obb.11 for ; Tue, 13 Mar 2012 19:29:25 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-forwarded-to:x-forwarded-for:delivered-to:received-spf:from:to:cc :subject:date:message-id:x-mailer:x-gm-message-state; bh=ssMjaQJHErP5Jwg6KgA/54rFV+NVOpJqdZSfMWYMPcI=; b=DVFt5zVbrMOdVYsfYsBPB4ufQWanCWRjPtSneYtjX8O91eiyQh+SrTn9unS6QIa5jE dFaN3IogA+yNB+RZjA9zb0dQYczPf+ZpxcqApYolim1oOwdaltxvJctn24U5+1I+GvfP Kvv1JPyxgWHDiCPeu5pEzpjlYrR5KSC9cyJtagLWXETHqbnBDvDvyrRblFqsW/hZOtmZ E2VLHEfQC+yhUy+gndTpwc8H0nbaAm9WbO8Zi5dkkD84t/Dh1275HvtV7hZwQAWSL5HK S6+JeqXRms/C+t3Kj/hS1JOAliAtG1AoSLtX6JuwQ8pWtLfb3bJxwIymKETG+DFct55I uzUg== Received: by 10.50.156.225 with SMTP id wh1mr4839681igb.0.1331692165176; Tue, 13 Mar 2012 19:29:25 -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 10.231.53.18 with SMTP id k18csp182ibg; Tue, 13 Mar 2012 19:29:24 -0700 (PDT) Received: by 10.236.181.233 with SMTP id l69mr1016407yhm.32.1331692163468; Tue, 13 Mar 2012 19:29:23 -0700 (PDT) Received: from mail-yx0-f178.google.com (mail-yx0-f178.google.com [209.85.213.178]) by mx.google.com with ESMTPS id v1si970123ank.136.2012.03.13.19.29.22 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 13 Mar 2012 19:29:23 -0700 (PDT) Received-SPF: neutral (google.com: 209.85.213.178 is neither permitted nor denied by best guess record for domain of paul.liu@linaro.org) client-ip=209.85.213.178; Authentication-Results: mx.google.com; spf=neutral (google.com: 209.85.213.178 is neither permitted nor denied by best guess record for domain of paul.liu@linaro.org) smtp.mail=paul.liu@linaro.org Received: by yenm14 with SMTP id m14so1642193yen.37 for ; Tue, 13 Mar 2012 19:29:22 -0700 (PDT) Received: by 10.60.22.163 with SMTP id e3mr948448oef.34.1331692162231; Tue, 13 Mar 2012 19:29:22 -0700 (PDT) Received: from freya.lan (host-77.138-185-111.static.totalbb.net.tw. [111.185.138.77]) by mx.google.com with ESMTPS id dt7sm484236obb.21.2012.03.13.19.29.17 (version=SSLv3 cipher=OTHER); Tue, 13 Mar 2012 19:29:20 -0700 (PDT) From: "Ying-Chun Liu (PaulLiu)" To: linux-arm-kernel@lists.infradead.org Cc: patches@linaro.org, linux-kernel@vger.kernel.org, linaro-dev@lists.linaro.org, "Ying-Chun Liu (PaulLiu)" , Nancy Chen , Mark Brown , Liam Girdwood , Samuel Ortiz , Jean-Christophe PLAGNIOL-VILLARD Subject: [PATCH v13] Regulator: Add Anatop regulator driver Date: Wed, 14 Mar 2012 10:29:12 +0800 Message-Id: <1331692152-9256-1-git-send-email-paul.liu@linaro.org> X-Mailer: git-send-email 1.7.9.1 X-Gm-Message-State: ALoCoQlwCmetOg73pp3L5V0i2ftBSYW3p57/7+Q2vbKqer7dua4IOa2HcwWJkAuUBIZgLW+F/RzO From: "Ying-Chun Liu (PaulLiu)" Anatop is an integrated regulator inside i.MX6 SoC. There are 3 digital regulators which controls PU, CORE (ARM), and SOC. And 3 analog regulators which controls 1P1, 2P5, 3P0 (USB). This patch adds the Anatop regulator driver. Signed-off-by: Nancy Chen Signed-off-by: Ying-Chun Liu (PaulLiu) Acked-by: Shawn Guo Reviewed-by: Axel Lin Cc: Mark Brown Cc: Liam Girdwood Cc: Samuel Ortiz Cc: Jean-Christophe PLAGNIOL-VILLARD --- drivers/regulator/Kconfig | 8 + drivers/regulator/Makefile | 1 + drivers/regulator/anatop-regulator.c | 241 ++++++++++++++++++++++++++++++++++ 3 files changed, 250 insertions(+), 0 deletions(-) create mode 100644 drivers/regulator/anatop-regulator.c diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index c733df5..a229de9 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -102,6 +102,14 @@ config REGULATOR_DA9052 This driver supports the voltage regulators of DA9052-BC and DA9053-AA/Bx PMIC. +config REGULATOR_ANATOP + tristate "Freescale i.MX on-chip ANATOP LDO regulators" + depends on MFD_ANATOP + help + Say y here to support Freescale i.MX on-chip ANATOP LDOs + regulators. It is recommended that this option be + enabled on i.MX6 platform. + config REGULATOR_MC13XXX_CORE tristate diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index cf0934b..ab06474 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -15,6 +15,7 @@ obj-$(CONFIG_REGULATOR_AAT2870) += aat2870-regulator.o obj-$(CONFIG_REGULATOR_AB3100) += ab3100.o obj-$(CONFIG_REGULATOR_AB8500) += ab8500.o obj-$(CONFIG_REGULATOR_AD5398) += ad5398.o +obj-$(CONFIG_REGULATOR_ANATOP) += anatop-regulator.o obj-$(CONFIG_REGULATOR_BQ24022) += bq24022.o obj-$(CONFIG_REGULATOR_DA903X) += da903x.o obj-$(CONFIG_REGULATOR_DA9052) += da9052-regulator.o diff --git a/drivers/regulator/anatop-regulator.c b/drivers/regulator/anatop-regulator.c new file mode 100644 index 0000000..17499a5 --- /dev/null +++ b/drivers/regulator/anatop-regulator.c @@ -0,0 +1,241 @@ +/* + * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct anatop_regulator { + const char *name; + u32 control_reg; + struct anatop *mfd; + int vol_bit_shift; + int vol_bit_width; + int min_bit_val; + int min_voltage; + int max_voltage; + struct regulator_desc rdesc; + struct regulator_init_data *initdata; +}; + +static int anatop_set_voltage(struct regulator_dev *reg, int min_uV, + int max_uV, unsigned *selector) +{ + struct anatop_regulator *anatop_reg = rdev_get_drvdata(reg); + u32 val, sel; + int uv; + + uv = min_uV; + dev_dbg(®->dev, "%s: uv %d, min %d, max %d\n", __func__, + uv, anatop_reg->min_voltage, + anatop_reg->max_voltage); + + if (uv < anatop_reg->min_voltage) { + if (max_uV > anatop_reg->min_voltage) + uv = anatop_reg->min_voltage; + else + return -EINVAL; + } + + if (!anatop_reg->control_reg) + return -ENOTSUPP; + + sel = DIV_ROUND_UP(uv - anatop_reg->min_voltage, 25000); + if (sel * 25000 + anatop_reg->min_voltage > anatop_reg->max_voltage) + return -EINVAL; + val = anatop_reg->min_bit_val + sel; + *selector = sel; + dev_dbg(®->dev, "%s: calculated val %d\n", __func__, val); + anatop_set_bits(anatop_reg->mfd, + anatop_reg->control_reg, + anatop_reg->vol_bit_shift, + anatop_reg->vol_bit_width, + val); + + return 0; +} + +static int anatop_get_voltage_sel(struct regulator_dev *reg) +{ + struct anatop_regulator *anatop_reg = rdev_get_drvdata(reg); + u32 val; + + if (!anatop_reg->control_reg) + return -ENOTSUPP; + + val = anatop_get_bits(anatop_reg->mfd, + anatop_reg->control_reg, + anatop_reg->vol_bit_shift, + anatop_reg->vol_bit_width); + + return val - anatop_reg->min_bit_val; +} + +static int anatop_list_voltage(struct regulator_dev *reg, unsigned selector) +{ + struct anatop_regulator *anatop_reg = rdev_get_drvdata(reg); + int uv; + + uv = anatop_reg->min_voltage + selector * 25000; + dev_dbg(®->dev, "vddio = %d, selector = %u\n", uv, selector); + + return uv; +} + +static struct regulator_ops anatop_rops = { + .set_voltage = anatop_set_voltage, + .get_voltage_sel = anatop_get_voltage_sel, + .list_voltage = anatop_list_voltage, +}; + +static int __devinit anatop_regulator_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct regulator_desc *rdesc; + struct regulator_dev *rdev; + struct anatop_regulator *sreg; + struct regulator_init_data *initdata; + struct anatop *anatopmfd = dev_get_drvdata(pdev->dev.parent); + int ret = 0; + + initdata = of_get_regulator_init_data(dev, np); + sreg = devm_kzalloc(dev, sizeof(*sreg), GFP_KERNEL); + if (!sreg) + return -ENOMEM; + sreg->initdata = initdata; + sreg->name = kstrdup(of_get_property(np, "regulator-name", NULL), + GFP_KERNEL); + rdesc = &sreg->rdesc; + memset(rdesc, 0, sizeof(*rdesc)); + rdesc->name = sreg->name; + rdesc->ops = &anatop_rops; + rdesc->type = REGULATOR_VOLTAGE; + rdesc->owner = THIS_MODULE; + sreg->mfd = anatopmfd; + ret = of_property_read_u32(np, "reg", &sreg->control_reg); + if (ret) { + dev_err(dev, "no reg property set\n"); + goto anatop_probe_end; + } + ret = of_property_read_u32(np, "anatop-vol-bit-width", + &sreg->vol_bit_width); + if (ret) { + dev_err(dev, "no anatop-vol-bit-width property set\n"); + goto anatop_probe_end; + } + ret = of_property_read_u32(np, "anatop-vol-bit-shift", + &sreg->vol_bit_shift); + if (ret) { + dev_err(dev, "no anatop-vol-bit-shift property set\n"); + goto anatop_probe_end; + } + ret = of_property_read_u32(np, "anatop-min-bit-val", + &sreg->min_bit_val); + if (ret) { + dev_err(dev, "no anatop-min-bit-val property set\n"); + goto anatop_probe_end; + } + ret = of_property_read_u32(np, "anatop-min-voltage", + &sreg->min_voltage); + if (ret) { + dev_err(dev, "no anatop-min-voltage property set\n"); + goto anatop_probe_end; + } + ret = of_property_read_u32(np, "anatop-max-voltage", + &sreg->max_voltage); + if (ret) { + dev_err(dev, "no anatop-max-voltage property set\n"); + goto anatop_probe_end; + } + + rdesc->n_voltages = (sreg->max_voltage - sreg->min_voltage) + / 25000 + 1; + + /* register regulator */ + rdev = regulator_register(rdesc, dev, + initdata, sreg, pdev->dev.of_node); + if (IS_ERR(rdev)) { + dev_err(dev, "failed to register %s\n", + rdesc->name); + ret = PTR_ERR(rdev); + goto anatop_probe_end; + } + + platform_set_drvdata(pdev, rdev); + +anatop_probe_end: + if (ret) + kfree(sreg->name); + + return ret; +} + +static int __devexit anatop_regulator_remove(struct platform_device *pdev) +{ + struct regulator_dev *rdev = platform_get_drvdata(pdev); + struct anatop_regulator *sreg = rdev_get_drvdata(rdev); + const char *name = sreg->name; + + regulator_unregister(rdev); + kfree(name); + + return 0; +} + +static struct of_device_id __devinitdata of_anatop_regulator_match_tbl[] = { + { .compatible = "fsl,anatop-regulator", }, + { /* end */ } +}; + +static struct platform_driver anatop_regulator = { + .driver = { + .name = "anatop_regulator", + .owner = THIS_MODULE, + .of_match_table = of_anatop_regulator_match_tbl, + }, + .probe = anatop_regulator_probe, + .remove = anatop_regulator_remove, +}; + +static int __init anatop_regulator_init(void) +{ + return platform_driver_register(&anatop_regulator); +} +postcore_initcall(anatop_regulator_init); + +static void __exit anatop_regulator_exit(void) +{ + platform_driver_unregister(&anatop_regulator); +} +module_exit(anatop_regulator_exit); + +MODULE_AUTHOR("Nancy Chen , " + "Ying-Chun Liu (PaulLiu) "); +MODULE_DESCRIPTION("ANATOP Regulator driver"); +MODULE_LICENSE("GPL v2");