From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754281AbbAWFGS (ORCPT ); Fri, 23 Jan 2015 00:06:18 -0500 Received: from mailout1.samsung.com ([203.254.224.24]:23252 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751059AbbAWFDK (ORCPT ); Fri, 23 Jan 2015 00:03:10 -0500 X-AuditID: cbfee68f-f791c6d000004834-d3-54c1d606d332 From: Jaewon Kim To: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-pm@vger.kernel.org Cc: Inki Dae , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Lee Jones , Chanwoo Choi , Sebastian Reichel , Mark Brown , Beomho Seo , Jaewon Kim Subject: [PATCH 5/6] regulator: max77843: Add max77843 regulator driver Date: Fri, 23 Jan 2015 14:02:46 +0900 Message-id: <1421989367-32721-6-git-send-email-jaewon02.kim@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1421989367-32721-1-git-send-email-jaewon02.kim@samsung.com> References: <1421989367-32721-1-git-send-email-jaewon02.kim@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFupmkeLIzCtJLcpLzFFi42JZI2JSqMt27WCIweHtChanP21jt5j68Amb xfUvz1kt5h85x2rR/2Yhq8W5VysZLSbdn8BisaPhCKvF/a9HGS0u75rDZvG59wijxdLrF5ks Jkxfy2LRuvcIu8Xp3SUO/B5r5q1h9Ljc18vksXL5FzaPTas62TzuXNvD5tG3ZRWjx+dNcgHs UVw2Kak5mWWpRfp2CVwZi/btZCqY4VUxf8pClgbGVbZdjJwcEgImEkf/v2SDsMUkLtxbD2Rz cQgJLGWU6Dx2gg2maOm3Y6wQiemMEnM23maHcNqYJDo+LGQHqWIT0Jb4vn4xK4gtIhAh8fzj SmaQImaBg8wSHRdPAxVxcAgLuEt83s0CUsMioCpx72Av2AZeAQ+Jfx8uMYGUSAgoSMyZZAMS 5hTwlHi35wVYiRBQyeoJJ1kgDnrELvH/vh3EGAGJb5MPsUC0ykpsOsAMUSIpcXDFDZYJjMIL GBlWMYqmFiQXFCelFxnrFSfmFpfmpesl5+duYgTG0el/z/p3MN49YH2IUYCDUYmHt2HLwRAh 1sSy4srcQ4ymQBsmMkuJJucDozWvJN7Q2MzIwtTE1NjI3NJMSZx3odTPYCGB9MSS1OzU1ILU ovii0pzU4kOMTBycUg2MG4tvr16bwTk5aefr3tlpLOV+29d9P8v01KvIz22xx7uNOo4+4v91 vb7c1L32nstT9UAOi83ff73nZn95plG0q13UrvvPzdkXN2+61nyqYq7JnDTL2y9qTifF7BRw 3iClfvdrVr2c8jqfGbEKvV0fTjbKmVz7JGyXprH4bZ7jl3zBtRMZ/xxYr8RSnJFoqMVcVJwI ACmz78ieAgAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrGIsWRmVeSWpSXmKPExsVy+t9jQV22awdDDE59E7E4/Wkbu8XUh0/Y LK5/ec5qMf/IOVaL/jcLWS3OvVrJaDHp/gQWix0NR1gt7n89ymhxedccNovPvUcYLZZev8hk MWH6WhaL1r1H2C1O7y5x4PdYM28No8flvl4mj5XLv7B5bFrVyeZx59oeNo++LasYPT5vkgtg j2pgtMlITUxJLVJIzUvOT8nMS7dV8g6Od443NTMw1DW0tDBXUshLzE21VXLxCdB1y8wBOlxJ oSwxpxQoFJBYXKykb4dpQmiIm64FTGOErm9IEFyPkQEaSFjDmLFo306mghleFfOnLGRpYFxl 28XIySEhYCKx9NsxVghbTOLCvfVsXYxcHEIC0xkl5my8zQ7htDFJdHxYyA5SxSagLfF9/WKw DhGBCInnH1cygxQxCxxklui4eBqoiINDWMBd4vNuFpAaFgFViXsHe9lAbF4BD4l/Hy4xgZRI CChIzJlkAxLmFPCUeLfnBViJEFDJ6gknWSYw8i5gZFjFKJpakFxQnJSea6hXnJhbXJqXrpec n7uJERynz6R2MK5ssDjEKMDBqMTD27DlYIgQa2JZcWXuIUYJDmYlEd4nB4BCvCmJlVWpRfnx RaU5qcWHGE2BjprILCWanA9MIXkl8YbGJmZGlkbmhhZGxuZK4rxK9m0hQgLpiSWp2ampBalF MH1MHJxSDYz6PvnrrL5p5DZWnnPgj+C+8yRadd03odse/QrPzByPG924eU1tz4Tk2oAvn2Wu eHSW7Vma6tA5L2WXlPeHxFz/ubZbOZwDvvi0TWnb7Mo+2eXQvznGrMkrWPj92H6bW0Ye0zQo OLG+8YEwc4ncaT7n9PIXKzkSU7/fDf9S1iywij/F489GdyWW4oxEQy3mouJEAPExxtDpAgAA DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds new regulator driver to support max77843 MFD(Multi Function Device) chip`s regulators. The Max77843 has two voltage regulators for USB safeout. Cc: Mark Brown Signed-off-by: Beomho Seo Signed-off-by: Jaewon Kim --- drivers/regulator/Kconfig | 8 ++ drivers/regulator/Makefile | 1 + drivers/regulator/max77843.c | 259 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 268 insertions(+) create mode 100644 drivers/regulator/max77843.c diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index c3a60b5..c1f9c33 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -414,6 +414,14 @@ config REGULATOR_MAX77802 Exynos5420/Exynos5800 SoCs to control various voltages. It includes support for control of voltage and ramp speed. +config REGULATOR_MAX77843 + tristate "Maxim 77843 regulator" + depends on MFD_MAX77843 + help + This driver controls a Maxim 77843 regulator. + The regulator include two 'SAFEOUT' for USB(Universal Serial Bus) + This is suitable for Exynos5433 SoC chips. + config REGULATOR_MC13XXX_CORE tristate diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 1f28ebf..12408d6 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -55,6 +55,7 @@ obj-$(CONFIG_REGULATOR_MAX8998) += max8998.o obj-$(CONFIG_REGULATOR_MAX77686) += max77686.o obj-$(CONFIG_REGULATOR_MAX77693) += max77693.o obj-$(CONFIG_REGULATOR_MAX77802) += max77802.o +obj-$(CONFIG_REGULATOR_MAX77843) += max77843.o obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o obj-$(CONFIG_REGULATOR_MC13XXX_CORE) += mc13xxx-regulator-core.o diff --git a/drivers/regulator/max77843.c b/drivers/regulator/max77843.c new file mode 100644 index 0000000..86afc7a --- /dev/null +++ b/drivers/regulator/max77843.c @@ -0,0 +1,259 @@ +/* + * max77843.c - Regulator driver for the Maxim MAX77843 + * + * Copyright (C) 2014 Samsung Electrnoics + * Author: Jaewon Kim + * + * 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. + */ + +#include +#include +#include +#include +#include +#include + +#define MAX77843_SUPPORTED_VOLTAGE_NUM 4 + +enum max77843_regulator_type { + MAX77843_SAFEOUT1 = 0, + MAX77843_SAFEOUT2, + MAX77843_CHARGER, + + MAX77843_NUM, +}; + +static const unsigned int max77843_regulator_table[] = { + 4850000, + 4900000, + 4950000, + 3300000, +}; + +static int max77843_reg_is_enabled(struct regulator_dev *rdev) +{ + struct regmap *regmap = rdev->regmap; + int ret; + unsigned int reg; + + ret = regmap_read(regmap, rdev->desc->enable_reg, ®); + if (ret) { + dev_err(&rdev->dev, "Fialed to read charger register\n"); + return ret; + } + + return (reg & rdev->desc->enable_mask) == rdev->desc->enable_mask; +} + +static int max77843_reg_get_current_limit(struct regulator_dev *rdev) +{ + struct regmap *regmap = rdev->regmap; + unsigned int chg_min_uA = rdev->constraints->min_uA; + unsigned int chg_max_uA = rdev->constraints->max_uA; + unsigned int val; + int ret; + unsigned int reg, sel; + + ret = regmap_read(regmap, MAX77843_CHG_REG_CHG_CNFG_02, ®); + if (ret) { + dev_err(&rdev->dev, "Failed to read charger register\n"); + return ret; + } + + sel = reg & MAX77843_CHG_FAST_CHG_CURRENT_MASK; + + if (sel < 0x03) + sel = 0; + else + sel -= 2; + + val = chg_min_uA + MAX77843_CHG_FAST_CHG_CURRENT_STEP * sel; + if (val > chg_max_uA) + return -EINVAL; + + return val; +} + +static int max77843_reg_set_current_limit(struct regulator_dev *rdev, + int min_uA, int max_uA) +{ + struct regmap *regmap = rdev->regmap; + unsigned int chg_min_uA = rdev->constraints->min_uA; + int sel = 0; + + while (chg_min_uA + MAX77843_CHG_FAST_CHG_CURRENT_STEP * sel < min_uA) + sel++; + + if (chg_min_uA + MAX77843_CHG_FAST_CHG_CURRENT_STEP * sel > max_uA) + return -EINVAL; + + sel += 2; + + return regmap_write(regmap, MAX77843_CHG_REG_CHG_CNFG_02, sel); +} + +static struct regulator_ops max77843_charger_ops = { + .is_enabled = max77843_reg_is_enabled, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .get_current_limit = max77843_reg_get_current_limit, + .set_current_limit = max77843_reg_set_current_limit, +}; + +static struct regulator_ops max77843_regulator_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .list_voltage = regulator_list_voltage_table, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, +}; + +static const struct regulator_desc max77843_supported_regulators[] = { + [MAX77843_SAFEOUT1] = { + .name = "SAFEOUT1", + .id = MAX77843_SAFEOUT1, + .ops = &max77843_regulator_ops, + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .n_voltages = MAX77843_SUPPORTED_VOLTAGE_NUM, + .volt_table = max77843_regulator_table, + .enable_reg = MAX77843_SYS_REG_SAFEOUTCTRL, + .enable_mask = MAX77843_REG_SAFEOUTCTRL_ENSAFEOUT1, + .vsel_reg = MAX77843_SYS_REG_SAFEOUTCTRL, + .vsel_mask = MAX77843_REG_SAFEOUTCTRL_SAFEOUT1_MASK, + }, + [MAX77843_SAFEOUT2] = { + .name = "SAFEOUT2", + .id = MAX77843_SAFEOUT2, + .ops = &max77843_regulator_ops, + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .n_voltages = MAX77843_SUPPORTED_VOLTAGE_NUM, + .volt_table = max77843_regulator_table, + .enable_reg = MAX77843_SYS_REG_SAFEOUTCTRL, + .enable_mask = MAX77843_REG_SAFEOUTCTRL_ENSAFEOUT2, + .vsel_reg = MAX77843_SYS_REG_SAFEOUTCTRL, + .vsel_mask = MAX77843_REG_SAFEOUTCTRL_SAFEOUT2_MASK, + }, + [MAX77843_CHARGER] = { + .name = "CHARGER", + .id = MAX77843_CHARGER, + .ops = &max77843_charger_ops, + .type = REGULATOR_CURRENT, + .owner = THIS_MODULE, + .enable_reg = MAX77843_CHG_REG_CHG_CNFG_00, + .enable_mask = MAX77843_CHG_MASK, + }, +}; + +static struct of_regulator_match max77843_regulator_matches[] = { + { .name = "SAFEOUT1", }, + { .name = "SAFEOUT2", }, + { .name = "CHARGER", }, +}; + +static struct regmap *max77843_get_regmap(struct max77843 *max77843, int reg_id) +{ + switch (reg_id) { + case MAX77843_SAFEOUT1: + case MAX77843_SAFEOUT2: + return max77843->regmap; + case MAX77843_CHARGER: + return max77843->regmap_chg; + default: + return max77843->regmap; + } +} + +static int max77843_regulator_dt_parse(struct platform_device *pdev) +{ + struct device_node *np; + int ret; + + np = of_get_child_by_name(pdev->dev.parent->of_node, "regulators"); + if (!np) { + dev_err(&pdev->dev, + "Cannot get child OF node for regulators\n"); + return -EINVAL; + } + + ret = of_regulator_match(&pdev->dev, np, max77843_regulator_matches, + ARRAY_SIZE(max77843_regulator_matches)); + if (ret < 0) { + dev_err(&pdev->dev, "Cannot parsing regulator init data\n"); + return ret; + } + + of_node_put(np); + + return 0; +} + +static int max77843_regulator_probe(struct platform_device *pdev) +{ + struct max77843 *max77843 = dev_get_drvdata(pdev->dev.parent); + struct regulator_config config = {}; + int i, ret; + + ret = max77843_regulator_dt_parse(pdev); + if (ret) { + dev_err(&pdev->dev, "Failed to parse device tree\n"); + return ret; + } + + config.dev = &pdev->dev; + config.driver_data = max77843; + + for (i = 0; i < ARRAY_SIZE(max77843_supported_regulators); i++) { + struct regulator_dev *regulator; + + config.init_data = max77843_regulator_matches[i].init_data; + config.of_node = max77843_regulator_matches[i].of_node; + config.regmap = max77843_get_regmap(max77843, + max77843_supported_regulators[i].id); + + regulator = devm_regulator_register(&pdev->dev, + &max77843_supported_regulators[i], &config); + if (IS_ERR(regulator)) { + dev_err(&pdev->dev, + "Failed to regiser regulator-%d\n", i); + return PTR_ERR(regulator); + } + } + + return 0; +} + +static const struct platform_device_id max77843_regulator_id[] = { + { "max77843-regulator", }, + { /* sentinel */ }, +}; + +static struct platform_driver max77843_regulator_driver = { + .driver = { + .name = "max77843-regulator", + }, + .probe = max77843_regulator_probe, + .id_table = max77843_regulator_id, +}; + +static int __init max77843_regulator_init(void) +{ + return platform_driver_register(&max77843_regulator_driver); +} +subsys_initcall(max77843_regulator_init); + +static void __exit max77843_regulator_exit(void) +{ + platform_driver_unregister(&max77843_regulator_driver); +} +module_exit(max77843_regulator_exit); + +MODULE_AUTHOR("Jaewon Kim "); +MODULE_DESCRIPTION("Maxim MAX77843 regulator driver"); +MODULE_LICENSE("GPL"); -- 1.7.9.5