From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756817AbbBEGjD (ORCPT ); Thu, 5 Feb 2015 01:39:03 -0500 Received: from mailout4.samsung.com ([203.254.224.34]:42700 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756783AbbBEGi4 (ORCPT ); Thu, 5 Feb 2015 01:38:56 -0500 X-AuditID: cbfee68e-f79b46d000002b74-65-54d30ffe5f49 From: Jaewon Kim To: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-pm@vger.kernel.org Cc: Inki Dae , SangBae Lee , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Lee Jones , Chanwoo Choi , Sebastian Reichel , Mark Brown , Beomho Seo , Jaewon Kim Subject: [PATCH v4] regulator: max77843: Add max77843 regulator driver Date: Thu, 05 Feb 2015 15:35:58 +0900 Message-id: <1423118158-7266-1-git-send-email-jaewon02.kim@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1423025771-4139-6-git-send-email-jaewon02.kim@samsung.com> References: <1423025771-4139-6-git-send-email-jaewon02.kim@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFupnkeLIzCtJLcpLzFFi42JZI2JSrPuP/3KIwZND/BanP21jt5j68Amb xfUvz1kt5h85x2rR/2Yhq8W5VysZLSbdn8BisaPhCKvF/a9HGS0u75rDZvG59wijxdLrF5ks Jkxfy2LRuvcIu8XxTwdZLE7vLnEQ8Fgzbw2jx+W+XiaPlcu/sHlsWtXJ5nHn2h42j74tqxg9 Pm+SC2CP4rJJSc3JLEst0rdL4Mr4uG0BS8FK14o1B1+yNDCesuxi5OSQEDCRON/yjw3CFpO4 cG89kM3FISSwlFHixqaFzDBFs671skMkpjNKfG65CFXVxiSxrGEqO0gVm4C2xPf1i1lBbBGB CInnH1eCdTMLvGGWeLwyGsQWFnCT+H7tOlANBweLgKrErlZ5kDCvgLvE5Kfn2UHCEgIKEnMm 2YCYnAIeEt/WG4FUCAFVLH90GmyrhMBLdokTj6aygCRYBAQkvk0+xALRKiux6QDUyZISB1fc YJnAKLyAkWEVo2hqQXJBcVJ6kZFecWJucWleul5yfu4mRmA8nf73rG8H480D1ocYBTgYlXh4 LfZdChFiTSwrrsw9xGgKtGEis5Rocj4wavNK4g2NzYwsTE1MjY3MLc2UxHkTpH4GCwmkJ5ak ZqemFqQWxReV5qQWH2Jk4uCUamD0/PN9r+j3igNuGu2vRc/Pia+8znd1I+McBYswsQ7XS/xz dK65cVuHy9o7SLUaHjM7fXtbvWia3AGFhBf3VwbLzc3ICTzmOl0l0kx0VvT6k8F9zycKSjyc ynL4yav9wUcD5v5J4/o/gbXa86KDnGf9Gv7o3C1sVm94el52q5Wvi5xo+KxHUUWJpTgj0VCL uag4EQBI/I4WogIAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrJIsWRmVeSWpSXmKPExsVy+t9jQd1//JdDDP4uZbE4/Wkbu8XUh0/Y LK5/ec5qMf/IOVaL/jcLWS3OvVrJaDHp/gQWix0NR1gt7n89ymhxedccNovPvUcYLZZev8hk MWH6WhaL1r1H2C2OfzoINGp3iYOAx5p5axg9Lvf1MnmsXP6FzWPTqk42jzvX9rB59G1Zxejx eZNcAHtUA6NNRmpiSmqRQmpecn5KZl66rZJ3cLxzvKmZgaGuoaWFuZJCXmJuqq2Si0+Arltm DtD1SgpliTmlQKGAxOJiJX07TBNCQ9x0LWAaI3R9Q4LgeowM0EDCGsaMj9sWsBSsdK1Yc/Al SwPjKcsuRk4OCQETiVnXetkhbDGJC/fWs3UxcnEICUxnlPjcchHKaWOSWNYwFayKTUBb4vv6 xawgtohAhMTzjyuZQWxmgTfMEo9XRoPYwgJuEt+vXQeq4eBgEVCV2NUqDxLmFXCXmPz0PDtI WEJAQWLOJBsQk1PAQ+LbeiOQCiGgiuWPTrNNYORdwMiwilE0tSC5oDgpPddIrzgxt7g0L10v OT93EyM4Wp9J72Bc1WBxiFGAg1GJh9di36UQIdbEsuLK3EOMEhzMSiK8mhyXQ4R4UxIrq1KL 8uOLSnNSiw8xmgKdNJFZSjQ5H5hI8kriDY1NzIwsjcwNLYyMzZXEeZXs20KEBNITS1KzU1ML Uotg+pg4OKUaGNntcx0nce9oYozdxbXKTX/9TKPAz0IbspeeuyEfXym1TqAo8klwmkSU1L0t 3oHiTzL0rUtCQpa2l69+eP6zbsE1xs6JJ9srsgKCmTOOWT3TrtH2l/p+61n16Q3Hdz23X7fB 97xM+JXoV+m/DNJPaxy5f/9F18PNp54/TOR7HxiQ9+2j6F4eRSWW4oxEQy3mouJEAIvdFnDs AgAA 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: Jaewon Kim Signed-off-by: Beomho Seo --- drivers/regulator/Kconfig | 8 ++ drivers/regulator/Makefile | 1 + drivers/regulator/max77843.c | 227 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 236 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..c132ef5 --- /dev/null +++ b/drivers/regulator/max77843.c @@ -0,0 +1,227 @@ +/* + * max77843.c - Regulator driver for the Maxim MAX77843 + * + * Copyright (C) 2015 Samsung Electronics + * Author: Jaewon Kim + * Author: Beomho Seo + * + * 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 + +enum max77843_regulator_type { + MAX77843_SAFEOUT1 = 0, + MAX77843_SAFEOUT2, + MAX77843_CHARGER, + + MAX77843_NUM, +}; + +static const unsigned int max77843_safeout_voltage_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, + .of_match = of_match_ptr("SAFEOUT1"), + .regulators_node = of_match_ptr("regulators"), + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .n_voltages = ARRAY_SIZE(max77843_safeout_voltage_table), + .volt_table = max77843_safeout_voltage_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, + .of_match = of_match_ptr("SAFEOUT2"), + .regulators_node = of_match_ptr("regulators"), + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .n_voltages = ARRAY_SIZE(max77843_safeout_voltage_table), + .volt_table = max77843_safeout_voltage_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, + .of_match = of_match_ptr("CHARGER"), + .regulators_node = of_match_ptr("regulators"), + .type = REGULATOR_CURRENT, + .owner = THIS_MODULE, + .enable_reg = MAX77843_CHG_REG_CHG_CNFG_00, + .enable_mask = MAX77843_CHG_MASK, + }, +}; + +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_probe(struct platform_device *pdev) +{ + struct max77843 *max77843 = dev_get_drvdata(pdev->dev.parent); + struct regulator_config config = {}; + int i; + + config.dev = max77843->dev; + config.driver_data = max77843; + + for (i = 0; i < ARRAY_SIZE(max77843_supported_regulators); i++) { + struct regulator_dev *regulator; + + 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_AUTHOR("Beomho Seo "); +MODULE_DESCRIPTION("Maxim MAX77843 regulator driver"); +MODULE_LICENSE("GPL"); -- 1.7.9.5