Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752658AbbKBFDJ (ORCPT ); Mon, 2 Nov 2015 00:03:09 -0500 Received: from devils.ext.ti.com ([198.47.26.153]:60324 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752078AbbKBFCg (ORCPT ); Mon, 2 Nov 2015 00:02:36 -0500 From: Milo Kim To: , , CC: Milo Kim , Mark Brown Subject: [PATCH 16/16] regulator: add LM363X driver Date: Mon, 2 Nov 2015 14:01:23 +0900 Message-ID: <1446440483-6948-17-git-send-email-milo.kim@ti.com> X-Mailer: git-send-email 1.9.5.msysgit.0 In-Reply-To: <1446440483-6948-16-git-send-email-milo.kim@ti.com> References: <1446440483-6948-1-git-send-email-milo.kim@ti.com> <1446440483-6948-2-git-send-email-milo.kim@ti.com> <1446440483-6948-3-git-send-email-milo.kim@ti.com> <1446440483-6948-4-git-send-email-milo.kim@ti.com> <1446440483-6948-5-git-send-email-milo.kim@ti.com> <1446440483-6948-6-git-send-email-milo.kim@ti.com> <1446440483-6948-7-git-send-email-milo.kim@ti.com> <1446440483-6948-8-git-send-email-milo.kim@ti.com> <1446440483-6948-9-git-send-email-milo.kim@ti.com> <1446440483-6948-10-git-send-email-milo.kim@ti.com> <1446440483-6948-11-git-send-email-milo.kim@ti.com> <1446440483-6948-12-git-send-email-milo.kim@ti.com> <1446440483-6948-13-git-send-email-milo.kim@ti.com> <1446440483-6948-14-git-send-email-milo.kim@ti.com> <1446440483-6948-15-git-send-email-milo.kim@ti.com> <1446440483-6948-16-git-send-email-milo.kim@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 13043 Lines: 416 LM363X regulator driver supports LM3631 and LM3632. LM3631 has 5 regulators. LM3632 provides 3 regulators. One boost output and LDOs are used for the display module. Boost voltage is configurable but always on. Supported operations for LDOs are enabled/disabled and voltage change. Two LDOs of LM3632 can be controlled by external pins. Those are described in the device tree bindings. Cc: Mark Brown Cc: Lee Jones Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Milo Kim --- drivers/regulator/Kconfig | 9 + drivers/regulator/Makefile | 1 + drivers/regulator/lm363x-regulator.c | 349 +++++++++++++++++++++++++++++++++++ 3 files changed, 359 insertions(+) create mode 100644 drivers/regulator/lm363x-regulator.c diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 64bccff..efac1eb 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -274,6 +274,15 @@ config REGULATOR_ISL6271A help This driver supports ISL6271A voltage regulator chip. +config REGULATOR_LM363X + tristate "TI LM363X voltage regulators" + depends on MFD_TI_LMU + help + This driver supports LM3631 and LM3632 voltage regulators for + the LCD bias. + One boost output voltage is configurable and always on. + Other LDOs are used for the display module. + config REGULATOR_LP3971 tristate "National Semiconductors LP3971 PMIC regulator driver" depends on I2C diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 0f81749..0ea87cd 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -36,6 +36,7 @@ obj-$(CONFIG_REGULATOR_GPIO) += gpio-regulator.o obj-$(CONFIG_REGULATOR_HI6421) += hi6421-regulator.o obj-$(CONFIG_REGULATOR_ISL6271A) += isl6271a-regulator.o obj-$(CONFIG_REGULATOR_ISL9305) += isl9305.o +obj-$(CONFIG_REGULATOR_LM363X) += lm363x-regulator.o obj-$(CONFIG_REGULATOR_LP3971) += lp3971.o obj-$(CONFIG_REGULATOR_LP3972) += lp3972.o obj-$(CONFIG_REGULATOR_LP872X) += lp872x.o diff --git a/drivers/regulator/lm363x-regulator.c b/drivers/regulator/lm363x-regulator.c new file mode 100644 index 0000000..28408d4 --- /dev/null +++ b/drivers/regulator/lm363x-regulator.c @@ -0,0 +1,349 @@ +/* + * TI LM363X Regulator Driver + * + * Copyright 2015 Texas Instruments + * + * Author: Milo Kim + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* LM3631 */ +#define LM3631_BOOST_VSEL_MAX 0x25 +#define LM3631_LDO_VSEL_MAX 0x28 +#define LM3631_CONT_VSEL_MAX 0x03 +#define LM3631_VBOOST_MIN 4500000 +#define LM3631_VCONT_MIN 1800000 +#define LM3631_VLDO_MIN 4000000 +#define ENABLE_TIME_USEC 1000 + +/* LM3632 */ +#define LM3632_BOOST_VSEL_MAX 0x26 +#define LM3632_LDO_VSEL_MAX 0x29 +#define LM3632_VBOOST_MIN 4500000 +#define LM3632_VLDO_MIN 4000000 + +/* Common */ +#define LM363X_STEP_50mV 50000 +#define LM363X_STEP_500mV 500000 + +struct lm363x_regulator { + struct ti_lmu *lmu; + struct regulator_dev *regulator; +}; + +const int ldo_cont_enable_time[] = { + 0, 2000, 5000, 10000, 20000, 50000, 100000, 200000, +}; + +static int lm363x_regulator_enable_time(struct regulator_dev *rdev) +{ + struct lm363x_regulator *lm363x_regulator = rdev_get_drvdata(rdev); + enum lm363x_regulator_id id = rdev_get_id(rdev); + u8 val, addr, mask; + + switch (id) { + case LM3631_LDO_CONT: + addr = LM3631_REG_ENTIME_VCONT; + mask = LM3631_ENTIME_CONT_MASK; + break; + case LM3631_LDO_OREF: + addr = LM3631_REG_ENTIME_VOREF; + mask = LM3631_ENTIME_MASK; + break; + case LM3631_LDO_POS: + addr = LM3631_REG_ENTIME_VPOS; + mask = LM3631_ENTIME_MASK; + break; + case LM3631_LDO_NEG: + addr = LM3631_REG_ENTIME_VNEG; + mask = LM3631_ENTIME_MASK; + break; + default: + return 0; + } + + if (ti_lmu_read_byte(lm363x_regulator->lmu, addr, &val)) + return -EINVAL; + + val = (val & mask) >> LM3631_ENTIME_SHIFT; + + if (id == LM3631_LDO_CONT) + return ldo_cont_enable_time[val]; + else + return ENABLE_TIME_USEC * val; +} + +static struct regulator_ops lm363x_boost_voltage_table_ops = { + .list_voltage = regulator_list_voltage_linear, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, +}; + +static struct regulator_ops lm363x_regulator_voltage_table_ops = { + .list_voltage = regulator_list_voltage_linear, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .enable_time = lm363x_regulator_enable_time, +}; + +static const struct regulator_desc lm363x_regulator_desc[] = { + /* LM3631 */ + { + .name = "vboost", + .id = LM3631_BOOST, + .ops = &lm363x_boost_voltage_table_ops, + .n_voltages = LM3631_BOOST_VSEL_MAX + 1, + .min_uV = LM3631_VBOOST_MIN, + .uV_step = LM363X_STEP_50mV, + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .vsel_reg = LM3631_REG_VOUT_BOOST, + .vsel_mask = LM3631_VOUT_MASK, + }, + { + .name = "ldo_cont", + .id = LM3631_LDO_CONT, + .ops = &lm363x_regulator_voltage_table_ops, + .n_voltages = LM3631_CONT_VSEL_MAX + 1, + .min_uV = LM3631_VCONT_MIN, + .uV_step = LM363X_STEP_500mV, + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .vsel_reg = LM3631_REG_VOUT_CONT, + .vsel_mask = LM3631_VOUT_CONT_MASK, + .enable_reg = LM3631_REG_LDO_CTRL2, + .enable_mask = LM3631_EN_CONT_MASK, + }, + { + .name = "ldo_oref", + .id = LM3631_LDO_OREF, + .ops = &lm363x_regulator_voltage_table_ops, + .n_voltages = LM3631_LDO_VSEL_MAX + 1, + .min_uV = LM3631_VLDO_MIN, + .uV_step = LM363X_STEP_50mV, + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .vsel_reg = LM3631_REG_VOUT_OREF, + .vsel_mask = LM3631_VOUT_MASK, + .enable_reg = LM3631_REG_LDO_CTRL1, + .enable_mask = LM3631_EN_OREF_MASK, + }, + { + .name = "ldo_vpos", + .id = LM3631_LDO_POS, + .ops = &lm363x_regulator_voltage_table_ops, + .n_voltages = LM3631_LDO_VSEL_MAX + 1, + .min_uV = LM3631_VLDO_MIN, + .uV_step = LM363X_STEP_50mV, + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .vsel_reg = LM3631_REG_VOUT_POS, + .vsel_mask = LM3631_VOUT_MASK, + .enable_reg = LM3631_REG_LDO_CTRL1, + .enable_mask = LM3631_EN_VPOS_MASK, + }, + { + .name = "ldo_vneg", + .id = LM3631_LDO_NEG, + .ops = &lm363x_regulator_voltage_table_ops, + .n_voltages = LM3631_LDO_VSEL_MAX + 1, + .min_uV = LM3631_VLDO_MIN, + .uV_step = LM363X_STEP_50mV, + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .vsel_reg = LM3631_REG_VOUT_NEG, + .vsel_mask = LM3631_VOUT_MASK, + .enable_reg = LM3631_REG_LDO_CTRL1, + .enable_mask = LM3631_EN_VNEG_MASK, + }, + /* LM3632 */ + { + .name = "vboost", + .id = LM3632_BOOST, + .ops = &lm363x_boost_voltage_table_ops, + .n_voltages = LM3632_BOOST_VSEL_MAX + 1, + .min_uV = LM3632_VBOOST_MIN, + .uV_step = LM363X_STEP_50mV, + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .vsel_reg = LM3632_REG_VOUT_BOOST, + .vsel_mask = LM3632_VOUT_MASK, + }, + { + .name = "ldo_vpos", + .id = LM3632_LDO_POS, + .ops = &lm363x_regulator_voltage_table_ops, + .n_voltages = LM3632_LDO_VSEL_MAX + 1, + .min_uV = LM3632_VLDO_MIN, + .uV_step = LM363X_STEP_50mV, + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .vsel_reg = LM3632_REG_VOUT_POS, + .vsel_mask = LM3632_VOUT_MASK, + .enable_reg = LM3632_REG_BIAS_CONFIG, + .enable_mask = LM3632_EN_VPOS_MASK, + }, + { + .name = "ldo_vneg", + .id = LM3632_LDO_NEG, + .ops = &lm363x_regulator_voltage_table_ops, + .n_voltages = LM3632_LDO_VSEL_MAX + 1, + .min_uV = LM3632_VLDO_MIN, + .uV_step = LM363X_STEP_50mV, + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .vsel_reg = LM3632_REG_VOUT_NEG, + .vsel_mask = LM3632_VOUT_MASK, + .enable_reg = LM3632_REG_BIAS_CONFIG, + .enable_mask = LM3632_EN_VNEG_MASK, + }, +}; + +static struct of_regulator_match lm363x_regulator_matches[] = { + [LM3631_BOOST] = { .name = "vboost" }, + [LM3631_LDO_CONT] = { .name = "vcont" }, + [LM3631_LDO_OREF] = { .name = "voref" }, + [LM3631_LDO_POS] = { .name = "vpos" }, + [LM3631_LDO_NEG] = { .name = "vneg" }, + [LM3632_BOOST] = { .name = "vboost" }, + [LM3632_LDO_POS] = { .name = "vpos" }, + [LM3632_LDO_NEG] = { .name = "vneg" }, +}; + +static struct regulator_init_data * +lm363x_regulator_of_get_init_data(struct device *dev, + struct lm363x_regulator *lm363x_regulator, int id) +{ + struct device_node *np = dev->of_node; + int count; + + count = of_regulator_match(dev, np, &lm363x_regulator_matches[id], 1); + if (count <= 0) + return ERR_PTR(-ENODEV); + + return lm363x_regulator_matches[id].init_data; +} + +static int lm363x_regulator_of_get_enable_gpio(struct device *dev, int id) +{ + struct device_node *np = dev->of_node; + int gpio = -1; + + /* + * Check LCM_EN1/2_GPIO is configured. + * Those pins are used for enabling VPOS/VNEG LDOs. + */ + if (id == LM3632_LDO_POS) + gpio = of_get_named_gpio(np, "ti,lcm-en1-gpio", 0); + else if (id == LM3632_LDO_NEG) + gpio = of_get_named_gpio(np, "ti,lcm-en2-gpio", 0); + + return gpio; +} + +static int lm363x_regulator_probe(struct platform_device *pdev) +{ + struct ti_lmu *lmu = dev_get_drvdata(pdev->dev.parent); + struct lm363x_regulator *lm363x_regulator; + struct regulator_init_data *init_data; + struct regulator_config cfg = { }; + struct regulator_dev *rdev; + struct device *dev = &pdev->dev; + int id = pdev->id; + int ret, ena_gpio; + + lm363x_regulator = devm_kzalloc(dev, sizeof(*lm363x_regulator), + GFP_KERNEL); + if (!lm363x_regulator) + return -ENOMEM; + + lm363x_regulator->lmu = lmu; + + init_data = lm363x_regulator_of_get_init_data(dev, lm363x_regulator, + id); + if (IS_ERR(init_data)) + return PTR_ERR(init_data); + + cfg.dev = dev->parent; + cfg.init_data = init_data; + cfg.driver_data = lm363x_regulator; + cfg.regmap = lmu->regmap; + + /* + * LM3632 LDOs can be controlled by external pin. + * Register update is required if the pin is used. + */ + ena_gpio = lm363x_regulator_of_get_enable_gpio(dev, id); + if (gpio_is_valid(ena_gpio)) { + cfg.ena_gpio = ena_gpio; + cfg.ena_gpio_flags = GPIOF_OUT_INIT_LOW; + + ret = ti_lmu_update_bits(lmu, LM3632_REG_BIAS_CONFIG, + LM3632_EXT_EN_MASK, + LM3632_EXT_EN_MASK); + if (ret) { + dev_err(dev, "External pin err: %d\n", ret); + return ret; + } + } + + rdev = regulator_register(&lm363x_regulator_desc[id], &cfg); + if (IS_ERR(rdev)) { + ret = PTR_ERR(rdev); + dev_err(dev, "[%d] regulator register err: %d\n", id, ret); + return ret; + } + + lm363x_regulator->regulator = rdev; + platform_set_drvdata(pdev, lm363x_regulator); + + return 0; +} + +static int lm363x_regulator_remove(struct platform_device *pdev) +{ + struct lm363x_regulator *lm363x_regulator = platform_get_drvdata(pdev); + + regulator_unregister(lm363x_regulator->regulator); + return 0; +} + +static const struct of_device_id lm363x_regulator_of_match[] = { + { .compatible = "ti,lm363x-regulator" }, + { } +}; +MODULE_DEVICE_TABLE(of, lm363x_regulator_of_match); + +static struct platform_driver lm363x_regulator_driver = { + .probe = lm363x_regulator_probe, + .remove = lm363x_regulator_remove, + .driver = { + .name = "lm363x-regulator", + .of_match_table = lm363x_regulator_of_match, + }, +}; + +module_platform_driver(lm363x_regulator_driver); + +MODULE_DESCRIPTION("TI LM363X Regulator Driver"); +MODULE_AUTHOR("Milo Kim"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:lm363x-regulator"); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/