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Tue, 12 Aug 2025 14:45:29 -0700 (PDT) Received: from localhost.localdomain ([2600:1700:fb0:1bc0:d904:cea9:a76b:d0a3]) by smtp.gmail.com with ESMTPSA id 586e51a60fabf-30c10c7a694sm4092741fac.9.2025.08.12.14.45.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Aug 2025 14:45:29 -0700 (PDT) From: Chris Morgan To: linux-rockchip@lists.infradead.org Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, broonie@kernel.org, lee@kernel.org, lgirdwood@gmail.com, sre@kernel.org, heiko@sntech.de, conor+dt@kernel.org, krzk+dt@kernel.org, robh@kernel.org, Chris Morgan Subject: [PATCH V6 4/5] regulator: bq257xx: Add bq257xx boost regulator driver Date: Tue, 12 Aug 2025 16:42:59 -0500 Message-ID: <20250812214300.123129-5-macroalpha82@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250812214300.123129-1-macroalpha82@gmail.com> References: <20250812214300.123129-1-macroalpha82@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250812_144530_991962_E7EF667C X-CRM114-Status: GOOD ( 24.92 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org From: Chris Morgan Add support for the boost regulator found in the Texas Instruments BQ25703. The boost regulator is capable of outputting between 4.48 and 20.8 volts and between 0 and 6.35 amps. Signed-off-by: Chris Morgan Reviewed-by: Mark Brown --- drivers/regulator/Kconfig | 8 ++ drivers/regulator/Makefile | 1 + drivers/regulator/bq257xx-regulator.c | 188 ++++++++++++++++++++++++++ 3 files changed, 197 insertions(+) create mode 100644 drivers/regulator/bq257xx-regulator.c diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index eaa6df1c9f80..60b14472c599 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -297,6 +297,14 @@ config REGULATOR_BD96801 This driver can also be built as a module. If so, the module will be called bd96801-regulator. +config REGULATOR_BQ257XX + tristate "TI BQ257XX regulator family" + depends on MFD_BQ257XX + depends on GPIOLIB || COMPILE_TEST + help + Say Y to enable support for the boost regulator function of + the BQ257XX family of charger circuits. + config REGULATOR_CPCAP tristate "Motorola CPCAP regulator" depends on MFD_CPCAP diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index be98b29d6675..e9ab5945b3c8 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -38,6 +38,7 @@ obj-$(CONFIG_REGULATOR_BD71828) += bd71828-regulator.o obj-$(CONFIG_REGULATOR_BD718XX) += bd718x7-regulator.o obj-$(CONFIG_REGULATOR_BD9571MWV) += bd9571mwv-regulator.o obj-$(CONFIG_REGULATOR_BD957XMUF) += bd9576-regulator.o +obj-$(CONFIG_REGULATOR_BQ257XX) += bq257xx-regulator.o obj-$(CONFIG_REGULATOR_DA903X) += da903x-regulator.o obj-$(CONFIG_REGULATOR_BD96801) += bd96801-regulator.o obj-$(CONFIG_REGULATOR_DA9052) += da9052-regulator.o diff --git a/drivers/regulator/bq257xx-regulator.c b/drivers/regulator/bq257xx-regulator.c new file mode 100644 index 000000000000..26e1e07a4a71 --- /dev/null +++ b/drivers/regulator/bq257xx-regulator.c @@ -0,0 +1,188 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * BQ257XX Battery Charger Driver + * Copyright (C) 2025 Chris Morgan + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct bq257xx_reg_data { + struct bq257xx_device *bq; + struct regulator_dev *bq257xx_reg; + struct gpio_desc *otg_en_gpio; + struct regulator_desc desc; +}; + +static int bq25703_vbus_get_cur_limit(struct regulator_dev *rdev) +{ + struct bq257xx_reg_data *pdata = rdev_get_drvdata(rdev); + int ret; + unsigned int reg; + + ret = regmap_read(pdata->bq->regmap, BQ25703_OTG_CURRENT, ®); + if (ret) + return ret; + return FIELD_GET(BQ25703_OTG_CUR_MASK, reg) * BQ25703_OTG_CUR_STEP_UA; +} + +/* + * Check if the minimum current and maximum current requested are + * sane values, then set the register accordingly. + */ +static int bq25703_vbus_set_cur_limit(struct regulator_dev *rdev, + int min_uA, int max_uA) +{ + struct bq257xx_reg_data *pdata = rdev_get_drvdata(rdev); + unsigned int reg; + + if ((min_uA > BQ25703_OTG_CUR_MAX_UA) || (max_uA < 0)) + return -EINVAL; + + reg = (max_uA / BQ25703_OTG_CUR_STEP_UA); + + /* Catch rounding errors since our step is 50000uA. */ + if ((reg * BQ25703_OTG_CUR_STEP_UA) < min_uA) + return -EINVAL; + + return regmap_write(pdata->bq->regmap, BQ25703_OTG_CURRENT, + FIELD_PREP(BQ25703_OTG_CUR_MASK, reg)); +} + +static int bq25703_vbus_enable(struct regulator_dev *rdev) +{ + struct bq257xx_reg_data *pdata = rdev_get_drvdata(rdev); + + if (pdata->otg_en_gpio) + gpiod_set_value_cansleep(pdata->otg_en_gpio, 1); + return regulator_enable_regmap(rdev); +} + +static int bq25703_vbus_disable(struct regulator_dev *rdev) +{ + struct bq257xx_reg_data *pdata = rdev_get_drvdata(rdev); + + if (pdata->otg_en_gpio) + gpiod_set_value_cansleep(pdata->otg_en_gpio, 0); + return regulator_disable_regmap(rdev); +} + +static const struct regulator_ops bq25703_vbus_ops = { + .enable = bq25703_vbus_enable, + .disable = bq25703_vbus_disable, + .is_enabled = regulator_is_enabled_regmap, + .list_voltage = regulator_list_voltage_linear, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .get_current_limit = bq25703_vbus_get_cur_limit, + .set_current_limit = bq25703_vbus_set_cur_limit, +}; + +static const struct regulator_desc bq25703_vbus_desc = { + .name = "vbus", + .of_match = of_match_ptr("vbus"), + .regulators_node = of_match_ptr("regulators"), + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .ops = &bq25703_vbus_ops, + .min_uV = BQ25703_OTG_VOLT_MIN_UV, + .uV_step = BQ25703_OTG_VOLT_STEP_UV, + .n_voltages = BQ25703_OTG_VOLT_NUM_VOLT, + .enable_mask = BQ25703_EN_OTG_MASK, + .enable_reg = BQ25703_CHARGE_OPTION_3, + .enable_val = BQ25703_EN_OTG_MASK, + .disable_val = 0, + .vsel_reg = BQ25703_OTG_VOLT, + .vsel_mask = BQ25703_OTG_VOLT_MASK, +}; + +/* Get optional GPIO for OTG regulator enable. */ +static void bq257xx_reg_dt_parse_gpio(struct platform_device *pdev) +{ + struct device_node *child, *subchild; + struct bq257xx_reg_data *pdata = platform_get_drvdata(pdev); + + child = of_get_child_by_name(pdev->dev.of_node, + pdata->desc.regulators_node); + if (!child) + return; + + subchild = of_get_child_by_name(child, pdata->desc.of_match); + if (!subchild) + return; + + of_node_put(child); + + pdata->otg_en_gpio = devm_fwnode_gpiod_get_index(&pdev->dev, + of_fwnode_handle(subchild), + "enable", 0, + GPIOD_OUT_LOW, + pdata->desc.of_match); + + of_node_put(subchild); + + if (IS_ERR_OR_NULL(pdata->otg_en_gpio)) { + dev_err(&pdev->dev, "Error getting enable gpio: %ld\n", + PTR_ERR(pdata->otg_en_gpio)); + return; + } +} + +static int bq257xx_regulator_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct bq257xx_device *bq = dev_get_drvdata(pdev->dev.parent); + struct bq257xx_reg_data *pdata; + struct device_node *np = dev->of_node; + struct regulator_init_data *init_data; + struct regulator_config cfg = {}; + + pdev->dev.of_node = pdev->dev.parent->of_node; + pdev->dev.of_node_reused = true; + + pdata = devm_kzalloc(&pdev->dev, sizeof(struct bq257xx_reg_data), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + + pdata->bq = bq; + pdata->desc = bq25703_vbus_desc; + + platform_set_drvdata(pdev, pdata); + bq257xx_reg_dt_parse_gpio(pdev); + + cfg.dev = &pdev->dev; + cfg.init_data = init_data; + cfg.driver_data = pdata; + cfg.of_node = np; + cfg.regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!cfg.regmap) + return -ENODEV; + + pdata->bq257xx_reg = devm_regulator_register(dev, &pdata->desc, &cfg); + if (IS_ERR(pdata->bq257xx_reg)) { + return dev_err_probe(&pdev->dev, PTR_ERR(pdata->bq257xx_reg), + "error registering bq257xx regulator"); + } + + return 0; +} + +static struct platform_driver bq257xx_reg_driver = { + .driver = { + .name = "bq257xx-regulator", + }, + .probe = bq257xx_regulator_probe, +}; + +module_platform_driver(bq257xx_reg_driver); + +MODULE_DESCRIPTION("bq257xx regulator driver"); +MODULE_AUTHOR("Chris Morgan "); +MODULE_LICENSE("GPL"); -- 2.43.0 _______________________________________________ Linux-rockchip mailing list Linux-rockchip@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-rockchip