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128 lines
3.5 KiB
128 lines
3.5 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// Copyright (C) STMicroelectronics 2019 |
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// Author(s): Fabrice Gasnier <[email protected]>. |
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#include <linux/mfd/syscon.h> |
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#include <linux/module.h> |
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#include <linux/of_device.h> |
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#include <linux/platform_device.h> |
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#include <linux/regmap.h> |
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#include <linux/regulator/driver.h> |
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#include <linux/regulator/of_regulator.h> |
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/* STM32H7 SYSCFG register */ |
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#define STM32H7_SYSCFG_PMCR 0x04 |
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#define STM32H7_SYSCFG_BOOSTE_MASK BIT(8) |
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/* STM32MP1 SYSCFG has set and clear registers */ |
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#define STM32MP1_SYSCFG_PMCSETR 0x04 |
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#define STM32MP1_SYSCFG_PMCCLRR 0x44 |
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#define STM32MP1_SYSCFG_EN_BOOSTER_MASK BIT(8) |
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static const struct regulator_ops stm32h7_booster_ops = { |
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.enable = regulator_enable_regmap, |
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.disable = regulator_disable_regmap, |
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.is_enabled = regulator_is_enabled_regmap, |
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}; |
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static const struct regulator_desc stm32h7_booster_desc = { |
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.name = "booster", |
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.supply_name = "vdda", |
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.n_voltages = 1, |
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.type = REGULATOR_VOLTAGE, |
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.fixed_uV = 3300000, |
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.ramp_delay = 66000, /* up to 50us to stabilize */ |
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.ops = &stm32h7_booster_ops, |
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.enable_reg = STM32H7_SYSCFG_PMCR, |
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.enable_mask = STM32H7_SYSCFG_BOOSTE_MASK, |
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.owner = THIS_MODULE, |
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}; |
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static int stm32mp1_booster_enable(struct regulator_dev *rdev) |
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{ |
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return regmap_write(rdev->regmap, STM32MP1_SYSCFG_PMCSETR, |
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STM32MP1_SYSCFG_EN_BOOSTER_MASK); |
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} |
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static int stm32mp1_booster_disable(struct regulator_dev *rdev) |
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{ |
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return regmap_write(rdev->regmap, STM32MP1_SYSCFG_PMCCLRR, |
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STM32MP1_SYSCFG_EN_BOOSTER_MASK); |
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} |
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static const struct regulator_ops stm32mp1_booster_ops = { |
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.enable = stm32mp1_booster_enable, |
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.disable = stm32mp1_booster_disable, |
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.is_enabled = regulator_is_enabled_regmap, |
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}; |
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static const struct regulator_desc stm32mp1_booster_desc = { |
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.name = "booster", |
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.supply_name = "vdda", |
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.n_voltages = 1, |
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.type = REGULATOR_VOLTAGE, |
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.fixed_uV = 3300000, |
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.ramp_delay = 66000, |
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.ops = &stm32mp1_booster_ops, |
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.enable_reg = STM32MP1_SYSCFG_PMCSETR, |
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.enable_mask = STM32MP1_SYSCFG_EN_BOOSTER_MASK, |
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.owner = THIS_MODULE, |
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}; |
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static int stm32_booster_probe(struct platform_device *pdev) |
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{ |
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struct device *dev = &pdev->dev; |
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struct device_node *np = pdev->dev.of_node; |
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struct regulator_config config = { }; |
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const struct regulator_desc *desc; |
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struct regulator_dev *rdev; |
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struct regmap *regmap; |
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int ret; |
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regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg"); |
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if (IS_ERR(regmap)) |
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return PTR_ERR(regmap); |
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desc = (const struct regulator_desc *) |
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of_match_device(dev->driver->of_match_table, dev)->data; |
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config.regmap = regmap; |
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config.dev = dev; |
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config.of_node = np; |
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config.init_data = of_get_regulator_init_data(dev, np, desc); |
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rdev = devm_regulator_register(dev, desc, &config); |
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if (IS_ERR(rdev)) { |
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ret = PTR_ERR(rdev); |
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dev_err(dev, "register failed with error %d\n", ret); |
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return ret; |
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} |
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return 0; |
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} |
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static const struct of_device_id __maybe_unused stm32_booster_of_match[] = { |
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{ |
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.compatible = "st,stm32h7-booster", |
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.data = (void *)&stm32h7_booster_desc |
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}, { |
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.compatible = "st,stm32mp1-booster", |
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.data = (void *)&stm32mp1_booster_desc |
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}, { |
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}, |
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}; |
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MODULE_DEVICE_TABLE(of, stm32_booster_of_match); |
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static struct platform_driver stm32_booster_driver = { |
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.probe = stm32_booster_probe, |
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.driver = { |
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.name = "stm32-booster", |
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.of_match_table = of_match_ptr(stm32_booster_of_match), |
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}, |
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}; |
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module_platform_driver(stm32_booster_driver); |
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MODULE_LICENSE("GPL v2"); |
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MODULE_AUTHOR("Fabrice Gasnier <[email protected]>"); |
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MODULE_DESCRIPTION("STMicroelectronics STM32 booster regulator driver"); |
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MODULE_ALIAS("platform:stm32-booster");
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