regulator: add IPQ4019 SDHCI VQMMC LDO driver (ebf652b4) · Commits · 戴 / test

drivers/regulator/Kconfig

+7 −0

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		@@ -1110,6 +1110,13 @@ config REGULATOR_VEXPRESS
		This driver provides support for voltage regulators available
		on the ARM Ltd's Versatile Express platform.

		config REGULATOR_VQMMC_IPQ4019
		tristate "IPQ4019 VQMMC SD LDO regulator support"
		depends on ARCH_QCOM
		help
		This driver provides support for the VQMMC LDO I/0
		voltage regulator of the IPQ4019 SD/EMMC controller.

		config REGULATOR_WM831X
		tristate "Wolfson Microelectronics WM831x PMIC regulators"
		depends on MFD_WM831X

drivers/regulator/Makefile

+1 −0

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		@@ -135,6 +135,7 @@ obj-$(CONFIG_REGULATOR_TWL4030) += twl-regulator.o twl6030-regulator.o
		obj-$(CONFIG_REGULATOR_UNIPHIER) += uniphier-regulator.o
		obj-$(CONFIG_REGULATOR_VCTRL) += vctrl-regulator.o
		obj-$(CONFIG_REGULATOR_VEXPRESS) += vexpress-regulator.o
		obj-$(CONFIG_REGULATOR_VQMMC_IPQ4019) += vqmmc-ipq4019-regulator.o
		obj-$(CONFIG_REGULATOR_WM831X) += wm831x-dcdc.o
		obj-$(CONFIG_REGULATOR_WM831X) += wm831x-isink.o
		obj-$(CONFIG_REGULATOR_WM831X) += wm831x-ldo.o

drivers/regulator/vqmmc-ipq4019-regulator.c

0 → 100644

+111 −0

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		// SPDX-License-Identifier: GPL-2.0+
		//
		// Copyright (c) 2019 Mantas Pucka <mantas@8devices.com>
		// Copyright (c) 2019 Robert Marko <robert.marko@sartura.hr>
		//
		// Driver for IPQ4019 SD/MMC controller's I/O LDO voltage regulator

		#include <linux/io.h>
		#include <linux/module.h>
		#include <linux/of.h>
		#include <linux/platform_device.h>
		#include <linux/regmap.h>
		#include <linux/regulator/driver.h>
		#include <linux/regulator/machine.h>
		#include <linux/regulator/of_regulator.h>

		static const unsigned int ipq4019_vmmc_voltages[] = {
		1500000, 1800000, 2500000, 3000000,
		};

		static struct regulator_ops ipq4019_regulator_voltage_ops = {
		.list_voltage = regulator_list_voltage_table,
		.get_voltage_sel = regulator_get_voltage_sel_regmap,
		.set_voltage_sel = regulator_set_voltage_sel_regmap,
		};

		static struct regulator_desc vmmc_regulator = {
		.name = "vmmcq",
		.ops = &ipq4019_regulator_voltage_ops,
		.type = REGULATOR_VOLTAGE,
		.owner = THIS_MODULE,
		.volt_table = ipq4019_vmmc_voltages,
		.n_voltages = ARRAY_SIZE(ipq4019_vmmc_voltages),
		.vsel_reg = 0,
		.vsel_mask = 0x3,
		};

		const struct regmap_config ipq4019_vmmcq_regmap_config = {
		.reg_bits = 32,
		.reg_stride = 4,
		.val_bits = 32,
		};

		static int ipq4019_regulator_probe(struct platform_device *pdev)
		{
		struct device *dev = &pdev->dev;
		struct regulator_init_data *init_data;
		struct regulator_config cfg = {};
		struct regulator_dev *rdev;
		struct resource *res;
		struct regmap *rmap;
		void __iomem *base;

		init_data = of_get_regulator_init_data(dev, dev->of_node,
		&vmmc_regulator);
		if (!init_data)
		return -EINVAL;

		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		base = devm_ioremap_resource(dev, res);
		if (IS_ERR(base))
		return PTR_ERR(base);

		rmap = devm_regmap_init_mmio(dev, base, &ipq4019_vmmcq_regmap_config);
		if (IS_ERR(rmap))
		return PTR_ERR(rmap);

		cfg.dev = dev;
		cfg.init_data = init_data;
		cfg.of_node = dev->of_node;
		cfg.regmap = rmap;

		rdev = devm_regulator_register(dev, &vmmc_regulator, &cfg);
		if (IS_ERR(rdev)) {
		dev_err(dev, "Failed to register regulator: %ld\n",
		PTR_ERR(rdev));
		return PTR_ERR(rdev);
		}
		platform_set_drvdata(pdev, rdev);

		return 0;
		}

		static int ipq4019_regulator_remove(struct platform_device *pdev)
		{
		struct regulator_dev *rdev = platform_get_drvdata(pdev);

		regulator_unregister(rdev);

		return 0;
		}

		static const struct of_device_id regulator_ipq4019_of_match[] = {
		{ .compatible = "qcom,vqmmc-ipq4019-regulator", },
		{},
		};

		static struct platform_driver ipq4019_regulator_driver = {
		.probe = ipq4019_regulator_probe,
		.remove = ipq4019_regulator_remove,
		.driver = {
		.name = "vqmmc-ipq4019-regulator",
		.owner = THIS_MODULE,
		.of_match_table = of_match_ptr(regulator_ipq4019_of_match),
		},
		};
		module_platform_driver(ipq4019_regulator_driver);

		MODULE_LICENSE("GPL");
		MODULE_AUTHOR("Mantas Pucka <mantas@8devices.com>");
		MODULE_DESCRIPTION("IPQ4019 VQMMC voltage regulator");

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