ipq40xx: add vqmmc regulator driver

target/linux/ipq40xx/files/drivers/regulator/ipq4019-vqmmc-regulator.c

@@ -0,0 +1,111 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// Copyright (c) 2019 Mantas Pucka <mantas@8devices.com>
+// Copyright (c) 2019 Robert Marko <robimarko@gmail.com>
+//
+// 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,ipq4019-vqmmc-regulator", },
+	{},
+};
+
+static struct platform_driver ipq4019_regulator_driver = {
+	.probe = ipq4019_regulator_probe,
+	.remove = ipq4019_regulator_remove,
+	.driver = {
+		.name = "regulator-vqmmc-ipq4019",
+		.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");

target/linux/ipq40xx/patches-4.19/851-add-ipq40xx-vqmmc-regulator-driver-to-KConfig.patch

@@ -0,0 +1,26 @@
+--- a/drivers/regulator/Kconfig
++++ b/drivers/regulator/Kconfig
+@@ -334,6 +334,13 @@ config REGULATOR_HI655X
+ 	  This driver provides support for the voltage regulators of the
+ 	  Hisilicon Hi655x PMIC device.
+ 
++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_ISL9305
+ 	tristate "Intersil ISL9305 regulator"
+ 	depends on I2C
+--- a/drivers/regulator/Makefile
++++ b/drivers/regulator/Makefile
+@@ -43,6 +43,7 @@ obj-$(CONFIG_REGULATOR_GPIO) += gpio-reg
+ obj-$(CONFIG_REGULATOR_HI6421) += hi6421-regulator.o
+ obj-$(CONFIG_REGULATOR_HI6421V530) += hi6421v530-regulator.o
+ obj-$(CONFIG_REGULATOR_HI655X) += hi655x-regulator.o
++obj-$(CONFIG_REGULATOR_VQMMC_IPQ4019) += ipq4019-vqmmc-regulator.o
+ obj-$(CONFIG_REGULATOR_ISL6271A) += isl6271a-regulator.o
+ obj-$(CONFIG_REGULATOR_ISL9305) += isl9305.o
+ obj-$(CONFIG_REGULATOR_LM363X) += lm363x-regulator.o