From ebf652b408200504194be32ad0a3f5bb49d6000a Mon Sep 17 00:00:00 2001 From: Robert Marko Date: Sun, 12 Jan 2020 12:30:01 +0100 Subject: [PATCH] regulator: add IPQ4019 SDHCI VQMMC LDO driver This introduces the IPQ4019 VQMMC LDO driver needed for the SD/EMMC driver I/O level operation. This will enable introducing SD/EMMC support for the built-in controller. Signed-off-by: Mantas Pucka Signed-off-by: Robert Marko Link: https://lore.kernel.org/r/20200112113003.11110-1-robert.marko@sartura.hr Signed-off-by: Mark Brown --- drivers/regulator/Kconfig | 7 ++ drivers/regulator/Makefile | 1 + drivers/regulator/vqmmc-ipq4019-regulator.c | 111 ++++++++++++++++++++ 3 files changed, 119 insertions(+) create mode 100644 drivers/regulator/vqmmc-ipq4019-regulator.c diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 9fe2aa9fbbc1..97bfdd47954f 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -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 diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index b8c9072f8500..07bc977c52b0 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -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 diff --git a/drivers/regulator/vqmmc-ipq4019-regulator.c b/drivers/regulator/vqmmc-ipq4019-regulator.c new file mode 100644 index 000000000000..dae16094d3a2 --- /dev/null +++ b/drivers/regulator/vqmmc-ipq4019-regulator.c @@ -0,0 +1,111 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// Copyright (c) 2019 Mantas Pucka +// Copyright (c) 2019 Robert Marko +// +// Driver for IPQ4019 SD/MMC controller's I/O LDO voltage regulator + +#include +#include +#include +#include +#include +#include +#include +#include + +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 "); +MODULE_DESCRIPTION("IPQ4019 VQMMC voltage regulator");