+++ /dev/null
-From 97043d292365ae39d62b54a6d79dff98d048b501 Mon Sep 17 00:00:00 2001
-From: Robert Marko <robert.marko@sartura.hr>
-Date: Wed, 22 Jan 2020 12:44:14 +0100
-Subject: [PATCH] From ebf652b408200504194be32ad0a3f5bb49d6000a Mon Sep 17
- 00:00:00 2001 From: Robert Marko <robert.marko@sartura.hr> 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 <mantas@8devices.com>
-Signed-off-by: Robert Marko <robert.marko@sartura.hr>
-Link: https://lore.kernel.org/r/20200112113003.11110-1-robert.marko@sartura.hr
-Signed-off-by: Mark Brown <broonie@kernel.org>
----
- drivers/regulator/Kconfig | 7 ++
- drivers/regulator/Makefile | 1 +
- drivers/regulator/vqmmc-ipq4019-regulator.c | 101 ++++++++++++++++++++
- 3 files changed, 109 insertions(+)
- create mode 100644 drivers/regulator/vqmmc-ipq4019-regulator.c
-
---- a/drivers/regulator/Kconfig
-+++ b/drivers/regulator/Kconfig
-@@ -981,6 +981,13 @@ 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
---- a/drivers/regulator/Makefile
-+++ b/drivers/regulator/Makefile
-@@ -122,6 +122,7 @@ obj-$(CONFIG_REGULATOR_TWL4030) += twl-r
- obj-$(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
---- /dev/null
-+++ b/drivers/regulator/vqmmc-ipq4019-regulator.c
-@@ -0,0 +1,101 @@
-+// 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 const struct regulator_ops ipq4019_regulator_voltage_ops = {
-+ .list_voltage = regulator_list_voltage_table,
-+ .map_voltage = regulator_map_voltage_ascend,
-+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
-+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
-+};
-+
-+static const 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,
-+};
-+
-+static 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 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,
-+ .driver = {
-+ .name = "vqmmc-ipq4019-regulator",
-+ .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");
projects / openwrt / openwrt.git / blobdiff