154 lines
5.0 KiB
Diff
154 lines
5.0 KiB
Diff
From 97043d292365ae39d62b54a6d79dff98d048b501 Mon Sep 17 00:00:00 2001
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From: Robert Marko <robert.marko@sartura.hr>
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Date: Wed, 22 Jan 2020 12:44:14 +0100
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Subject: [PATCH] From ebf652b408200504194be32ad0a3f5bb49d6000a Mon Sep 17
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00:00:00 2001 From: Robert Marko <robert.marko@sartura.hr> Date: Sun, 12 Jan
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2020 12:30:01 +0100 Subject: [PATCH] regulator: add IPQ4019 SDHCI VQMMC LDO
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driver
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This introduces the IPQ4019 VQMMC LDO driver needed for
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the SD/EMMC driver I/O level operation.
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This will enable introducing SD/EMMC support for the built-in controller.
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Signed-off-by: Mantas Pucka <mantas@8devices.com>
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Signed-off-by: Robert Marko <robert.marko@sartura.hr>
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Link: https://lore.kernel.org/r/20200112113003.11110-1-robert.marko@sartura.hr
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Signed-off-by: Mark Brown <broonie@kernel.org>
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---
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drivers/regulator/Kconfig | 7 ++
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drivers/regulator/Makefile | 1 +
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drivers/regulator/vqmmc-ipq4019-regulator.c | 101 ++++++++++++++++++++
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3 files changed, 109 insertions(+)
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create mode 100644 drivers/regulator/vqmmc-ipq4019-regulator.c
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--- a/drivers/regulator/Kconfig
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+++ b/drivers/regulator/Kconfig
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@@ -1077,6 +1077,13 @@ config REGULATOR_VEXPRESS
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This driver provides support for voltage regulators available
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on the ARM Ltd's Versatile Express platform.
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+config REGULATOR_VQMMC_IPQ4019
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+ tristate "IPQ4019 VQMMC SD LDO regulator support"
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+ depends on ARCH_QCOM
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+ help
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+ This driver provides support for the VQMMC LDO I/0
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+ voltage regulator of the IPQ4019 SD/EMMC controller.
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+
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config REGULATOR_WM831X
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tristate "Wolfson Microelectronics WM831x PMIC regulators"
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depends on MFD_WM831X
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--- a/drivers/regulator/Makefile
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+++ b/drivers/regulator/Makefile
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@@ -132,6 +132,7 @@ obj-$(CONFIG_REGULATOR_TWL4030) += twl-r
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obj-$(CONFIG_REGULATOR_UNIPHIER) += uniphier-regulator.o
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obj-$(CONFIG_REGULATOR_VCTRL) += vctrl-regulator.o
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obj-$(CONFIG_REGULATOR_VEXPRESS) += vexpress-regulator.o
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+obj-$(CONFIG_REGULATOR_VQMMC_IPQ4019) += vqmmc-ipq4019-regulator.o
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obj-$(CONFIG_REGULATOR_WM831X) += wm831x-dcdc.o
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obj-$(CONFIG_REGULATOR_WM831X) += wm831x-isink.o
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obj-$(CONFIG_REGULATOR_WM831X) += wm831x-ldo.o
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--- /dev/null
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+++ b/drivers/regulator/vqmmc-ipq4019-regulator.c
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@@ -0,0 +1,101 @@
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+// SPDX-License-Identifier: GPL-2.0+
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+//
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+// Copyright (c) 2019 Mantas Pucka <mantas@8devices.com>
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+// Copyright (c) 2019 Robert Marko <robert.marko@sartura.hr>
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+//
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+// Driver for IPQ4019 SD/MMC controller's I/O LDO voltage regulator
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+
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+#include <linux/io.h>
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+#include <linux/module.h>
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+#include <linux/of.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/machine.h>
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+#include <linux/regulator/of_regulator.h>
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+
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+static const unsigned int ipq4019_vmmc_voltages[] = {
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+ 1500000, 1800000, 2500000, 3000000,
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+};
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+
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+static const struct regulator_ops ipq4019_regulator_voltage_ops = {
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+ .list_voltage = regulator_list_voltage_table,
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+ .map_voltage = regulator_map_voltage_ascend,
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+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
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+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
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+};
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+
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+static const struct regulator_desc vmmc_regulator = {
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+ .name = "vmmcq",
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+ .ops = &ipq4019_regulator_voltage_ops,
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+ .type = REGULATOR_VOLTAGE,
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+ .owner = THIS_MODULE,
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+ .volt_table = ipq4019_vmmc_voltages,
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+ .n_voltages = ARRAY_SIZE(ipq4019_vmmc_voltages),
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+ .vsel_reg = 0,
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+ .vsel_mask = 0x3,
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+};
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+
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+static const struct regmap_config ipq4019_vmmcq_regmap_config = {
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+ .reg_bits = 32,
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+ .reg_stride = 4,
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+ .val_bits = 32,
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+};
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+
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+static int ipq4019_regulator_probe(struct platform_device *pdev)
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+{
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+ struct device *dev = &pdev->dev;
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+ struct regulator_init_data *init_data;
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+ struct regulator_config cfg = {};
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+ struct regulator_dev *rdev;
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+ struct resource *res;
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+ struct regmap *rmap;
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+ void __iomem *base;
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+
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+ init_data = of_get_regulator_init_data(dev, dev->of_node,
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+ &vmmc_regulator);
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+ if (!init_data)
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+ return -EINVAL;
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+
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+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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+ base = devm_ioremap_resource(dev, res);
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+ if (IS_ERR(base))
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+ return PTR_ERR(base);
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+
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+ rmap = devm_regmap_init_mmio(dev, base, &ipq4019_vmmcq_regmap_config);
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+ if (IS_ERR(rmap))
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+ return PTR_ERR(rmap);
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+
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+ cfg.dev = dev;
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+ cfg.init_data = init_data;
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+ cfg.of_node = dev->of_node;
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+ cfg.regmap = rmap;
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+
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+ rdev = devm_regulator_register(dev, &vmmc_regulator, &cfg);
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+ if (IS_ERR(rdev)) {
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+ dev_err(dev, "Failed to register regulator: %ld\n",
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+ PTR_ERR(rdev));
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+ return PTR_ERR(rdev);
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+ }
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+ platform_set_drvdata(pdev, rdev);
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+
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+ return 0;
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+}
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+
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+static const struct of_device_id regulator_ipq4019_of_match[] = {
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+ { .compatible = "qcom,vqmmc-ipq4019-regulator", },
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+ {},
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+};
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+
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+static struct platform_driver ipq4019_regulator_driver = {
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+ .probe = ipq4019_regulator_probe,
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+ .driver = {
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+ .name = "vqmmc-ipq4019-regulator",
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+ .of_match_table = of_match_ptr(regulator_ipq4019_of_match),
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+ },
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+};
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+module_platform_driver(ipq4019_regulator_driver);
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+
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+MODULE_LICENSE("GPL");
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+MODULE_AUTHOR("Mantas Pucka <mantas@8devices.com>");
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+MODULE_DESCRIPTION("IPQ4019 VQMMC voltage regulator");
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