target/linux/ipq40xx/patches-5.10/0002-01-v5.6-regulator-add-IPQ4019-SDHCI-VQMMC-LDO-driver.patch

   1 From 97043d292365ae39d62b54a6d79dff98d048b501 Mon Sep 17 00:00:00 2001
   2 From: Robert Marko <robert.marko@sartura.hr>
   3 Date: Wed, 22 Jan 2020 12:44:14 +0100
   4 Subject: [PATCH] From ebf652b408200504194be32ad0a3f5bb49d6000a Mon Sep 17
   5  00:00:00 2001 From: Robert Marko <robert.marko@sartura.hr> Date: Sun, 12 Jan
   6  2020 12:30:01 +0100 Subject: [PATCH] regulator: add IPQ4019 SDHCI VQMMC LDO
   7  driver
   8
   9 This introduces the IPQ4019 VQMMC LDO driver needed for
  10 the SD/EMMC driver I/O level operation.
  11 This will enable introducing SD/EMMC support for the built-in controller.
  12
  13 Signed-off-by: Mantas Pucka <mantas@8devices.com>
  14 Signed-off-by: Robert Marko <robert.marko@sartura.hr>
  15 Link: https://lore.kernel.org/r/20200112113003.11110-1-robert.marko@sartura.hr
  16 Signed-off-by: Mark Brown <broonie@kernel.org>
  17 ---
  18  drivers/regulator/Kconfig                   |   7 ++
  19  drivers/regulator/Makefile                  |   1 +
  20  drivers/regulator/vqmmc-ipq4019-regulator.c | 101 ++++++++++++++++++++
  21  3 files changed, 109 insertions(+)
  22  create mode 100644 drivers/regulator/vqmmc-ipq4019-regulator.c
  23
  24 --- a/drivers/regulator/Kconfig
  25 +++ b/drivers/regulator/Kconfig
  26 @@ -1077,6 +1077,13 @@ config REGULATOR_VEXPRESS
  27           This driver provides support for voltage regulators available
  28           on the ARM Ltd's Versatile Express platform.
  29
  30 +config REGULATOR_VQMMC_IPQ4019
  31 +       tristate "IPQ4019 VQMMC SD LDO regulator support"
  32 +       depends on ARCH_QCOM
  33 +       help
  34 +         This driver provides support for the VQMMC LDO I/0
  35 +         voltage regulator of the IPQ4019 SD/EMMC controller.
  36 +
  37  config REGULATOR_WM831X
  38         tristate "Wolfson Microelectronics WM831x PMIC regulators"
  39         depends on MFD_WM831X
  40 --- a/drivers/regulator/Makefile
  41 +++ b/drivers/regulator/Makefile
  42 @@ -132,6 +132,7 @@ obj-$(CONFIG_REGULATOR_TWL4030) += twl-r
  43  obj-$(CONFIG_REGULATOR_UNIPHIER) += uniphier-regulator.o
  44  obj-$(CONFIG_REGULATOR_VCTRL) += vctrl-regulator.o
  45  obj-$(CONFIG_REGULATOR_VEXPRESS) += vexpress-regulator.o
  46 +obj-$(CONFIG_REGULATOR_VQMMC_IPQ4019) += vqmmc-ipq4019-regulator.o
  47  obj-$(CONFIG_REGULATOR_WM831X) += wm831x-dcdc.o
  48  obj-$(CONFIG_REGULATOR_WM831X) += wm831x-isink.o
  49  obj-$(CONFIG_REGULATOR_WM831X) += wm831x-ldo.o
  50 --- /dev/null
  51 +++ b/drivers/regulator/vqmmc-ipq4019-regulator.c
  52 @@ -0,0 +1,101 @@
  53 +// SPDX-License-Identifier: GPL-2.0+
  54 +//
  55 +// Copyright (c) 2019 Mantas Pucka <mantas@8devices.com>
  56 +// Copyright (c) 2019 Robert Marko <robert.marko@sartura.hr>
  57 +//
  58 +// Driver for IPQ4019 SD/MMC controller's I/O LDO voltage regulator
  59 +
  60 +#include <linux/io.h>
  61 +#include <linux/module.h>
  62 +#include <linux/of.h>
  63 +#include <linux/platform_device.h>
  64 +#include <linux/regmap.h>
  65 +#include <linux/regulator/driver.h>
  66 +#include <linux/regulator/machine.h>
  67 +#include <linux/regulator/of_regulator.h>
  68 +
  69 +static const unsigned int ipq4019_vmmc_voltages[] = {
  70 +       1500000, 1800000, 2500000, 3000000,
  71 +};
  72 +
  73 +static const struct regulator_ops ipq4019_regulator_voltage_ops = {
  74 +       .list_voltage = regulator_list_voltage_table,
  75 +       .map_voltage = regulator_map_voltage_ascend,
  76 +       .get_voltage_sel = regulator_get_voltage_sel_regmap,
  77 +       .set_voltage_sel = regulator_set_voltage_sel_regmap,
  78 +};
  79 +
  80 +static const struct regulator_desc vmmc_regulator = {
  81 +       .name           = "vmmcq",
  82 +       .ops            = &ipq4019_regulator_voltage_ops,
  83 +       .type           = REGULATOR_VOLTAGE,
  84 +       .owner          = THIS_MODULE,
  85 +       .volt_table     = ipq4019_vmmc_voltages,
  86 +       .n_voltages     = ARRAY_SIZE(ipq4019_vmmc_voltages),
  87 +       .vsel_reg       = 0,
  88 +       .vsel_mask      = 0x3,
  89 +};
  90 +
  91 +static const struct regmap_config ipq4019_vmmcq_regmap_config = {
  92 +       .reg_bits       = 32,
  93 +       .reg_stride     = 4,
  94 +       .val_bits       = 32,
  95 +};
  96 +
  97 +static int ipq4019_regulator_probe(struct platform_device *pdev)
  98 +{
  99 +       struct device *dev = &pdev->dev;
 100 +       struct regulator_init_data *init_data;
 101 +       struct regulator_config cfg = {};
 102 +       struct regulator_dev *rdev;
 103 +       struct resource *res;
 104 +       struct regmap *rmap;
 105 +       void __iomem *base;
 106 +
 107 +       init_data = of_get_regulator_init_data(dev, dev->of_node,
 108 +                                              &vmmc_regulator);
 109 +       if (!init_data)
 110 +               return -EINVAL;
 111 +
 112 +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 113 +       base = devm_ioremap_resource(dev, res);
 114 +       if (IS_ERR(base))
 115 +               return PTR_ERR(base);
 116 +
 117 +       rmap = devm_regmap_init_mmio(dev, base, &ipq4019_vmmcq_regmap_config);
 118 +       if (IS_ERR(rmap))
 119 +               return PTR_ERR(rmap);
 120 +
 121 +       cfg.dev = dev;
 122 +       cfg.init_data = init_data;
 123 +       cfg.of_node = dev->of_node;
 124 +       cfg.regmap = rmap;
 125 +
 126 +       rdev = devm_regulator_register(dev, &vmmc_regulator, &cfg);
 127 +       if (IS_ERR(rdev)) {
 128 +               dev_err(dev, "Failed to register regulator: %ld\n",
 129 +                       PTR_ERR(rdev));
 130 +               return PTR_ERR(rdev);
 131 +       }
 132 +       platform_set_drvdata(pdev, rdev);
 133 +
 134 +       return 0;
 135 +}
 136 +
 137 +static const struct of_device_id regulator_ipq4019_of_match[] = {
 138 +       { .compatible = "qcom,vqmmc-ipq4019-regulator", },
 139 +       {},
 140 +};
 141 +
 142 +static struct platform_driver ipq4019_regulator_driver = {
 143 +       .probe = ipq4019_regulator_probe,
 144 +       .driver = {
 145 +               .name = "vqmmc-ipq4019-regulator",
 146 +               .of_match_table = of_match_ptr(regulator_ipq4019_of_match),
 147 +       },
 148 +};
 149 +module_platform_driver(ipq4019_regulator_driver);
 150 +
 151 +MODULE_LICENSE("GPL");
 152 +MODULE_AUTHOR("Mantas Pucka <mantas@8devices.com>");
 153 +MODULE_DESCRIPTION("IPQ4019 VQMMC voltage regulator");