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From 94c08223cd696d872cda7d9aa4e817956d0a0b84 Mon Sep 17 00:00:00 2001
From: Chen Zhong <chen.zhong@mediatek.com>
Date: Fri, 8 Jan 2016 04:17:37 +0100
Subject: [PATCH 047/102] regulator: mt6323: Add support for MT6323 regulator
The MT6323 is a regulator found on boards based on MediaTek MT7623 and
probably other SoCs. It is a so called pmic and connects as a slave to
SoC using SPI, wrapped inside the pmic-wrapper.
Signed-off-by: Chen Zhong <chen.zhong@mediatek.com>
Signed-off-by: John Crispin <blogic@openwrt.org>
---
drivers/regulator/Kconfig | 9 +
drivers/regulator/Makefile | 1 +
drivers/regulator/mt6323-regulator.c | 432 ++++++++++++++++++++++++++++
include/linux/regulator/mt6323-regulator.h | 52 ++++
4 files changed, 494 insertions(+)
create mode 100644 drivers/regulator/mt6323-regulator.c
create mode 100644 include/linux/regulator/mt6323-regulator.h
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -453,6 +453,15 @@ config REGULATOR_MT6311
This driver supports the control of different power rails of device
through regulator interface.
+config REGULATOR_MT6323
+ tristate "MediaTek MT6323 PMIC"
+ depends on MFD_MT6397
+ help
+ Say y here to select this option to enable the power regulator of
+ MediaTek MT6323 PMIC.
+ This driver supports the control of different power rails of device
+ through regulator interface.
+
config REGULATOR_MT6397
tristate "MediaTek MT6397 PMIC"
depends on MFD_MT6397
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -60,6 +60,7 @@ obj-$(CONFIG_REGULATOR_MC13783) += mc137
obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o
obj-$(CONFIG_REGULATOR_MC13XXX_CORE) += mc13xxx-regulator-core.o
obj-$(CONFIG_REGULATOR_MT6311) += mt6311-regulator.o
+obj-$(CONFIG_REGULATOR_MT6323) += mt6323-regulator.o
obj-$(CONFIG_REGULATOR_MT6397) += mt6397-regulator.o
obj-$(CONFIG_REGULATOR_QCOM_RPM) += qcom_rpm-regulator.o
obj-$(CONFIG_REGULATOR_QCOM_SMD_RPM) += qcom_smd-regulator.o
--- /dev/null
+++ b/drivers/regulator/mt6323-regulator.c
@@ -0,0 +1,432 @@
+/*
+ * Copyright (c) 2016 MediaTek Inc.
+ * Author: Chen Zhong <chen.zhong@mediatek.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/mfd/mt6397/core.h>
+#include <linux/mfd/mt6323/registers.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/mt6323-regulator.h>
+#include <linux/regulator/of_regulator.h>
+
+#define MT6323_LDO_MODE_NORMAL 0
+#define MT6323_LDO_MODE_LP 1
+
+/*
+ * MT6323 regulators' information
+ *
+ * @desc: standard fields of regulator description.
+ * @qi: Mask for query enable signal status of regulators
+ * @vselon_reg: Register sections for hardware control mode of bucks
+ * @vselctrl_reg: Register for controlling the buck control mode.
+ * @vselctrl_mask: Mask for query buck's voltage control mode.
+ */
+struct mt6323_regulator_info {
+ struct regulator_desc desc;
+ u32 qi;
+ u32 vselon_reg;
+ u32 vselctrl_reg;
+ u32 vselctrl_mask;
+ u32 modeset_reg;
+ u32 modeset_mask;
+};
+
+#define MT6323_BUCK(match, vreg, min, max, step, volt_ranges, enreg, \
+ vosel, vosel_mask, voselon, vosel_ctrl) \
+[MT6323_ID_##vreg] = { \
+ .desc = { \
+ .name = #vreg, \
+ .of_match = of_match_ptr(match), \
+ .ops = &mt6323_volt_range_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .id = MT6323_ID_##vreg, \
+ .owner = THIS_MODULE, \
+ .n_voltages = (max - min)/step + 1, \
+ .linear_ranges = volt_ranges, \
+ .n_linear_ranges = ARRAY_SIZE(volt_ranges), \
+ .vsel_reg = vosel, \
+ .vsel_mask = vosel_mask, \
+ .enable_reg = enreg, \
+ .enable_mask = BIT(0), \
+ }, \
+ .qi = BIT(13), \
+ .vselon_reg = voselon, \
+ .vselctrl_reg = vosel_ctrl, \
+ .vselctrl_mask = BIT(1), \
+}
+
+#define MT6323_LDO(match, vreg, ldo_volt_table, enreg, enbit, vosel, \
+ vosel_mask, _modeset_reg, _modeset_mask) \
+[MT6323_ID_##vreg] = { \
+ .desc = { \
+ .name = #vreg, \
+ .of_match = of_match_ptr(match), \
+ .ops = &mt6323_volt_table_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .id = MT6323_ID_##vreg, \
+ .owner = THIS_MODULE, \
+ .n_voltages = ARRAY_SIZE(ldo_volt_table), \
+ .volt_table = ldo_volt_table, \
+ .vsel_reg = vosel, \
+ .vsel_mask = vosel_mask, \
+ .enable_reg = enreg, \
+ .enable_mask = BIT(enbit), \
+ }, \
+ .qi = BIT(15), \
+ .modeset_reg = _modeset_reg, \
+ .modeset_mask = _modeset_mask, \
+}
+
+#define MT6323_REG_FIXED(match, vreg, enreg, enbit, volt, \
+ _modeset_reg, _modeset_mask) \
+[MT6323_ID_##vreg] = { \
+ .desc = { \
+ .name = #vreg, \
+ .of_match = of_match_ptr(match), \
+ .ops = &mt6323_volt_fixed_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .id = MT6323_ID_##vreg, \
+ .owner = THIS_MODULE, \
+ .n_voltages = 1, \
+ .enable_reg = enreg, \
+ .enable_mask = BIT(enbit), \
+ .min_uV = volt, \
+ }, \
+ .qi = BIT(15), \
+ .modeset_reg = _modeset_reg, \
+ .modeset_mask = _modeset_mask, \
+}
+
+static const struct regulator_linear_range buck_volt_range1[] = {
+ REGULATOR_LINEAR_RANGE(700000, 0, 0x7f, 6250),
+};
+
+static const struct regulator_linear_range buck_volt_range2[] = {
+ REGULATOR_LINEAR_RANGE(1400000, 0, 0x7f, 12500),
+};
+
+static const struct regulator_linear_range buck_volt_range3[] = {
+ REGULATOR_LINEAR_RANGE(500000, 0, 0x3f, 50000),
+};
+
+static const u32 ldo_volt_table1[] = {
+ 3300000, 3400000, 3500000, 3600000,
+};
+
+static const u32 ldo_volt_table2[] = {
+ 1500000, 1800000, 2500000, 2800000,
+};
+
+static const u32 ldo_volt_table3[] = {
+ 1800000, 3300000,
+};
+
+static const u32 ldo_volt_table4[] = {
+ 3000000, 3300000,
+};
+
+static const u32 ldo_volt_table5[] = {
+ 1200000, 1300000, 1500000, 1800000, 2000000, 2800000, 3000000, 3300000,
+};
+
+static const u32 ldo_volt_table6[] = {
+ 1200000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 2000000,
+};
+
+static const u32 ldo_volt_table7[] = {
+ 1200000, 1300000, 1500000, 1800000,
+};
+
+static const u32 ldo_volt_table8[] = {
+ 1800000, 3000000,
+};
+
+static const u32 ldo_volt_table9[] = {
+ 1200000, 1350000, 1500000, 1800000,
+};
+
+static const u32 ldo_volt_table10[] = {
+ 1200000, 1300000, 1500000, 1800000,
+};
+
+static int mt6323_get_status(struct regulator_dev *rdev)
+{
+ int ret;
+ u32 regval;
+ struct mt6323_regulator_info *info = rdev_get_drvdata(rdev);
+
+ ret = regmap_read(rdev->regmap, info->desc.enable_reg, &regval);
+ if (ret != 0) {
+ dev_err(&rdev->dev, "Failed to get enable reg: %d\n", ret);
+ return ret;
+ }
+
+ return (regval & info->qi) ? REGULATOR_STATUS_ON : REGULATOR_STATUS_OFF;
+}
+
+static int mt6323_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode)
+{
+ int ret, val = 0;
+ struct mt6323_regulator_info *info = rdev_get_drvdata(rdev);
+
+ if (!info->modeset_mask) {
+ dev_err(&rdev->dev, "regulator %s doesn't support set_mode\n",
+ info->desc.name);
+ return -EINVAL;
+ }
+
+ switch (mode) {
+ case REGULATOR_MODE_STANDBY:
+ val = MT6323_LDO_MODE_LP;
+ break;
+ case REGULATOR_MODE_NORMAL:
+ val = MT6323_LDO_MODE_NORMAL;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ val <<= ffs(info->modeset_mask) - 1;
+
+ ret = regmap_update_bits(rdev->regmap, info->modeset_reg,
+ info->modeset_mask, val);
+
+ return ret;
+}
+
+static unsigned int mt6323_ldo_get_mode(struct regulator_dev *rdev)
+{
+ unsigned int val;
+ unsigned int mode;
+ int ret;
+ struct mt6323_regulator_info *info = rdev_get_drvdata(rdev);
+
+ if (!info->modeset_mask) {
+ dev_err(&rdev->dev, "regulator %s doesn't support get_mode\n",
+ info->desc.name);
+ return -EINVAL;
+ }
+
+ ret = regmap_read(rdev->regmap, info->modeset_reg, &val);
+ if (ret < 0)
+ return ret;
+
+ val &= info->modeset_mask;
+ val >>= ffs(info->modeset_mask) - 1;
+
+ if (val & 0x1)
+ mode = REGULATOR_MODE_STANDBY;
+ else
+ mode = REGULATOR_MODE_NORMAL;
+
+ return mode;
+}
+
+static struct regulator_ops mt6323_volt_range_ops = {
+ .list_voltage = regulator_list_voltage_linear_range,
+ .map_voltage = regulator_map_voltage_linear_range,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .is_enabled = regulator_is_enabled_regmap,
+ .get_status = mt6323_get_status,
+};
+
+static struct regulator_ops mt6323_volt_table_ops = {
+ .list_voltage = regulator_list_voltage_table,
+ .map_voltage = regulator_map_voltage_iterate,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .is_enabled = regulator_is_enabled_regmap,
+ .get_status = mt6323_get_status,
+ .set_mode = mt6323_ldo_set_mode,
+ .get_mode = mt6323_ldo_get_mode,
+};
+
+static struct regulator_ops mt6323_volt_fixed_ops = {
+ .list_voltage = regulator_list_voltage_linear,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .is_enabled = regulator_is_enabled_regmap,
+ .get_status = mt6323_get_status,
+ .set_mode = mt6323_ldo_set_mode,
+ .get_mode = mt6323_ldo_get_mode,
+};
+
+/* The array is indexed by id(MT6323_ID_XXX) */
+static struct mt6323_regulator_info mt6323_regulators[] = {
+ MT6323_BUCK("buck_vproc", VPROC, 700000, 1493750, 6250,
+ buck_volt_range1, MT6323_VPROC_CON7, MT6323_VPROC_CON9, 0x7f,
+ MT6323_VPROC_CON10, MT6323_VPROC_CON5),
+ MT6323_BUCK("buck_vsys", VSYS, 1400000, 2987500, 12500,
+ buck_volt_range2, MT6323_VSYS_CON7, MT6323_VSYS_CON9, 0x7f,
+ MT6323_VSYS_CON10, MT6323_VSYS_CON5),
+ MT6323_BUCK("buck_vpa", VPA, 500000, 3650000, 50000,
+ buck_volt_range3, MT6323_VPA_CON7, MT6323_VPA_CON9,
+ 0x3f, MT6323_VPA_CON10, MT6323_VPA_CON5),
+ MT6323_REG_FIXED("ldo_vtcxo", VTCXO, MT6323_ANALDO_CON1, 10, 2800000,
+ MT6323_ANALDO_CON1, 0x2),
+ MT6323_REG_FIXED("ldo_vcn28", VCN28, MT6323_ANALDO_CON19, 12, 2800000,
+ MT6323_ANALDO_CON20, 0x2),
+ MT6323_LDO("ldo_vcn33_bt", VCN33_BT, ldo_volt_table1,
+ MT6323_ANALDO_CON16, 7, MT6323_ANALDO_CON16, 0xC,
+ MT6323_ANALDO_CON21, 0x2),
+ MT6323_LDO("ldo_vcn33_wifi", VCN33_WIFI, ldo_volt_table1,
+ MT6323_ANALDO_CON17, 12, MT6323_ANALDO_CON16, 0xC,
+ MT6323_ANALDO_CON21, 0x2),
+ MT6323_REG_FIXED("ldo_va", VA, MT6323_ANALDO_CON2, 14, 2800000,
+ MT6323_ANALDO_CON2, 0x2),
+ MT6323_LDO("ldo_vcama", VCAMA, ldo_volt_table2,
+ MT6323_ANALDO_CON4, 15, MT6323_ANALDO_CON10, 0x60, -1, 0),
+ MT6323_REG_FIXED("ldo_vio28", VIO28, MT6323_DIGLDO_CON0, 14, 2800000,
+ MT6323_DIGLDO_CON0, 0x2),
+ MT6323_REG_FIXED("ldo_vusb", VUSB, MT6323_DIGLDO_CON2, 14, 3300000,
+ MT6323_DIGLDO_CON2, 0x2),
+ MT6323_LDO("ldo_vmc", VMC, ldo_volt_table3,
+ MT6323_DIGLDO_CON3, 12, MT6323_DIGLDO_CON24, 0x10,
+ MT6323_DIGLDO_CON3, 0x2),
+ MT6323_LDO("ldo_vmch", VMCH, ldo_volt_table4,
+ MT6323_DIGLDO_CON5, 14, MT6323_DIGLDO_CON26, 0x80,
+ MT6323_DIGLDO_CON5, 0x2),
+ MT6323_LDO("ldo_vemc3v3", VEMC3V3, ldo_volt_table4,
+ MT6323_DIGLDO_CON6, 14, MT6323_DIGLDO_CON27, 0x80,
+ MT6323_DIGLDO_CON6, 0x2),
+ MT6323_LDO("ldo_vgp1", VGP1, ldo_volt_table5,
+ MT6323_DIGLDO_CON7, 15, MT6323_DIGLDO_CON28, 0xE0,
+ MT6323_DIGLDO_CON7, 0x2),
+ MT6323_LDO("ldo_vgp2", VGP2, ldo_volt_table6,
+ MT6323_DIGLDO_CON8, 15, MT6323_DIGLDO_CON29, 0xE0,
+ MT6323_DIGLDO_CON8, 0x2),
+ MT6323_LDO("ldo_vgp3", VGP3, ldo_volt_table7,
+ MT6323_DIGLDO_CON9, 15, MT6323_DIGLDO_CON30, 0x60,
+ MT6323_DIGLDO_CON9, 0x2),
+ MT6323_REG_FIXED("ldo_vcn18", VCN18, MT6323_DIGLDO_CON11, 14, 1800000,
+ MT6323_DIGLDO_CON11, 0x2),
+ MT6323_LDO("ldo_vsim1", VSIM1, ldo_volt_table8,
+ MT6323_DIGLDO_CON13, 15, MT6323_DIGLDO_CON34, 0x20,
+ MT6323_DIGLDO_CON13, 0x2),
+ MT6323_LDO("ldo_vsim2", VSIM2, ldo_volt_table8,
+ MT6323_DIGLDO_CON14, 15, MT6323_DIGLDO_CON35, 0x20,
+ MT6323_DIGLDO_CON14, 0x2),
+ MT6323_REG_FIXED("ldo_vrtc", VRTC, MT6323_DIGLDO_CON15, 8, 2800000,
+ -1, 0),
+ MT6323_LDO("ldo_vcamaf", VCAMAF, ldo_volt_table5,
+ MT6323_DIGLDO_CON31, 15, MT6323_DIGLDO_CON32, 0xE0,
+ MT6323_DIGLDO_CON31, 0x2),
+ MT6323_LDO("ldo_vibr", VIBR, ldo_volt_table5,
+ MT6323_DIGLDO_CON39, 15, MT6323_DIGLDO_CON40, 0xE0,
+ MT6323_DIGLDO_CON39, 0x2),
+ MT6323_REG_FIXED("ldo_vrf18", VRF18, MT6323_DIGLDO_CON45, 15, 1825000,
+ MT6323_DIGLDO_CON45, 0x2),
+ MT6323_LDO("ldo_vm", VM, ldo_volt_table9,
+ MT6323_DIGLDO_CON47, 14, MT6323_DIGLDO_CON48, 0x30,
+ MT6323_DIGLDO_CON47, 0x2),
+ MT6323_REG_FIXED("ldo_vio18", VIO18, MT6323_DIGLDO_CON49, 14, 1800000,
+ MT6323_DIGLDO_CON49, 0x2),
+ MT6323_LDO("ldo_vcamd", VCAMD, ldo_volt_table10,
+ MT6323_DIGLDO_CON51, 14, MT6323_DIGLDO_CON52, 0x60,
+ MT6323_DIGLDO_CON51, 0x2),
+ MT6323_REG_FIXED("ldo_vcamio", VCAMIO, MT6323_DIGLDO_CON53, 14, 1800000,
+ MT6323_DIGLDO_CON53, 0x2),
+};
+
+static int mt6323_set_buck_vosel_reg(struct platform_device *pdev)
+{
+ struct mt6397_chip *mt6323 = dev_get_drvdata(pdev->dev.parent);
+ int i;
+ u32 regval;
+
+ for (i = 0; i < MT6323_MAX_REGULATOR; i++) {
+ if (mt6323_regulators[i].vselctrl_reg) {
+ if (regmap_read(mt6323->regmap,
+ mt6323_regulators[i].vselctrl_reg,
+ &regval) < 0) {
+ dev_err(&pdev->dev,
+ "Failed to read buck ctrl\n");
+ return -EIO;
+ }
+
+ if (regval & mt6323_regulators[i].vselctrl_mask) {
+ mt6323_regulators[i].desc.vsel_reg =
+ mt6323_regulators[i].vselon_reg;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int mt6323_regulator_probe(struct platform_device *pdev)
+{
+ struct mt6397_chip *mt6323 = dev_get_drvdata(pdev->dev.parent);
+ struct regulator_config config = {};
+ struct regulator_dev *rdev;
+ int i;
+ u32 reg_value;
+
+ /* Query buck controller to select activated voltage register part */
+ if (mt6323_set_buck_vosel_reg(pdev))
+ return -EIO;
+
+ /* Read PMIC chip revision to update constraints and voltage table */
+ if (regmap_read(mt6323->regmap, MT6323_CID, &reg_value) < 0) {
+ dev_err(&pdev->dev, "Failed to read Chip ID\n");
+ return -EIO;
+ }
+ dev_info(&pdev->dev, "Chip ID = 0x%x\n", reg_value);
+
+ for (i = 0; i < MT6323_MAX_REGULATOR; i++) {
+ config.dev = &pdev->dev;
+ config.driver_data = &mt6323_regulators[i];
+ config.regmap = mt6323->regmap;
+ rdev = devm_regulator_register(&pdev->dev,
+ &mt6323_regulators[i].desc, &config);
+ if (IS_ERR(rdev)) {
+ dev_err(&pdev->dev, "failed to register %s\n",
+ mt6323_regulators[i].desc.name);
+ return PTR_ERR(rdev);
+ }
+ }
+ return 0;
+}
+
+static const struct platform_device_id mt6323_platform_ids[] = {
+ {"mt6323-regulator", 0},
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(platform, mt6323_platform_ids);
+
+static const struct of_device_id mt6323_of_match[] = {
+ { .compatible = "mediatek,mt6323-regulator", },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, mt6323_of_match);
+
+static struct platform_driver mt6323_regulator_driver = {
+ .driver = {
+ .name = "mt6323-regulator",
+ .of_match_table = of_match_ptr(mt6323_of_match),
+ },
+ .probe = mt6323_regulator_probe,
+ .id_table = mt6323_platform_ids,
+};
+
+module_platform_driver(mt6323_regulator_driver);
+
+MODULE_AUTHOR("Chen Zhong <chen.zhong@mediatek.com>");
+MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6397 PMIC");
+MODULE_LICENSE("GPL v2");
--- /dev/null
+++ b/include/linux/regulator/mt6323-regulator.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2016 MediaTek Inc.
+ * Author: Chen Zhong <chen.zhong@mediatek.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __LINUX_REGULATOR_MT6323_H
+#define __LINUX_REGULATOR_MT6323_H
+
+enum {
+ MT6323_ID_VPROC = 0,
+ MT6323_ID_VSYS,
+ MT6323_ID_VPA,
+ MT6323_ID_VTCXO,
+ MT6323_ID_VCN28,
+ MT6323_ID_VCN33_BT,
+ MT6323_ID_VCN33_WIFI,
+ MT6323_ID_VA,
+ MT6323_ID_VCAMA,
+ MT6323_ID_VIO28 = 9,
+ MT6323_ID_VUSB,
+ MT6323_ID_VMC,
+ MT6323_ID_VMCH,
+ MT6323_ID_VEMC3V3,
+ MT6323_ID_VGP1,
+ MT6323_ID_VGP2,
+ MT6323_ID_VGP3,
+ MT6323_ID_VCN18,
+ MT6323_ID_VSIM1,
+ MT6323_ID_VSIM2,
+ MT6323_ID_VRTC,
+ MT6323_ID_VCAMAF,
+ MT6323_ID_VIBR,
+ MT6323_ID_VRF18,
+ MT6323_ID_VM,
+ MT6323_ID_VIO18,
+ MT6323_ID_VCAMD,
+ MT6323_ID_VCAMIO,
+ MT6323_ID_RG_MAX,
+};
+
+#define MT6323_MAX_REGULATOR MT6323_ID_RG_MAX
+
+#endif /* __LINUX_REGULATOR_MT6323_H */
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