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build/patch/kernel/archive/rockchip64-6.1/regulator-add-fan53200-driver.patch

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From 43231f566634df693fa20b677a84850750829d3d Mon Sep 17 00:00:00 2001
From: Rock Shen <rock_shen@asus.com>
Date: Tue, 27 Apr 2021 11:13:25 +0800
Subject: [PATCH] regulator: add fan53200 regulator driver for Tinekr Board 2
1. Add fan53200 regulator support for vdd_cpu_b & vdd_gpu
2. By Tinker2 HW design, Vsel gpio pin polarity was reversed, switch
sleep_reg & vol_reg at fan53200_voltages_setup_fairchild
3. Use vsel0 as suspend source, vsel1 as normal source
Signed-off-by: Rock Shen <rock_shen@asus.com>
---
arch/arm64/configs/defconfig | 1 +
drivers/regulator/Kconfig | 11 +
drivers/regulator/Makefile | 1 +
drivers/regulator/fan53200.c | 519 +++++++++++++++++++++++++++++++++++++++++++
4 files changed, 532 insertions(+)
create mode 100644 drivers/regulator/fan53200.c
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 5cfe3cf..38cbba4 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -583,6 +583,7 @@ CONFIG_REGULATOR_AXP20X=y
CONFIG_REGULATOR_BD718XX=y
CONFIG_REGULATOR_BD9571MWV=y
CONFIG_REGULATOR_FAN53555=y
+CONFIG_REGULATOR_FAN53200=y
CONFIG_REGULATOR_GPIO=y
CONFIG_REGULATOR_HI6421V530=y
CONFIG_REGULATOR_HI655X=y
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 020a00d..4ec41c5 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -356,6 +356,17 @@ config REGULATOR_FAN53880
(PMIC), it is controlled by I2C and provides one BUCK, one BOOST
and four LDO outputs.
+config REGULATOR_FAN53200
+ tristate "Fairchild FAN53200 Regulator"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ This driver supports Fairchild FAN53200 Digitally Programmable
+ TinyBuck Regulator. The FAN53200 is a step-down switching voltage
+ regulator that delivers a digitally programmable output from an
+ input voltage supply of 2.5V to 5.5V. The output voltage is
+ programmed through an I2C interface.
+
config REGULATOR_GPIO
tristate "GPIO regulator support"
depends on GPIOLIB || COMPILE_TEST
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 6ebae51..9d6ea41 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -44,6 +44,7 @@ obj-$(CONFIG_REGULATOR_DBX500_PRCMU) += dbx500-prcmu.o
obj-$(CONFIG_REGULATOR_DB8500_PRCMU) += db8500-prcmu.o
obj-$(CONFIG_REGULATOR_FAN53555) += fan53555.o
obj-$(CONFIG_REGULATOR_FAN53880) += fan53880.o
+obj-$(CONFIG_REGULATOR_FAN53555) += fan53200.o
obj-$(CONFIG_REGULATOR_GPIO) += gpio-regulator.o
obj-$(CONFIG_REGULATOR_HI6421) += hi6421-regulator.o
obj-$(CONFIG_REGULATOR_HI6421V530) += hi6421v530-regulator.o
diff --git a/drivers/regulator/fan53200.c b/drivers/regulator/fan53200.c
new file mode 100644
index 0000000..e40570b
--- /dev/null
+++ b/drivers/regulator/fan53200.c
@@ -0,0 +1,519 @@
+/*
+ * FAN53200 Fairchild Digitally Programmable TinyBuck Regulator Driver.
+ *
+ * Supported Part Numbers:
+ * FAN53200UC35X/44X
+ *
+ * Copyright (c) 2021 ASUSTeK Computer Inc.
+ * Rock Shen <rock_shen@asus.com>
+ *
+ * This package 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/param.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/of_device.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+
+/* Voltage setting */
+#define FAN53200_VSEL0 0x00
+#define FAN53200_VSEL1 0x01
+
+/* Control register */
+#define FAN53200_CONTROL 0x02
+/* IC Type */
+#define FAN53200_ID1 0x03
+/* IC mask version */
+#define FAN53200_ID2 0x04
+
+/* VSEL bit definitions */
+#define VSEL_BUCK_EN (1 << 7)
+#define VSEL_MODE (1 << 6)
+#define VSEL_NSEL_MASK 0x3F
+/* Chip ID and Verison */
+#define DIE_ID 0x0F /* ID1 */
+#define DIE_REV 0x0F /* ID2 */
+/* Control bit definitions */
+#define CTL_OUTPUT_DISCHG (1 << 7)
+#define CTL_SLEW_MASK (0x7 << 4)
+#define CTL_SLEW_SHIFT 4
+#define CTL_RESET (1 << 2)
+
+#define TCS_VSEL_NSEL_MASK 0x7f
+#define TCS_VSEL0_MODE (1 << 7)
+#define TCS_VSEL1_MODE (1 << 6)
+
+#define TCS_SLEW_SHIFT 3
+#define TCS_SLEW_MASK (0x3 < 3)
+
+#define FAN53200_NVOLTAGES 64 /* Numbers of voltages */
+
+enum fan53200_vendor {
+ FAN53200_VENDOR_FAIRCHILD = 0,
+};
+
+/* VSEL ID */
+enum {
+ FAN53200_VSEL_ID_0 = 0,
+ FAN53200_VSEL_ID_1,
+};
+
+enum {
+ FAN53200_CHIP_ID_00 = 0x8001,
+ FAN53200_CHIP_ID_01 = 0x8101,
+};
+
+struct fan53200_platform_data {
+ struct regulator_init_data *regulator;
+ unsigned int slew_rate;
+ /* Sleep VSEL ID */
+ unsigned int sleep_vsel_id;
+ struct gpio_desc *vsel_gpio;
+};
+
+struct fan53200_device_info {
+ enum fan53200_vendor vendor;
+ struct regmap *regmap;
+ struct device *dev;
+ struct regulator_desc desc;
+ struct regulator_dev *rdev;
+ struct regulator_init_data *regulator;
+ /* IC Type and Rev */
+ int chip_id;
+ int chip_rev;
+ /* Voltage setting register */
+ unsigned int vol_reg;
+ unsigned int sleep_reg;
+ unsigned int mode_reg;
+ unsigned int vol_mask;
+ unsigned int mode_mask;
+ unsigned int slew_reg;
+ unsigned int slew_mask;
+ unsigned int slew_shift;
+ /* Voltage range and step(linear) */
+ unsigned int vsel_min;
+ unsigned int vsel_step;
+ unsigned int n_voltages;
+ /* Voltage slew rate limiting */
+ unsigned int slew_rate;
+ /* Sleep voltage cache */
+ unsigned int sleep_vol_cache;
+ struct gpio_desc *vsel_gpio;
+ unsigned int sleep_vsel_id;
+};
+
+static unsigned int fan53200_map_mode(unsigned int mode)
+{
+ return mode == REGULATOR_MODE_FAST ?
+ REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL;
+}
+
+static int fan53200_set_suspend_voltage(struct regulator_dev *rdev, int uV)
+{
+ struct fan53200_device_info *di = rdev_get_drvdata(rdev);
+ int ret;
+
+ if (di->sleep_vol_cache == uV)
+ return 0;
+ ret = regulator_map_voltage_linear(rdev, uV, uV);
+ if (ret < 0)
+ return ret;
+ ret = regmap_update_bits(di->regmap, di->sleep_reg,
+ di->vol_mask, ret);
+ if (ret < 0)
+ return ret;
+ /* Cache the sleep voltage setting.
+ * Might not be the real voltage which is rounded */
+ di->sleep_vol_cache = uV;
+
+ return 0;
+}
+
+static int fan53200_set_suspend_enable(struct regulator_dev *rdev)
+{
+ struct fan53200_device_info *di = rdev_get_drvdata(rdev);
+
+ return regmap_update_bits(di->regmap, di->sleep_reg,
+ VSEL_BUCK_EN, VSEL_BUCK_EN);
+}
+
+static int fan53200_set_suspend_disable(struct regulator_dev *rdev)
+{
+ struct fan53200_device_info *di = rdev_get_drvdata(rdev);
+
+ return regmap_update_bits(di->regmap, di->sleep_reg,
+ VSEL_BUCK_EN, 0);
+}
+
+static int fan53200_set_enable(struct regulator_dev *rdev)
+{
+ struct fan53200_device_info *di = rdev_get_drvdata(rdev);
+
+ if (di->vsel_gpio) {
+ gpiod_set_raw_value(di->vsel_gpio, !di->sleep_vsel_id);
+ return 0;
+ }
+
+ return regmap_update_bits(di->regmap, di->vol_reg,
+ VSEL_BUCK_EN, VSEL_BUCK_EN);
+}
+
+static int fan53200_set_disable(struct regulator_dev *rdev)
+{
+ struct fan53200_device_info *di = rdev_get_drvdata(rdev);
+
+ if (di->vsel_gpio) {
+ gpiod_set_raw_value(di->vsel_gpio, di->sleep_vsel_id);
+ return 0;
+ }
+
+ return regmap_update_bits(di->regmap, di->vol_reg,
+ VSEL_BUCK_EN, 0);
+}
+
+static int fan53200_is_enabled(struct regulator_dev *rdev)
+{
+ struct fan53200_device_info *di = rdev_get_drvdata(rdev);
+ unsigned int val;
+ int ret = 0;
+
+ if (di->vsel_gpio) {
+ if (di->sleep_vsel_id)
+ return !gpiod_get_raw_value(di->vsel_gpio);
+ else
+ return gpiod_get_raw_value(di->vsel_gpio);
+ }
+
+ ret = regmap_read(di->regmap, di->vol_reg, &val);
+ if (ret < 0)
+ return ret;
+ if (val & VSEL_BUCK_EN)
+ return 1;
+ else
+ return 0;
+}
+
+static int fan53200_set_mode(struct regulator_dev *rdev, unsigned int mode)
+{
+ struct fan53200_device_info *di = rdev_get_drvdata(rdev);
+
+ switch (mode) {
+ case REGULATOR_MODE_FAST:
+ regmap_update_bits(di->regmap, di->mode_reg,
+ di->mode_mask, di->mode_mask);
+ break;
+ case REGULATOR_MODE_NORMAL:
+ regmap_update_bits(di->regmap, di->mode_reg, di->mode_mask, 0);
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static unsigned int fan53200_get_mode(struct regulator_dev *rdev)
+{
+ struct fan53200_device_info *di = rdev_get_drvdata(rdev);
+ unsigned int val;
+ int ret = 0;
+
+ ret = regmap_read(di->regmap, di->mode_reg, &val);
+ if (ret < 0)
+ return ret;
+ if (val & di->mode_mask)
+ return REGULATOR_MODE_FAST;
+ else
+ return REGULATOR_MODE_NORMAL;
+}
+
+static const int slew_rates[] = {
+ 80000,
+ 40000,
+ 20000,
+ 10000,
+ 5000,
+ 2500,
+ 1250,
+ 625,
+};
+
+static int fan53200_set_ramp(struct regulator_dev *rdev, int ramp)
+{
+ struct fan53200_device_info *di = rdev_get_drvdata(rdev);
+ int regval = -1, i;
+
+ for (i = 0; i < ARRAY_SIZE(slew_rates); i++) {
+ if (ramp <= slew_rates[i])
+ regval = i;
+ else
+ break;
+ }
+
+ if (regval < 0) {
+ dev_err(di->dev, "unsupported ramp value %d\n", ramp);
+ return -EINVAL;
+ }
+
+ return regmap_update_bits(di->regmap, di->slew_reg,
+ di->slew_mask, regval << di->slew_shift);
+}
+
+static struct regulator_ops fan53200_regulator_ops = {
+ .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,
+ .map_voltage = regulator_map_voltage_linear,
+ .list_voltage = regulator_list_voltage_linear,
+ .set_suspend_voltage = fan53200_set_suspend_voltage,
+ .enable = fan53200_set_enable,
+ .disable = fan53200_set_disable,
+ .is_enabled = fan53200_is_enabled,
+ .set_mode = fan53200_set_mode,
+ .get_mode = fan53200_get_mode,
+ .set_ramp_delay = fan53200_set_ramp,
+ .set_suspend_enable = fan53200_set_suspend_enable,
+ .set_suspend_disable = fan53200_set_suspend_disable,
+};
+
+static int fan53200_voltages_setup_fairchild(struct fan53200_device_info *di)
+{
+
+ if (di->sleep_vsel_id) {
+ di->sleep_reg = FAN53200_VSEL0;
+ di->vol_reg = FAN53200_VSEL1;
+ } else {
+ di->sleep_reg = FAN53200_VSEL1;
+ di->vol_reg = FAN53200_VSEL0;
+ }
+
+ /* Init voltage range and step */
+ di->vsel_min = 600000;
+ di->vsel_step = 12500;
+ di->vol_mask = VSEL_NSEL_MASK;
+ di->mode_reg = di->vol_reg;
+ di->mode_mask = VSEL_MODE;
+ di->slew_reg = FAN53200_CONTROL;
+ di->slew_mask = CTL_SLEW_MASK;
+ di->slew_shift = CTL_SLEW_SHIFT;
+ di->n_voltages = FAN53200_NVOLTAGES;
+
+ return 0;
+}
+
+/* For 00,01,03,05 options:
+ * VOUT = 0.60V + NSELx * 10mV, from 0.60 to 1.23V.
+ * For 04 option:
+ * VOUT = 0.603V + NSELx * 12.826mV, from 0.603 to 1.411V.
+ * */
+static int fan53200_device_setup(struct fan53200_device_info *di,
+ struct fan53200_platform_data *pdata)
+{
+ int ret = 0;
+
+ ret = fan53200_voltages_setup_fairchild(di);
+
+ return ret;
+}
+
+static int fan53200_regulator_register(struct fan53200_device_info *di,
+ struct regulator_config *config)
+{
+ struct regulator_desc *rdesc = &di->desc;
+
+ rdesc->name = "fan53200-reg";
+ rdesc->supply_name = "vin";
+ rdesc->ops = &fan53200_regulator_ops;
+ rdesc->type = REGULATOR_VOLTAGE;
+ rdesc->n_voltages = di->n_voltages;
+ rdesc->enable_reg = di->vol_reg;
+ rdesc->enable_mask = VSEL_BUCK_EN;
+ rdesc->min_uV = di->vsel_min;
+ rdesc->uV_step = di->vsel_step;
+ rdesc->vsel_reg = di->vol_reg;
+ rdesc->vsel_mask = di->vol_mask;
+ rdesc->owner = THIS_MODULE;
+ rdesc->enable_time = 400;
+
+ di->rdev = devm_regulator_register(di->dev, &di->desc, config);
+ return PTR_ERR_OR_ZERO(di->rdev);
+}
+
+static const struct regmap_config fan53200_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static struct fan53200_platform_data *fan53200_parse_dt(struct device *dev,
+ struct device_node *np,
+ const struct regulator_desc *desc)
+{
+ struct fan53200_platform_data *pdata;
+ int ret, flag;
+ u32 tmp;
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return NULL;
+
+ pdata->regulator = of_get_regulator_init_data(dev, np, desc);
+ pdata->regulator->constraints.initial_state = PM_SUSPEND_MEM;
+
+ ret = of_property_read_u32(np, "fcs,suspend-voltage-selector",
+ &tmp);
+ if (!ret)
+ pdata->sleep_vsel_id = tmp;
+
+ if (pdata->sleep_vsel_id)
+ flag = GPIOD_OUT_LOW;
+ else
+ flag = GPIOD_OUT_HIGH;
+
+ pdata->vsel_gpio =
+ devm_gpiod_get_index_optional(dev, "vsel", 0,
+ flag);
+ if (IS_ERR(pdata->vsel_gpio)) {
+ ret = PTR_ERR(pdata->vsel_gpio);
+ dev_err(dev, "failed to get vesl gpio (%d)\n", ret);
+ }
+
+ return pdata;
+}
+
+static const struct of_device_id fan53200_dt_ids[] = {
+ {
+ .compatible = "fcs,fan53200",
+ .data = (void *)FAN53200_VENDOR_FAIRCHILD,
+ },
+ { }
+};
+MODULE_DEVICE_TABLE(of, fan53200_dt_ids);
+
+static int fan53200_regulator_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device_node *np = client->dev.of_node;
+ struct fan53200_device_info *di;
+ struct fan53200_platform_data *pdata;
+ struct regulator_config config = { };
+ unsigned int val;
+ int ret;
+
+ di = devm_kzalloc(&client->dev, sizeof(struct fan53200_device_info),
+ GFP_KERNEL);
+ if (!di)
+ return -ENOMEM;
+
+ di->desc.of_map_mode = fan53200_map_mode;
+
+ pdata = dev_get_platdata(&client->dev);
+ if (!pdata)
+ pdata = fan53200_parse_dt(&client->dev, np, &di->desc);
+
+ if (!pdata || !pdata->regulator) {
+ dev_err(&client->dev, "Platform data not found!\n");
+ return -ENODEV;
+ }
+
+ di->vsel_gpio = pdata->vsel_gpio;
+ di->sleep_vsel_id = pdata->sleep_vsel_id;
+
+ di->regulator = pdata->regulator;
+ if (client->dev.of_node) {
+ const struct of_device_id *match;
+
+ match = of_match_device(of_match_ptr(fan53200_dt_ids),
+ &client->dev);
+ if (!match)
+ return -ENODEV;
+
+ di->vendor = (unsigned long) match->data;
+ } else {
+ /* if no ramp constraint set, get the pdata ramp_delay */
+ if (!di->regulator->constraints.ramp_delay) {
+ int slew_idx = (pdata->slew_rate & 0x7)
+ ? pdata->slew_rate : 0;
+
+ di->regulator->constraints.ramp_delay
+ = slew_rates[slew_idx];
+ }
+
+ di->vendor = id->driver_data;
+ }
+
+ di->regmap = devm_regmap_init_i2c(client, &fan53200_regmap_config);
+ if (IS_ERR(di->regmap)) {
+ dev_err(&client->dev, "Failed to allocate regmap!\n");
+ return PTR_ERR(di->regmap);
+ }
+ di->dev = &client->dev;
+ i2c_set_clientdata(client, di);
+ /* Get chip ID */
+ ret = regmap_read(di->regmap, FAN53200_ID1, &val);
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed to get chip ID!\n");
+ return ret;
+ }
+ di->chip_id = val & DIE_ID;
+ /* Get chip revision */
+ ret = regmap_read(di->regmap, FAN53200_ID2, &val);
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed to get chip Rev!\n");
+ return ret;
+ }
+ di->chip_rev = val & DIE_REV;
+ dev_info(&client->dev, "FAN53200 Option[%d] Rev[%d] Detected!\n",
+ di->chip_id, di->chip_rev);
+ /* Device init */
+ ret = fan53200_device_setup(di, pdata);
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed to setup device!\n");
+ return ret;
+ }
+ /* Register regulator */
+ config.dev = di->dev;
+ config.init_data = di->regulator;
+ config.regmap = di->regmap;
+ config.driver_data = di;
+ config.of_node = np;
+
+ ret = fan53200_regulator_register(di, &config);
+ if (ret < 0)
+ dev_err(&client->dev, "Failed to register regulator!\n");
+ return ret;
+
+}
+
+static const struct i2c_device_id fan53200_id[] = {
+ {
+ .name = "fan53200",
+ .driver_data = FAN53200_VENDOR_FAIRCHILD
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, fan53200_id);
+
+static struct i2c_driver fan53200_regulator_driver = {
+ .driver = {
+ .name = "fan53200-regulator",
+ .of_match_table = of_match_ptr(fan53200_dt_ids),
+ },
+ .probe = fan53200_regulator_probe,
+ .id_table = fan53200_id,
+};
+
+module_i2c_driver(fan53200_regulator_driver);
+
+MODULE_AUTHOR("Rock Shen <rock_shen@asus.com>");
+MODULE_DESCRIPTION("FAN53200 regulator driver");
+MODULE_LICENSE("GPL v2");
--
2.7.4
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