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Message-Id: <1620036917-19040-2-git-send-email-u0084500@gmail.com>
Date: Mon, 3 May 2021 18:15:17 +0800
From: cy_huang <u0084500@...il.com>
To: lgirdwood@...il.com, broonie@...nel.org, robh+dt@...nel.org
Cc: linux-kernel@...r.kernel.org, cy_huang@...htek.com,
devicetree@...r.kernel.org
Subject: [PATCH v1 2/2] regulator: rt6160: Add support for Richtek RT6160
From: ChiYuan Huang <cy_huang@...htek.com>
Add support for Richtek RT6160 voltage regulator. It can provide up
to 3A output current within the adjustable voltage from 2025mV
to 5200mV. It integrate a buck-boost converter to support wide input
voltage range from 2200mV to 5500mV.
Signed-off-by: ChiYuan Huang <cy_huang@...htek.com>
---
drivers/regulator/Kconfig | 11 ++
drivers/regulator/Makefile | 1 +
drivers/regulator/rt6160-regulator.c | 265 +++++++++++++++++++++++++++++++++++
3 files changed, 277 insertions(+)
create mode 100644 drivers/regulator/rt6160-regulator.c
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 9d84d92..4fe7ddc 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -1030,6 +1030,17 @@ config REGULATOR_RT5033
RT5033 PMIC. The device supports multiple regulators like
current source, LDO and Buck.
+config REGULATOR_RT6160
+ tristate "Richtek RT6160 BuckBoost voltage regulator"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ This adds support for voltage regulator in Richtek RT6160.
+ This device automatically change voltage output mode from
+ Buck or Boost. The mode transistion depend on the input source voltage.
+ The wide output range is from 2025mV to 5200mV and can be used on most
+ common application scenario.
+
config REGULATOR_RTMV20
tristate "RTMV20 Laser Diode Regulator"
depends on I2C
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 580b015..5b2c93e 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -124,6 +124,7 @@ obj-$(CONFIG_REGULATOR_ROHM) += rohm-regulator.o
obj-$(CONFIG_REGULATOR_RT4801) += rt4801-regulator.o
obj-$(CONFIG_REGULATOR_RT4831) += rt4831-regulator.o
obj-$(CONFIG_REGULATOR_RT5033) += rt5033-regulator.o
+obj-$(CONFIG_REGULATOR_RT6160) += rt6160-regulator.o
obj-$(CONFIG_REGULATOR_RTMV20) += rtmv20-regulator.o
obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o
obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o
diff --git a/drivers/regulator/rt6160-regulator.c b/drivers/regulator/rt6160-regulator.c
new file mode 100644
index 00000000..b4bf247
--- /dev/null
+++ b/drivers/regulator/rt6160-regulator.c
@@ -0,0 +1,265 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+
+#define RT6160_MODE_AUTO 0
+#define RT6160_MODE_FPWM 1
+
+#define RT6160_REG_CNTL 0x01
+#define RT6160_REG_STATUS 0x02
+#define RT6160_REG_DEVID 0x03
+#define RT6160_REG_VSELL 0x04
+#define RT6160_REG_VSELH 0x05
+
+#define RT6160_FPWM_MASK BIT(3)
+#define RT6160_RAMPRATE_MASK GENMASK(1, 0)
+#define RT6160_VID_MASK GENMASK(7, 4)
+#define RT6160_VSEL_MASK GENMASK(6, 0)
+#define RT6160_HDSTAT_MASK BIT(4)
+#define RT6160_UVSTAT_MASK BIT(3)
+#define RT6160_OCSTAT_MASK BIT(2)
+#define RT6160_TSDSTAT_MASK BIT(1)
+#define RT6160_PGSTAT_MASK BIT(0)
+
+#define RT6160_RAMPRATE_1VMS 0
+#define RT6160_RAMPRATE_2P5VMS 1
+#define RT6160_RAMPRATE_5VMS 2
+#define RT6160_RAMPRATE_10VMS 3
+#define RT6160_VENDOR_ID 0xA0
+#define RT6160_VOUT_MINUV 2025000
+#define RT6160_VOUT_MAXUV 5200000
+#define RT6160_VOUT_STPUV 25000
+#define RT6160_N_VOUTS ((RT6160_VOUT_MAXUV - RT6160_VOUT_MINUV) / RT6160_VOUT_STPUV + 1)
+
+struct rt6160_priv {
+ struct regulator_desc desc;
+ bool vsel_active_low;
+};
+
+static int rt6160_set_mode(struct regulator_dev *rdev, unsigned int mode)
+{
+ struct regmap *regmap = rdev_get_regmap(rdev);
+ unsigned int mode_val;
+
+ switch (mode) {
+ case REGULATOR_MODE_FAST:
+ mode_val = RT6160_FPWM_MASK;
+ break;
+ case REGULATOR_MODE_NORMAL:
+ mode_val = 0;
+ break;
+ default:
+ dev_err(&rdev->dev, "mode not supported\n");
+ return -EINVAL;
+ }
+
+ return regmap_update_bits(regmap, RT6160_REG_CNTL, RT6160_FPWM_MASK, mode_val);
+}
+
+static unsigned int rt6160_get_mode(struct regulator_dev *rdev)
+{
+ struct regmap *regmap = rdev_get_regmap(rdev);
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(regmap, RT6160_REG_CNTL, &val);
+ if (ret)
+ return ret;
+
+ if (val & RT6160_FPWM_MASK)
+ return REGULATOR_MODE_FAST;
+
+ return REGULATOR_MODE_NORMAL;
+}
+
+static int rt6160_set_suspend_voltage(struct regulator_dev *rdev, int uV)
+{
+ struct rt6160_priv *priv = rdev_get_drvdata(rdev);
+ struct regmap *regmap = rdev_get_regmap(rdev);
+ unsigned int reg = RT6160_REG_VSELH;
+ int vsel;
+
+ vsel = regulator_map_voltage_linear(rdev, uV, uV);
+ if (vsel < 0)
+ return vsel;
+
+ if (priv->vsel_active_low)
+ reg = RT6160_REG_VSELL;
+
+ return regmap_update_bits(regmap, reg, RT6160_VSEL_MASK, vsel);
+}
+
+static int rt6160_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
+{
+ struct regmap *regmap = rdev_get_regmap(rdev);
+ unsigned int ramp_value = RT6160_RAMPRATE_1VMS;
+
+ switch (ramp_delay) {
+ case 1 ... 1000:
+ ramp_value = RT6160_RAMPRATE_1VMS;
+ break;
+ case 1001 ... 2500:
+ ramp_value = RT6160_RAMPRATE_2P5VMS;
+ break;
+ case 2501 ... 5000:
+ ramp_value = RT6160_RAMPRATE_5VMS;
+ break;
+ case 5001 ... 10000:
+ ramp_value = RT6160_RAMPRATE_10VMS;
+ break;
+ default:
+ dev_warn(&rdev->dev, "ramp_delay %d not supported, setting 1000\n", ramp_delay);
+ }
+
+ return regmap_update_bits(regmap, RT6160_REG_CNTL, RT6160_RAMPRATE_MASK, ramp_value);
+}
+
+static int rt6160_get_error_flags(struct regulator_dev *rdev, unsigned int *flags)
+{
+ struct regmap *regmap = rdev_get_regmap(rdev);
+ unsigned int val, events = 0;
+ int ret;
+
+ ret = regmap_read(regmap, RT6160_REG_STATUS, &val);
+ if (ret)
+ return ret;
+
+ if (val & (RT6160_HDSTAT_MASK | RT6160_TSDSTAT_MASK))
+ events |= REGULATOR_ERROR_OVER_TEMP;
+
+ if (val & RT6160_UVSTAT_MASK)
+ events |= REGULATOR_ERROR_UNDER_VOLTAGE;
+
+ if (val & RT6160_OCSTAT_MASK)
+ events |= REGULATOR_ERROR_OVER_CURRENT;
+
+ if (val & RT6160_PGSTAT_MASK)
+ events |= REGULATOR_ERROR_FAIL;
+
+ *flags = events;
+ return 0;
+}
+
+static const struct regulator_ops rt6160_regulator_ops = {
+ .list_voltage = regulator_list_voltage_linear,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+
+ .set_mode = rt6160_set_mode,
+ .get_mode = rt6160_get_mode,
+ .set_suspend_voltage = rt6160_set_suspend_voltage,
+ .set_ramp_delay = rt6160_set_ramp_delay,
+ .get_error_flags = rt6160_get_error_flags,
+};
+
+static unsigned int rt6160_of_map_mode(unsigned int mode)
+{
+ if (mode == RT6160_MODE_FPWM)
+ return REGULATOR_MODE_FAST;
+ else if (mode == RT6160_MODE_AUTO)
+ return REGULATOR_MODE_NORMAL;
+
+ return REGULATOR_MODE_INVALID;
+}
+
+static bool rt6160_is_accessible_reg(struct device *dev, unsigned int reg)
+{
+ if (reg >= RT6160_REG_CNTL && reg <= RT6160_REG_VSELH)
+ return true;
+ return false;
+}
+
+static const struct regmap_config rt6160_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = RT6160_REG_VSELH,
+
+ .writeable_reg = rt6160_is_accessible_reg,
+ .readable_reg = rt6160_is_accessible_reg,
+};
+
+static int rt6160_probe(struct i2c_client *i2c)
+{
+ struct rt6160_priv *priv;
+ struct regmap *regmap;
+ struct gpio_desc *enable_gpio;
+ struct regulator_config regulator_cfg = {};
+ struct regulator_dev *rdev;
+ unsigned int devid;
+ int ret;
+
+ priv = devm_kzalloc(&i2c->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->vsel_active_low = device_property_present(&i2c->dev, "richtek,vsel_active_low");
+
+ enable_gpio = devm_gpiod_get_optional(&i2c->dev, "enable", GPIOD_OUT_HIGH);
+ if (IS_ERR(enable_gpio)) {
+ dev_err(&i2c->dev, "Failed to get 'enable' gpio\n");
+ return PTR_ERR(enable_gpio);
+ }
+
+ regmap = devm_regmap_init_i2c(i2c, &rt6160_regmap_config);
+ if (IS_ERR(regmap)) {
+ dev_err(&i2c->dev, "Failed to init regmap\n");
+ return PTR_ERR(regmap);
+ }
+
+ ret = regmap_read(regmap, RT6160_REG_DEVID, &devid);
+ if (ret)
+ return ret;
+
+ if ((devid & RT6160_VID_MASK) != RT6160_VENDOR_ID) {
+ dev_err(&i2c->dev, "VID not correct [0x%02x]\n", devid);
+ return -ENODEV;
+ }
+
+ priv->desc.name = "rt6160-buckboost";
+ priv->desc.of_match = "buckboost";
+ priv->desc.type = REGULATOR_VOLTAGE;
+ priv->desc.owner = THIS_MODULE;
+ priv->desc.min_uV = RT6160_VOUT_MINUV;
+ priv->desc.uV_step = RT6160_VOUT_STPUV;
+ priv->desc.vsel_reg = RT6160_REG_VSELH;
+ priv->desc.vsel_mask = RT6160_VSEL_MASK;
+ priv->desc.n_voltages = RT6160_N_VOUTS;
+ priv->desc.of_map_mode = rt6160_of_map_mode;
+ priv->desc.ops = &rt6160_regulator_ops;
+ if (priv->vsel_active_low)
+ priv->desc.vsel_reg = RT6160_REG_VSELL;
+
+ regulator_cfg.dev = &i2c->dev;
+ regulator_cfg.regmap = regmap;
+ regulator_cfg.driver_data = priv;
+ rdev = devm_regulator_register(&i2c->dev, &priv->desc, ®ulator_cfg);
+ if (IS_ERR(rdev)) {
+ dev_err(&i2c->dev, "Failed to register regulator\n");
+ return PTR_ERR(rdev);
+ }
+
+ return 0;
+}
+
+static const struct of_device_id rt6160_of_match_table[] = {
+ { .compatible = "richtek,rt6160", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, rt6160_of_match_table);
+
+static struct i2c_driver rt6160_driver = {
+ .driver = {
+ .name = "rt6160",
+ .of_match_table = rt6160_of_match_table,
+ },
+ .probe_new = rt6160_probe,
+};
+module_i2c_driver(rt6160_driver);
+
+MODULE_AUTHOR("ChiYuan Huang <cy_huang@...htek.com>");
+MODULE_LICENSE("GPL v2");
--
2.7.4
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