Unverified Commit 06d65f2d authored by Mark Brown's avatar Mark Brown
Browse files

Add Richtek RT8092 support 

Merge series from cy_huang@richtek.com:

This patch series add rt8092 regulator support.
parents 2bb20241 32a708ba

Documentation/devicetree/bindings/regulator/richtek,rt5739.yaml

+5 −0
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@@ -15,6 +15,10 @@ description: | 
  supply of 2.5V to 5.5V. It can provide up to 3.5A continuous current

  capability at over 80% high efficiency.



  The RT8092 is similar type buck converter. Compared to RT5739, it can offer

  up to 4A output current and more output voltage range to meet the application

  on most mobile products.



allOf:

  - $ref: regulator.yaml#
@@ -23,6 +27,7 @@ properties: 
    enum:

      - richtek,rt5733

      - richtek,rt5739

      - richtek,rt8092



  reg:

    maxItems: 1

drivers/regulator/Kconfig

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@@ -1403,6 +1403,15 @@ config REGULATOR_RT6245 
	  It can support up to 14A output current and adjustable output voltage

	  from 0.4375V to 1.3875V, per step 12.5mV.



config REGULATOR_RT8092

	tristate "Richtek RT8092 voltage regulator"

	depends on I2C

	select REGMAP_I2C

	help

	  The RT8092 is a peak-current mode PWM step-down DC/DC converter with

	  I2C control interface. It is capable of delivering 4A continuing

	  current over a wide input range from 2.5V to 5.5V.



config REGULATOR_RTQ2134

	tristate "Richtek RTQ2134 SubPMIC Regulator"

	depends on I2C

drivers/regulator/Makefile

+1 −0
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@@ -162,6 +162,7 @@ obj-$(CONFIG_REGULATOR_RT5759) += rt5759-regulator.o 
obj-$(CONFIG_REGULATOR_RT6160)	+= rt6160-regulator.o

obj-$(CONFIG_REGULATOR_RT6190)	+= rt6190-regulator.o

obj-$(CONFIG_REGULATOR_RT6245)	+= rt6245-regulator.o

obj-$(CONFIG_REGULATOR_RT8092)	+= rt8092.o

obj-$(CONFIG_REGULATOR_RTMV20)	+= rtmv20-regulator.o

obj-$(CONFIG_REGULATOR_RTQ2134) += rtq2134-regulator.o

obj-$(CONFIG_REGULATOR_RTQ6752)	+= rtq6752-regulator.o

drivers/regulator/rt8092.c

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// SPDX-License-Identifier: GPL-2.0+

//

// Copyright (c) 2025 Richtek Technology Corp.

//

// Author: ChiYuan Huang <cy_huang@richtek.com>



#include <linux/bitfield.h>

#include <linux/bits.h>

#include <linux/gpio/consumer.h>

#include <linux/i2c.h>

#include <linux/mod_devicetable.h>

#include <linux/module.h>

#include <linux/property.h>

#include <linux/regmap.h>

#include <linux/regulator/consumer.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/of_regulator.h>



#define RT8092_REG_MNTRPT	0x00

#define RT8092_REG_VOUTH	0x10

#define RT8092_REG_VOUTL	0x11

#define RT8092_REG_PWMMODE	0x14

#define RT8092_REG_EVENT	0x18

#define RT8092_REG_VBANKH	0x1C

#define RT8092_REG_VBANKL	0x1D

#define RT8092_REG_VBOUND	0x1E



#define RT8092_TSDEVT_MASK	BIT(7)

#define RT8092_PGEVT_MASK	BIT(0)

#define RT8092_VSEL_MASK	GENMASK(6, 0)

#define RT8092_VOUTEN_MASK	BIT(7)

#define RT8092_FPWML_MASK	BIT(7)

#define RT8092_FPWMH_MASK	BIT(6)

#define RT8092_OCPEVT_MASK	BIT(7)

#define RT8092_SCPEVT_MASK	BIT(4)

#define RT8092_VINUVEVT_MASK	BIT(1)

#define RT8092_VBANK_MASK	GENMASK(1, 0)



#define RT8092_MODE_AUTO	0

#define RT8092_MODE_FPWM	1

#define RT8092_VOUT_BASEUV	303125

#define RT8092_VOUT_STEPUV	3125

#define RT8092_VOUT_MINSEL	15

#define RT8092_NUM_VOLTS	128

#define RT8092_INITSS_US	400



static int rt8092_get_vbank_index(struct regmap *regmap, bool vsel_high, unsigned int *vbank_idx)

{

	unsigned int vbank_reg = vsel_high ? RT8092_REG_VBANKH : RT8092_REG_VBANKL;

	unsigned int index;

	int ret;



	ret = regmap_read(regmap, vbank_reg, &index);

	if (ret)

		return ret;



	*vbank_idx = FIELD_GET(RT8092_VBANK_MASK, index);

	return 0;

}



static int rt8092_set_operating_mode(struct regulator_dev *rdev, unsigned int mode)

{

	const struct regulator_desc *desc = rdev->desc;

	struct regmap *regmap = rdev_get_regmap(rdev);

	unsigned int mode_mask, mode_val;



	mode_mask = desc->vsel_reg == RT8092_REG_VOUTH ? RT8092_FPWMH_MASK : RT8092_FPWML_MASK;



	switch (mode) {

	case REGULATOR_MODE_FAST:

		mode_val = mode_mask;

		break;

	case REGULATOR_MODE_NORMAL:

		mode_val = 0;

		break;

	default:

		return -EINVAL;

	}



	return regmap_update_bits(regmap, RT8092_REG_PWMMODE, mode_mask, mode_val);

}



static unsigned int rt8092_get_operating_mode(struct regulator_dev *rdev)

{

	const struct regulator_desc *desc = rdev->desc;

	struct regmap *regmap = rdev_get_regmap(rdev);

	unsigned int mode_mask, mode_val;

	int ret;



	mode_mask = desc->vsel_reg == RT8092_REG_VOUTH ? RT8092_FPWMH_MASK : RT8092_FPWML_MASK;



	ret = regmap_read(regmap, RT8092_REG_PWMMODE, &mode_val);

	if (ret)

		return REGULATOR_MODE_INVALID;



	return mode_val & mode_mask ? REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL;

}



static int rt8092_get_error_flags(struct regulator_dev *rdev, unsigned int *flags)

{

	struct regmap *regmap = rdev_get_regmap(rdev);

	unsigned int mntrpt, evtrpt, events = 0;

	int ret;



	ret = regmap_read(regmap, RT8092_REG_MNTRPT, &mntrpt);

	if (ret)

		return ret;



	ret = regmap_read(regmap, RT8092_REG_EVENT, &evtrpt);

	if (ret)

		return ret;



	if (!(mntrpt & RT8092_PGEVT_MASK) || evtrpt & RT8092_VINUVEVT_MASK)

		events |= REGULATOR_ERROR_UNDER_VOLTAGE;



	if (mntrpt & RT8092_TSDEVT_MASK)

		events |= REGULATOR_ERROR_OVER_TEMP;



	if (evtrpt & RT8092_OCPEVT_MASK)

		events |= REGULATOR_ERROR_OVER_CURRENT;



	if (evtrpt & RT8092_SCPEVT_MASK)

		events |= REGULATOR_ERROR_FAIL;



	*flags = events;

	return 0;

}





static int rt8092_set_suspend_voltage(struct regulator_dev *rdev, int uV)

{

	const struct regulator_desc *desc = rdev->desc;

	struct regmap *regmap = rdev_get_regmap(rdev);

	unsigned int vsel_reg, vsel_val, vbank_idx;

	bool vsel_high;

	int ret;



	vsel_reg = desc->vsel_reg == RT8092_REG_VOUTH ? RT8092_REG_VOUTL : RT8092_REG_VOUTH;

	vsel_high = desc->vsel_reg == RT8092_REG_VOUTH;



	ret = rt8092_get_vbank_index(regmap, vsel_high, &vbank_idx);

	if (ret)

		return ret;



	/* VOUT  = (BASEUV + STEPUV * VSEL) * 2^vbank_idx */

	uV >>= vbank_idx;

	if (uV < RT8092_VOUT_BASEUV)

		return -EINVAL;



	vsel_val = (uV - RT8092_VOUT_BASEUV) / RT8092_VOUT_STEPUV;

	if (vsel_val < RT8092_VOUT_MINSEL || vsel_val >= RT8092_NUM_VOLTS)

		return -EINVAL;



	return regmap_update_bits(regmap, vsel_reg, RT8092_VSEL_MASK, vsel_val);

}



static int rt8092_set_suspend_enable(struct regulator_dev *rdev)

{

	const struct regulator_desc *desc = rdev->desc;

	struct regmap *regmap = rdev_get_regmap(rdev);

	unsigned int enable_reg;



	enable_reg = desc->vsel_reg == RT8092_REG_VOUTH ? RT8092_REG_VOUTL : RT8092_REG_VOUTH;

	return regmap_set_bits(regmap, enable_reg, RT8092_VOUTEN_MASK);

}



static int rt8092_set_suspend_disable(struct regulator_dev *rdev)

{

	const struct regulator_desc *desc = rdev->desc;

	struct regmap *regmap = rdev_get_regmap(rdev);

	unsigned int enable_reg;



	enable_reg = desc->vsel_reg == RT8092_REG_VOUTH ? RT8092_REG_VOUTL : RT8092_REG_VOUTH;

	return regmap_clear_bits(regmap, enable_reg, RT8092_VOUTEN_MASK);

}



static int rt8092_set_suspend_mode(struct regulator_dev *rdev, unsigned int mode)

{

	const struct regulator_desc *desc = rdev->desc;

	struct regmap *regmap = rdev_get_regmap(rdev);

	unsigned int mode_mask, mode_val;



	mode_mask = desc->vsel_reg == RT8092_REG_VOUTH ? RT8092_FPWML_MASK : RT8092_FPWMH_MASK;



	switch (mode) {

	case REGULATOR_MODE_FAST:

		mode_val = mode_mask;

		break;

	case REGULATOR_MODE_NORMAL:

		mode_val = 0;

		break;

	default:

		return -EINVAL;

	}



	return regmap_update_bits(regmap, RT8092_REG_PWMMODE, mode_mask, mode_val);

}



static const struct regulator_ops rt8092_regulator_ops = {

	.list_voltage = regulator_list_voltage_linear,

	.get_voltage_sel = regulator_get_voltage_sel_regmap,

	.set_voltage_sel = regulator_set_voltage_sel_regmap,

	.enable = regulator_enable_regmap,

	.disable = regulator_disable_regmap,

	.is_enabled = regulator_is_enabled_regmap,

	.set_mode = rt8092_set_operating_mode,

	.get_mode = rt8092_get_operating_mode,

	.get_error_flags = rt8092_get_error_flags,

	.set_suspend_voltage = rt8092_set_suspend_voltage,

	.set_suspend_enable = rt8092_set_suspend_enable,

	.set_suspend_disable = rt8092_set_suspend_disable,

	.set_suspend_mode = rt8092_set_suspend_mode,

};



static unsigned int rt8092_of_map_mode(unsigned int mode)

{

	switch (mode) {

	case RT8092_MODE_AUTO:

		return REGULATOR_MODE_NORMAL;

	case RT8092_MODE_FPWM:

		return REGULATOR_MODE_FAST;

	default:

		return REGULATOR_MODE_INVALID;

	}

}



static const struct regmap_config rt8092_regmap_cfg = {

	.name =	"rt8092",

	.reg_bits = 8,

	.val_bits = 8,

	.max_register = RT8092_REG_VBOUND,

};



static int rt8092_probe(struct i2c_client *i2c)

{

	unsigned int vbank_idx, min_uV, step_uV;

	struct regulator_config cfg = {};

	struct device *dev = &i2c->dev;

	struct regulator_desc *desc;

	struct regulator_dev *rdev;

	struct gpio_desc *enable;

	struct regmap *regmap;

	bool vsel_high;

	int ret;



	desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);

	if (!desc)

		return -ENOMEM;



	enable = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_HIGH);

	if (IS_ERR(enable))

		return dev_err_probe(dev, PTR_ERR(enable), "Failed get 'enable' gpio\n");



	regmap = devm_regmap_init_i2c(i2c, &rt8092_regmap_cfg);

	if (IS_ERR(regmap))

		return dev_err_probe(dev, PTR_ERR(regmap), "Failed to init regmap\n");



	vsel_high = device_property_read_bool(dev, "richtek,vsel-active-high");



	ret = rt8092_get_vbank_index(regmap, vsel_high, &vbank_idx);

	if (ret)

		return dev_err_probe(dev, ret, "Failed to get VOUT bank index\n");



	/*

	 * step VOUT = STEP_UV * 2^vbank_idx

	 * min VOUT  = (BASEUV + STEPUV * VMIN_SEL) * 2^vbank_idx

	 */

	step_uV = RT8092_VOUT_STEPUV << vbank_idx;

	min_uV = (RT8092_VOUT_BASEUV + RT8092_VOUT_STEPUV * RT8092_VOUT_MINSEL) << vbank_idx;



	desc->name = "rt8092";

	desc->owner = THIS_MODULE;

	desc->type = REGULATOR_VOLTAGE;

	desc->ops = &rt8092_regulator_ops;

	desc->n_voltages = RT8092_NUM_VOLTS;

	desc->min_uV = min_uV;

	desc->uV_step = step_uV;

	desc->linear_min_sel = RT8092_VOUT_MINSEL;

	desc->enable_reg = desc->vsel_reg = vsel_high ? RT8092_REG_VOUTH : RT8092_REG_VOUTL;

	desc->vsel_mask = RT8092_VSEL_MASK;

	desc->enable_mask = RT8092_VOUTEN_MASK;

	desc->enable_time = RT8092_INITSS_US;

	desc->of_map_mode = rt8092_of_map_mode;



	cfg.dev = dev;

	cfg.of_node = dev_of_node(dev);

	cfg.init_data = of_get_regulator_init_data(dev, dev_of_node(dev), desc);



	rdev = devm_regulator_register(dev, desc, &cfg);

	if (IS_ERR(rdev))

		return dev_err_probe(dev, PTR_ERR(rdev), "Failed to register regulator\n");



	return 0;

}



static const struct of_device_id rt8092_device_tables[] = {

	{ .compatible = "richtek,rt8092" },

	{}

};

MODULE_DEVICE_TABLE(of, rt8092_device_tables);



static struct i2c_driver rt8092_driver = {

	.driver = {

		.name = "rt8092",

		.of_match_table = rt8092_device_tables,

	},

	.probe = rt8092_probe,

};

module_i2c_driver(rt8092_driver);



MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");

MODULE_DESCRIPTION("Richtek RT8092 Regulator Driver");

MODULE_LICENSE("GPL");