regulator: add LM363X driver
LM363X regulator driver supports LM3631 and LM3632. LM3631 has 5 regulators. LM3632 provides 3 regulators. One boost output and LDOs are used for the display module. Boost voltage is configurable but always on. Supported operations for LDOs are enabled/disabled and voltage change. Two LDOs of LM3632 can be controlled by external pins. Those are configured through the DT properties. Signed-off-by: Milo Kim <milo.kim@ti.com> Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Milo Kim
Mark Brown
parent
8005c49d9a
commit
3a8d1a73a0
|
|
@ -274,6 +274,15 @@ config REGULATOR_ISL6271A
|
|||
help
|
||||
This driver supports ISL6271A voltage regulator chip.
|
||||
|
||||
config REGULATOR_LM363X
|
||||
tristate "TI LM363X voltage regulators"
|
||||
depends on MFD_TI_LMU
|
||||
help
|
||||
This driver supports LM3631 and LM3632 voltage regulators for
|
||||
the LCD bias.
|
||||
One boost output voltage is configurable and always on.
|
||||
Other LDOs are used for the display module.
|
||||
|
||||
config REGULATOR_LP3971
|
||||
tristate "National Semiconductors LP3971 PMIC regulator driver"
|
||||
depends on I2C
|
||||
|
|
|
|||
|
|
@ -36,6 +36,7 @@ obj-$(CONFIG_REGULATOR_GPIO) += gpio-regulator.o
|
|||
obj-$(CONFIG_REGULATOR_HI6421) += hi6421-regulator.o
|
||||
obj-$(CONFIG_REGULATOR_ISL6271A) += isl6271a-regulator.o
|
||||
obj-$(CONFIG_REGULATOR_ISL9305) += isl9305.o
|
||||
obj-$(CONFIG_REGULATOR_LM363X) += lm363x-regulator.o
|
||||
obj-$(CONFIG_REGULATOR_LP3971) += lp3971.o
|
||||
obj-$(CONFIG_REGULATOR_LP3972) += lp3972.o
|
||||
obj-$(CONFIG_REGULATOR_LP872X) += lp872x.o
|
||||
|
|
|
|||
|
|
@ -0,0 +1,309 @@
|
|||
/*
|
||||
* TI LM363X Regulator Driver
|
||||
*
|
||||
* Copyright 2015 Texas Instruments
|
||||
*
|
||||
* Author: Milo Kim <milo.kim@ti.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/err.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/mfd/ti-lmu.h>
|
||||
#include <linux/mfd/ti-lmu-register.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/of_gpio.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/regulator/driver.h>
|
||||
#include <linux/regulator/of_regulator.h>
|
||||
#include <linux/slab.h>
|
||||
|
||||
/* LM3631 */
|
||||
#define LM3631_BOOST_VSEL_MAX 0x25
|
||||
#define LM3631_LDO_VSEL_MAX 0x28
|
||||
#define LM3631_CONT_VSEL_MAX 0x03
|
||||
#define LM3631_VBOOST_MIN 4500000
|
||||
#define LM3631_VCONT_MIN 1800000
|
||||
#define LM3631_VLDO_MIN 4000000
|
||||
#define ENABLE_TIME_USEC 1000
|
||||
|
||||
/* LM3632 */
|
||||
#define LM3632_BOOST_VSEL_MAX 0x26
|
||||
#define LM3632_LDO_VSEL_MAX 0x29
|
||||
#define LM3632_VBOOST_MIN 4500000
|
||||
#define LM3632_VLDO_MIN 4000000
|
||||
|
||||
/* Common */
|
||||
#define LM363X_STEP_50mV 50000
|
||||
#define LM363X_STEP_500mV 500000
|
||||
|
||||
struct lm363x_regulator {
|
||||
struct regmap *regmap;
|
||||
struct regulator_dev *regulator;
|
||||
};
|
||||
|
||||
const int ldo_cont_enable_time[] = {
|
||||
0, 2000, 5000, 10000, 20000, 50000, 100000, 200000,
|
||||
};
|
||||
|
||||
static int lm363x_regulator_enable_time(struct regulator_dev *rdev)
|
||||
{
|
||||
struct lm363x_regulator *lm363x_regulator = rdev_get_drvdata(rdev);
|
||||
enum lm363x_regulator_id id = rdev_get_id(rdev);
|
||||
u8 val, addr, mask;
|
||||
|
||||
switch (id) {
|
||||
case LM3631_LDO_CONT:
|
||||
addr = LM3631_REG_ENTIME_VCONT;
|
||||
mask = LM3631_ENTIME_CONT_MASK;
|
||||
break;
|
||||
case LM3631_LDO_OREF:
|
||||
addr = LM3631_REG_ENTIME_VOREF;
|
||||
mask = LM3631_ENTIME_MASK;
|
||||
break;
|
||||
case LM3631_LDO_POS:
|
||||
addr = LM3631_REG_ENTIME_VPOS;
|
||||
mask = LM3631_ENTIME_MASK;
|
||||
break;
|
||||
case LM3631_LDO_NEG:
|
||||
addr = LM3631_REG_ENTIME_VNEG;
|
||||
mask = LM3631_ENTIME_MASK;
|
||||
break;
|
||||
default:
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (regmap_read(lm363x_regulator->regmap, addr, (unsigned int *)&val))
|
||||
return -EINVAL;
|
||||
|
||||
val = (val & mask) >> LM3631_ENTIME_SHIFT;
|
||||
|
||||
if (id == LM3631_LDO_CONT)
|
||||
return ldo_cont_enable_time[val];
|
||||
else
|
||||
return ENABLE_TIME_USEC * val;
|
||||
}
|
||||
|
||||
static struct regulator_ops lm363x_boost_voltage_table_ops = {
|
||||
.list_voltage = regulator_list_voltage_linear,
|
||||
.set_voltage_sel = regulator_set_voltage_sel_regmap,
|
||||
.get_voltage_sel = regulator_get_voltage_sel_regmap,
|
||||
};
|
||||
|
||||
static struct regulator_ops lm363x_regulator_voltage_table_ops = {
|
||||
.list_voltage = regulator_list_voltage_linear,
|
||||
.set_voltage_sel = regulator_set_voltage_sel_regmap,
|
||||
.get_voltage_sel = regulator_get_voltage_sel_regmap,
|
||||
.enable = regulator_enable_regmap,
|
||||
.disable = regulator_disable_regmap,
|
||||
.is_enabled = regulator_is_enabled_regmap,
|
||||
.enable_time = lm363x_regulator_enable_time,
|
||||
};
|
||||
|
||||
static const struct regulator_desc lm363x_regulator_desc[] = {
|
||||
/* LM3631 */
|
||||
{
|
||||
.name = "vboost",
|
||||
.of_match = "vboost",
|
||||
.id = LM3631_BOOST,
|
||||
.ops = &lm363x_boost_voltage_table_ops,
|
||||
.n_voltages = LM3631_BOOST_VSEL_MAX + 1,
|
||||
.min_uV = LM3631_VBOOST_MIN,
|
||||
.uV_step = LM363X_STEP_50mV,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
.owner = THIS_MODULE,
|
||||
.vsel_reg = LM3631_REG_VOUT_BOOST,
|
||||
.vsel_mask = LM3631_VOUT_MASK,
|
||||
},
|
||||
{
|
||||
.name = "ldo_cont",
|
||||
.of_match = "vcont",
|
||||
.id = LM3631_LDO_CONT,
|
||||
.ops = &lm363x_regulator_voltage_table_ops,
|
||||
.n_voltages = LM3631_CONT_VSEL_MAX + 1,
|
||||
.min_uV = LM3631_VCONT_MIN,
|
||||
.uV_step = LM363X_STEP_500mV,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
.owner = THIS_MODULE,
|
||||
.vsel_reg = LM3631_REG_VOUT_CONT,
|
||||
.vsel_mask = LM3631_VOUT_CONT_MASK,
|
||||
.enable_reg = LM3631_REG_LDO_CTRL2,
|
||||
.enable_mask = LM3631_EN_CONT_MASK,
|
||||
},
|
||||
{
|
||||
.name = "ldo_oref",
|
||||
.of_match = "voref",
|
||||
.id = LM3631_LDO_OREF,
|
||||
.ops = &lm363x_regulator_voltage_table_ops,
|
||||
.n_voltages = LM3631_LDO_VSEL_MAX + 1,
|
||||
.min_uV = LM3631_VLDO_MIN,
|
||||
.uV_step = LM363X_STEP_50mV,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
.owner = THIS_MODULE,
|
||||
.vsel_reg = LM3631_REG_VOUT_OREF,
|
||||
.vsel_mask = LM3631_VOUT_MASK,
|
||||
.enable_reg = LM3631_REG_LDO_CTRL1,
|
||||
.enable_mask = LM3631_EN_OREF_MASK,
|
||||
},
|
||||
{
|
||||
.name = "ldo_vpos",
|
||||
.of_match = "vpos",
|
||||
.id = LM3631_LDO_POS,
|
||||
.ops = &lm363x_regulator_voltage_table_ops,
|
||||
.n_voltages = LM3631_LDO_VSEL_MAX + 1,
|
||||
.min_uV = LM3631_VLDO_MIN,
|
||||
.uV_step = LM363X_STEP_50mV,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
.owner = THIS_MODULE,
|
||||
.vsel_reg = LM3631_REG_VOUT_POS,
|
||||
.vsel_mask = LM3631_VOUT_MASK,
|
||||
.enable_reg = LM3631_REG_LDO_CTRL1,
|
||||
.enable_mask = LM3631_EN_VPOS_MASK,
|
||||
},
|
||||
{
|
||||
.name = "ldo_vneg",
|
||||
.of_match = "vneg",
|
||||
.id = LM3631_LDO_NEG,
|
||||
.ops = &lm363x_regulator_voltage_table_ops,
|
||||
.n_voltages = LM3631_LDO_VSEL_MAX + 1,
|
||||
.min_uV = LM3631_VLDO_MIN,
|
||||
.uV_step = LM363X_STEP_50mV,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
.owner = THIS_MODULE,
|
||||
.vsel_reg = LM3631_REG_VOUT_NEG,
|
||||
.vsel_mask = LM3631_VOUT_MASK,
|
||||
.enable_reg = LM3631_REG_LDO_CTRL1,
|
||||
.enable_mask = LM3631_EN_VNEG_MASK,
|
||||
},
|
||||
/* LM3632 */
|
||||
{
|
||||
.name = "vboost",
|
||||
.of_match = "vboost",
|
||||
.id = LM3632_BOOST,
|
||||
.ops = &lm363x_boost_voltage_table_ops,
|
||||
.n_voltages = LM3632_BOOST_VSEL_MAX + 1,
|
||||
.min_uV = LM3632_VBOOST_MIN,
|
||||
.uV_step = LM363X_STEP_50mV,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
.owner = THIS_MODULE,
|
||||
.vsel_reg = LM3632_REG_VOUT_BOOST,
|
||||
.vsel_mask = LM3632_VOUT_MASK,
|
||||
},
|
||||
{
|
||||
.name = "ldo_vpos",
|
||||
.of_match = "vpos",
|
||||
.id = LM3632_LDO_POS,
|
||||
.ops = &lm363x_regulator_voltage_table_ops,
|
||||
.n_voltages = LM3632_LDO_VSEL_MAX + 1,
|
||||
.min_uV = LM3632_VLDO_MIN,
|
||||
.uV_step = LM363X_STEP_50mV,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
.owner = THIS_MODULE,
|
||||
.vsel_reg = LM3632_REG_VOUT_POS,
|
||||
.vsel_mask = LM3632_VOUT_MASK,
|
||||
.enable_reg = LM3632_REG_BIAS_CONFIG,
|
||||
.enable_mask = LM3632_EN_VPOS_MASK,
|
||||
},
|
||||
{
|
||||
.name = "ldo_vneg",
|
||||
.of_match = "vneg",
|
||||
.id = LM3632_LDO_NEG,
|
||||
.ops = &lm363x_regulator_voltage_table_ops,
|
||||
.n_voltages = LM3632_LDO_VSEL_MAX + 1,
|
||||
.min_uV = LM3632_VLDO_MIN,
|
||||
.uV_step = LM363X_STEP_50mV,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
.owner = THIS_MODULE,
|
||||
.vsel_reg = LM3632_REG_VOUT_NEG,
|
||||
.vsel_mask = LM3632_VOUT_MASK,
|
||||
.enable_reg = LM3632_REG_BIAS_CONFIG,
|
||||
.enable_mask = LM3632_EN_VNEG_MASK,
|
||||
},
|
||||
};
|
||||
|
||||
static int lm363x_regulator_of_get_enable_gpio(struct device_node *np, int id)
|
||||
{
|
||||
/*
|
||||
* Check LCM_EN1/2_GPIO is configured.
|
||||
* Those pins are used for enabling VPOS/VNEG LDOs.
|
||||
*/
|
||||
switch (id) {
|
||||
case LM3632_LDO_POS:
|
||||
return of_get_named_gpio(np, "ti,lcm-en1-gpio", 0);
|
||||
case LM3632_LDO_NEG:
|
||||
return of_get_named_gpio(np, "ti,lcm-en2-gpio", 0);
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
static int lm363x_regulator_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct ti_lmu *lmu = dev_get_drvdata(pdev->dev.parent);
|
||||
struct lm363x_regulator *lm363x_regulator;
|
||||
struct regmap *regmap = lmu->regmap;
|
||||
struct regulator_config cfg = { };
|
||||
struct regulator_dev *rdev;
|
||||
struct device *dev = &pdev->dev;
|
||||
int id = pdev->id;
|
||||
int ret, ena_gpio;
|
||||
|
||||
lm363x_regulator = devm_kzalloc(dev, sizeof(*lm363x_regulator),
|
||||
GFP_KERNEL);
|
||||
if (!lm363x_regulator)
|
||||
return -ENOMEM;
|
||||
|
||||
lm363x_regulator->regmap = regmap;
|
||||
|
||||
cfg.dev = dev;
|
||||
cfg.driver_data = lm363x_regulator;
|
||||
cfg.regmap = regmap;
|
||||
|
||||
/*
|
||||
* LM3632 LDOs can be controlled by external pin.
|
||||
* Register update is required if the pin is used.
|
||||
*/
|
||||
ena_gpio = lm363x_regulator_of_get_enable_gpio(dev->of_node, id);
|
||||
if (gpio_is_valid(ena_gpio)) {
|
||||
cfg.ena_gpio = ena_gpio;
|
||||
cfg.ena_gpio_flags = GPIOF_OUT_INIT_LOW;
|
||||
|
||||
ret = regmap_update_bits(regmap, LM3632_REG_BIAS_CONFIG,
|
||||
LM3632_EXT_EN_MASK,
|
||||
LM3632_EXT_EN_MASK);
|
||||
if (ret) {
|
||||
dev_err(dev, "External pin err: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
rdev = devm_regulator_register(dev, &lm363x_regulator_desc[id], &cfg);
|
||||
if (IS_ERR(rdev)) {
|
||||
ret = PTR_ERR(rdev);
|
||||
dev_err(dev, "[%d] regulator register err: %d\n", id, ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
lm363x_regulator->regulator = rdev;
|
||||
platform_set_drvdata(pdev, lm363x_regulator);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver lm363x_regulator_driver = {
|
||||
.probe = lm363x_regulator_probe,
|
||||
.driver = {
|
||||
.name = "lm363x-regulator",
|
||||
},
|
||||
};
|
||||
|
||||
module_platform_driver(lm363x_regulator_driver);
|
||||
|
||||
MODULE_DESCRIPTION("TI LM363X Regulator Driver");
|
||||
MODULE_AUTHOR("Milo Kim");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_ALIAS("platform:lm363x-regulator");
|
||||
Loading…
Reference in New Issue