// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for TPS65218 Integrated power management chipsets
*
* Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com/
*/
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/regmap.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tps65218.h>
#define TPS65218_PASSWORD_REGS_UNLOCK 0x7D
static const struct mfd_cell tps65218_cells[] = {
{
.name = "tps65218-pwrbutton",
.of_compatible = "ti,tps65218-pwrbutton",
},
{
.name = "tps65218-gpio",
.of_compatible = "ti,tps65218-gpio",
},
{ .name = "tps65218-regulator", },
};
/**
* tps65218_reg_write: Write a single tps65218 register.
*
* @tps: Device to write to.
* @reg: Register to write to.
* @val: Value to write.
* @level: Password protected level
*/
int tps65218_reg_write(struct tps65218 *tps, unsigned int reg,
unsigned int val, unsigned int level)
{
int ret;
unsigned int xor_reg_val;
switch (level) {
case TPS65218_PROTECT_NONE:
return regmap_write(tps->regmap, reg, val);
case TPS65218_PROTECT_L1:
xor_reg_val = reg ^ TPS65218_PASSWORD_REGS_UNLOCK;
ret = regmap_write(tps->regmap, TPS65218_REG_PASSWORD,
xor_reg_val);
if (ret < 0)
return ret;
return regmap_write(tps->regmap, reg, val);
default:
return -EINVAL;
}
}
EXPORT_SYMBOL_GPL(tps65218_reg_write);
/**
* tps65218_update_bits: Modify bits w.r.t mask, val and level.
*
* @tps: Device to write to.
* @reg: Register to read-write to.
* @mask: Mask.
* @val: Value to write.
* @level: Password protected level
*/
static int tps65218_update_bits(struct tps65218 *tps, unsigned int reg,
unsigned int mask, unsigned int val, unsigned int level)
{
int ret;
unsigned int data;
ret = regmap_read(tps->regmap, reg, &data);
if (ret) {
dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);
return ret;
}
data &= ~mask;
data |= val & mask;
mutex_lock(&tps->tps_lock);
ret = tps65218_reg_write(tps, reg, data, level);
if (ret)
dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);
mutex_unlock(&tps->tps_lock);
return ret;
}
int tps65218_set_bits(struct tps65218 *tps, unsigned int reg,
unsigned int mask, unsigned int val, unsigned int level)
{
return tps65218_update_bits(tps, reg, mask, val, level);
}
EXPORT_SYMBOL_GPL(tps65218_set_bits);
int tps65218_clear_bits(struct tps65218 *tps, unsigned int reg,
unsigned int mask, unsigned int level)
{
return tps65218_update_bits(tps, reg, mask, 0, level);
}
EXPORT_SYMBOL_GPL(tps65218_clear_bits);
static const struct regmap_range tps65218_yes_ranges[] = {
regmap_reg_range(TPS65218_REG_INT1, TPS65218_REG_INT2),
regmap_reg_range(TPS65218_REG_STATUS, TPS65218_REG_STATUS),
};
static const struct regmap_access_table tps65218_volatile_table = {
.yes_ranges = tps65218_yes_ranges,
.n_yes_ranges = ARRAY_SIZE(tps65218_yes_ranges),
};
static const struct regmap_config tps65218_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.cache_type = REGCACHE_MAPLE,
.volatile_table = &tps65218_volatile_table,
};
static const struct regmap_irq tps65218_irqs[] = {
/* INT1 IRQs */
[TPS65218_PRGC_IRQ] = {
.mask = TPS65218_INT1_PRGC,
},
[TPS65218_CC_AQC_IRQ] = {
.mask = TPS65218_INT1_CC_AQC,
},
[TPS65218_HOT_IRQ] = {
.mask = TPS65218_INT1_HOT,
},
[TPS65218_PB_IRQ] = {
.mask = TPS65218_INT1_PB,
},
[TPS65218_AC_IRQ] = {
.mask = TPS65218_INT1_AC,
},
[TPS65218_VPRG_IRQ] = {
.mask = TPS65218_INT1_VPRG,
},
[TPS65218_INVALID1_IRQ] = {
},
[TPS65218_INVALID2_IRQ] = {
},
/* INT2 IRQs*/
[TPS65218_LS1_I_IRQ] = {
.mask = TPS65218_INT2_LS1_I,
.reg_offset = 1,
},
[TPS65218_LS2_I_IRQ] = {
.mask = TPS65218_INT2_LS2_I,
.reg_offset = 1,
},
[TPS65218_LS3_I_IRQ] = {
.mask = TPS65218_INT2_LS3_I,
.reg_offset = 1,
},
[TPS65218_LS1_F_IRQ] = {
.mask = TPS65218_INT2_LS1_F,
.reg_offset = 1,
},
[TPS65218_LS2_F_IRQ] = {
.mask = TPS65218_INT2_LS2_F,
.reg_offset = 1,
},
[TPS65218_LS3_F_IRQ] = {
.mask = TPS65218_INT2_LS3_F,
.reg_offset = 1,
},
[TPS65218_INVALID3_IRQ] = {
},
[TPS65218_INVALID4_IRQ] = {
},
};
static const struct regmap_irq_chip tps65218_irq_chip = {
.name = "tps65218",
.irqs = tps65218_irqs,
.num_irqs = ARRAY_SIZE(tps65218_irqs),
.num_regs = 2,
.mask_base = TPS65218_REG_INT_MASK1,
.status_base = TPS65218_REG_INT1,
};
static const struct of_device_id of_tps65218_match_table[] = {
{ .compatible = "ti,tps65218", },
{}
};
MODULE_DEVICE_TABLE(of, of_tps65218_match_table);
static int tps65218_voltage_set_strict(struct tps65218 *tps)
{
u32 strict;
if (of_property_read_u32(tps->dev->of_node,
"ti,strict-supply-voltage-supervision",
&strict))
return 0;
if (strict != 0 && strict != 1) {
dev_err(tps->dev,
"Invalid ti,strict-supply-voltage-supervision value\n");
return -EINVAL;
}
tps65218_update_bits(tps, TPS65218_REG_CONFIG1,
TPS65218_CONFIG1_STRICT,
strict ? TPS65218_CONFIG1_STRICT : 0,
TPS65218_PROTECT_L1);
return 0;
}
static int tps65218_voltage_set_uv_hyst(struct tps65218 *tps)
{
u32 hyst;
if (of_property_read_u32(tps->dev->of_node,
"ti,under-voltage-hyst-microvolt", &hyst))
return 0;
if (hyst != 400000 && hyst != 200000) {
dev_err(tps->dev,
"Invalid ti,under-voltage-hyst-microvolt value\n");
return -EINVAL;
}
tps65218_update_bits(tps, TPS65218_REG_CONFIG2,
TPS65218_CONFIG2_UVLOHYS,
hyst == 400000 ? TPS65218_CONFIG2_UVLOHYS : 0,
TPS65218_PROTECT_L1);
return 0;
}
static int tps65218_voltage_set_uvlo(struct tps65218 *tps)
{
u32 uvlo;
int uvloval;
if (of_property_read_u32(tps->dev->of_node,
"ti,under-voltage-limit-microvolt", &uvlo))
return 0;
switch (uvlo) {
case 2750000:
uvloval = TPS65218_CONFIG1_UVLO_2750000;
break;
case 2950000:
uvloval = TPS65218_CONFIG1_UVLO_2950000;
break;
case 3250000:
uvloval = TPS65218_CONFIG1_UVLO_3250000;
break;
case 3350000:
uvloval = TPS65218_CONFIG1_UVLO_3350000;
break;
default:
dev_err(tps->dev,
"Invalid ti,under-voltage-limit-microvolt value\n");
return -EINVAL;
}
tps65218_update_bits(tps, TPS65218_REG_CONFIG1,
TPS65218_CONFIG1_UVLO_MASK, uvloval,
TPS65218_PROTECT_L1);
return 0;
}
static int tps65218_probe(struct i2c_client *client)
{
struct tps65218 *tps;
int ret;
unsigned int chipid;
tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
if (!tps)
return -ENOMEM;
i2c_set_clientdata(client, tps);
tps->dev = &client->dev;
tps->irq = client->irq;
tps->regmap = devm_regmap_init_i2c(client, &tps65218_regmap_config);
if (IS_ERR(tps->regmap)) {
ret = PTR_ERR(tps->regmap);
dev_err(tps->dev, "Failed to allocate register map: %d\n",
ret);
return ret;
}
mutex_init(&tps->tps_lock);
ret = devm_regmap_add_irq_chip(&client->dev, tps->regmap, tps->irq,
IRQF_ONESHOT, 0, &tps65218_irq_chip,
&tps->irq_data);
if (ret < 0)
return ret;
ret = regmap_read(tps->regmap, TPS65218_REG_CHIPID, &chipid);
if (ret) {
dev_err(tps->dev, "Failed to read chipid: %d\n", ret);
return ret;
}
tps->rev = chipid & TPS65218_CHIPID_REV_MASK;
ret = tps65218_voltage_set_strict(tps);
if (ret)
return ret;
ret = tps65218_voltage_set_uvlo(tps);
if (ret)
return ret;
ret = tps65218_voltage_set_uv_hyst(tps);
if (ret)
return ret;
ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65218_cells,
ARRAY_SIZE(tps65218_cells), NULL, 0,
regmap_irq_get_domain(tps->irq_data));
return ret;
}
static const struct i2c_device_id tps65218_id_table[] = {
{ "tps65218", TPS65218 },
{ },
};
MODULE_DEVICE_TABLE(i2c, tps65218_id_table);
static struct i2c_driver tps65218_driver = {
.driver = {
.name = "tps65218",
.of_match_table = of_tps65218_match_table,
},
.probe = tps65218_probe,
.id_table = tps65218_id_table,
};
module_i2c_driver(tps65218_driver);
MODULE_AUTHOR("J Keerthy <[email protected]>");
MODULE_DESCRIPTION("TPS65218 chip family multi-function driver");
MODULE_LICENSE("GPL v2");
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