426 строки
9.8 KiB
C
426 строки
9.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* tps65217.c
|
|
*
|
|
* TPS65217 chip family multi-function driver
|
|
*
|
|
* Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/err.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/irqdomain.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/mfd/tps65217.h>
|
|
|
|
static const struct resource charger_resources[] = {
|
|
DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_AC, "AC"),
|
|
DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_USB, "USB"),
|
|
};
|
|
|
|
static const struct resource pb_resources[] = {
|
|
DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_PB, "PB"),
|
|
};
|
|
|
|
static void tps65217_irq_lock(struct irq_data *data)
|
|
{
|
|
struct tps65217 *tps = irq_data_get_irq_chip_data(data);
|
|
|
|
mutex_lock(&tps->irq_lock);
|
|
}
|
|
|
|
static void tps65217_irq_sync_unlock(struct irq_data *data)
|
|
{
|
|
struct tps65217 *tps = irq_data_get_irq_chip_data(data);
|
|
int ret;
|
|
|
|
ret = tps65217_set_bits(tps, TPS65217_REG_INT, TPS65217_INT_MASK,
|
|
tps->irq_mask, TPS65217_PROTECT_NONE);
|
|
if (ret != 0)
|
|
dev_err(tps->dev, "Failed to sync IRQ masks\n");
|
|
|
|
mutex_unlock(&tps->irq_lock);
|
|
}
|
|
|
|
static void tps65217_irq_enable(struct irq_data *data)
|
|
{
|
|
struct tps65217 *tps = irq_data_get_irq_chip_data(data);
|
|
u8 mask = BIT(data->hwirq) << TPS65217_INT_SHIFT;
|
|
|
|
tps->irq_mask &= ~mask;
|
|
}
|
|
|
|
static void tps65217_irq_disable(struct irq_data *data)
|
|
{
|
|
struct tps65217 *tps = irq_data_get_irq_chip_data(data);
|
|
u8 mask = BIT(data->hwirq) << TPS65217_INT_SHIFT;
|
|
|
|
tps->irq_mask |= mask;
|
|
}
|
|
|
|
static struct irq_chip tps65217_irq_chip = {
|
|
.name = "tps65217",
|
|
.irq_bus_lock = tps65217_irq_lock,
|
|
.irq_bus_sync_unlock = tps65217_irq_sync_unlock,
|
|
.irq_enable = tps65217_irq_enable,
|
|
.irq_disable = tps65217_irq_disable,
|
|
};
|
|
|
|
static struct mfd_cell tps65217s[] = {
|
|
{
|
|
.name = "tps65217-pmic",
|
|
.of_compatible = "ti,tps65217-pmic",
|
|
},
|
|
{
|
|
.name = "tps65217-bl",
|
|
.of_compatible = "ti,tps65217-bl",
|
|
},
|
|
{
|
|
.name = "tps65217-charger",
|
|
.num_resources = ARRAY_SIZE(charger_resources),
|
|
.resources = charger_resources,
|
|
.of_compatible = "ti,tps65217-charger",
|
|
},
|
|
{
|
|
.name = "tps65217-pwrbutton",
|
|
.num_resources = ARRAY_SIZE(pb_resources),
|
|
.resources = pb_resources,
|
|
.of_compatible = "ti,tps65217-pwrbutton",
|
|
},
|
|
};
|
|
|
|
static irqreturn_t tps65217_irq_thread(int irq, void *data)
|
|
{
|
|
struct tps65217 *tps = data;
|
|
unsigned int status;
|
|
bool handled = false;
|
|
int i;
|
|
int ret;
|
|
|
|
ret = tps65217_reg_read(tps, TPS65217_REG_INT, &status);
|
|
if (ret < 0) {
|
|
dev_err(tps->dev, "Failed to read IRQ status: %d\n",
|
|
ret);
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
for (i = 0; i < TPS65217_NUM_IRQ; i++) {
|
|
if (status & BIT(i)) {
|
|
handle_nested_irq(irq_find_mapping(tps->irq_domain, i));
|
|
handled = true;
|
|
}
|
|
}
|
|
|
|
if (handled)
|
|
return IRQ_HANDLED;
|
|
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
static int tps65217_irq_map(struct irq_domain *h, unsigned int virq,
|
|
irq_hw_number_t hw)
|
|
{
|
|
struct tps65217 *tps = h->host_data;
|
|
|
|
irq_set_chip_data(virq, tps);
|
|
irq_set_chip_and_handler(virq, &tps65217_irq_chip, handle_edge_irq);
|
|
irq_set_nested_thread(virq, 1);
|
|
irq_set_parent(virq, tps->irq);
|
|
irq_set_noprobe(virq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct irq_domain_ops tps65217_irq_domain_ops = {
|
|
.map = tps65217_irq_map,
|
|
};
|
|
|
|
static int tps65217_irq_init(struct tps65217 *tps, int irq)
|
|
{
|
|
int ret;
|
|
|
|
mutex_init(&tps->irq_lock);
|
|
tps->irq = irq;
|
|
|
|
/* Mask all interrupt sources */
|
|
tps->irq_mask = TPS65217_INT_MASK;
|
|
tps65217_set_bits(tps, TPS65217_REG_INT, TPS65217_INT_MASK,
|
|
TPS65217_INT_MASK, TPS65217_PROTECT_NONE);
|
|
|
|
tps->irq_domain = irq_domain_add_linear(tps->dev->of_node,
|
|
TPS65217_NUM_IRQ, &tps65217_irq_domain_ops, tps);
|
|
if (!tps->irq_domain) {
|
|
dev_err(tps->dev, "Could not create IRQ domain\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ret = devm_request_threaded_irq(tps->dev, irq, NULL,
|
|
tps65217_irq_thread, IRQF_ONESHOT,
|
|
"tps65217-irq", tps);
|
|
if (ret) {
|
|
dev_err(tps->dev, "Failed to request IRQ %d: %d\n",
|
|
irq, ret);
|
|
return ret;
|
|
}
|
|
|
|
enable_irq_wake(irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* tps65217_reg_read: Read a single tps65217 register.
|
|
*
|
|
* @tps: Device to read from.
|
|
* @reg: Register to read.
|
|
* @val: Contians the value
|
|
*/
|
|
int tps65217_reg_read(struct tps65217 *tps, unsigned int reg,
|
|
unsigned int *val)
|
|
{
|
|
return regmap_read(tps->regmap, reg, val);
|
|
}
|
|
EXPORT_SYMBOL_GPL(tps65217_reg_read);
|
|
|
|
/**
|
|
* tps65217_reg_write: Write a single tps65217 register.
|
|
*
|
|
* @tps: Device to write to.
|
|
* @reg: Register to write to.
|
|
* @val: Value to write.
|
|
* @level: Password protected level
|
|
*/
|
|
int tps65217_reg_write(struct tps65217 *tps, unsigned int reg,
|
|
unsigned int val, unsigned int level)
|
|
{
|
|
int ret;
|
|
unsigned int xor_reg_val;
|
|
|
|
switch (level) {
|
|
case TPS65217_PROTECT_NONE:
|
|
return regmap_write(tps->regmap, reg, val);
|
|
case TPS65217_PROTECT_L1:
|
|
xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;
|
|
ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
|
|
xor_reg_val);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return regmap_write(tps->regmap, reg, val);
|
|
case TPS65217_PROTECT_L2:
|
|
xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;
|
|
ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
|
|
xor_reg_val);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = regmap_write(tps->regmap, reg, val);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
|
|
xor_reg_val);
|
|
if (ret < 0)
|
|
return ret;
|
|
return regmap_write(tps->regmap, reg, val);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(tps65217_reg_write);
|
|
|
|
/**
|
|
* tps65217_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 tps65217_update_bits(struct tps65217 *tps, unsigned int reg,
|
|
unsigned int mask, unsigned int val, unsigned int level)
|
|
{
|
|
int ret;
|
|
unsigned int data;
|
|
|
|
ret = tps65217_reg_read(tps, reg, &data);
|
|
if (ret) {
|
|
dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);
|
|
return ret;
|
|
}
|
|
|
|
data &= ~mask;
|
|
data |= val & mask;
|
|
|
|
ret = tps65217_reg_write(tps, reg, data, level);
|
|
if (ret)
|
|
dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int tps65217_set_bits(struct tps65217 *tps, unsigned int reg,
|
|
unsigned int mask, unsigned int val, unsigned int level)
|
|
{
|
|
return tps65217_update_bits(tps, reg, mask, val, level);
|
|
}
|
|
EXPORT_SYMBOL_GPL(tps65217_set_bits);
|
|
|
|
int tps65217_clear_bits(struct tps65217 *tps, unsigned int reg,
|
|
unsigned int mask, unsigned int level)
|
|
{
|
|
return tps65217_update_bits(tps, reg, mask, 0, level);
|
|
}
|
|
EXPORT_SYMBOL_GPL(tps65217_clear_bits);
|
|
|
|
static bool tps65217_volatile_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case TPS65217_REG_INT:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static const struct regmap_config tps65217_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
|
|
.max_register = TPS65217_REG_MAX,
|
|
.volatile_reg = tps65217_volatile_reg,
|
|
};
|
|
|
|
static const struct of_device_id tps65217_of_match[] = {
|
|
{ .compatible = "ti,tps65217"},
|
|
{ /* sentinel */ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, tps65217_of_match);
|
|
|
|
static int tps65217_probe(struct i2c_client *client)
|
|
{
|
|
struct tps65217 *tps;
|
|
unsigned int version;
|
|
bool status_off = false;
|
|
int ret;
|
|
|
|
status_off = of_property_read_bool(client->dev.of_node,
|
|
"ti,pmic-shutdown-controller");
|
|
|
|
tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
|
|
if (!tps)
|
|
return -ENOMEM;
|
|
|
|
i2c_set_clientdata(client, tps);
|
|
tps->dev = &client->dev;
|
|
|
|
tps->regmap = devm_regmap_init_i2c(client, &tps65217_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;
|
|
}
|
|
|
|
if (client->irq) {
|
|
tps65217_irq_init(tps, client->irq);
|
|
} else {
|
|
int i;
|
|
|
|
/* Don't tell children about IRQ resources which won't fire */
|
|
for (i = 0; i < ARRAY_SIZE(tps65217s); i++)
|
|
tps65217s[i].num_resources = 0;
|
|
}
|
|
|
|
ret = devm_mfd_add_devices(tps->dev, -1, tps65217s,
|
|
ARRAY_SIZE(tps65217s), NULL, 0,
|
|
tps->irq_domain);
|
|
if (ret < 0) {
|
|
dev_err(tps->dev, "mfd_add_devices failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = tps65217_reg_read(tps, TPS65217_REG_CHIPID, &version);
|
|
if (ret < 0) {
|
|
dev_err(tps->dev, "Failed to read revision register: %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Set the PMIC to shutdown on PWR_EN toggle */
|
|
if (status_off) {
|
|
ret = tps65217_set_bits(tps, TPS65217_REG_STATUS,
|
|
TPS65217_STATUS_OFF, TPS65217_STATUS_OFF,
|
|
TPS65217_PROTECT_NONE);
|
|
if (ret)
|
|
dev_warn(tps->dev, "unable to set the status OFF\n");
|
|
}
|
|
|
|
dev_info(tps->dev, "TPS65217 ID %#x version 1.%d\n",
|
|
(version & TPS65217_CHIPID_CHIP_MASK) >> 4,
|
|
version & TPS65217_CHIPID_REV_MASK);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tps65217_remove(struct i2c_client *client)
|
|
{
|
|
struct tps65217 *tps = i2c_get_clientdata(client);
|
|
unsigned int virq;
|
|
int i;
|
|
|
|
for (i = 0; i < TPS65217_NUM_IRQ; i++) {
|
|
virq = irq_find_mapping(tps->irq_domain, i);
|
|
if (virq)
|
|
irq_dispose_mapping(virq);
|
|
}
|
|
|
|
irq_domain_remove(tps->irq_domain);
|
|
tps->irq_domain = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id tps65217_id_table[] = {
|
|
{"tps65217", TPS65217},
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, tps65217_id_table);
|
|
|
|
static struct i2c_driver tps65217_driver = {
|
|
.driver = {
|
|
.name = "tps65217",
|
|
.of_match_table = tps65217_of_match,
|
|
},
|
|
.id_table = tps65217_id_table,
|
|
.probe_new = tps65217_probe,
|
|
.remove = tps65217_remove,
|
|
};
|
|
|
|
static int __init tps65217_init(void)
|
|
{
|
|
return i2c_add_driver(&tps65217_driver);
|
|
}
|
|
subsys_initcall(tps65217_init);
|
|
|
|
static void __exit tps65217_exit(void)
|
|
{
|
|
i2c_del_driver(&tps65217_driver);
|
|
}
|
|
module_exit(tps65217_exit);
|
|
|
|
MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
|
|
MODULE_DESCRIPTION("TPS65217 chip family multi-function driver");
|
|
MODULE_LICENSE("GPL v2");
|