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Diffstat (limited to 'drivers/mfd/tps6586x.c')
-rw-r--r--drivers/mfd/tps6586x.c198
1 files changed, 144 insertions, 54 deletions
diff --git a/drivers/mfd/tps6586x.c b/drivers/mfd/tps6586x.c
index 4b93ed4d5cd6..8d5fe2b60bfa 100644
--- a/drivers/mfd/tps6586x.c
+++ b/drivers/mfd/tps6586x.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Core driver for TI TPS6586x PMIC family
*
@@ -9,10 +10,6 @@
* Mike Rapoport <mike@compulab.co.il>
* Copyright (C) 2006-2008 Marvell International Ltd.
* Eric Miao <eric.miao@marvell.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/interrupt.h>
@@ -25,12 +22,15 @@
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
+#include <linux/reboot.h>
#include <linux/regmap.h>
+#include <linux/of.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tps6586x.h>
#define TPS6586X_SUPPLYENE 0x14
+#define SOFT_RST_BIT BIT(0)
#define EXITSLREQ_BIT BIT(1)
#define SLEEP_MODE_BIT BIT(3)
@@ -51,7 +51,7 @@
#define TPS6586X_VERSIONCRC 0xcd
/* Maximum register */
-#define TPS6586X_MAX_REGISTER (TPS6586X_VERSIONCRC + 1)
+#define TPS6586X_MAX_REGISTER TPS6586X_VERSIONCRC
struct tps6586x_irq_data {
u8 mask_reg;
@@ -94,7 +94,7 @@ static const struct tps6586x_irq_data tps6586x_irqs[] = {
[TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
};
-static struct resource tps6586x_rtc_resources[] = {
+static const struct resource tps6586x_rtc_resources[] = {
{
.start = TPS6586X_INT_RTC_ALM1,
.end = TPS6586X_INT_RTC_ALM1,
@@ -102,7 +102,7 @@ static struct resource tps6586x_rtc_resources[] = {
},
};
-static struct mfd_cell tps6586x_cell[] = {
+static const struct mfd_cell tps6586x_cell[] = {
{
.name = "tps6586x-gpio",
},
@@ -123,7 +123,9 @@ struct tps6586x {
struct device *dev;
struct i2c_client *client;
struct regmap *regmap;
+ int version;
+ int irq;
struct irq_chip irq_chip;
struct mutex irq_lock;
int irq_base;
@@ -206,6 +208,14 @@ int tps6586x_irq_get_virq(struct device *dev, int irq)
}
EXPORT_SYMBOL_GPL(tps6586x_irq_get_virq);
+int tps6586x_get_version(struct device *dev)
+{
+ struct tps6586x *tps6586x = dev_get_drvdata(dev);
+
+ return tps6586x->version;
+}
+EXPORT_SYMBOL_GPL(tps6586x_get_version);
+
static int __remove_subdev(struct device *dev, void *unused)
{
platform_device_unregister(to_platform_device(dev));
@@ -261,12 +271,19 @@ static void tps6586x_irq_sync_unlock(struct irq_data *data)
mutex_unlock(&tps6586x->irq_lock);
}
+static int tps6586x_irq_set_wake(struct irq_data *irq_data, unsigned int on)
+{
+ struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
+ return irq_set_irq_wake(tps6586x->irq, on);
+}
+
static struct irq_chip tps6586x_irq_chip = {
.name = "tps6586x",
.irq_bus_lock = tps6586x_irq_lock,
.irq_bus_sync_unlock = tps6586x_irq_sync_unlock,
.irq_disable = tps6586x_irq_disable,
.irq_enable = tps6586x_irq_enable,
+ .irq_set_wake = pm_sleep_ptr(tps6586x_irq_set_wake),
};
static int tps6586x_irq_map(struct irq_domain *h, unsigned int virq,
@@ -277,19 +294,12 @@ static int tps6586x_irq_map(struct irq_domain *h, unsigned int virq,
irq_set_chip_data(virq, tps6586x);
irq_set_chip_and_handler(virq, &tps6586x_irq_chip, handle_simple_irq);
irq_set_nested_thread(virq, 1);
-
- /* ARM needs us to explicitly flag the IRQ as valid
- * and will set them noprobe when we do so. */
-#ifdef CONFIG_ARM
- set_irq_flags(virq, IRQF_VALID);
-#else
irq_set_noprobe(virq);
-#endif
return 0;
}
-static struct irq_domain_ops tps6586x_domain_ops = {
+static const struct irq_domain_ops tps6586x_domain_ops = {
.map = tps6586x_irq_map,
.xlate = irq_domain_xlate_twocell,
};
@@ -297,18 +307,19 @@ static struct irq_domain_ops tps6586x_domain_ops = {
static irqreturn_t tps6586x_irq(int irq, void *data)
{
struct tps6586x *tps6586x = data;
- u32 acks;
+ uint32_t acks;
+ __le32 val;
int ret = 0;
ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
- sizeof(acks), (uint8_t *)&acks);
+ sizeof(acks), (uint8_t *)&val);
if (ret < 0) {
dev_err(tps6586x->dev, "failed to read interrupt status\n");
return IRQ_NONE;
}
- acks = le32_to_cpu(acks);
+ acks = le32_to_cpu(val);
while (acks) {
int i = __ffs(acks);
@@ -331,6 +342,8 @@ static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
int new_irq_base;
int irq_num = ARRAY_SIZE(tps6586x_irqs);
+ tps6586x->irq = irq;
+
mutex_init(&tps6586x->irq_lock);
for (i = 0; i < 5; i++) {
tps6586x->mask_reg[i] = 0xff;
@@ -350,9 +363,9 @@ static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
new_irq_base = 0;
}
- tps6586x->irq_domain = irq_domain_add_simple(tps6586x->dev->of_node,
- irq_num, new_irq_base, &tps6586x_domain_ops,
- tps6586x);
+ tps6586x->irq_domain = irq_domain_create_simple(dev_fwnode(tps6586x->dev), irq_num,
+ new_irq_base, &tps6586x_domain_ops,
+ tps6586x);
if (!tps6586x->irq_domain) {
dev_err(tps6586x->dev, "Failed to create IRQ domain\n");
return -ENOMEM;
@@ -360,10 +373,8 @@ static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
"tps6586x", tps6586x);
- if (!ret) {
+ if (!ret)
device_init_wakeup(tps6586x->dev, 1);
- enable_irq_wake(irq);
- }
return ret;
}
@@ -408,10 +419,8 @@ static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *clien
struct tps6586x_platform_data *pdata;
pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
- if (!pdata) {
- dev_err(&client->dev, "Memory allocation failed\n");
+ if (!pdata)
return NULL;
- }
pdata->num_subdevs = 0;
pdata->subdevs = NULL;
@@ -422,7 +431,7 @@ static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *clien
return pdata;
}
-static struct of_device_id tps6586x_of_match[] = {
+static const struct of_device_id tps6586x_of_match[] = {
{ .compatible = "ti,tps6586x", },
{ },
};
@@ -445,26 +454,76 @@ static bool is_volatile_reg(struct device *dev, unsigned int reg)
static const struct regmap_config tps6586x_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
- .max_register = TPS6586X_MAX_REGISTER - 1,
+ .max_register = TPS6586X_MAX_REGISTER,
.volatile_reg = is_volatile_reg,
- .cache_type = REGCACHE_RBTREE,
+ .cache_type = REGCACHE_MAPLE,
};
-static struct device *tps6586x_dev;
-static void tps6586x_power_off(void)
+static int tps6586x_power_off_handler(struct sys_off_data *data)
{
- if (tps6586x_clr_bits(tps6586x_dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT))
- return;
+ int ret;
- tps6586x_set_bits(tps6586x_dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT);
+ /* Put the PMIC into sleep state. This takes at least 20ms. */
+ ret = tps6586x_clr_bits(data->dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT);
+ if (ret)
+ return notifier_from_errno(ret);
+
+ ret = tps6586x_set_bits(data->dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT);
+ if (ret)
+ return notifier_from_errno(ret);
+
+ mdelay(50);
+ return notifier_from_errno(-ETIME);
}
-static int tps6586x_i2c_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
+static int tps6586x_restart_handler(struct sys_off_data *data)
{
- struct tps6586x_platform_data *pdata = client->dev.platform_data;
+ int ret;
+
+ /* Put the PMIC into hard reboot state. This takes at least 20ms. */
+ ret = tps6586x_set_bits(data->dev, TPS6586X_SUPPLYENE, SOFT_RST_BIT);
+ if (ret)
+ return notifier_from_errno(ret);
+
+ mdelay(50);
+ return notifier_from_errno(-ETIME);
+}
+
+static void tps6586x_print_version(struct i2c_client *client, int version)
+{
+ const char *name;
+
+ switch (version) {
+ case TPS658621A:
+ name = "TPS658621A";
+ break;
+ case TPS658621CD:
+ name = "TPS658621C/D";
+ break;
+ case TPS658623:
+ name = "TPS658623";
+ break;
+ case TPS658640:
+ case TPS658640v2:
+ name = "TPS658640";
+ break;
+ case TPS658643:
+ name = "TPS658643";
+ break;
+ default:
+ name = "TPS6586X";
+ break;
+ }
+
+ dev_info(&client->dev, "Found %s, VERSIONCRC is %02x\n", name, version);
+}
+
+static int tps6586x_i2c_probe(struct i2c_client *client)
+{
+ struct tps6586x_platform_data *pdata = dev_get_platdata(&client->dev);
struct tps6586x *tps6586x;
int ret;
+ int version;
if (!pdata && client->dev.of_node)
pdata = tps6586x_parse_dt(client);
@@ -474,19 +533,18 @@ static int tps6586x_i2c_probe(struct i2c_client *client,
return -ENOTSUPP;
}
- ret = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
- if (ret < 0) {
- dev_err(&client->dev, "Chip ID read failed: %d\n", ret);
+ version = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
+ if (version < 0) {
+ dev_err(&client->dev, "Chip ID read failed: %d\n", version);
return -EIO;
}
- dev_info(&client->dev, "VERSIONCRC is %02x\n", ret);
-
tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
- if (tps6586x == NULL) {
- dev_err(&client->dev, "memory for tps6586x alloc failed\n");
+ if (!tps6586x)
return -ENOMEM;
- }
+
+ tps6586x->version = version;
+ tps6586x_print_version(client, tps6586x->version);
tps6586x->client = client;
tps6586x->dev = &client->dev;
@@ -524,9 +582,20 @@ static int tps6586x_i2c_probe(struct i2c_client *client,
goto err_add_devs;
}
- if (pdata->pm_off && !pm_power_off) {
- tps6586x_dev = &client->dev;
- pm_power_off = tps6586x_power_off;
+ if (pdata->pm_off) {
+ ret = devm_register_power_off_handler(&client->dev, &tps6586x_power_off_handler,
+ NULL);
+ if (ret) {
+ dev_err(&client->dev, "register power off handler failed: %d\n", ret);
+ goto err_add_devs;
+ }
+
+ ret = devm_register_restart_handler(&client->dev, &tps6586x_restart_handler,
+ NULL);
+ if (ret) {
+ dev_err(&client->dev, "register restart handler failed: %d\n", ret);
+ goto err_add_devs;
+ }
}
return 0;
@@ -539,7 +608,7 @@ err_mfd_add:
return ret;
}
-static int tps6586x_i2c_remove(struct i2c_client *client)
+static void tps6586x_i2c_remove(struct i2c_client *client)
{
struct tps6586x *tps6586x = i2c_get_clientdata(client);
@@ -547,20 +616,42 @@ static int tps6586x_i2c_remove(struct i2c_client *client)
mfd_remove_devices(tps6586x->dev);
if (client->irq)
free_irq(client->irq, tps6586x);
+}
+
+static int __maybe_unused tps6586x_i2c_suspend(struct device *dev)
+{
+ struct tps6586x *tps6586x = dev_get_drvdata(dev);
+
+ if (tps6586x->client->irq)
+ disable_irq(tps6586x->client->irq);
+
return 0;
}
+static int __maybe_unused tps6586x_i2c_resume(struct device *dev)
+{
+ struct tps6586x *tps6586x = dev_get_drvdata(dev);
+
+ if (tps6586x->client->irq)
+ enable_irq(tps6586x->client->irq);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(tps6586x_pm_ops, tps6586x_i2c_suspend,
+ tps6586x_i2c_resume);
+
static const struct i2c_device_id tps6586x_id_table[] = {
- { "tps6586x", 0 },
- { },
+ { "tps6586x" },
+ { }
};
MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);
static struct i2c_driver tps6586x_driver = {
.driver = {
.name = "tps6586x",
- .owner = THIS_MODULE,
.of_match_table = of_match_ptr(tps6586x_of_match),
+ .pm = &tps6586x_pm_ops,
},
.probe = tps6586x_i2c_probe,
.remove = tps6586x_i2c_remove,
@@ -581,4 +672,3 @@ module_exit(tps6586x_exit);
MODULE_DESCRIPTION("TPS6586X core driver");
MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
-MODULE_LICENSE("GPL");
generated by cgit (git 2.34.1) at 2025-12-25 13:21:52 +0000