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path: root/drivers/mfd/tps6586x.c
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Diffstat (limited to 'drivers/mfd/tps6586x.c')
-rw-r--r--drivers/mfd/tps6586x.c296
1 files changed, 87 insertions, 209 deletions
diff --git a/drivers/mfd/tps6586x.c b/drivers/mfd/tps6586x.c
index c84b5506d5fb..353c34812120 100644
--- a/drivers/mfd/tps6586x.c
+++ b/drivers/mfd/tps6586x.c
@@ -21,17 +21,14 @@
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
-#include <linux/gpio.h>
+#include <linux/err.h>
#include <linux/i2c.h>
+#include <linux/regmap.h>
#include <linux/regulator/of_regulator.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tps6586x.h>
-/* GPIO control registers */
-#define TPS6586X_GPIOSET1 0x5d
-#define TPS6586X_GPIOSET2 0x5e
-
/* interrupt control registers */
#define TPS6586X_INT_ACK1 0xb5
#define TPS6586X_INT_ACK2 0xb6
@@ -48,6 +45,9 @@
/* device id */
#define TPS6586X_VERSIONCRC 0xcd
+/* Maximum register */
+#define TPS6586X_MAX_REGISTER (TPS6586X_VERSIONCRC + 1)
+
struct tps6586x_irq_data {
u8 mask_reg;
u8 mask_mask;
@@ -89,226 +89,96 @@ static const struct tps6586x_irq_data tps6586x_irqs[] = {
[TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
};
+static struct mfd_cell tps6586x_cell[] = {
+ {
+ .name = "tps6586x-gpio",
+ },
+ {
+ .name = "tps6586x-rtc",
+ },
+ {
+ .name = "tps6586x-onkey",
+ },
+};
+
struct tps6586x {
- struct mutex lock;
struct device *dev;
struct i2c_client *client;
+ struct regmap *regmap;
- struct gpio_chip gpio;
struct irq_chip irq_chip;
struct mutex irq_lock;
int irq_base;
u32 irq_en;
- u8 mask_cache[5];
u8 mask_reg[5];
};
-static inline int __tps6586x_read(struct i2c_client *client,
- int reg, uint8_t *val)
-{
- int ret;
-
- ret = i2c_smbus_read_byte_data(client, reg);
- if (ret < 0) {
- dev_err(&client->dev, "failed reading at 0x%02x\n", reg);
- return ret;
- }
-
- *val = (uint8_t)ret;
-
- return 0;
-}
-
-static inline int __tps6586x_reads(struct i2c_client *client, int reg,
- int len, uint8_t *val)
-{
- int ret;
-
- ret = i2c_smbus_read_i2c_block_data(client, reg, len, val);
- if (ret < 0) {
- dev_err(&client->dev, "failed reading from 0x%02x\n", reg);
- return ret;
- }
-
- return 0;
-}
-
-static inline int __tps6586x_write(struct i2c_client *client,
- int reg, uint8_t val)
+static inline struct tps6586x *dev_to_tps6586x(struct device *dev)
{
- int ret;
-
- ret = i2c_smbus_write_byte_data(client, reg, val);
- if (ret < 0) {
- dev_err(&client->dev, "failed writing 0x%02x to 0x%02x\n",
- val, reg);
- return ret;
- }
-
- return 0;
-}
-
-static inline int __tps6586x_writes(struct i2c_client *client, int reg,
- int len, uint8_t *val)
-{
- int ret, i;
-
- for (i = 0; i < len; i++) {
- ret = __tps6586x_write(client, reg + i, *(val + i));
- if (ret < 0)
- return ret;
- }
-
- return 0;
+ return i2c_get_clientdata(to_i2c_client(dev));
}
int tps6586x_write(struct device *dev, int reg, uint8_t val)
{
- return __tps6586x_write(to_i2c_client(dev), reg, val);
+ struct tps6586x *tps6586x = dev_to_tps6586x(dev);
+
+ return regmap_write(tps6586x->regmap, reg, val);
}
EXPORT_SYMBOL_GPL(tps6586x_write);
int tps6586x_writes(struct device *dev, int reg, int len, uint8_t *val)
{
- return __tps6586x_writes(to_i2c_client(dev), reg, len, val);
+ struct tps6586x *tps6586x = dev_to_tps6586x(dev);
+
+ return regmap_bulk_write(tps6586x->regmap, reg, val, len);
}
EXPORT_SYMBOL_GPL(tps6586x_writes);
int tps6586x_read(struct device *dev, int reg, uint8_t *val)
{
- return __tps6586x_read(to_i2c_client(dev), reg, val);
+ struct tps6586x *tps6586x = dev_to_tps6586x(dev);
+ unsigned int rval;
+ int ret;
+
+ ret = regmap_read(tps6586x->regmap, reg, &rval);
+ if (!ret)
+ *val = rval;
+ return ret;
}
EXPORT_SYMBOL_GPL(tps6586x_read);
int tps6586x_reads(struct device *dev, int reg, int len, uint8_t *val)
{
- return __tps6586x_reads(to_i2c_client(dev), reg, len, val);
+ struct tps6586x *tps6586x = dev_to_tps6586x(dev);
+
+ return regmap_bulk_read(tps6586x->regmap, reg, val, len);
}
EXPORT_SYMBOL_GPL(tps6586x_reads);
int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
{
- struct tps6586x *tps6586x = dev_get_drvdata(dev);
- uint8_t reg_val;
- int ret = 0;
-
- mutex_lock(&tps6586x->lock);
+ struct tps6586x *tps6586x = dev_to_tps6586x(dev);
- ret = __tps6586x_read(to_i2c_client(dev), reg, &reg_val);
- if (ret)
- goto out;
-
- if ((reg_val & bit_mask) != bit_mask) {
- reg_val |= bit_mask;
- ret = __tps6586x_write(to_i2c_client(dev), reg, reg_val);
- }
-out:
- mutex_unlock(&tps6586x->lock);
- return ret;
+ return regmap_update_bits(tps6586x->regmap, reg, bit_mask, bit_mask);
}
EXPORT_SYMBOL_GPL(tps6586x_set_bits);
int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
{
- struct tps6586x *tps6586x = dev_get_drvdata(dev);
- uint8_t reg_val;
- int ret = 0;
-
- mutex_lock(&tps6586x->lock);
+ struct tps6586x *tps6586x = dev_to_tps6586x(dev);
- ret = __tps6586x_read(to_i2c_client(dev), reg, &reg_val);
- if (ret)
- goto out;
-
- if (reg_val & bit_mask) {
- reg_val &= ~bit_mask;
- ret = __tps6586x_write(to_i2c_client(dev), reg, reg_val);
- }
-out:
- mutex_unlock(&tps6586x->lock);
- return ret;
+ return regmap_update_bits(tps6586x->regmap, reg, bit_mask, 0);
}
EXPORT_SYMBOL_GPL(tps6586x_clr_bits);
int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
{
- struct tps6586x *tps6586x = dev_get_drvdata(dev);
- uint8_t reg_val;
- int ret = 0;
-
- mutex_lock(&tps6586x->lock);
+ struct tps6586x *tps6586x = dev_to_tps6586x(dev);
- ret = __tps6586x_read(tps6586x->client, reg, &reg_val);
- if (ret)
- goto out;
-
- if ((reg_val & mask) != val) {
- reg_val = (reg_val & ~mask) | val;
- ret = __tps6586x_write(tps6586x->client, reg, reg_val);
- }
-out:
- mutex_unlock(&tps6586x->lock);
- return ret;
+ return regmap_update_bits(tps6586x->regmap, reg, mask, val);
}
EXPORT_SYMBOL_GPL(tps6586x_update);
-static int tps6586x_gpio_get(struct gpio_chip *gc, unsigned offset)
-{
- struct tps6586x *tps6586x = container_of(gc, struct tps6586x, gpio);
- uint8_t val;
- int ret;
-
- ret = __tps6586x_read(tps6586x->client, TPS6586X_GPIOSET2, &val);
- if (ret)
- return ret;
-
- return !!(val & (1 << offset));
-}
-
-
-static void tps6586x_gpio_set(struct gpio_chip *chip, unsigned offset,
- int value)
-{
- struct tps6586x *tps6586x = container_of(chip, struct tps6586x, gpio);
-
- tps6586x_update(tps6586x->dev, TPS6586X_GPIOSET2,
- value << offset, 1 << offset);
-}
-
-static int tps6586x_gpio_output(struct gpio_chip *gc, unsigned offset,
- int value)
-{
- struct tps6586x *tps6586x = container_of(gc, struct tps6586x, gpio);
- uint8_t val, mask;
-
- tps6586x_gpio_set(gc, offset, value);
-
- val = 0x1 << (offset * 2);
- mask = 0x3 << (offset * 2);
-
- return tps6586x_update(tps6586x->dev, TPS6586X_GPIOSET1, val, mask);
-}
-
-static int tps6586x_gpio_init(struct tps6586x *tps6586x, int gpio_base)
-{
- if (!gpio_base)
- return 0;
-
- tps6586x->gpio.owner = THIS_MODULE;
- tps6586x->gpio.label = tps6586x->client->name;
- tps6586x->gpio.dev = tps6586x->dev;
- tps6586x->gpio.base = gpio_base;
- tps6586x->gpio.ngpio = 4;
- tps6586x->gpio.can_sleep = 1;
-
- /* FIXME: add handling of GPIOs as dedicated inputs */
- tps6586x->gpio.direction_output = tps6586x_gpio_output;
- tps6586x->gpio.set = tps6586x_gpio_set;
- tps6586x->gpio.get = tps6586x_gpio_get;
-
- return gpiochip_add(&tps6586x->gpio);
-}
-
static int __remove_subdev(struct device *dev, void *unused)
{
platform_device_unregister(to_platform_device(dev));
@@ -354,12 +224,11 @@ static void tps6586x_irq_sync_unlock(struct irq_data *data)
int i;
for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
- if (tps6586x->mask_reg[i] != tps6586x->mask_cache[i]) {
- if (!WARN_ON(tps6586x_write(tps6586x->dev,
- TPS6586X_INT_MASK1 + i,
- tps6586x->mask_reg[i])))
- tps6586x->mask_cache[i] = tps6586x->mask_reg[i];
- }
+ int ret;
+ ret = tps6586x_write(tps6586x->dev,
+ TPS6586X_INT_MASK1 + i,
+ tps6586x->mask_reg[i]);
+ WARN_ON(ret);
}
mutex_unlock(&tps6586x->irq_lock);
@@ -406,7 +275,6 @@ static int __devinit tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
mutex_init(&tps6586x->irq_lock);
for (i = 0; i < 5; i++) {
- tps6586x->mask_cache[i] = 0xff;
tps6586x->mask_reg[i] = 0xff;
tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
}
@@ -556,6 +424,23 @@ static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *clien
}
#endif
+static bool is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ /* Cache all interrupt mask register */
+ if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5))
+ return false;
+
+ return true;
+}
+
+static const struct regmap_config tps6586x_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = TPS6586X_MAX_REGISTER - 1,
+ .volatile_reg = is_volatile_reg,
+ .cache_type = REGCACHE_RBTREE,
+};
+
static int __devinit tps6586x_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -579,29 +464,39 @@ static int __devinit tps6586x_i2c_probe(struct i2c_client *client,
dev_info(&client->dev, "VERSIONCRC is %02x\n", ret);
- tps6586x = kzalloc(sizeof(struct tps6586x), GFP_KERNEL);
- if (tps6586x == NULL)
+ tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
+ if (tps6586x == NULL) {
+ dev_err(&client->dev, "memory for tps6586x alloc failed\n");
return -ENOMEM;
+ }
tps6586x->client = client;
tps6586x->dev = &client->dev;
i2c_set_clientdata(client, tps6586x);
- mutex_init(&tps6586x->lock);
+ tps6586x->regmap = devm_regmap_init_i2c(client,
+ &tps6586x_regmap_config);
+ if (IS_ERR(tps6586x->regmap)) {
+ ret = PTR_ERR(tps6586x->regmap);
+ dev_err(&client->dev, "regmap init failed: %d\n", ret);
+ return ret;
+ }
+
if (client->irq) {
ret = tps6586x_irq_init(tps6586x, client->irq,
pdata->irq_base);
if (ret) {
dev_err(&client->dev, "IRQ init failed: %d\n", ret);
- goto err_irq_init;
+ return ret;
}
}
- ret = tps6586x_gpio_init(tps6586x, pdata->gpio_base);
- if (ret) {
- dev_err(&client->dev, "GPIO registration failed: %d\n", ret);
- goto err_gpio_init;
+ ret = mfd_add_devices(tps6586x->dev, -1,
+ tps6586x_cell, ARRAY_SIZE(tps6586x_cell), NULL, 0);
+ if (ret < 0) {
+ dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
+ goto err_mfd_add;
}
ret = tps6586x_add_subdevs(tps6586x, pdata);
@@ -613,38 +508,21 @@ static int __devinit tps6586x_i2c_probe(struct i2c_client *client,
return 0;
err_add_devs:
- if (pdata->gpio_base) {
- ret = gpiochip_remove(&tps6586x->gpio);
- if (ret)
- dev_err(&client->dev, "Can't remove gpio chip: %d\n",
- ret);
- }
-err_gpio_init:
+ mfd_remove_devices(tps6586x->dev);
+err_mfd_add:
if (client->irq)
free_irq(client->irq, tps6586x);
-err_irq_init:
- kfree(tps6586x);
return ret;
}
static int __devexit tps6586x_i2c_remove(struct i2c_client *client)
{
struct tps6586x *tps6586x = i2c_get_clientdata(client);
- struct tps6586x_platform_data *pdata = client->dev.platform_data;
- int ret;
+ tps6586x_remove_subdevs(tps6586x);
+ mfd_remove_devices(tps6586x->dev);
if (client->irq)
free_irq(client->irq, tps6586x);
-
- if (pdata->gpio_base) {
- ret = gpiochip_remove(&tps6586x->gpio);
- if (ret)
- dev_err(&client->dev, "Can't remove gpio chip: %d\n",
- ret);
- }
-
- tps6586x_remove_subdevs(tps6586x);
- kfree(tps6586x);
return 0;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.