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path: root/drivers/mfd/88pm860x-i2c.c
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Diffstat (limited to 'drivers/mfd/88pm860x-i2c.c')
-rw-r--r--drivers/mfd/88pm860x-i2c.c299
1 files changed, 152 insertions, 147 deletions
diff --git a/drivers/mfd/88pm860x-i2c.c b/drivers/mfd/88pm860x-i2c.c
index bc02e6b2160..ff8f803ce83 100644
--- a/drivers/mfd/88pm860x-i2c.c
+++ b/drivers/mfd/88pm860x-i2c.c
@@ -10,53 +10,19 @@
*/
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/platform_device.h>
#include <linux/i2c.h>
+#include <linux/regmap.h>
#include <linux/mfd/88pm860x.h>
-#include <linux/slab.h>
-
-static inline int pm860x_read_device(struct i2c_client *i2c,
- int reg, int bytes, void *dest)
-{
- unsigned char data;
- int ret;
-
- data = (unsigned char)reg;
- ret = i2c_master_send(i2c, &data, 1);
- if (ret < 0)
- return ret;
-
- ret = i2c_master_recv(i2c, dest, bytes);
- if (ret < 0)
- return ret;
- return 0;
-}
-
-static inline int pm860x_write_device(struct i2c_client *i2c,
- int reg, int bytes, void *src)
-{
- unsigned char buf[bytes + 1];
- int ret;
-
- buf[0] = (unsigned char)reg;
- memcpy(&buf[1], src, bytes);
-
- ret = i2c_master_send(i2c, buf, bytes + 1);
- if (ret < 0)
- return ret;
- return 0;
-}
int pm860x_reg_read(struct i2c_client *i2c, int reg)
{
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
- unsigned char data;
+ struct regmap *map = (i2c == chip->client) ? chip->regmap
+ : chip->regmap_companion;
+ unsigned int data;
int ret;
- mutex_lock(&chip->io_lock);
- ret = pm860x_read_device(i2c, reg, 1, &data);
- mutex_unlock(&chip->io_lock);
-
+ ret = regmap_read(map, reg, &data);
if (ret < 0)
return ret;
else
@@ -68,12 +34,11 @@ int pm860x_reg_write(struct i2c_client *i2c, int reg,
unsigned char data)
{
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
+ struct regmap *map = (i2c == chip->client) ? chip->regmap
+ : chip->regmap_companion;
int ret;
- mutex_lock(&chip->io_lock);
- ret = pm860x_write_device(i2c, reg, 1, &data);
- mutex_unlock(&chip->io_lock);
-
+ ret = regmap_write(map, reg, data);
return ret;
}
EXPORT_SYMBOL(pm860x_reg_write);
@@ -82,12 +47,11 @@ int pm860x_bulk_read(struct i2c_client *i2c, int reg,
int count, unsigned char *buf)
{
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
+ struct regmap *map = (i2c == chip->client) ? chip->regmap
+ : chip->regmap_companion;
int ret;
- mutex_lock(&chip->io_lock);
- ret = pm860x_read_device(i2c, reg, count, buf);
- mutex_unlock(&chip->io_lock);
-
+ ret = regmap_raw_read(map, reg, buf, count);
return ret;
}
EXPORT_SYMBOL(pm860x_bulk_read);
@@ -96,12 +60,11 @@ int pm860x_bulk_write(struct i2c_client *i2c, int reg,
int count, unsigned char *buf)
{
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
+ struct regmap *map = (i2c == chip->client) ? chip->regmap
+ : chip->regmap_companion;
int ret;
- mutex_lock(&chip->io_lock);
- ret = pm860x_write_device(i2c, reg, count, buf);
- mutex_unlock(&chip->io_lock);
-
+ ret = regmap_raw_write(map, reg, buf, count);
return ret;
}
EXPORT_SYMBOL(pm860x_bulk_write);
@@ -110,126 +73,168 @@ int pm860x_set_bits(struct i2c_client *i2c, int reg,
unsigned char mask, unsigned char data)
{
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
- unsigned char value;
+ struct regmap *map = (i2c == chip->client) ? chip->regmap
+ : chip->regmap_companion;
int ret;
- mutex_lock(&chip->io_lock);
- ret = pm860x_read_device(i2c, reg, 1, &value);
- if (ret < 0)
- goto out;
- value &= ~mask;
- value |= data;
- ret = pm860x_write_device(i2c, reg, 1, &value);
-out:
- mutex_unlock(&chip->io_lock);
+ ret = regmap_update_bits(map, reg, mask, data);
return ret;
}
EXPORT_SYMBOL(pm860x_set_bits);
-
-static const struct i2c_device_id pm860x_id_table[] = {
- { "88PM860x", 0 },
- {}
-};
-MODULE_DEVICE_TABLE(i2c, pm860x_id_table);
-
-static int verify_addr(struct i2c_client *i2c)
+static int read_device(struct i2c_client *i2c, int reg,
+ int bytes, void *dest)
{
- unsigned short addr_8607[] = {0x30, 0x34};
- unsigned short addr_8606[] = {0x10, 0x11};
- int size, i;
-
- if (i2c == NULL)
- return 0;
- size = ARRAY_SIZE(addr_8606);
- for (i = 0; i < size; i++) {
- if (i2c->addr == *(addr_8606 + i))
- return CHIP_PM8606;
- }
- size = ARRAY_SIZE(addr_8607);
- for (i = 0; i < size; i++) {
- if (i2c->addr == *(addr_8607 + i))
- return CHIP_PM8607;
- }
+ unsigned char msgbuf0[I2C_SMBUS_BLOCK_MAX + 3];
+ unsigned char msgbuf1[I2C_SMBUS_BLOCK_MAX + 2];
+ struct i2c_adapter *adap = i2c->adapter;
+ struct i2c_msg msg[2] = {
+ {
+ .addr = i2c->addr,
+ .flags = 0,
+ .len = 1,
+ .buf = msgbuf0
+ },
+ { .addr = i2c->addr,
+ .flags = I2C_M_RD,
+ .len = 0,
+ .buf = msgbuf1
+ },
+ };
+ int num = 1, ret = 0;
+
+ if (dest == NULL)
+ return -EINVAL;
+ msgbuf0[0] = (unsigned char)reg; /* command */
+ msg[1].len = bytes;
+
+ /* if data needs to read back, num should be 2 */
+ if (bytes > 0)
+ num = 2;
+ ret = adap->algo->master_xfer(adap, msg, num);
+ memcpy(dest, msgbuf1, bytes);
+ if (ret < 0)
+ return ret;
return 0;
}
-static int __devinit pm860x_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
+static int write_device(struct i2c_client *i2c, int reg,
+ int bytes, void *src)
{
- struct pm860x_platform_data *pdata = client->dev.platform_data;
- struct pm860x_chip *chip;
+ unsigned char buf[bytes + 1];
+ struct i2c_adapter *adap = i2c->adapter;
+ struct i2c_msg msg;
+ int ret;
- if (!pdata) {
- pr_info("No platform data in %s!\n", __func__);
- return -EINVAL;
- }
-
- chip = kzalloc(sizeof(struct pm860x_chip), GFP_KERNEL);
- if (chip == NULL)
- return -ENOMEM;
-
- chip->id = verify_addr(client);
- chip->client = client;
- i2c_set_clientdata(client, chip);
- chip->dev = &client->dev;
- mutex_init(&chip->io_lock);
- dev_set_drvdata(chip->dev, chip);
-
- /*
- * Both client and companion client shares same platform driver.
- * Driver distinguishes them by pdata->companion_addr.
- * pdata->companion_addr is only assigned if companion chip exists.
- * At the same time, the companion_addr shouldn't equal to client
- * address.
- */
- if (pdata->companion_addr && (pdata->companion_addr != client->addr)) {
- chip->companion_addr = pdata->companion_addr;
- chip->companion = i2c_new_dummy(chip->client->adapter,
- chip->companion_addr);
- i2c_set_clientdata(chip->companion, chip);
- }
-
- pm860x_device_init(chip, pdata);
+ buf[0] = (unsigned char)reg;
+ memcpy(&buf[1], src, bytes);
+ msg.addr = i2c->addr;
+ msg.flags = 0;
+ msg.len = bytes + 1;
+ msg.buf = buf;
+
+ ret = adap->algo->master_xfer(adap, &msg, 1);
+ if (ret < 0)
+ return ret;
return 0;
}
-static int __devexit pm860x_remove(struct i2c_client *client)
+int pm860x_page_reg_read(struct i2c_client *i2c, int reg)
{
- struct pm860x_chip *chip = i2c_get_clientdata(client);
+ unsigned char zero = 0;
+ unsigned char data;
+ int ret;
- pm860x_device_exit(chip);
- i2c_unregister_device(chip->companion);
- kfree(chip);
- return 0;
+ i2c_lock_adapter(i2c->adapter);
+ read_device(i2c, 0xFA, 0, &zero);
+ read_device(i2c, 0xFB, 0, &zero);
+ read_device(i2c, 0xFF, 0, &zero);
+ ret = read_device(i2c, reg, 1, &data);
+ if (ret >= 0)
+ ret = (int)data;
+ read_device(i2c, 0xFE, 0, &zero);
+ read_device(i2c, 0xFC, 0, &zero);
+ i2c_unlock_adapter(i2c->adapter);
+ return ret;
+}
+EXPORT_SYMBOL(pm860x_page_reg_read);
+
+int pm860x_page_reg_write(struct i2c_client *i2c, int reg,
+ unsigned char data)
+{
+ unsigned char zero;
+ int ret;
+
+ i2c_lock_adapter(i2c->adapter);
+ read_device(i2c, 0xFA, 0, &zero);
+ read_device(i2c, 0xFB, 0, &zero);
+ read_device(i2c, 0xFF, 0, &zero);
+ ret = write_device(i2c, reg, 1, &data);
+ read_device(i2c, 0xFE, 0, &zero);
+ read_device(i2c, 0xFC, 0, &zero);
+ i2c_unlock_adapter(i2c->adapter);
+ return ret;
}
+EXPORT_SYMBOL(pm860x_page_reg_write);
-static struct i2c_driver pm860x_driver = {
- .driver = {
- .name = "88PM860x",
- .owner = THIS_MODULE,
- },
- .probe = pm860x_probe,
- .remove = __devexit_p(pm860x_remove),
- .id_table = pm860x_id_table,
-};
-
-static int __init pm860x_i2c_init(void)
+int pm860x_page_bulk_read(struct i2c_client *i2c, int reg,
+ int count, unsigned char *buf)
{
+ unsigned char zero = 0;
int ret;
- ret = i2c_add_driver(&pm860x_driver);
- if (ret != 0)
- pr_err("Failed to register 88PM860x I2C driver: %d\n", ret);
+
+ i2c_lock_adapter(i2c->adapter);
+ read_device(i2c, 0xfa, 0, &zero);
+ read_device(i2c, 0xfb, 0, &zero);
+ read_device(i2c, 0xff, 0, &zero);
+ ret = read_device(i2c, reg, count, buf);
+ read_device(i2c, 0xFE, 0, &zero);
+ read_device(i2c, 0xFC, 0, &zero);
+ i2c_unlock_adapter(i2c->adapter);
return ret;
}
-subsys_initcall(pm860x_i2c_init);
+EXPORT_SYMBOL(pm860x_page_bulk_read);
-static void __exit pm860x_i2c_exit(void)
+int pm860x_page_bulk_write(struct i2c_client *i2c, int reg,
+ int count, unsigned char *buf)
{
- i2c_del_driver(&pm860x_driver);
+ unsigned char zero = 0;
+ int ret;
+
+ i2c_lock_adapter(i2c->adapter);
+ read_device(i2c, 0xFA, 0, &zero);
+ read_device(i2c, 0xFB, 0, &zero);
+ read_device(i2c, 0xFF, 0, &zero);
+ ret = write_device(i2c, reg, count, buf);
+ read_device(i2c, 0xFE, 0, &zero);
+ read_device(i2c, 0xFC, 0, &zero);
+ i2c_unlock_adapter(i2c->adapter);
+ i2c_unlock_adapter(i2c->adapter);
+ return ret;
}
-module_exit(pm860x_i2c_exit);
+EXPORT_SYMBOL(pm860x_page_bulk_write);
+
+int pm860x_page_set_bits(struct i2c_client *i2c, int reg,
+ unsigned char mask, unsigned char data)
+{
+ unsigned char zero;
+ unsigned char value;
+ int ret;
-MODULE_DESCRIPTION("I2C Driver for Marvell 88PM860x");
-MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
-MODULE_LICENSE("GPL");
+ i2c_lock_adapter(i2c->adapter);
+ read_device(i2c, 0xFA, 0, &zero);
+ read_device(i2c, 0xFB, 0, &zero);
+ read_device(i2c, 0xFF, 0, &zero);
+ ret = read_device(i2c, reg, 1, &value);
+ if (ret < 0)
+ goto out;
+ value &= ~mask;
+ value |= data;
+ ret = write_device(i2c, reg, 1, &value);
+out:
+ read_device(i2c, 0xFE, 0, &zero);
+ read_device(i2c, 0xFC, 0, &zero);
+ i2c_unlock_adapter(i2c->adapter);
+ return ret;
+}
+EXPORT_SYMBOL(pm860x_page_set_bits);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-03 18:34:57 +0000