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eeprom: at24: add regmap-based write function

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Add a regmap-based write function.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
This commit is contained in:
Heiner Kallweit 2017-11-28 21:51:45 +01:00 committed by Bartosz Golaszewski
parent 4604948641
commit 8e5888e17f
1 changed files with 26 additions and 1 deletions
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27
drivers/misc/eeprom/at24.c
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@ -538,6 +538,31 @@ static ssize_t at24_eeprom_write_smbus_byte(struct at24_data *at24,
return -ETIMEDOUT;
}
static ssize_t at24_regmap_write(struct at24_data *at24, const char *buf,
unsigned int offset, size_t count)
{
unsigned long timeout, write_time;
struct at24_client *at24_client;
struct i2c_client *client;
struct regmap *regmap;
int ret;
at24_client = at24_translate_offset(at24, &offset);
regmap = at24_client->regmap;
client = at24_client->client;
count = at24_adjust_write_count(at24, offset, count);
loop_until_timeout(timeout, write_time) {
ret = regmap_bulk_write(regmap, offset, buf, count);
dev_dbg(&client->dev, "write %zu@%d --> %d (%ld)\n",
count, offset, ret, jiffies);
if (!ret)
return count;
}
return -ETIMEDOUT;
}
static ssize_t at24_eeprom_write_i2c(struct at24_data *at24, const char *buf,
unsigned int offset, size_t count)
{
@ -653,7 +678,7 @@ static int at24_write(void *priv, unsigned int off, void *val, size_t count)
while (count) {
int status;
status = at24->write_func(at24, buf, off, count);
status = at24_regmap_write(at24, buf, off, count);
if (status < 0) {
mutex_unlock(&at24->lock);
pm_runtime_put(dev);