[PATCH RFC 3/7] eeprom: at24: add regmap-based write function

[Heiner Kallweit <hkallweit1@gmail.com>]

Add a regmap-based write function.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 drivers/misc/eeprom/at24.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c
index 7cd746de..4e4225b2 100644
--- a/drivers/misc/eeprom/at24.c
+++ b/drivers/misc/eeprom/at24.c
@@ -465,6 +465,22 @@ 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 regmap *regmap;
+
+	regmap = at24_translate_offset(at24, &offset)->regmap;
+	count = at24_adjust_write_count(at24, offset, count);
+
+	loop_until_timeout(timeout, write_time)
+		if (!regmap_bulk_write(regmap, offset, buf, count))
+			return count;
+
+	return -ETIMEDOUT;
+}
+
 static ssize_t at24_eeprom_write_i2c(struct at24_data *at24, const char *buf,
 				     unsigned int offset, size_t count)
 {
@@ -553,7 +569,7 @@ 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);
 			return status;
-- 
2.14.1