mfd: Avoid tps6586x burst writes

tps6586 does not support burst writes. i2c writes have to be
1 byte at a time.

Cc: stable@kernel.org
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

diff --git a/drivers/mfd/tps6586x.c b/drivers/mfd/tps6586x.c
index 627cf577b16d2ea2f696a7806de74ad950494618..e9018d1394ee7d8a6044c1c252a2f6d38f8470c3 100644 (file)
--- a/drivers/mfd/tps6586x.c
+++ b/drivers/mfd/tps6586x.c
@@ -150,12 +150,12 @@ static inline int __tps6586x_write(struct i2c_client *client,
 static inline int __tps6586x_writes(struct i2c_client *client, int reg,
                                  int len, uint8_t *val)
 {
-       int ret;
+       int ret, i;
 
-       ret = i2c_smbus_write_i2c_block_data(client, reg, len, val);
-       if (ret < 0) {
-               dev_err(&client->dev, "failed writings to 0x%02x\n", reg);
-               return ret;
+       for (i = 0; i < len; i++) {
+               ret = __tps6586x_write(client, reg + i, *(val + i));
+               if (ret < 0)
+                       return ret;
        }
 
        return 0;