diff options
Diffstat (limited to 'drivers/i2c/mvtwsi.c')
| -rw-r--r-- | drivers/i2c/mvtwsi.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/i2c/mvtwsi.c b/drivers/i2c/mvtwsi.c index 236bfb8d8e..ff21e3c52b 100644 --- a/drivers/i2c/mvtwsi.c +++ b/drivers/i2c/mvtwsi.c @@ -860,6 +860,9 @@ static int mvtwsi_i2c_xfer(struct udevice *bus, struct i2c_msg *msg, int nmsgs) { struct mvtwsi_i2c_dev *dev = dev_get_priv(bus); struct i2c_msg *dmsg, *omsg, dummy; + u8 *addr_buf_ptr; + u8 addr_buf[4]; + int i; memset(&dummy, 0, sizeof(struct i2c_msg)); @@ -873,12 +876,17 @@ static int mvtwsi_i2c_xfer(struct udevice *bus, struct i2c_msg *msg, int nmsgs) omsg = nmsgs == 1 ? &dummy : msg; dmsg = nmsgs == 1 ? msg : msg + 1; + /* We need to swap the register address if its size is > 1 */ + addr_buf_ptr = &addr_buf[0]; + for (i = omsg->len; i > 0; i--) + *addr_buf_ptr++ = omsg->buf[i - 1]; + if (dmsg->flags & I2C_M_RD) - return __twsi_i2c_read(dev->base, dmsg->addr, omsg->buf, + return __twsi_i2c_read(dev->base, dmsg->addr, addr_buf, omsg->len, dmsg->buf, dmsg->len, dev->tick); else - return __twsi_i2c_write(dev->base, dmsg->addr, omsg->buf, + return __twsi_i2c_write(dev->base, dmsg->addr, addr_buf, omsg->len, dmsg->buf, dmsg->len, dev->tick); } |