i2c: mvtwsi: Swab the register address if its size is > 1

[platform/kernel/u-boot.git] / drivers / i2c / mvtwsi.c

diff --git a/drivers/i2c/mvtwsi.c b/drivers/i2c/mvtwsi.c
index 236bfb8..ff21e3c 100644 (file)
--- 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);
 }