target/linux/imx6/patches-4.3/207-i2c-imx-add-retries-for-NAK-s-on-ventana-boards.patch

   1 --- a/drivers/i2c/busses/i2c-imx.c
   2 +++ b/drivers/i2c/busses/i2c-imx.c
   3 @@ -461,6 +461,8 @@ static int i2c_imx_acked(struct imx_i2c_
   4  {
   5         if (imx_i2c_read_reg(i2c_imx, IMX_I2C_I2SR) & I2SR_RXAK) {
   6                 dev_dbg(&i2c_imx->adapter.dev, "<%s> No ACK\n", __func__);
   7 +               if (i2c_imx->adapter.retries)
   8 +                       return -EAGAIN;
   9                 return -EIO;  /* No ACK */
  10         }
  11
  12 @@ -1010,6 +1012,10 @@ static int i2c_imx_probe(struct platform
  13         i2c_imx->adapter.nr             = pdev->id;
  14         i2c_imx->adapter.dev.of_node    = pdev->dev.of_node;
  15         i2c_imx->base                   = base;
  16 +       if (of_machine_is_compatible("gw,ventana") && phy_addr == 0x021a0000) {
  17 +               dev_info(&pdev->dev, "Adding retries for Ventana GSC\n");
  18 +               i2c_imx->adapter.retries = 3;
  19 +       }
  20
  21         /* Get I2C clock */
  22         i2c_imx->clk = devm_clk_get(&pdev->dev, NULL);