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

   1 Index: linux-4.3/drivers/i2c/busses/i2c-imx.c
   2 ===================================================================
   3 --- linux-4.3.orig/drivers/i2c/busses/i2c-imx.c 2015-11-01 16:05:25.000000000 -0800
   4 +++ linux-4.3/drivers/i2c/busses/i2c-imx.c      2015-12-18 10:39:44.971158318 -0800
   5 @@ -461,6 +461,8 @@
   6  {
   7         if (imx_i2c_read_reg(i2c_imx, IMX_I2C_I2SR) & I2SR_RXAK) {
   8                 dev_dbg(&i2c_imx->adapter.dev, "<%s> No ACK\n", __func__);
   9 +               if (i2c_imx->adapter.retries)
  10 +                       return -EAGAIN;
  11                 return -EIO;  /* No ACK */
  12         }
  13
  14 @@ -1010,6 +1012,10 @@
  15         i2c_imx->adapter.nr             = pdev->id;
  16         i2c_imx->adapter.dev.of_node    = pdev->dev.of_node;
  17         i2c_imx->base                   = base;
  18 +       if (of_machine_is_compatible("gw,ventana") && phy_addr == 0x021a0000) {
  19 +               dev_info(&pdev->dev, "Adding retries for Ventana GSC\n");
  20 +               i2c_imx->adapter.retries = 3;
  21 +       }
  22
  23         /* Get I2C clock */
  24         i2c_imx->clk = devm_clk_get(&pdev->dev, NULL);