diff options
Diffstat (limited to 'drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c')
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c index bf9f82f4b1a..24117709d6a 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c @@ -1582,13 +1582,21 @@ static s32 ixgbe_clock_out_i2c_bit(struct ixgbe_hw *hw, bool data) **/ static void ixgbe_raise_i2c_clk(struct ixgbe_hw *hw, u32 *i2cctl) { - *i2cctl |= IXGBE_I2C_CLK_OUT; - - IXGBE_WRITE_REG(hw, IXGBE_I2CCTL, *i2cctl); - IXGBE_WRITE_FLUSH(hw); + u32 i = 0; + u32 timeout = IXGBE_I2C_CLOCK_STRETCHING_TIMEOUT; + u32 i2cctl_r = 0; - /* SCL rise time (1000ns) */ - udelay(IXGBE_I2C_T_RISE); + for (i = 0; i < timeout; i++) { + *i2cctl |= IXGBE_I2C_CLK_OUT; + IXGBE_WRITE_REG(hw, IXGBE_I2CCTL, *i2cctl); + IXGBE_WRITE_FLUSH(hw); + /* SCL rise time (1000ns) */ + udelay(IXGBE_I2C_T_RISE); + + i2cctl_r = IXGBE_READ_REG(hw, IXGBE_I2CCTL); + if (i2cctl_r & IXGBE_I2C_CLK_IN) + break; + } } /** |