From 84b8694433c8ac0c13acd2b247fde682751e0ff2 Mon Sep 17 00:00:00 2001 From: Karol Kolacinski Date: Mon, 23 Jun 2025 17:30:02 -0700 Subject: [PATCH] ice: fall back to TCXO on TSPLL lock fail TSPLL can fail when trying to lock to TIME_REF as a clock source, e.g. when the external clock source is not stable or connected to the board. To continue operation after failure, try to lock again to internal TCXO and inform user about this. Reviewed-by: Milena Olech Signed-off-by: Karol Kolacinski Tested-by: Rinitha S Signed-off-by: Tony Nguyen --- drivers/net/ethernet/intel/ice/ice_tspll.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/ice/ice_tspll.c b/drivers/net/ethernet/intel/ice/ice_tspll.c index abd9f4ff2f556..886a18b2e65fa 100644 --- a/drivers/net/ethernet/intel/ice/ice_tspll.c +++ b/drivers/net/ethernet/intel/ice/ice_tspll.c @@ -605,5 +605,17 @@ int ice_tspll_init(struct ice_hw *hw) /* Configure the TSPLL using the parameters from the function * capabilities. */ - return ice_tspll_cfg(hw, tspll_freq, clk_src); + err = ice_tspll_cfg(hw, tspll_freq, clk_src); + if (err) { + dev_warn(ice_hw_to_dev(hw), "Failed to lock TSPLL to predefined frequency. Retrying with fallback frequency.\n"); + + /* Try to lock to internal TCXO as a fallback. */ + tspll_freq = ice_tspll_default_freq(hw->mac_type); + clk_src = ICE_CLK_SRC_TCXO; + err = ice_tspll_cfg(hw, tspll_freq, clk_src); + if (err) + dev_warn(ice_hw_to_dev(hw), "Failed to lock TSPLL to fallback frequency.\n"); + } + + return err; } -- 2.47.2