wifi: iwlwifi: pcie: print function scratch before writing

We may want to know the value of this register for certain
debug scenarios before we overwrite it, it indicates which
parts of the chip have recently been reset.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20240729201718.737e5f8bb8df.Ia3f3637ac4a0fb4b35ffd652f92eb75de652ee12@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c
index 18dda89b7985b4fa3a474f29ceaaf48890f843cd..8903a5692dfbbddc98be75af6959ab6560f272c4 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c
@@ -526,6 +526,8 @@ int iwl_trans_pcie_gen2_start_fw(struct iwl_trans *trans,
        keep_ram_busy = !iwl_pcie_set_ltr(trans);
 
        if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ) {
+               IWL_DEBUG_POWER(trans, "function scratch register value is 0x%08x\n",
+                               iwl_read32(trans, CSR_FUNC_SCRATCH));
                iwl_write32(trans, CSR_FUNC_SCRATCH, CSR_FUNC_SCRATCH_INIT_VALUE);
                iwl_set_bit(trans, CSR_GP_CNTRL,
                            CSR_GP_CNTRL_REG_FLAG_ROM_START);