diff mbox series

[06/12] wifi: iwlwifi: add support for external 32 KHz clock

Message ID 20250212073923.9aae3f74fee0.I25ae45ef02b9ea387b512f974c1f3e5367a537e5@changeid
State New
Headers show
Series wifi: iwlwifi: updates - 2025-02-12 | expand

Commit Message

Miri Korenblit Feb. 12, 2025, 5:43 a.m. UTC 
From: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

In case the BIOS allows it, instruct the firmware to use the external 32
KHz clock.
The op mode specific implementation (i.e. reading the BIOS table) will
come in a later patch.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 .../net/wireless/intel/iwlwifi/iwl-context-info-gen3.h    | 8 +++++---
 drivers/net/wireless/intel/iwlwifi/iwl-trans.h            | 3 +++
 drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info-gen3.c  | 5 ++++-
 3 files changed, 12 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-context-info-gen3.h b/drivers/net/wireless/intel/iwlwifi/iwl-context-info-gen3.h
index cd25a1b9f2ff..20563a32a21a 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-context-info-gen3.h
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-context-info-gen3.h
@@ -1,6 +1,6 @@ 
 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
 /*
- * Copyright (C) 2018, 2020-2024 Intel Corporation
+ * Copyright (C) 2018, 2020-2025 Intel Corporation
  */
 #ifndef __iwl_context_info_file_gen3_h__
 #define __iwl_context_info_file_gen3_h__
@@ -80,10 +80,12 @@  enum iwl_prph_scratch_flags {
  * enum iwl_prph_scratch_ext_flags - PRPH scratch control ext flags
  * @IWL_PRPH_SCRATCH_EXT_URM_FW: switch to URM mode based on fw setting
  * @IWL_PRPH_SCRATCH_EXT_URM_PERM: switch to permanent URM mode
+ * @IWL_PRPH_SCRATCH_EXT_32KHZ_CLK_VALID: use external 32 KHz clock
  */
 enum iwl_prph_scratch_ext_flags {
-	IWL_PRPH_SCRATCH_EXT_URM_FW	= BIT(4),
-	IWL_PRPH_SCRATCH_EXT_URM_PERM	= BIT(5),
+	IWL_PRPH_SCRATCH_EXT_URM_FW		= BIT(4),
+	IWL_PRPH_SCRATCH_EXT_URM_PERM		= BIT(5),
+	IWL_PRPH_SCRATCH_EXT_32KHZ_CLK_VALID	= BIT(8),
 };
 
 /**
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
index 021691513a57..25fb4c50e38b 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
@@ -888,6 +888,7 @@  struct iwl_txq {
  * @trans_specific: data for the specific transport this is allocated for/with
  * @dsbr_urm_fw_dependent: switch to URM based on fw settings
  * @dsbr_urm_permanent: switch to URM permanently
+ * @ext_32khz_clock_valid: if true, the external 32 KHz clock can be used
  */
 struct iwl_trans {
 	bool csme_own;
@@ -916,6 +917,8 @@  struct iwl_trans {
 	u8 dsbr_urm_fw_dependent:1,
 	   dsbr_urm_permanent:1;
 
+	bool ext_32khz_clock_valid;
+
 	u8 rx_mpdu_cmd, rx_mpdu_cmd_hdr_size;
 
 	bool pm_support;
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info-gen3.c b/drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info-gen3.c
index 838c426db7f0..8aa7c455bdee 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info-gen3.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info-gen3.c
@@ -1,6 +1,6 @@ 
 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
 /*
- * Copyright (C) 2018-2024 Intel Corporation
+ * Copyright (C) 2018-2025 Intel Corporation
  */
 #include <linux/dmi.h>
 #include "iwl-trans.h"
@@ -137,6 +137,9 @@  int iwl_pcie_ctxt_info_gen3_init(struct iwl_trans *trans,
 	if (trans->dsbr_urm_permanent)
 		control_flags_ext |= IWL_PRPH_SCRATCH_EXT_URM_PERM;
 
+	if (trans->ext_32khz_clock_valid)
+		control_flags_ext |= IWL_PRPH_SCRATCH_EXT_32KHZ_CLK_VALID;
+
 	/* Allocate prph scratch */
 	prph_scratch = dma_alloc_coherent(trans->dev, sizeof(*prph_scratch),
 					  &trans_pcie->prph_scratch_dma_addr,