6 files changed, 48 insertions, 7 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/acpi.c b/drivers/net/wireless/intel/iwlwifi/fw/acpi.c
index ad04d0ebf081..7b422ebe2241 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/acpi.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/acpi.c
@@ -386,16 +386,17 @@ out:
 	return ret;
 }
 
-int iwl_acpi_get_eckv(struct device *dev, u32 *extl_clk)
+int iwl_acpi_get_eckv(struct iwl_fw_runtime *fwrt, u32 *extl_clk)
 {
 	union acpi_object *wifi_pkg, *data;
 	int ret, tbl_rev;
 
-	data = iwl_acpi_get_object(dev, ACPI_ECKV_METHOD);
+	data = iwl_acpi_get_object(fwrt->dev, ACPI_ECKV_METHOD);
 	if (IS_ERR(data))
 		return PTR_ERR(data);
 
-	wifi_pkg = iwl_acpi_get_wifi_pkg(dev, data, ACPI_ECKV_WIFI_DATA_SIZE,
+	wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
+					 ACPI_ECKV_WIFI_DATA_SIZE,
 					 &tbl_rev);
 	if (IS_ERR(wifi_pkg)) {
 		ret = PTR_ERR(wifi_pkg);
@@ -416,7 +417,6 @@ out_free:
 	kfree(data);
 	return ret;
 }
-IWL_EXPORT_SYMBOL(iwl_acpi_get_eckv);
 
 static int iwl_acpi_sar_set_profile(union acpi_object *table,
 				    struct iwl_sar_profile *profile,
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/acpi.h b/drivers/net/wireless/intel/iwlwifi/fw/acpi.h
index 1cb9271158e7..ac6655c1f777 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/acpi.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/acpi.h
@@ -161,13 +161,13 @@ int iwl_acpi_get_pwr_limit(struct iwl_fw_runtime *fwrt, u64 *dflt_pwr_limit);
 /*
  * iwl_acpi_get_eckv - read external clock validation from ACPI, if available
  *
- * @dev: the struct device
+ * @fwrt: the fw runtime struct
  * @extl_clk: output var (2 bytes) that will get the clk indication.
  *
  * This function tries to read the external clock indication
  * from ACPI if available.
  */
-int iwl_acpi_get_eckv(struct device *dev, u32 *extl_clk);
+int iwl_acpi_get_eckv(struct iwl_fw_runtime *fwrt, u32 *extl_clk);
 
 int iwl_acpi_get_wrds_table(struct iwl_fw_runtime *fwrt);
 
@@ -219,7 +219,7 @@ static inline int iwl_acpi_get_pwr_limit(struct iwl_fw_runtime *fwrt,
 	return 0;
 }
 
-static inline int iwl_acpi_get_eckv(struct device *dev, u32 *extl_clk)
+static inline int iwl_acpi_get_eckv(struct iwl_fw_runtime *fwrt, u32 *extl_clk)
 {
 	return -ENOENT;
 }
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/regulatory.c b/drivers/net/wireless/intel/iwlwifi/fw/regulatory.c
index 65022b1c1511..bb07fbfd81eb 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/regulatory.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/regulatory.c
@@ -37,6 +37,7 @@ IWL_BIOS_TABLE_LOADER(ppag_table);
 IWL_BIOS_TABLE_LOADER_DATA(tas_table, struct iwl_tas_data);
 IWL_BIOS_TABLE_LOADER_DATA(pwr_limit, u64);
 IWL_BIOS_TABLE_LOADER_DATA(mcc, char);
+IWL_BIOS_TABLE_LOADER_DATA(eckv, u32);
 
 
 static const struct dmi_system_id dmi_ppag_approved_list[] = {
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/regulatory.h b/drivers/net/wireless/intel/iwlwifi/fw/regulatory.h
index f75ca5f7faaf..ec408c06235d 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/regulatory.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/regulatory.h
@@ -141,4 +141,5 @@ int iwl_bios_get_pwr_limit(struct iwl_fw_runtime *fwrt,
 			   u64 *dflt_pwr_limit);
 
 int iwl_bios_get_mcc(struct iwl_fw_runtime *fwrt, char *mcc);
+int iwl_bios_get_eckv(struct iwl_fw_runtime *fwrt, u32 *ext_clk);
 #endif /* __fw_regulatory_h__ */
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c
index cd897ad504d6..4454fae84d1f 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c
@@ -652,3 +652,25 @@ out:
 	kfree(data);
 	return ret;
 }
+
+int iwl_uefi_get_eckv(struct iwl_fw_runtime *fwrt, u32 *extl_clk)
+{
+	struct uefi_cnv_var_eckv *data;
+	int ret = 0;
+
+	data = iwl_uefi_get_verified_variable(fwrt->trans, IWL_UEFI_ECKV_NAME,
+					      "ECKV", sizeof(*data), NULL);
+	if (IS_ERR(data))
+		return -EINVAL;
+
+	if (data->revision != IWL_UEFI_ECKV_REVISION) {
+		ret = -EINVAL;
+		IWL_DEBUG_RADIO(fwrt, "Unsupported UEFI WRDD revision:%d\n",
+				data->revision);
+		goto out;
+	}
+	*extl_clk = data->ext_clock_valid;
+out:
+	kfree(data);
+	return ret;
+}
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/uefi.h b/drivers/net/wireless/intel/iwlwifi/fw/uefi.h
index 62bbd5c992b9..723933b0b2f1 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/uefi.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/uefi.h
@@ -19,6 +19,7 @@
 #define IWL_UEFI_WTAS_NAME		L"UefiCnvWlanWTAS"
 #define IWL_UEFI_SPLC_NAME		L"UefiCnvWlanSPLC"
 #define IWL_UEFI_WRDD_NAME		L"UefiCnvWlanWRDD"
+#define IWL_UEFI_ECKV_NAME		L"UefiCnvWlanECKV"
 
 
 #define IWL_SGOM_MAP_SIZE		339
@@ -32,6 +33,7 @@
 #define IWL_UEFI_WTAS_REVISION		1
 #define IWL_UEFI_SPLC_REVISION		0
 #define IWL_UEFI_WRDD_REVISION		0
+#define IWL_UEFI_ECKV_REVISION		0
 
 struct pnvm_sku_package {
 	u8 rev;
@@ -155,6 +157,15 @@ struct uefi_cnv_var_wrdd {
 	u32 mcc;
 } __packed;
 
+/* struct uefi_cnv_var_eckv - ECKV table as defined in UEFI
+ * @revision: the revision of the table
+ * @ext_clock_valid: indicates if external 32KHz clock is valid
+ */
+struct uefi_cnv_var_eckv {
+	u8 revision;
+	u32 ext_clock_valid;
+} __packed;
+
 /*
  * This is known to be broken on v4.19 and to work on v5.4.  Until we
  * figure out why this is the case and how to make it work, simply
@@ -178,6 +189,7 @@ int iwl_uefi_get_tas_table(struct iwl_fw_runtime *fwrt,
 int iwl_uefi_get_pwr_limit(struct iwl_fw_runtime *fwrt,
 			   u64 *dflt_pwr_limit);
 int iwl_uefi_get_mcc(struct iwl_fw_runtime *fwrt, char *mcc);
+int iwl_uefi_get_eckv(struct iwl_fw_runtime *fwrt, u32 *extl_clk);
 #else /* CONFIG_EFI */
 static inline void *iwl_uefi_get_pnvm(struct iwl_trans *trans, size_t *len)
 {
@@ -246,6 +258,11 @@ static inline int iwl_uefi_get_mcc(struct iwl_fw_runtime *fwrt, char *mcc)
 {
 	return -ENOENT;
 }
+
+static inline int iwl_uefi_get_eckv(struct iwl_fw_runtime *fwrt, u32 *extl_clk)
+{
+	return -ENOENT;
+}
 #endif /* CONFIG_EFI */
 
 #if defined(CONFIG_EFI) && defined(CONFIG_ACPI)