iwlwifi: acpi: move code that reads SPLC to acpi

Move most of the set_dflt_pwr_limit() function to acpi.c and make it
return the pwr_limit value instead of setting directly.  Also rename
it to iwl_acpi_get_pwr_limit().
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/fw/acpi.c

@@ -181,3 +181,30 @@ int iwl_acpi_get_mcc(struct device *dev, char *mcc)
 	return ret;
 }
 IWL_EXPORT_SYMBOL(iwl_acpi_get_mcc);
+
+u64 iwl_acpi_get_pwr_limit(struct device *dev)
+{
+	union acpi_object *data, *wifi_pkg;
+	u64 dflt_pwr_limit;
+
+	data = iwl_acpi_get_object(dev, ACPI_SPLC_METHOD);
+	if (IS_ERR(data)) {
+		dflt_pwr_limit = 0;
+		goto out;
+	}
+
+	wifi_pkg = iwl_acpi_get_wifi_pkg(dev, data,
+					 ACPI_SPLC_WIFI_DATA_SIZE);
+	if (IS_ERR(wifi_pkg) ||
+	    wifi_pkg->package.elements[1].integer.value != ACPI_TYPE_INTEGER) {
+		dflt_pwr_limit = 0;
+		goto out_free;
+	}
+
+	dflt_pwr_limit = wifi_pkg->package.elements[1].integer.value;
+out_free:
+	kfree(data);
+out:
+	return dflt_pwr_limit;
+}
+IWL_EXPORT_SYMBOL(iwl_acpi_get_pwr_limit);

drivers/net/wireless/intel/iwlwifi/fw/acpi.h

@@ -108,6 +108,8 @@ union acpi_object *iwl_acpi_get_wifi_pkg(struct device *dev,
  */
 int iwl_acpi_get_mcc(struct device *dev, char *mcc);
 
+u64 iwl_acpi_get_pwr_limit(struct device *dev);
+
 #else /* CONFIG_ACPI */
 
 static inline void *iwl_acpi_get_object(struct device *dev, acpi_string method)
@@ -127,5 +129,10 @@ static inline int iwl_acpi_get_mcc(struct device *dev, char *mcc)
 	return -ENOENT;
 }
 
+static inline u64 iwl_acpi_get_pwr_limit(struct device *dev)
+{
+	return 0;
+}
+
 #endif /* CONFIG_ACPI */
 #endif /* __iwl_fw_acpi__ */

drivers/net/wireless/intel/iwlwifi/pcie/drv.c

@@ -78,6 +78,7 @@
 #include "iwl-trans.h"
 #include "iwl-drv.h"
 #include "internal.h"
+#include "fw/acpi.h"
 
 #define IWL_PCI_DEVICE(dev, subdev, cfg) \
 	.vendor = PCI_VENDOR_ID_INTEL,  .device = (dev), \
@@ -587,28 +588,6 @@ static const struct pci_device_id iwl_hw_card_ids[] = {
 };
 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
 
-static void set_dflt_pwr_limit(struct iwl_trans *trans, struct pci_dev *pdev)
-{
-	union acpi_object *data, *wifi_pkg;
-
-	data = iwl_acpi_get_object(trans->dev, ACPI_SPLC_METHOD);
-	if (IS_ERR(data))
-		return;
-
-	wifi_pkg = iwl_acpi_get_wifi_pkg(trans->dev, data,
-					 ACPI_SPLC_WIFI_DATA_SIZE);
-	if (IS_ERR(wifi_pkg) ||
-	    wifi_pkg->package.elements[1].integer.value != ACPI_TYPE_INTEGER)
-		goto out;
-
-	trans->dflt_pwr_limit = wifi_pkg->package.elements[1].integer.value;
-
-	IWL_DEBUG_INFO(trans, "Default power limit set to %lld\n",
-		       trans->dflt_pwr_limit);
-out:
-	kfree(data);
-}
-
 /* PCI registers */
 #define PCI_CFG_RETRY_TIMEOUT	0x041
 
@@ -672,7 +651,7 @@ static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto out_free_trans;
 	}
 
-	set_dflt_pwr_limit(iwl_trans, pdev);
+	iwl_trans->dflt_pwr_limit = iwl_acpi_get_pwr_limit(iwl_trans->dev);
 
 	/* register transport layer debugfs here */
 	ret = iwl_trans_pcie_dbgfs_register(iwl_trans);