thermal: intel: int340x: Fix Panther Lake DLVR support

Panther Lake uses the same DLVR register offsets as Lunar Lake, but the
driver uses the default register offsets table for it by mistake.

Move the selection of register offsets table from the actual attribute
read/write callbacks to proc_thermal_rfim_add() and make it handle
Panther Lake the same way as Lunar Lake.  This way it is clean and in
the future such issues can be avoided.

Fixes: e50eeab ("thermal: intel: int340x: Panther Lake DLVR support")
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://patch.msgid.link/20250411115438.594114-1-srinivas.pandruvada@linux.intel.com
[ rjw: Changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Author: spandruvada

drivers/thermal/intel/int340x_thermal/processor_thermal_rfim.c

@@ -166,15 +166,18 @@ static const struct mmio_reg adl_dvfs_mmio_regs[] = {
 	{ 0, 0x5A40, 1, 0x1, 0}, /* rfi_disable */
 };
 
+static const struct mapping_table *dlvr_mapping;
+static const struct mmio_reg *dlvr_mmio_regs_table;
+
 #define RFIM_SHOW(suffix, table)\
 static ssize_t suffix##_show(struct device *dev,\
 			      struct device_attribute *attr,\
 			      char *buf)\
 {\
-	const struct mapping_table *mapping = NULL;\
+	const struct mmio_reg *mmio_regs = dlvr_mmio_regs_table;\
+	const struct mapping_table *mapping = dlvr_mapping;\
 	struct proc_thermal_device *proc_priv;\
 	struct pci_dev *pdev = to_pci_dev(dev);\
-	const struct mmio_reg *mmio_regs;\
 	const char **match_strs;\
 	int ret, err;\
 	u32 reg_val;\
@@ -186,12 +189,6 @@ static ssize_t suffix##_show(struct device *dev,\
 		mmio_regs = adl_dvfs_mmio_regs;\
 	} else if (table == 2) { \
 		match_strs = (const char **)dlvr_strings;\
-		if (pdev->device == PCI_DEVICE_ID_INTEL_LNLM_THERMAL) {\
-			mmio_regs = lnl_dlvr_mmio_regs;\
-			mapping = lnl_dlvr_mapping;\
-		} else {\
-			mmio_regs = dlvr_mmio_regs;\
-		} \
 	} else {\
 		match_strs = (const char **)fivr_strings;\
 		mmio_regs = tgl_fivr_mmio_regs;\
@@ -214,12 +211,12 @@ static ssize_t suffix##_store(struct device *dev,\
 			       struct device_attribute *attr,\
 			       const char *buf, size_t count)\
 {\
-	const struct mapping_table *mapping = NULL;\
+	const struct mmio_reg *mmio_regs = dlvr_mmio_regs_table;\
+	const struct mapping_table *mapping = dlvr_mapping;\
 	struct proc_thermal_device *proc_priv;\
 	struct pci_dev *pdev = to_pci_dev(dev);\
 	unsigned int input;\
 	const char **match_strs;\
-	const struct mmio_reg *mmio_regs;\
 	int ret, err;\
 	u32 reg_val;\
 	u32 mask;\
@@ -230,12 +227,6 @@ static ssize_t suffix##_store(struct device *dev,\
 		mmio_regs = adl_dvfs_mmio_regs;\
 	} else if (table == 2) { \
 		match_strs = (const char **)dlvr_strings;\
-		if (pdev->device == PCI_DEVICE_ID_INTEL_LNLM_THERMAL) {\
-			mmio_regs = lnl_dlvr_mmio_regs;\
-			mapping = lnl_dlvr_mapping;\
-		} else {\
-			mmio_regs = dlvr_mmio_regs;\
-		} \
 	} else {\
 		match_strs = (const char **)fivr_strings;\
 		mmio_regs = tgl_fivr_mmio_regs;\
@@ -448,6 +439,16 @@ int proc_thermal_rfim_add(struct pci_dev *pdev, struct proc_thermal_device *proc
 	}
 
 	if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_DLVR) {
+		switch (pdev->device) {
+		case PCI_DEVICE_ID_INTEL_LNLM_THERMAL:
+		case PCI_DEVICE_ID_INTEL_PTL_THERMAL:
+			dlvr_mmio_regs_table = lnl_dlvr_mmio_regs;
+			dlvr_mapping = lnl_dlvr_mapping;
+			break;
+		default:
+			dlvr_mmio_regs_table = dlvr_mmio_regs;
+			break;
+		}
 		ret = sysfs_create_group(&pdev->dev.kobj, &dlvr_attribute_group);
 		if (ret)
 			return ret;