thermal: intel: int340x: Fix Panther Lake DLVR support

JIRA: https://issues.redhat.com/browse/RHEL-88233

Build Info: 67417798

Tested: Successful platform test results on Intel (intel-pantherlake-h-02) system.

commit 00c5ff5
Author: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Date:   Fri Apr 11 04:54:38 2025 -0700

    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>

Signed-off-by: Steve Best <sbest@redhat.com>

Author: sfbest

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;