platform/x86:intel/pmc: Create generic_core_init() for all platforms

Create a generic_core_init() function for all architectures to reduce
duplicate code in each architecture file. Create an info structure
to catch the variations between each architecture and pass it to the
generic init function.

Convert all architectures to call the generic core init function.

Signed-off-by: Xi Pardee <xi.pardee@linux.intel.com>
Link: https://lore.kernel.org/r/20250207225615.401235-4-xi.pardee@linux.intel.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

drivers/platform/x86/intel/pmc/adl.c

@@ -311,20 +311,13 @@ const struct pmc_reg_map adl_reg_map = {
 	.pson_residency_counter_step = TGL_PSON_RES_COUNTER_STEP,
 };
 
+static struct pmc_dev_info adl_pmc_dev = {
+	.map = &adl_reg_map,
+	.suspend = cnl_suspend,
+	.resume = cnl_resume,
+};
+
 int adl_core_init(struct pmc_dev *pmcdev)
 {
-	struct pmc *pmc = pmcdev->pmcs[PMC_IDX_MAIN];
-	int ret;
-
-	pmcdev->suspend = cnl_suspend;
-	pmcdev->resume = cnl_resume;
-
-	pmc->map = &adl_reg_map;
-	ret = get_primary_reg_base(pmc);
-	if (ret)
-		return ret;
-
-	pmc_core_get_low_power_modes(pmcdev);
-
-	return 0;
+	return generic_core_init(pmcdev, &adl_pmc_dev);
 }

drivers/platform/x86/intel/pmc/arl.c

@@ -691,40 +691,17 @@ static int arl_resume(struct pmc_dev *pmcdev)
 	return cnl_resume(pmcdev);
 }
 
+static struct pmc_dev_info arl_pmc_dev = {
+	.pci_func = 0,
+	.dmu_guid = ARL_PMT_DMU_GUID,
+	.regmap_list = arl_pmc_info_list,
+	.map = &arl_socs_reg_map,
+	.suspend = cnl_suspend,
+	.resume = arl_resume,
+};
+
 int arl_core_init(struct pmc_dev *pmcdev)
 {
-	struct pmc *pmc = pmcdev->pmcs[PMC_IDX_MAIN];
-	int ret;
-	int func = 0;
-	bool ssram_init = true;
-
 	arl_d3_fixup();
-	pmcdev->suspend = cnl_suspend;
-	pmcdev->resume = arl_resume;
-	pmcdev->regmap_list = arl_pmc_info_list;
-
-	/*
-	 * If ssram init fails use legacy method to at least get the
-	 * primary PMC
-	 */
-	ret = pmc_core_ssram_init(pmcdev, func);
-	if (ret) {
-		ssram_init = false;
-		pmc->map = &arl_socs_reg_map;
-
-		ret = get_primary_reg_base(pmc);
-		if (ret)
-			return ret;
-	}
-
-	pmc_core_get_low_power_modes(pmcdev);
-	pmc_core_punit_pmt_init(pmcdev, ARL_PMT_DMU_GUID);
-
-	if (ssram_init)	{
-		ret = pmc_core_ssram_get_lpm_reqs(pmcdev);
-		if (ret)
-			return ret;
-	}
-
-	return 0;
+	return generic_core_init(pmcdev, &arl_pmc_dev);
 }

drivers/platform/x86/intel/pmc/cnp.c

@@ -274,20 +274,13 @@ int cnl_resume(struct pmc_dev *pmcdev)
 	return pmc_core_resume_common(pmcdev);
 }
 
+static struct pmc_dev_info cnp_pmc_dev = {
+	.map = &cnp_reg_map,
+	.suspend = cnl_suspend,
+	.resume = cnl_resume,
+};
+
 int cnp_core_init(struct pmc_dev *pmcdev)
 {
-	struct pmc *pmc = pmcdev->pmcs[PMC_IDX_MAIN];
-	int ret;
-
-	pmcdev->suspend = cnl_suspend;
-	pmcdev->resume = cnl_resume;
-
-	pmc->map = &cnp_reg_map;
-	ret = get_primary_reg_base(pmc);
-	if (ret)
-		return ret;
-
-	pmc_core_get_low_power_modes(pmcdev);
-
-	return 0;
+	return generic_core_init(pmcdev, &cnp_pmc_dev);
 }

drivers/platform/x86/intel/pmc/core.c

@@ -1345,6 +1345,48 @@ static void pmc_core_dbgfs_register(struct pmc_dev *pmcdev)
 	}
 }
 
+/*
+ * When supported, ssram init is used to achieve all available PMCs.
+ * If ssram init fails, this function uses legacy method to at least get the
+ * primary PMC.
+ */
+int generic_core_init(struct pmc_dev *pmcdev, struct pmc_dev_info *pmc_dev_info)
+{
+	struct pmc *pmc = pmcdev->pmcs[PMC_IDX_MAIN];
+	bool ssram;
+	int ret;
+
+	pmcdev->suspend = pmc_dev_info->suspend;
+	pmcdev->resume = pmc_dev_info->resume;
+
+	ssram = pmc_dev_info->regmap_list != NULL;
+	if (ssram) {
+		pmcdev->regmap_list = pmc_dev_info->regmap_list;
+		ret = pmc_core_ssram_init(pmcdev, pmc_dev_info->pci_func);
+		if (ret) {
+			dev_warn(&pmcdev->pdev->dev,
+				 "ssram init failed, %d, using legacy init\n", ret);
+			ssram = false;
+		}
+	}
+
+	if (!ssram) {
+		pmc->map = pmc_dev_info->map;
+		ret = get_primary_reg_base(pmc);
+		if (ret)
+			return ret;
+	}
+
+	pmc_core_get_low_power_modes(pmcdev);
+	if (pmc_dev_info->dmu_guid)
+		pmc_core_punit_pmt_init(pmcdev, pmc_dev_info->dmu_guid);
+
+	if (ssram)
+		return pmc_core_ssram_get_lpm_reqs(pmcdev);
+
+	return 0;
+}
+
 static const struct x86_cpu_id intel_pmc_core_ids[] = {
 	X86_MATCH_VFM(INTEL_SKYLAKE_L,		spt_core_init),
 	X86_MATCH_VFM(INTEL_SKYLAKE,		spt_core_init),

drivers/platform/x86/intel/pmc/core.h

@@ -435,6 +435,27 @@ enum pmc_index {
 	PMC_IDX_MAX
 };
 
+/**
+ * struct pmc_dev_info - Structure to keep PMC device info
+ * @pci_func:		Function number of the primary PMC
+ * @dmu_guid:		Die Management Unit GUID
+ * @regmap_list:	Pointer to a list of pmc_info structure that could be
+ *			available for the platform. When set, this field implies
+ *			SSRAM support.
+ * @map:		Pointer to a pmc_reg_map struct that contains platform
+ *			specific attributes of the primary PMC
+ * @suspend:		Function to perform platform specific suspend
+ * @resume:		Function to perform platform specific resume
+ */
+struct pmc_dev_info {
+	u8 pci_func;
+	u32 dmu_guid;
+	struct pmc_info *regmap_list;
+	const struct pmc_reg_map *map;
+	void (*suspend)(struct pmc_dev *pmcdev);
+	int (*resume)(struct pmc_dev *pmcdev);
+};
+
 extern const struct pmc_bit_map msr_map[];
 extern const struct pmc_bit_map spt_pll_map[];
 extern const struct pmc_bit_map spt_mphy_map[];
@@ -591,6 +612,7 @@ extern void pmc_core_set_device_d3(unsigned int device);
 
 extern int pmc_core_ssram_init(struct pmc_dev *pmcdev, int func);
 
+int generic_core_init(struct pmc_dev *pmcdev, struct pmc_dev_info *pmc_dev_info);
 int spt_core_init(struct pmc_dev *pmcdev);
 int cnp_core_init(struct pmc_dev *pmcdev);
 int icl_core_init(struct pmc_dev *pmcdev);

drivers/platform/x86/intel/pmc/icl.c

@@ -50,18 +50,11 @@ const struct pmc_reg_map icl_reg_map = {
 	.etr3_offset = ETR3_OFFSET,
 };
 
+static struct pmc_dev_info icl_pmc_dev = {
+	.map = &icl_reg_map,
+};
+
 int icl_core_init(struct pmc_dev *pmcdev)
 {
-	struct pmc *pmc = pmcdev->pmcs[PMC_IDX_MAIN];
-	int ret;
-
-	pmc->map = &icl_reg_map;
-
-	ret = get_primary_reg_base(pmc);
-	if (ret)
-		return ret;
-
-	pmc_core_get_low_power_modes(pmcdev);
-
-	return ret;
+	return generic_core_init(pmcdev, &icl_pmc_dev);
 }

drivers/platform/x86/intel/pmc/lnl.c

@@ -550,22 +550,14 @@ static int lnl_resume(struct pmc_dev *pmcdev)
 	return cnl_resume(pmcdev);
 }
 
+static struct pmc_dev_info lnl_pmc_dev = {
+	.map = &lnl_socm_reg_map,
+	.suspend = cnl_suspend,
+	.resume = lnl_resume,
+};
+
 int lnl_core_init(struct pmc_dev *pmcdev)
 {
-	int ret;
-	struct pmc *pmc = pmcdev->pmcs[PMC_IDX_MAIN];
-
 	lnl_d3_fixup();
-
-	pmcdev->suspend = cnl_suspend;
-	pmcdev->resume = lnl_resume;
-
-	pmc->map = &lnl_socm_reg_map;
-	ret = get_primary_reg_base(pmc);
-	if (ret)
-		return ret;
-
-	pmc_core_get_low_power_modes(pmcdev);
-
-	return 0;
+	return generic_core_init(pmcdev, &lnl_pmc_dev);
 }

drivers/platform/x86/intel/pmc/mtl.c

@@ -990,39 +990,17 @@ static int mtl_resume(struct pmc_dev *pmcdev)
 	return cnl_resume(pmcdev);
 }
 
+static struct pmc_dev_info mtl_pmc_dev = {
+	.pci_func = 2,
+	.dmu_guid = MTL_PMT_DMU_GUID,
+	.regmap_list = mtl_pmc_info_list,
+	.map = &mtl_socm_reg_map,
+	.suspend = cnl_suspend,
+	.resume = mtl_resume,
+};
+
 int mtl_core_init(struct pmc_dev *pmcdev)
 {
-	struct pmc *pmc = pmcdev->pmcs[PMC_IDX_MAIN];
-	int ret;
-	int func = 2;
-	bool ssram_init = true;
-
 	mtl_d3_fixup();
-
-	pmcdev->suspend = cnl_suspend;
-	pmcdev->resume = mtl_resume;
-	pmcdev->regmap_list = mtl_pmc_info_list;
-
-	/*
-	 * If ssram init fails use legacy method to at least get the
-	 * primary PMC
-	 */
-	ret = pmc_core_ssram_init(pmcdev, func);
-	if (ret) {
-		ssram_init = false;
-		dev_warn(&pmcdev->pdev->dev,
-			 "ssram init failed, %d, using legacy init\n", ret);
-		pmc->map = &mtl_socm_reg_map;
-		ret = get_primary_reg_base(pmc);
-		if (ret)
-			return ret;
-	}
-
-	pmc_core_get_low_power_modes(pmcdev);
-	pmc_core_punit_pmt_init(pmcdev, MTL_PMT_DMU_GUID);
-
-	if (ssram_init)
-		return pmc_core_ssram_get_lpm_reqs(pmcdev);
-
-	return 0;
+	return generic_core_init(pmcdev, &mtl_pmc_dev);
 }

drivers/platform/x86/intel/pmc/spt.c

@@ -134,18 +134,11 @@ const struct pmc_reg_map spt_reg_map = {
 	.pm_vric1_offset = SPT_PMC_VRIC1_OFFSET,
 };
 
+static struct pmc_dev_info spt_pmc_dev = {
+	.map = &spt_reg_map,
+};
+
 int spt_core_init(struct pmc_dev *pmcdev)
 {
-	struct pmc *pmc = pmcdev->pmcs[PMC_IDX_MAIN];
-	int ret;
-
-	pmc->map = &spt_reg_map;
-
-	ret = get_primary_reg_base(pmc);
-	if (ret)
-		return ret;
-
-	pmc_core_get_low_power_modes(pmcdev);
-
-	return ret;
+	return generic_core_init(pmcdev, &spt_pmc_dev);
 }

drivers/platform/x86/intel/pmc/tgl.c

@@ -285,35 +285,36 @@ void pmc_core_get_tgl_lpm_reqs(struct platform_device *pdev)
 	ACPI_FREE(out_obj);
 }
 
-static int tgl_core_generic_init(struct pmc_dev *pmcdev, int pch_tp)
-{
-	struct pmc *pmc = pmcdev->pmcs[PMC_IDX_MAIN];
-	int ret;
+static struct pmc_dev_info tgl_l_pmc_dev = {
+	.map = &tgl_reg_map,
+	.suspend = cnl_suspend,
+	.resume = cnl_resume,
+};
 
-	if (pch_tp == PCH_H)
-		pmc->map = &tgl_h_reg_map;
-	else
-		pmc->map = &tgl_reg_map;
+static struct pmc_dev_info tgl_pmc_dev = {
+	.map = &tgl_h_reg_map,
+	.suspend = cnl_suspend,
+	.resume = cnl_resume,
+};
 
-	pmcdev->suspend = cnl_suspend;
-	pmcdev->resume = cnl_resume;
+static int tgl_core_generic_init(struct pmc_dev *pmcdev, struct pmc_dev_info *pmc_dev_info)
+{
+	int ret;
 
-	ret = get_primary_reg_base(pmc);
+	ret = generic_core_init(pmcdev, pmc_dev_info);
 	if (ret)
 		return ret;
 
-	pmc_core_get_low_power_modes(pmcdev);
 	pmc_core_get_tgl_lpm_reqs(pmcdev->pdev);
-
 	return 0;
 }
 
 int tgl_l_core_init(struct pmc_dev *pmcdev)
 {
-	return tgl_core_generic_init(pmcdev, PCH_LP);
+	return tgl_core_generic_init(pmcdev, &tgl_l_pmc_dev);
 }
 
 int tgl_core_init(struct pmc_dev *pmcdev)
 {
-	return tgl_core_generic_init(pmcdev, PCH_H);
+	return tgl_core_generic_init(pmcdev, &tgl_pmc_dev);
 }