soc/intel: Replace config_of_path() with config_of_soc()

The previously provided device path made no difference, all
integrated PCI devices point back to the same chip_info
structure.

Change reduces the exposure of various SA_DEVFN_xx and
PCH_DEVFN_xx from (ugly) soc/pci_devs.h.

Change-Id: Ibf13645fdd3ef7fd3d5c8217bb24d7ede045c790
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35656
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

46 files changed, 72 insertions, 79 deletions

diff --git a/src/include/device/device.h b/src/include/device/device.h
index f24e4b2157..cb37c096e4 100644
--- a/src/include/device/device.h
+++ b/src/include/device/device.h
@@ -321,16 +321,9 @@ static inline DEVTREE_CONST void *config_of(const struct device *dev)
 	devtree_die();
 }
 
-static inline DEVTREE_CONST void *config_of_path(pci_devfn_t devfn)
+static inline DEVTREE_CONST void *config_of_soc(void)
 {
-	const struct device *dev = pcidev_path_on_root(devfn);
-	if (dev)
-		return config_of(dev);
-
-	devtree_bug(__func__, devfn);
-
-	dev = dev_find_slot(0, devfn);
-	return config_of(dev);
+	return config_of(pcidev_on_root(0, 0));
 }
 
 void scan_smbus(struct device *bus);
diff --git a/src/mainboard/google/fizz/mainboard.c b/src/mainboard/google/fizz/mainboard.c
index 6b3423b886..89e692741e 100644
--- a/src/mainboard/google/fizz/mainboard.c
+++ b/src/mainboard/google/fizz/mainboard.c
@@ -221,7 +221,7 @@ static unsigned long mainboard_write_acpi_tables(
 
 static void mainboard_enable(struct device *dev)
 {
-	config_t *conf = config_of_path(SA_DEVFN_ROOT);
+	config_t *conf = config_of_soc();
 
 	mainboard_set_power_limits(conf);
 
diff --git a/src/mainboard/google/hatch/variants/akemi/variant.c b/src/mainboard/google/hatch/variants/akemi/variant.c
index 0717e810ce..c648a527f5 100644
--- a/src/mainboard/google/hatch/variants/akemi/variant.c
+++ b/src/mainboard/google/hatch/variants/akemi/variant.c
@@ -23,7 +23,7 @@ void variant_devtree_update(void)
 	uint32_t sku_id;
 	struct device *emmc_host;
 	struct device *ssd_host;
-	config_t *cfg = config_of_path(SA_DEVFN_ROOT);
+	config_t *cfg = config_of_soc();
 	emmc_host = pcidev_path_on_root(PCH_DEVFN_EMMC);
 	ssd_host = pcidev_path_on_root(PCH_DEVFN_SATA);
 
diff --git a/src/mainboard/google/hatch/variants/kindred/variant.c b/src/mainboard/google/hatch/variants/kindred/variant.c
index 6cd017bf60..1e1d083c25 100644
--- a/src/mainboard/google/hatch/variants/kindred/variant.c
+++ b/src/mainboard/google/hatch/variants/kindred/variant.c
@@ -23,7 +23,7 @@ void variant_devtree_update(void)
 	uint32_t sku_id;
 	struct device *emmc_host;
 	struct device *ssd_host;
-	config_t *cfg = config_of_path(SA_DEVFN_ROOT);
+	config_t *cfg = config_of_soc();
 	emmc_host = pcidev_path_on_root(PCH_DEVFN_EMMC);
 	ssd_host = pcidev_path_on_root(PCH_DEVFN_SATA);
 
diff --git a/src/mainboard/google/poppy/variants/atlas/mainboard.c b/src/mainboard/google/poppy/variants/atlas/mainboard.c
index 9c4b2bc75d..e1538c67b6 100644
--- a/src/mainboard/google/poppy/variants/atlas/mainboard.c
+++ b/src/mainboard/google/poppy/variants/atlas/mainboard.c
@@ -39,7 +39,7 @@ static uint32_t get_pl2(void)
 /* Override dev tree settings per board */
 void variant_devtree_update(void)
 {
-	config_t *cfg = config_of_path(SA_DEVFN_ROOT);
+	config_t *cfg = config_of_soc();
 
 	/* Update PL2 based on CPU */
 	cfg->tdp_pl2_override = get_pl2();
diff --git a/src/mainboard/google/poppy/variants/nami/mainboard.c b/src/mainboard/google/poppy/variants/nami/mainboard.c
index e48a952022..e3855bd794 100644
--- a/src/mainboard/google/poppy/variants/nami/mainboard.c
+++ b/src/mainboard/google/poppy/variants/nami/mainboard.c
@@ -241,7 +241,7 @@ void variant_devtree_update(void)
 	uint8_t pl2_id = PL2_ID_DEFAULT;
 	struct device *spi_fpmcu = PCH_DEV_GSPI1;
 
-	config_t *cfg = config_of_path(SA_DEVFN_ROOT);
+	config_t *cfg = config_of_soc();
 
 	switch (sku_id) {
 	case SKU_0_SONA:
diff --git a/src/mainboard/google/poppy/variants/nautilus/mainboard.c b/src/mainboard/google/poppy/variants/nautilus/mainboard.c
index 9aa6b724dd..b78ec82aeb 100644
--- a/src/mainboard/google/poppy/variants/nautilus/mainboard.c
+++ b/src/mainboard/google/poppy/variants/nautilus/mainboard.c
@@ -44,7 +44,7 @@ void variant_devtree_update(void)
 	uint16_t abase;
 	uint32_t val32;
 
-	config_t *cfg = config_of_path(SA_DEVFN_ROOT);
+	config_t *cfg = config_of_soc();
 
 	switch (sku_id) {
 	case SKU_0_NAUTILUS:
diff --git a/src/mainboard/google/poppy/variants/nocturne/mainboard.c b/src/mainboard/google/poppy/variants/nocturne/mainboard.c
index 7b6b28b0ba..3743cf70b1 100644
--- a/src/mainboard/google/poppy/variants/nocturne/mainboard.c
+++ b/src/mainboard/google/poppy/variants/nocturne/mainboard.c
@@ -40,7 +40,7 @@ static uint32_t get_pl2(void)
 /* Override dev tree settings per board */
 void variant_devtree_update(void)
 {
-	config_t *cfg = config_of_path(SA_DEVFN_ROOT);
+	config_t *cfg = config_of_soc();
 
 	/* Update PL2 based on CPU */
 	cfg->tdp_pl2_override = get_pl2();
diff --git a/src/soc/intel/apollolake/acpi.c b/src/soc/intel/apollolake/acpi.c
index f729f3139e..7163884365 100644
--- a/src/soc/intel/apollolake/acpi.c
+++ b/src/soc/intel/apollolake/acpi.c
@@ -90,7 +90,7 @@ acpi_cstate_t *soc_get_cstate_map(size_t *entries)
 void acpi_create_gnvs(struct global_nvs_t *gnvs)
 {
 	struct soc_intel_apollolake_config *cfg;
-	cfg = config_of_path(SA_DEVFN_ROOT);
+	cfg = config_of_soc();
 
 	/* Clear out GNVS. */
 	memset(gnvs, 0, sizeof(*gnvs));
@@ -152,7 +152,7 @@ int soc_madt_sci_irq_polarity(int sci)
 void soc_fill_fadt(acpi_fadt_t *fadt)
 {
 	const struct soc_intel_apollolake_config *cfg;
-	cfg = config_of_path(SA_DEVFN_ROOT);
+	cfg = config_of_soc();
 
 	fadt->pm_tmr_blk = ACPI_BASE_ADDRESS + PM1_TMR;
 
diff --git a/src/soc/intel/apollolake/chip.c b/src/soc/intel/apollolake/chip.c
index b7159efaec..8e516f8a84 100644
--- a/src/soc/intel/apollolake/chip.c
+++ b/src/soc/intel/apollolake/chip.c
@@ -300,7 +300,7 @@ static void set_power_limits(void)
 	uint32_t tdp, min_power, max_power;
 	uint32_t pl2_val;
 
-	cfg = config_of_path(SA_DEVFN_ROOT);
+	cfg = config_of_soc();
 
 	if (CONFIG(APL_SKIP_SET_POWER_LIMITS)) {
 		printk(BIOS_INFO, "Skip the RAPL settings.\n");
@@ -364,7 +364,7 @@ static void set_sci_irq(void)
 	struct soc_intel_apollolake_config *cfg;
 	uint32_t scis;
 
-	cfg = config_of_path(SA_DEVFN_ROOT);
+	cfg = config_of_soc();
 
 	/* Change only if a device tree entry exists. */
 	if (cfg->sci_irq) {
diff --git a/src/soc/intel/apollolake/cpu.c b/src/soc/intel/apollolake/cpu.c
index 3f06026336..33496273d2 100644
--- a/src/soc/intel/apollolake/cpu.c
+++ b/src/soc/intel/apollolake/cpu.c
@@ -296,7 +296,7 @@ void cpu_lock_sgx_memory(void)
 
 int soc_fill_sgx_param(struct sgx_param *sgx_param)
 {
-	config_t *conf = config_of_path(SA_DEVFN_ROOT);
+	config_t *conf = config_of_soc();
 
 	sgx_param->enable = conf->sgx_enable;
 	return 0;
diff --git a/src/soc/intel/apollolake/memmap.c b/src/soc/intel/apollolake/memmap.c
index 905fa64571..77711ebf26 100644
--- a/src/soc/intel/apollolake/memmap.c
+++ b/src/soc/intel/apollolake/memmap.c
@@ -35,7 +35,7 @@ void *cbmem_top(void)
 	if (!CONFIG(SOC_INTEL_GLK))
 		return tolum;
 
-	config = config_of_path(PCH_DEVFN_LPC);
+	config = config_of_soc();
 
 	/* FSP allocates 2x PRMRR Size Memory for alignment */
 	if (config->sgx_enable)
diff --git a/src/soc/intel/apollolake/pmutil.c b/src/soc/intel/apollolake/pmutil.c
index 84b61da6b1..23e9732e91 100644
--- a/src/soc/intel/apollolake/pmutil.c
+++ b/src/soc/intel/apollolake/pmutil.c
@@ -148,7 +148,7 @@ void soc_get_gpi_gpe_configs(uint8_t *dw0, uint8_t *dw1, uint8_t *dw2)
 {
 	DEVTREE_CONST struct soc_intel_apollolake_config *config;
 
-	config = config_of_path(SA_DEVFN_ROOT);
+	config = config_of_soc();
 
 	/* Assign to out variable */
 	*dw0 = config->gpe0_dw1;
diff --git a/src/soc/intel/apollolake/pnpconfig.c b/src/soc/intel/apollolake/pnpconfig.c
index 0e9e93118a..274f630a71 100644
--- a/src/soc/intel/apollolake/pnpconfig.c
+++ b/src/soc/intel/apollolake/pnpconfig.c
@@ -39,7 +39,7 @@ static void pnp_settings(void *unused)
 	const struct pnpconfig *pnpconfigarr;
 	struct soc_intel_apollolake_config *config;
 
-	config = config_of_path(SA_DEVFN_ROOT);
+	config = config_of_soc();
 
 	switch (config->pnp_settings) {
 	case PNP_PERF:
diff --git a/src/soc/intel/apollolake/romstage.c b/src/soc/intel/apollolake/romstage.c
index 29498656dc..8418919bd2 100644
--- a/src/soc/intel/apollolake/romstage.c
+++ b/src/soc/intel/apollolake/romstage.c
@@ -95,7 +95,7 @@ static void soc_early_romstage_init(void)
 static void configure_thermal_target(void)
 {
 	msr_t msr;
-	const config_t *conf = config_of_path(SA_DEVFN_ROOT);
+	const config_t *conf = config_of_soc();
 
 	if (!conf->tcc_offset)
 		return;
@@ -269,7 +269,7 @@ static void soc_memory_init_params(FSPM_UPD *mupd)
 	/* Only for GLK */
 	FSP_M_CONFIG *m_cfg = &mupd->FspmConfig;
 
-	const config_t *config = config_of_path(PCH_DEVFN_LPC);
+	const config_t *config = config_of_soc();
 
 	m_cfg->PrmrrSize = config->PrmrrSize;
 
diff --git a/src/soc/intel/broadwell/acpi.c b/src/soc/intel/broadwell/acpi.c
index 705bc0089e..7acde68db1 100644
--- a/src/soc/intel/broadwell/acpi.c
+++ b/src/soc/intel/broadwell/acpi.c
@@ -390,7 +390,7 @@ static void generate_C_state_entries(void)
 	int *set;
 	int i;
 
-	config_t *config = config_of_path(SA_DEVFN_ROOT);
+	config_t *config = config_of_soc();
 
 	if (config->s0ix_enable)
 		set = cstate_set_s0ix;
diff --git a/src/soc/intel/broadwell/cpu.c b/src/soc/intel/broadwell/cpu.c
index 54a695eec1..8fe66dce5b 100644
--- a/src/soc/intel/broadwell/cpu.c
+++ b/src/soc/intel/broadwell/cpu.c
@@ -196,7 +196,7 @@ static int pcode_mailbox_write(u32 command, u32 data)
 
 static void initialize_vr_config(void)
 {
-	config_t *conf = config_of_path(SA_DEVFN_ROOT);
+	config_t *conf = config_of_soc();
 	msr_t msr;
 
 	printk(BIOS_DEBUG, "Initializing VR config.\n");
@@ -450,7 +450,7 @@ static void configure_c_states(void)
 
 static void configure_thermal_target(void)
 {
-	config_t *conf = config_of_path(SA_DEVFN_ROOT);
+	config_t *conf = config_of_soc();
 	msr_t msr;
 
 
diff --git a/src/soc/intel/broadwell/romstage/pch.c b/src/soc/intel/broadwell/romstage/pch.c
index 0bd4ccd471..af8ea53dea 100644
--- a/src/soc/intel/broadwell/romstage/pch.c
+++ b/src/soc/intel/broadwell/romstage/pch.c
@@ -78,7 +78,7 @@ static void pch_enable_lpc(void)
 	/* Lookup device tree in romstage */
 	const config_t *config;
 
-	config = config_of_path(PCH_DEVFN_LPC);
+	config = config_of_soc();
 
 	pci_write_config32(PCH_DEV_LPC, LPC_GEN1_DEC, config->gen1_dec);
 	pci_write_config32(PCH_DEV_LPC, LPC_GEN2_DEC, config->gen2_dec);
diff --git a/src/soc/intel/cannonlake/acpi.c b/src/soc/intel/cannonlake/acpi.c
index 89770c0586..6846594ebf 100644
--- a/src/soc/intel/cannonlake/acpi.c
+++ b/src/soc/intel/cannonlake/acpi.c
@@ -145,7 +145,7 @@ acpi_cstate_t *soc_get_cstate_map(size_t *entries)
 	int *set;
 	int i;
 
-	config_t *config = config_of_path(SA_DEVFN_ROOT);
+	config_t *config = config_of_soc();
 
 	int is_s0ix_enable = config->s0ix_enable;
 
@@ -166,7 +166,7 @@ acpi_cstate_t *soc_get_cstate_map(size_t *entries)
 
 void soc_power_states_generation(int core_id, int cores_per_package)
 {
-	config_t *config = config_of_path(SA_DEVFN_ROOT);
+	config_t *config = config_of_soc();
 
 	/* Generate P-state tables */
 	if (config->eist_enable)
@@ -177,7 +177,7 @@ void soc_fill_fadt(acpi_fadt_t *fadt)
 {
 	const uint16_t pmbase = ACPI_BASE_ADDRESS;
 	const struct soc_intel_cannonlake_config *config;
-	config = config_of_path(PCH_DEVFN_LPC);
+	config = config_of_soc();
 
 	if (!config->PmTimerDisabled) {
 		fadt->pm_tmr_blk = pmbase + PM1_TMR;
@@ -202,7 +202,7 @@ uint32_t soc_read_sci_irq_select(void)
 void acpi_create_gnvs(struct global_nvs_t *gnvs)
 {
 	const struct soc_intel_cannonlake_config *config;
-	config = config_of_path(PCH_DEVFN_LPC);
+	config = config_of_soc();
 
 	/* Set unknown wake source */
 	gnvs->pm1i = -1;
diff --git a/src/soc/intel/cannonlake/chip.c b/src/soc/intel/cannonlake/chip.c
index c0810fb2ea..0ce2f1aca7 100644
--- a/src/soc/intel/cannonlake/chip.c
+++ b/src/soc/intel/cannonlake/chip.c
@@ -170,7 +170,7 @@ void cnl_configure_pads(const struct pad_config *cfg, size_t num_pads)
 static void soc_fill_gpio_pm_configuration(void)
 {
 	uint8_t value[TOTAL_GPIO_COMM];
-	const config_t *config = config_of_path(SA_DEVFN_ROOT);
+	const config_t *config = config_of_soc();
 
 	if (config->gpio_override_pm)
 		memcpy(value, config->gpio_pm, sizeof(uint8_t) *
diff --git a/src/soc/intel/cannonlake/cpu.c b/src/soc/intel/cannonlake/cpu.c
index 0f4d52e790..c58b9ad693 100644
--- a/src/soc/intel/cannonlake/cpu.c
+++ b/src/soc/intel/cannonlake/cpu.c
@@ -106,7 +106,7 @@ void set_power_limits(u8 power_limit_1_time)
 	unsigned int tdp, min_power, max_power, max_time, tdp_pl2, tdp_pl1;
 	u8 power_limit_1_val;
 
-	config_t *conf = config_of_path(SA_DEVFN_ROOT);
+	config_t *conf = config_of_soc();
 
 	if (power_limit_1_time >= ARRAY_SIZE(power_limit_time_sec_to_msr))
 		power_limit_1_time = ARRAY_SIZE(power_limit_time_sec_to_msr) - 1;
@@ -234,7 +234,7 @@ static void soc_fsp_load(void)
 
 static void configure_isst(void)
 {
-	config_t *conf = config_of_path(SA_DEVFN_ROOT);
+	config_t *conf = config_of_soc();
 	msr_t msr;
 
 	if (conf->speed_shift_enable) {
@@ -259,7 +259,7 @@ static void configure_isst(void)
 
 static void configure_misc(void)
 {
-	config_t *conf = config_of_path(SA_DEVFN_ROOT);
+	config_t *conf = config_of_soc();
 	msr_t msr;
 
 	msr = rdmsr(IA32_MISC_ENABLE);
@@ -361,7 +361,7 @@ static void configure_c_states(void)
 
 static void configure_thermal_target(void)
 {
-	config_t *conf = config_of_path(SA_DEVFN_ROOT);
+	config_t *conf = config_of_soc();
 	msr_t msr;
 
 	/* Set TCC activation offset if supported */
@@ -387,7 +387,7 @@ static void enable_pm_timer_emulation(void)
 	const struct soc_intel_cannonlake_config *config;
 	msr_t msr;
 
-	config = config_of_path(SA_DEVFN_ROOT);
+	config = config_of_soc();
 
 	/* Enable PM timer emulation only if ACPI PM timer is disabled */
 	if (!config->PmTimerDisabled)
diff --git a/src/soc/intel/cannonlake/finalize.c b/src/soc/intel/cannonlake/finalize.c
index c99653b75a..115b73254e 100644
--- a/src/soc/intel/cannonlake/finalize.c
+++ b/src/soc/intel/cannonlake/finalize.c
@@ -84,7 +84,7 @@ static void pch_finalize(void)
 	 * point and hence removed from the root bus. pcidev_path_on_root thus
 	 * returns NULL for PCH_DEV_PMC device.
 	 */
-	config = config_of_path(SA_DEVFN_ROOT);
+	config = config_of_soc();
 	pmcbase = pmc_mmio_regs();
 	if (config->PmTimerDisabled) {
 		reg8 = read8(pmcbase + PCH_PWRM_ACPI_TMR_CTL);
diff --git a/src/soc/intel/cannonlake/fsp_params.c b/src/soc/intel/cannonlake/fsp_params.c
index 76d40aa624..b580620d70 100644
--- a/src/soc/intel/cannonlake/fsp_params.c
+++ b/src/soc/intel/cannonlake/fsp_params.c
@@ -99,7 +99,7 @@ static void parse_devicetree_param(const config_t *config, FSP_S_CONFIG *params)
 
 static void parse_devicetree(FSP_S_CONFIG *params)
 {
-	const config_t *config = config_of_path(SA_DEVFN_ROOT);
+	const config_t *config = config_of_soc();
 
 	parse_devicetree_param(config, params);
 }
@@ -145,7 +145,7 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd)
 	FSP_S_TEST_CONFIG *tconfig = &supd->FspsTestConfig;
 	struct device *dev;
 
-	config_t *config = config_of_path(SA_DEVFN_ROOT);
+	config_t *config = config_of_soc();
 
 	/* Parse device tree and enable/disable devices */
 	parse_devicetree(params);
diff --git a/src/soc/intel/cannonlake/pmc.c b/src/soc/intel/cannonlake/pmc.c
index b9f455ff68..c0bb9ae296 100644
--- a/src/soc/intel/cannonlake/pmc.c
+++ b/src/soc/intel/cannonlake/pmc.c
@@ -102,7 +102,7 @@ static void config_deep_sx(uint32_t deepsx_config)
 
 static void pmc_init(void *unused)
 {
-	const config_t *config = config_of_path(SA_DEVFN_ROOT);
+	const config_t *config = config_of_soc();
 
 	rtc_init();
 
diff --git a/src/soc/intel/cannonlake/pmutil.c b/src/soc/intel/cannonlake/pmutil.c
index 1626e300d8..a543861406 100644
--- a/src/soc/intel/cannonlake/pmutil.c
+++ b/src/soc/intel/cannonlake/pmutil.c
@@ -175,7 +175,7 @@ uintptr_t soc_read_pmc_base(void)
 void soc_get_gpi_gpe_configs(uint8_t *dw0, uint8_t *dw1, uint8_t *dw2)
 {
 	DEVTREE_CONST struct soc_intel_cannonlake_config *config;
-	config = config_of_path(SA_DEVFN_ROOT);
+	config = config_of_soc();
 
 	/* Assign to out variable */
 	*dw0 = config->gpe0_dw0;
diff --git a/src/soc/intel/cannonlake/smihandler.c b/src/soc/intel/cannonlake/smihandler.c
index b8ceec0f1d..4d0b241517 100644
--- a/src/soc/intel/cannonlake/smihandler.c
+++ b/src/soc/intel/cannonlake/smihandler.c
@@ -79,7 +79,7 @@ void smihandler_soc_at_finalize(void)
 {
 	const struct soc_intel_cannonlake_config *config;
 
-	config = config_of_path(PCH_DEVFN_CSE);
+	config = config_of_soc();
 
 	if (!config->HeciEnabled && CONFIG(HECI_DISABLE_USING_SMM))
 		pch_disable_heci();
diff --git a/src/soc/intel/common/block/chip/chip.c b/src/soc/intel/common/block/chip/chip.c
index 9e74803e1a..5ab8f6b07d 100644
--- a/src/soc/intel/common/block/chip/chip.c
+++ b/src/soc/intel/common/block/chip/chip.c
@@ -22,7 +22,7 @@ const struct soc_intel_common_config *chip_get_common_soc_structure(void)
 	const struct soc_intel_common_config *soc_config;
 	const config_t *config;
 
-	config = config_of_path(SA_DEVFN_ROOT);
+	config = config_of_soc();
 	soc_config = &config->common_soc_config;
 
 	return soc_config;
diff --git a/src/soc/intel/fsp_broadwell_de/iou_complto.c b/src/soc/intel/fsp_broadwell_de/iou_complto.c
index f998d97547..b092f53875 100644
--- a/src/soc/intel/fsp_broadwell_de/iou_complto.c
+++ b/src/soc/intel/fsp_broadwell_de/iou_complto.c
@@ -24,7 +24,7 @@
 static void iou_init(struct device *dev)
 {
 	/* Use config from device always present in static devicetree. */
-	const config_t *config = config_of_path(SOC_DEV_FUNC);
+	const config_t *config = config_of_soc();
 	u16 devctl2;
 
 	/* pcie completion timeout
diff --git a/src/soc/intel/icelake/acpi.c b/src/soc/intel/icelake/acpi.c
index c61d877d1c..4089679d1c 100644
--- a/src/soc/intel/icelake/acpi.c
+++ b/src/soc/intel/icelake/acpi.c
@@ -138,7 +138,7 @@ acpi_cstate_t *soc_get_cstate_map(size_t *entries)
 	int *set;
 	int i;
 
-	config_t *config = config_of_path(SA_DEVFN_ROOT);
+	config_t *config = config_of_soc();
 
 	int is_s0ix_enable = config->s0ix_enable;
 
@@ -159,7 +159,7 @@ acpi_cstate_t *soc_get_cstate_map(size_t *entries)
 
 void soc_power_states_generation(int core_id, int cores_per_package)
 {
-	config_t *config = config_of_path(SA_DEVFN_ROOT);
+	config_t *config = config_of_soc();
 
 	if (config->eist_enable)
 		/* Generate P-state tables */
@@ -170,7 +170,7 @@ void soc_fill_fadt(acpi_fadt_t *fadt)
 {
 	const uint16_t pmbase = ACPI_BASE_ADDRESS;
 
-	config_t *config = config_of_path(SA_DEVFN_ROOT);
+	config_t *config = config_of_soc();
 
 	if (!config->PmTimerDisabled) {
 		fadt->pm_tmr_blk = pmbase + PM1_TMR;
@@ -194,7 +194,7 @@ uint32_t soc_read_sci_irq_select(void)
 
 void acpi_create_gnvs(struct global_nvs_t *gnvs)
 {
-	config_t *config = config_of_path(SA_DEVFN_ROOT);
+	config_t *config = config_of_soc();
 
 	/* Set unknown wake source */
 	gnvs->pm1i = -1;
diff --git a/src/soc/intel/icelake/chip.c b/src/soc/intel/icelake/chip.c
index e71c573f98..2bb908c064 100644
--- a/src/soc/intel/icelake/chip.c
+++ b/src/soc/intel/icelake/chip.c
@@ -107,7 +107,7 @@ const char *soc_acpi_name(const struct device *dev)
 static void soc_fill_gpio_pm_configuration(void)
 {
 	uint8_t value[TOTAL_GPIO_COMM];
-	const config_t *config = config_of_path(SA_DEVFN_ROOT);
+	const config_t *config = config_of_soc();
 
 	if (config->gpio_override_pm)
 		memcpy(value, config->gpio_pm, sizeof(uint8_t) *
diff --git a/src/soc/intel/icelake/cpu.c b/src/soc/intel/icelake/cpu.c
index 8a65ccf5d3..0ecccb94e5 100644
--- a/src/soc/intel/icelake/cpu.c
+++ b/src/soc/intel/icelake/cpu.c
@@ -40,7 +40,7 @@ static void soc_fsp_load(void)
 
 static void configure_isst(void)
 {
-	config_t *conf = config_of_path(SA_DEVFN_ROOT);
+	config_t *conf = config_of_soc();
 	msr_t msr;
 
 	if (conf->speed_shift_enable) {
@@ -67,7 +67,7 @@ static void configure_misc(void)
 {
 	msr_t msr;
 
-	config_t *conf = config_of_path(SA_DEVFN_ROOT);
+	config_t *conf = config_of_soc();
 
 	msr = rdmsr(IA32_MISC_ENABLE);
 	msr.lo |= (1 << 0);	/* Fast String enable */
diff --git a/src/soc/intel/icelake/finalize.c b/src/soc/intel/icelake/finalize.c
index 086787d9df..a70b5a1ed4 100644
--- a/src/soc/intel/icelake/finalize.c
+++ b/src/soc/intel/icelake/finalize.c
@@ -83,7 +83,7 @@ static void pch_finalize(void)
 	 * point and hence removed from the root bus. pcidev_path_on_root thus
 	 * returns NULL for PCH_DEV_PMC device.
 	 */
-	config = config_of_path(SA_DEVFN_ROOT);
+	config = config_of_soc();
 	pmcbase = pmc_mmio_regs();
 	if (config->PmTimerDisabled) {
 		reg8 = read8(pmcbase + PCH_PWRM_ACPI_TMR_CTL);
diff --git a/src/soc/intel/icelake/fsp_params.c b/src/soc/intel/icelake/fsp_params.c
index e31e47bf57..8819e7d033 100644
--- a/src/soc/intel/icelake/fsp_params.c
+++ b/src/soc/intel/icelake/fsp_params.c
@@ -31,7 +31,7 @@
 static void parse_devicetree(FSP_S_CONFIG *params)
 {
 	const struct soc_intel_icelake_config *config;
-	config = config_of_path(SA_DEVFN_ROOT);
+	config = config_of_soc();
 
 	for (int i = 0; i < CONFIG_SOC_INTEL_I2C_DEV_MAX; i++)
 		params->SerialIoI2cMode[i] = config->SerialIoI2cMode[i];
@@ -69,7 +69,7 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd)
 
 	struct device *dev;
 	struct soc_intel_icelake_config *config;
-	config = config_of_path(SA_DEVFN_ROOT);
+	config = config_of_soc();
 
 	/* Parse device tree and enable/disable devices */
 	parse_devicetree(params);
diff --git a/src/soc/intel/icelake/pmc.c b/src/soc/intel/icelake/pmc.c
index 28fc01d029..6348d28b25 100644
--- a/src/soc/intel/icelake/pmc.c
+++ b/src/soc/intel/icelake/pmc.c
@@ -84,7 +84,7 @@ static void config_deep_sx(uint32_t deepsx_config)
 
 static void pmc_init(void *unused)
 {
-	const config_t *config = config_of_path(SA_DEVFN_ROOT);
+	const config_t *config = config_of_soc();
 
 	rtc_init();
 
diff --git a/src/soc/intel/icelake/pmutil.c b/src/soc/intel/icelake/pmutil.c
index a70840b527..c20da5018a 100644
--- a/src/soc/intel/icelake/pmutil.c
+++ b/src/soc/intel/icelake/pmutil.c
@@ -174,7 +174,7 @@ void soc_get_gpi_gpe_configs(uint8_t *dw0, uint8_t *dw1, uint8_t *dw2)
 {
 	DEVTREE_CONST struct soc_intel_icelake_config *config;
 
-	config = config_of_path(SA_DEVFN_ROOT);
+	config = config_of_soc();
 
 	/* Assign to out variable */
 	*dw0 = config->gpe0_dw0;
diff --git a/src/soc/intel/icelake/romstage/fsp_params.c b/src/soc/intel/icelake/romstage/fsp_params.c
index a78c8a49cf..5bf34213f0 100644
--- a/src/soc/intel/icelake/romstage/fsp_params.c
+++ b/src/soc/intel/icelake/romstage/fsp_params.c
@@ -79,7 +79,7 @@ void platform_fsp_memory_init_params_cb(FSPM_UPD *mupd, uint32_t version)
 	const struct soc_intel_icelake_config *config;
 	FSP_M_CONFIG *m_cfg = &mupd->FspmConfig;
 
-	config = config_of_path(SA_DEVFN_ROOT);
+	config = config_of_soc();
 
 	soc_memory_init_params(m_cfg, config);
 
diff --git a/src/soc/intel/icelake/smihandler.c b/src/soc/intel/icelake/smihandler.c
index 8db2c3bbb4..b7c37d4aa7 100644
--- a/src/soc/intel/icelake/smihandler.c
+++ b/src/soc/intel/icelake/smihandler.c
@@ -76,7 +76,7 @@ void smihandler_soc_at_finalize(void)
 {
 	const struct soc_intel_icelake_config *config;
 
-	config = config_of_path(PCH_DEVFN_CSE);
+	config = config_of_soc();
 
 	if (!config->HeciEnabled && CONFIG(HECI_DISABLE_USING_SMM))
 		pch_disable_heci();
diff --git a/src/soc/intel/quark/romstage/fsp2_0.c b/src/soc/intel/quark/romstage/fsp2_0.c
index a64fed4868..cd654d74de 100644
--- a/src/soc/intel/quark/romstage/fsp2_0.c
+++ b/src/soc/intel/quark/romstage/fsp2_0.c
@@ -93,7 +93,7 @@ void platform_fsp_memory_init_params_cb(FSPM_UPD *fspm_upd, uint32_t version)
 			"Microcode file (rmu.bin) not found.");
 
 	/* Locate the configuration data from devicetree.cb */
-	config = config_of_path(LPC_DEV_FUNC);
+	config = config_of_soc();
 
 	/* Update the architectural UPD values. */
 	aupd = &fspm_upd->FspmArchUpd;
diff --git a/src/soc/intel/skylake/acpi.c b/src/soc/intel/skylake/acpi.c
index d67b502ac8..de37341a08 100644
--- a/src/soc/intel/skylake/acpi.c
+++ b/src/soc/intel/skylake/acpi.c
@@ -172,7 +172,7 @@ static int get_cores_per_package(void)
 
 static void acpi_create_gnvs(global_nvs_t *gnvs)
 {
-	const struct soc_intel_skylake_config *config = config_of_path(PCH_DEVFN_LPC);
+	const struct soc_intel_skylake_config *config = config_of_soc();
 
 	/* Set unknown wake source */
 	gnvs->pm1i = -1;
@@ -232,7 +232,7 @@ unsigned long acpi_fill_madt(unsigned long current)
 void acpi_fill_fadt(acpi_fadt_t *fadt)
 {
 	const uint16_t pmbase = ACPI_BASE_ADDRESS;
-	config_t *config = config_of_path(SA_DEVFN_ROOT);
+	config_t *config = config_of_soc();
 
 	/* Use ACPI 3.0 revision */
 	fadt->header.revision = get_acpi_table_revision(FADT);
@@ -503,7 +503,7 @@ void generate_cpu_entries(struct device *device)
 	int totalcores = dev_count_cpu();
 	int cores_per_package = get_cores_per_package();
 	int numcpus = totalcores/cores_per_package;
-	config_t *config = config_of_path(SA_DEVFN_ROOT);
+	config_t *config = config_of_soc();
 	int is_s0ix_enable = config->s0ix_enable;
 
 	printk(BIOS_DEBUG, "Found %d CPU(s) with %d core(s) each.\n",
@@ -674,7 +674,7 @@ void southbridge_inject_dsdt(struct device *device)
 /* Save wake source information for calculating ACPI _SWS values */
 int soc_fill_acpi_wake(uint32_t *pm1, uint32_t **gpe0)
 {
-	const struct soc_intel_skylake_config *config = config_of_path(PCH_DEVFN_LPC);
+	const struct soc_intel_skylake_config *config = config_of_soc();
 	struct chipset_power_state *ps;
 	static uint32_t gpe0_sts[GPE0_REG_MAX];
 	uint32_t pm1_en;
diff --git a/src/soc/intel/skylake/chip_fsp20.c b/src/soc/intel/skylake/chip_fsp20.c
index 462285c2a0..55fedd3cf5 100644
--- a/src/soc/intel/skylake/chip_fsp20.c
+++ b/src/soc/intel/skylake/chip_fsp20.c
@@ -237,7 +237,7 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd)
 	uintptr_t vbt_data = (uintptr_t)vbt_get();
 	int i;
 
-	config = config_of_path(SA_DEVFN_ROOT);
+	config = config_of_soc();
 
 	mainboard_silicon_init_params(params);
 	/* Set PsysPmax if it is available from DT */
diff --git a/src/soc/intel/skylake/cpu.c b/src/soc/intel/skylake/cpu.c
index 0d49d28d3d..5424c91c58 100644
--- a/src/soc/intel/skylake/cpu.c
+++ b/src/soc/intel/skylake/cpu.c
@@ -117,7 +117,7 @@ void set_power_limits(u8 power_limit_1_time)
 	unsigned int tdp, min_power, max_power, max_time, tdp_pl2, tdp_pl1;
 	u8 power_limit_1_val;
 
-	config_t *conf = config_of_path(SA_DEVFN_ROOT);
+	config_t *conf = config_of_soc();
 
 	if (power_limit_1_time >= ARRAY_SIZE(power_limit_time_sec_to_msr))
 		power_limit_1_time = ARRAY_SIZE(power_limit_time_sec_to_msr) - 1;
@@ -240,7 +240,7 @@ void set_power_limits(u8 power_limit_1_time)
 
 static void configure_thermal_target(void)
 {
-	config_t *conf = config_of_path(SA_DEVFN_ROOT);
+	config_t *conf = config_of_soc();
 	msr_t msr;
 
 
@@ -260,7 +260,7 @@ static void configure_thermal_target(void)
 
 static void configure_isst(void)
 {
-	config_t *conf = config_of_path(SA_DEVFN_ROOT);
+	config_t *conf = config_of_soc();
 	msr_t msr;
 
 
@@ -286,7 +286,7 @@ static void configure_isst(void)
 
 static void configure_misc(void)
 {
-	config_t *conf = config_of_path(SA_DEVFN_ROOT);
+	config_t *conf = config_of_soc();
 	msr_t msr;
 
 
@@ -562,7 +562,7 @@ void cpu_lock_sgx_memory(void)
 
 int soc_fill_sgx_param(struct sgx_param *sgx_param)
 {
-	config_t *conf = config_of_path(SA_DEVFN_ROOT);
+	config_t *conf = config_of_soc();
 
 	sgx_param->enable = conf->sgx_enable;
 	return 0;
diff --git a/src/soc/intel/skylake/pmc.c b/src/soc/intel/skylake/pmc.c
index ffe060518e..ab9297fe92 100644
--- a/src/soc/intel/skylake/pmc.c
+++ b/src/soc/intel/skylake/pmc.c
@@ -188,7 +188,7 @@ BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_LOAD, BS_ON_EXIT, pm1_enable_pwrbtn_smi, NULL);
  */
 static void pm1_handle_wake_pin(void *unused)
 {
-	const config_t *conf = config_of_path(SA_DEVFN_ROOT);
+	const config_t *conf = config_of_soc();
 
 	/* If WAKE# pin is enabled, bail out early. */
 	if (conf->deep_sx_config & DSX_EN_WAKE_PIN)
diff --git a/src/soc/intel/skylake/pmutil.c b/src/soc/intel/skylake/pmutil.c
index 90f1b038e0..329cea9621 100644
--- a/src/soc/intel/skylake/pmutil.c
+++ b/src/soc/intel/skylake/pmutil.c
@@ -177,7 +177,7 @@ void soc_get_gpi_gpe_configs(uint8_t *dw0, uint8_t *dw1, uint8_t *dw2)
 {
 	DEVTREE_CONST struct soc_intel_skylake_config *config;
 
-	config = config_of_path(PCH_DEVFN_PMC);
+	config = config_of_soc();
 
 	/* Assign to out variable */
 	*dw0 = config->gpe0_dw0;
diff --git a/src/soc/intel/skylake/romstage/romstage.c b/src/soc/intel/skylake/romstage/romstage.c
index a8bbfb633d..f354af3442 100644
--- a/src/soc/intel/skylake/romstage/romstage.c
+++ b/src/soc/intel/skylake/romstage/romstage.c
@@ -43,7 +43,7 @@ void soc_pre_ram_init(struct romstage_params *params)
 	/* Program MCHBAR and DMIBAR */
 	systemagent_early_init();
 
-	config = config_of_path(PCH_DEVFN_LPC);
+	config = config_of_soc();
 
 	/* Force a full memory train if RMT is enabled */
 	params->disable_saved_data = config->Rmt;
@@ -57,7 +57,7 @@ void soc_memory_init_params(struct romstage_params *params,
 
 	/* Set the parameters for MemoryInit */
 
-	config = config_of_path(PCH_DEVFN_LPC);
+	config = config_of_soc();
 
 	/*
 	 * Set IGD stolen size to 64MB.  The FBC hardware for skylake does not
diff --git a/src/soc/intel/skylake/romstage/romstage_fsp20.c b/src/soc/intel/skylake/romstage/romstage_fsp20.c
index deda53312c..af89441194 100644
--- a/src/soc/intel/skylake/romstage/romstage_fsp20.c
+++ b/src/soc/intel/skylake/romstage/romstage_fsp20.c
@@ -289,7 +289,7 @@ void platform_fsp_memory_init_params_cb(FSPM_UPD *mupd, uint32_t version)
 	FSP_M_CONFIG *m_cfg = &mupd->FspmConfig;
 	FSP_M_TEST_CONFIG *m_t_cfg = &mupd->FspmTestConfig;
 
-	config = config_of_path(PCH_DEVFN_LPC);
+	config = config_of_soc();
 
 	soc_memory_init_params(m_cfg, config);
 	soc_peg_init_params(m_cfg, m_t_cfg, config);
diff --git a/src/soc/intel/skylake/romstage/systemagent.c b/src/soc/intel/skylake/romstage/systemagent.c
index 9b7ea2470e..bf0d5064e4 100644
--- a/src/soc/intel/skylake/romstage/systemagent.c
+++ b/src/soc/intel/skylake/romstage/systemagent.c
@@ -29,7 +29,7 @@ static void systemagent_vtd_init(void)
 	const struct device *const igd_dev = pcidev_path_on_root(SA_DEVFN_IGD);
 	const struct soc_intel_skylake_config *config = NULL;
 
-	config = config_of_path(SA_DEVFN_ROOT);
+	config = config_of_soc();
 	if (config->ignore_vtd)
 		return;