soc/intel/apl: Hook up cpu ops in devicetree

This simplifies the code flow of the cpu init. APL can do CPU init after
calling FSP-S, while GLK needs to do that before. This is now reflected
directly in the cpu ops rather than using
CONFIG_SOC_INTEL_COMMON_BLOCK_CPU_MPINIT as a proxy.

Change-Id: I7fd1db72ca98f0a1b8fd03a979308a7c701a8a54
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72705
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/soc/intel/apollolake/chip.c

@@ -206,20 +206,24 @@ static struct device_operations pci_domain_ops = {
 	.acpi_fill_ssdt = ssdt_set_above_4g_pci,
 };
 
-static struct device_operations cpu_bus_ops = {
+struct device_operations apl_cpu_bus_ops = {
 	.read_resources = noop_read_resources,
 	.set_resources = noop_set_resources,
 	.init = apollolake_init_cpus,
 	.acpi_fill_ssdt = generate_cpu_entries,
 };
 
+struct device_operations glk_cpu_bus_ops = {
+	.read_resources = noop_read_resources,
+	.set_resources = noop_set_resources,
+	.acpi_fill_ssdt = generate_cpu_entries,
+};
+
 static void enable_dev(struct device *dev)
 {
 	/* Set the operations if it is a special bus type */
 	if (dev->path.type == DEVICE_PATH_DOMAIN)
 		dev->ops = &pci_domain_ops;
-	else if (dev->path.type == DEVICE_PATH_CPU_CLUSTER)
-		dev->ops = &cpu_bus_ops;
 	else if (dev->path.type == DEVICE_PATH_GPIO)
 		block_gpio_enable(dev);
 }

src/soc/intel/apollolake/chipset_apl.cb

@@ -1,5 +1,5 @@
 chip soc/intel/apollolake
-	device cpu_cluster 0 on end
+	device cpu_cluster 0 on ops apl_cpu_bus_ops end
 	device domain 0 on
 		device pci 00.0 alias system_agent	on	end # Host Bridge
 		device pci 00.1 alias dptf		on	end # DPTF

src/soc/intel/apollolake/chipset_glk.cb

@@ -1,5 +1,5 @@
 chip soc/intel/apollolake
-	device cpu_cluster 0 on end
+	device cpu_cluster 0 on ops glk_cpu_bus_ops end
 	device domain 0 on
 		device pci 00.0 alias system_agent	on	end # Host Bridge
 		device pci 00.1 alias dptf		on	end # DPTF

src/soc/intel/apollolake/cpu.c

@@ -271,8 +271,6 @@ void soc_init_cpus(struct bus *cpu_bus)
 
 void apollolake_init_cpus(struct device *dev)
 {
-	if (CONFIG(SOC_INTEL_COMMON_BLOCK_CPU_MPINIT))
-		return;
 	if (!dev->link_list)
 		add_more_links(dev, 1);
 	soc_init_cpus(dev->link_list);