Drop explicit NULL initializations from device_operations

Unmentioned fields are initialized with 0 (or NULL) implicitly. Beside
that, the struct has grown over the years. There are too many optional
fields to list them all.

Change-Id: Icb9e14c58153d7c14817bcde148e86e977666e4b
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40126
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/picasso/northbridge.c

@@ -205,8 +205,6 @@ static struct device_operations northbridge_operations = {
 	.enable_resources = pci_dev_enable_resources,
 	.acpi_fill_ssdt   = northbridge_fill_ssdt_generator,
 	.write_acpi_tables = agesa_write_acpi_tables,
-	.enable		  = 0,
-	.ops_pci	  = 0,
 };
 
 static const struct pci_driver family15_northbridge __pci_driver = {

src/soc/amd/stoneyridge/northbridge.c

@@ -358,8 +358,6 @@ static struct device_operations northbridge_operations = {
 	.init		  = northbridge_init,
 	.acpi_fill_ssdt   = northbridge_fill_ssdt_generator,
 	.write_acpi_tables = agesa_write_acpi_tables,
-	.enable		  = 0,
-	.ops_pci	  = 0,
 };
 
 static const unsigned short pci_device_ids[] = {

src/soc/cavium/cn81xx/ecam0.c

@@ -320,8 +320,6 @@ static void ecam0_init(struct device *dev)
 }
 
 struct device_operations pci_domain_ops_ecam0 = {
-	.set_resources    = NULL,
-	.enable_resources = NULL,
 	.read_resources   = ecam0_read_resources,
 	.init             = ecam0_init,
 	.scan_bus         = pci_domain_scan_bus,

src/soc/cavium/cn81xx/soc.c

@@ -394,7 +394,6 @@ static struct device_operations soc_ops = {
 	.enable_resources = DEVICE_NOOP,
 	.init             = soc_init,
 	.final            = soc_final,
-	.scan_bus         = NULL,
 };
 
 static void enable_soc_dev(struct device *dev)

src/soc/intel/apollolake/chip.c

@@ -214,8 +214,6 @@ static void pci_domain_set_resources(struct device *dev)
 static struct device_operations pci_domain_ops = {
 	.read_resources = pci_domain_read_resources,
 	.set_resources = pci_domain_set_resources,
-	.enable_resources = NULL,
-	.init = NULL,
 	.scan_bus = pci_domain_scan_bus,
 	.acpi_name = &soc_acpi_name,
 };
@@ -225,7 +223,6 @@ static struct device_operations cpu_bus_ops = {
 	.set_resources = DEVICE_NOOP,
 	.enable_resources = DEVICE_NOOP,
 	.init = apollolake_init_cpus,
-	.scan_bus = NULL,
 	.acpi_fill_ssdt = generate_cpu_entries,
 };
 

src/soc/intel/baytrail/chip.c

@@ -28,8 +28,6 @@ static void pci_domain_set_resources(struct device *dev)
 static struct device_operations pci_domain_ops = {
 	.read_resources   = pci_domain_read_resources,
 	.set_resources    = pci_domain_set_resources,
-	.enable_resources = NULL,
-	.init             = NULL,
 	.scan_bus         = pci_domain_scan_bus,
 };
 
@@ -38,7 +36,6 @@ static struct device_operations cpu_bus_ops = {
 	.set_resources    = DEVICE_NOOP,
 	.enable_resources = DEVICE_NOOP,
 	.init             = baytrail_init_cpus,
-	.scan_bus         = NULL,
 };
 
 

src/soc/intel/baytrail/emmc.c

@@ -59,8 +59,6 @@ static struct device_operations device_ops = {
 	.set_resources		= pci_dev_set_resources,
 	.enable_resources	= pci_dev_enable_resources,
 	.init			= emmc_init,
-	.enable			= NULL,
-	.scan_bus		= NULL,
 	.ops_pci		= &soc_pci_ops,
 };
 

src/soc/intel/baytrail/hda.c

@@ -100,8 +100,6 @@ static const struct device_operations device_ops = {
 	.set_resources		= pci_dev_set_resources,
 	.enable_resources	= pci_dev_enable_resources,
 	.init			= hda_init,
-	.enable			= NULL,
-	.scan_bus		= NULL,
 	.ops_pci		= &soc_pci_ops,
 };
 

src/soc/intel/baytrail/lpe.c

@@ -173,8 +173,6 @@ static const struct device_operations device_ops = {
 	.set_resources		= pci_dev_set_resources,
 	.enable_resources	= pci_dev_enable_resources,
 	.init			= lpe_init,
-	.enable			= NULL,
-	.scan_bus		= NULL,
 	.ops_pci		= &soc_pci_ops,
 };
 

src/soc/intel/baytrail/lpss.c

@@ -171,8 +171,6 @@ static struct device_operations device_ops = {
 	.set_resources		= pci_dev_set_resources,
 	.enable_resources	= pci_dev_enable_resources,
 	.init			= lpss_init,
-	.enable			= NULL,
-	.scan_bus		= NULL,
 	.ops_pci		= &soc_pci_ops,
 };
 

src/soc/intel/baytrail/northcluster.c

@@ -137,11 +137,6 @@ static void nc_read_resources(struct device *dev)
 static struct device_operations nc_ops = {
 	.read_resources   = nc_read_resources,
 	.acpi_fill_ssdt   = generate_cpu_entries,
-	.set_resources    = NULL,
-	.enable_resources = NULL,
-	.init             = NULL,
-	.enable           = NULL,
-	.scan_bus         = NULL,
 	.ops_pci          = &soc_pci_ops,
 };
 

src/soc/intel/baytrail/sata.c

@@ -212,7 +212,6 @@ static struct device_operations sata_ops = {
 	.enable_resources	= pci_dev_enable_resources,
 	.init			= sata_init,
 	.enable			= sata_enable,
-	.scan_bus		= NULL,
 	.ops_pci		= &soc_pci_ops,
 };
 

src/soc/intel/baytrail/sd.c

@@ -50,8 +50,6 @@ static const struct device_operations device_ops = {
 	.set_resources		= pci_dev_set_resources,
 	.enable_resources	= pci_dev_enable_resources,
 	.init			= sd_init,
-	.enable			= NULL,
-	.scan_bus		= NULL,
 	.ops_pci		= &soc_pci_ops,
 };
 

src/soc/intel/baytrail/southcluster.c

@@ -523,7 +523,6 @@ static struct device_operations device_ops = {
 	.set_resources		= pci_dev_set_resources,
 	.acpi_inject_dsdt	= southcluster_inject_dsdt,
 	.write_acpi_tables      = acpi_write_hpet,
-	.enable_resources	= NULL,
 	.init			= sc_init,
 	.enable			= southcluster_enable_dev,
 	.scan_bus		= scan_static_bus,

src/soc/intel/braswell/chip.c

@@ -31,8 +31,6 @@ static void pci_domain_set_resources(struct device *dev)
 static struct device_operations pci_domain_ops = {
 	.read_resources   = pci_domain_read_resources,
 	.set_resources    = pci_domain_set_resources,
-	.enable_resources = NULL,
-	.init             = NULL,
 	.scan_bus         = pci_domain_scan_bus,
 };
 

src/soc/intel/braswell/lpe.c

@@ -197,8 +197,6 @@ static const struct device_operations device_ops = {
 	.set_resources		= lpe_set_resources,
 	.enable_resources	= pci_dev_enable_resources,
 	.init			= lpe_init,
-	.enable			= NULL,
-	.scan_bus		= NULL,
 	.ops_pci		= &soc_pci_ops,
 };
 

src/soc/intel/braswell/lpss.c

@@ -162,8 +162,6 @@ static struct device_operations device_ops = {
 	.set_resources		= pci_dev_set_resources,
 	.enable_resources	= pci_dev_enable_resources,
 	.init			= lpss_init,
-	.enable			= NULL,
-	.scan_bus		= NULL,
 	.ops_pci		= &soc_pci_ops,
 };
 

src/soc/intel/braswell/southcluster.c

@@ -572,7 +572,6 @@ void southcluster_enable_dev(struct device *dev)
 static struct device_operations device_ops = {
 	.read_resources			= sc_read_resources,
 	.set_resources			= pci_dev_set_resources,
-	.enable_resources		= NULL,
 	.acpi_inject_dsdt		= southcluster_inject_dsdt,
 	.write_acpi_tables		= southcluster_write_acpi_tables,
 	.init				= sc_init,

src/soc/intel/denverton_ns/chip.c

@@ -46,7 +46,6 @@ static struct device_operations cpu_bus_ops = {
 	.set_resources = DEVICE_NOOP,
 	.enable_resources = DEVICE_NOOP,
 	.init = denverton_init_cpus,
-	.scan_bus = NULL,
 #if CONFIG(HAVE_ACPI_TABLES)
 	.acpi_fill_ssdt = generate_cpu_entries,
 #endif

src/soc/intel/denverton_ns/csme_ie_kt.c

@@ -69,8 +69,6 @@ static struct device_operations csme_ie_kt_ops = {
 	.read_resources = pci_csme_ie_kt_read_resources,
 	.set_resources = pci_dev_set_resources,
 	.enable_resources = pci_dev_enable_resources,
-	.scan_bus = 0,
-	.init = 0,
 	.ops_pci = &soc_pci_ops,
 };
 

src/soc/intel/denverton_ns/npk.c

@@ -37,7 +37,6 @@ static struct device_operations pmc_ops = {
 	.read_resources = pci_npk_read_resources,
 	.set_resources = pci_dev_set_resources,
 	.enable_resources = pci_dev_enable_resources,
-	.scan_bus = 0,
 	.init = npk_init,
 	.ops_pci = &soc_pci_ops,
 };

src/soc/intel/denverton_ns/pmc.c

@@ -104,7 +104,6 @@ static struct device_operations pmc_ops = {
 	.read_resources = pci_pmc_read_resources,
 	.set_resources = pci_dev_set_resources,
 	.enable_resources = pci_dev_enable_resources,
-	.scan_bus = 0,
 	.init = pmc_init,
 	.ops_pci = &soc_pci_ops,
 };

src/soc/intel/denverton_ns/sata.c

@@ -65,7 +65,6 @@ static struct device_operations sata_ops = {
 	.enable_resources = pci_dev_enable_resources,
 	.init = sata_init,
 	.enable = sata_enable,
-	.scan_bus = 0,
 	.ops_pci = &soc_pci_ops,
 };
 

src/soc/intel/denverton_ns/xhci.c

@@ -39,7 +39,6 @@ static struct device_operations usb_xhci_ops = {
 	.enable_resources = pci_dev_enable_resources,
 	.init = usb_xhci_init,
 	.enable = pci_dev_enable_resources,
-	.scan_bus = 0,
 	.ops_pci = &soc_pci_ops,
 };
 

src/soc/intel/xeon_sp/cpx/chip.c

@@ -35,7 +35,6 @@ static struct device_operations cpu_bus_ops = {
 	.set_resources = DEVICE_NOOP,
 	.enable_resources = DEVICE_NOOP,
 	.init = cpx_init_cpus,
-	.scan_bus = NULL,
 };
 
 static void chip_enable_dev(struct device *dev)

src/soc/intel/xeon_sp/skx/chip.c

@@ -486,7 +486,6 @@ static struct device_operations cpu_bus_ops = {
 	.set_resources = DEVICE_NOOP,
 	.enable_resources = DEVICE_NOOP,
 	.init = xeon_sp_init_cpus,
-	.scan_bus = NULL,
 #if CONFIG(HAVE_ACPI_TABLES)
 	/* defined in src/soc/intel/common/block/acpi/acpi.c */
 	.acpi_fill_ssdt = generate_cpu_entries,

src/soc/intel/xeon_sp/uncore.c

@@ -287,9 +287,6 @@ static struct device_operations mmapvtd_ops = {
 	.enable_resources  = pci_dev_enable_resources,
 	.init              = mmapvtd_init,
 	.ops_pci           = &soc_pci_ops,
-#if CONFIG(HAVE_ACPI_TABLES)
-	.acpi_inject_dsdt  = NULL,
-#endif
 };
 
 static const unsigned short mmapvtd_ids[] = {

src/soc/nvidia/tegra124/soc.c

@@ -57,7 +57,6 @@ static struct device_operations soc_ops = {
 	.set_resources    = DEVICE_NOOP,
 	.enable_resources = soc_enable,
 	.init             = soc_init,
-	.scan_bus         = 0,
 };
 
 static void enable_tegra124_dev(struct device *dev)

src/soc/nvidia/tegra210/soc.c

@@ -65,7 +65,6 @@ static struct device_operations soc_ops = {
 	.set_resources    = DEVICE_NOOP,
 	.enable_resources = DEVICE_NOOP,
 	.init             = DEVICE_NOOP,
-	.scan_bus         = NULL,
 };
 
 static void enable_tegra210_dev(struct device *dev)

src/soc/rockchip/rk3288/soc.c

@@ -38,7 +38,6 @@ static struct device_operations soc_ops = {
 	.read_resources   = DEVICE_NOOP,
 	.set_resources    = DEVICE_NOOP,
 	.init             = soc_init,
-	.scan_bus         = 0,
 };
 
 static void enable_rk3288_dev(struct device *dev)

src/soc/samsung/exynos5250/cpu.c

@@ -127,7 +127,6 @@ static struct device_operations cpu_ops = {
 	.set_resources    = DEVICE_NOOP,
 	.enable_resources = cpu_enable,
 	.init             = cpu_init,
-	.scan_bus         = 0,
 };
 
 static void enable_exynos5250_dev(struct device *dev)

src/soc/samsung/exynos5420/cpu.c

@@ -157,7 +157,6 @@ static struct device_operations cpu_ops = {
 	.set_resources    = DEVICE_NOOP,
 	.enable_resources = cpu_enable,
 	.init             = cpu_init,
-	.scan_bus         = 0,
 };
 
 static void enable_exynos5420_dev(struct device *dev)