Drop unnecessary DEVICE_NOOP entries

Providing an explicit no-op function pointer is only necessary for
`.read_resources` and `.set_resources`. All other device-operation
pointers are optional and can be NULL.

Change-Id: I3d139f7be86180558cabec04b8566873062e33be
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40206
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

77 files changed, 1 insertions, 92 deletions

diff --git a/src/device/root_device.c b/src/device/root_device.c
index 8d587dc42ee0..68a7ae668f86 100644
--- a/src/device/root_device.c
+++ b/src/device/root_device.c
@@ -129,8 +129,6 @@ static const char *root_dev_acpi_name(const struct device *dev)
 struct device_operations default_dev_ops_root = {
 	.read_resources   = DEVICE_NOOP,
 	.set_resources    = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
-	.init             = DEVICE_NOOP,
 	.scan_bus         = scan_static_bus,
 	.reset_bus        = root_dev_reset,
 #if CONFIG(HAVE_ACPI_TABLES)
diff --git a/src/drivers/generic/adau7002/adau7002.c b/src/drivers/generic/adau7002/adau7002.c
index d026ffd34472..97bd37d871c9 100644
--- a/src/drivers/generic/adau7002/adau7002.c
+++ b/src/drivers/generic/adau7002/adau7002.c
@@ -57,7 +57,6 @@ static const char *adau7002_acpi_name(const struct device *dev)
 static struct device_operations adau7002_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 #if CONFIG(HAVE_ACPI_TABLES)
 	.acpi_name		= adau7002_acpi_name,
 	.acpi_fill_ssdt		= adau7002_fill_ssdt,
diff --git a/src/drivers/generic/generic/generic.c b/src/drivers/generic/generic/generic.c
index 5666ee41579a..d4de6c7583ee 100644
--- a/src/drivers/generic/generic/generic.c
+++ b/src/drivers/generic/generic/generic.c
@@ -70,7 +70,6 @@ static const char *generic_dev_acpi_name(const struct device *dev)
 static struct device_operations generic_dev_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 	.acpi_name		= generic_dev_acpi_name,
 	.acpi_fill_ssdt		= generic_dev_fill_ssdt_generator,
 };
diff --git a/src/drivers/generic/gpio_keys/gpio_keys.c b/src/drivers/generic/gpio_keys/gpio_keys.c
index e2310a1c315a..5a74c6409bea 100644
--- a/src/drivers/generic/gpio_keys/gpio_keys.c
+++ b/src/drivers/generic/gpio_keys/gpio_keys.c
@@ -104,7 +104,6 @@ static const char *gpio_keys_acpi_name(const struct device *dev)
 static struct device_operations gpio_keys_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 	.acpi_name		= gpio_keys_acpi_name,
 	.acpi_fill_ssdt		= gpio_keys_fill_ssdt_generator,
 };
diff --git a/src/drivers/generic/gpio_regulator/gpio_regulator.c b/src/drivers/generic/gpio_regulator/gpio_regulator.c
index 253a2fa633eb..7041aa0e7c15 100644
--- a/src/drivers/generic/gpio_regulator/gpio_regulator.c
+++ b/src/drivers/generic/gpio_regulator/gpio_regulator.c
@@ -61,7 +61,6 @@ static const char *gpio_regulator_acpi_name(const struct device *dev)
 static struct device_operations gpio_regulator_ops = {
 	.read_resources = DEVICE_NOOP,
 	.set_resources = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.acpi_name = gpio_regulator_acpi_name,
 	.acpi_fill_ssdt = gpio_regulator_fill_ssdt_generator,
 };
diff --git a/src/drivers/generic/ioapic/ioapic.c b/src/drivers/generic/ioapic/ioapic.c
index b09e8a6c04d0..b2c4bb60b1ea 100644
--- a/src/drivers/generic/ioapic/ioapic.c
+++ b/src/drivers/generic/ioapic/ioapic.c
@@ -96,7 +96,6 @@ static void ioapic_read_resources(struct device *dev)
 static struct device_operations ioapic_operations = {
 	.read_resources   = ioapic_read_resources,
 	.set_resources    = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init             = ioapic_init,
 };
 
diff --git a/src/drivers/generic/max98357a/max98357a.c b/src/drivers/generic/max98357a/max98357a.c
index d1c497839887..0a293674983f 100644
--- a/src/drivers/generic/max98357a/max98357a.c
+++ b/src/drivers/generic/max98357a/max98357a.c
@@ -72,7 +72,6 @@ static const char *max98357a_acpi_name(const struct device *dev)
 static struct device_operations max98357a_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 #if CONFIG(HAVE_ACPI_TABLES)
 	.acpi_name		= max98357a_acpi_name,
 	.acpi_fill_ssdt		= max98357a_fill_ssdt,
diff --git a/src/drivers/i2c/adt7463/adt7463.c b/src/drivers/i2c/adt7463/adt7463.c
index d1c5819c21ad..3e1a3a5859af 100644
--- a/src/drivers/i2c/adt7463/adt7463.c
+++ b/src/drivers/i2c/adt7463/adt7463.c
@@ -80,7 +80,6 @@ static void adt7463_init(struct device *adt7463)
 static struct device_operations adt7463_operations = {
 	.read_resources = DEVICE_NOOP,
 	.set_resources = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init = adt7463_init,
 };
 
diff --git a/src/drivers/i2c/at24rf08c/at24rf08c.c b/src/drivers/i2c/at24rf08c/at24rf08c.c
index 32f702c49778..3841d64fd614 100644
--- a/src/drivers/i2c/at24rf08c/at24rf08c.c
+++ b/src/drivers/i2c/at24rf08c/at24rf08c.c
@@ -35,7 +35,6 @@ static void at24rf08c_init(struct device *dev)
 static struct device_operations at24rf08c_operations = {
 	.read_resources = DEVICE_NOOP,
 	.set_resources = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init = at24rf08c_init,
 };
 
diff --git a/src/drivers/i2c/ck505/ck505.c b/src/drivers/i2c/ck505/ck505.c
index 23fba474f16e..fac5208577df 100644
--- a/src/drivers/i2c/ck505/ck505.c
+++ b/src/drivers/i2c/ck505/ck505.c
@@ -48,7 +48,6 @@ static void ck505_init(struct device *dev)
 static struct device_operations ck505_operations = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 	.init			= ck505_init,
 };
 
diff --git a/src/drivers/i2c/da7219/da7219.c b/src/drivers/i2c/da7219/da7219.c
index eea82ba14882..43c6f9d41b5c 100644
--- a/src/drivers/i2c/da7219/da7219.c
+++ b/src/drivers/i2c/da7219/da7219.c
@@ -100,7 +100,6 @@ static const char *da7219_acpi_name(const struct device *dev)
 static struct device_operations da7219_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 #if CONFIG(HAVE_ACPI_TABLES)
 	.acpi_name		= da7219_acpi_name,
 	.acpi_fill_ssdt		= da7219_fill_ssdt,
diff --git a/src/drivers/i2c/generic/generic.c b/src/drivers/i2c/generic/generic.c
index 3e9da7539562..32b984a85fa2 100644
--- a/src/drivers/i2c/generic/generic.c
+++ b/src/drivers/i2c/generic/generic.c
@@ -182,7 +182,6 @@ static const char *i2c_generic_acpi_name(const struct device *dev)
 static struct device_operations i2c_generic_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 #if CONFIG(HAVE_ACPI_TABLES)
 	.acpi_name		= i2c_generic_acpi_name,
 	.acpi_fill_ssdt		= i2c_generic_fill_ssdt_generator,
diff --git a/src/drivers/i2c/hid/hid.c b/src/drivers/i2c/hid/hid.c
index 8a3acf948ae3..11d9d18298f5 100644
--- a/src/drivers/i2c/hid/hid.c
+++ b/src/drivers/i2c/hid/hid.c
@@ -39,7 +39,6 @@ static const char *i2c_hid_acpi_name(const struct device *dev)
 static struct device_operations i2c_hid_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 #if CONFIG(HAVE_ACPI_TABLES)
 	.acpi_name		= i2c_hid_acpi_name,
 	.acpi_fill_ssdt		= i2c_hid_fill_ssdt_generator,
diff --git a/src/drivers/i2c/lm96000/lm96000.c b/src/drivers/i2c/lm96000/lm96000.c
index dcb5b41f9ce3..54d2b88e7c22 100644
--- a/src/drivers/i2c/lm96000/lm96000.c
+++ b/src/drivers/i2c/lm96000/lm96000.c
@@ -207,7 +207,6 @@ static void lm96000_init(struct device *const dev)
 static struct device_operations lm96000_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 	.init			= lm96000_init,
 };
 
diff --git a/src/drivers/i2c/max98373/max98373.c b/src/drivers/i2c/max98373/max98373.c
index 257156b0f481..c6fa2e48d4b6 100644
--- a/src/drivers/i2c/max98373/max98373.c
+++ b/src/drivers/i2c/max98373/max98373.c
@@ -77,7 +77,6 @@ static const char *max98373_acpi_name(const struct device *dev)
 static struct device_operations max98373_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 	.acpi_name		= max98373_acpi_name,
 	.acpi_fill_ssdt		= max98373_fill_ssdt,
 };
diff --git a/src/drivers/i2c/max98927/max98927.c b/src/drivers/i2c/max98927/max98927.c
index f84e8d5197ec..166a4ef87bf9 100644
--- a/src/drivers/i2c/max98927/max98927.c
+++ b/src/drivers/i2c/max98927/max98927.c
@@ -73,7 +73,6 @@ static const char *max98927_acpi_name(const struct device *dev)
 static struct device_operations max98927_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 	.acpi_name		= max98927_acpi_name,
 	.acpi_fill_ssdt		= max98927_fill_ssdt,
 };
diff --git a/src/drivers/i2c/nau8825/nau8825.c b/src/drivers/i2c/nau8825/nau8825.c
index 5f5b4d526ac3..0c893a44cb45 100644
--- a/src/drivers/i2c/nau8825/nau8825.c
+++ b/src/drivers/i2c/nau8825/nau8825.c
@@ -88,7 +88,6 @@ static const char *nau8825_acpi_name(const struct device *dev)
 static struct device_operations nau8825_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 #if CONFIG(HAVE_ACPI_TABLES)
 	.acpi_name              = nau8825_acpi_name,
 	.acpi_fill_ssdt		= nau8825_fill_ssdt,
diff --git a/src/drivers/i2c/nct7802y/nct7802y.c b/src/drivers/i2c/nct7802y/nct7802y.c
index da148092d402..c21b002ba572 100644
--- a/src/drivers/i2c/nct7802y/nct7802y.c
+++ b/src/drivers/i2c/nct7802y/nct7802y.c
@@ -22,7 +22,6 @@ static void nct7802y_init(struct device *const dev)
 static struct device_operations nct7802y_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 	.init			= nct7802y_init,
 };
 
diff --git a/src/drivers/i2c/pca9538/pca9538.c b/src/drivers/i2c/pca9538/pca9538.c
index 50f634e055bb..68283b8006f4 100644
--- a/src/drivers/i2c/pca9538/pca9538.c
+++ b/src/drivers/i2c/pca9538/pca9538.c
@@ -41,9 +41,7 @@ static void pca9538_init(struct device *dev)
 static struct device_operations pca9538_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 	.init			= pca9538_init,
-	.final			= DEVICE_NOOP
 };
 
 static void pca9538_enable(struct device *dev)
diff --git a/src/drivers/i2c/pcf8523/pcf8523.c b/src/drivers/i2c/pcf8523/pcf8523.c
index 3e6af7541c7f..82945ffe2bc1 100644
--- a/src/drivers/i2c/pcf8523/pcf8523.c
+++ b/src/drivers/i2c/pcf8523/pcf8523.c
@@ -120,7 +120,6 @@ static void pcf8523_init(struct device *dev)
 static struct device_operations pcf8523c_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 	.init			= pcf8523_init,
 	.final			= pcf8523_final
 };
diff --git a/src/drivers/i2c/ptn3460/ptn3460.c b/src/drivers/i2c/ptn3460/ptn3460.c
index c4b8f12857d9..7b3bb5659696 100644
--- a/src/drivers/i2c/ptn3460/ptn3460.c
+++ b/src/drivers/i2c/ptn3460/ptn3460.c
@@ -129,9 +129,7 @@ __weak int mb_adjust_cfg(struct ptn_3460_config *cfg_ptr)
 static struct device_operations ptn3460_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 	.init			= ptn3460_init,
-	.final			= DEVICE_NOOP
 };
 
 static void ptn3460_enable(struct device *dev)
diff --git a/src/drivers/i2c/rt1011/rt1011.c b/src/drivers/i2c/rt1011/rt1011.c
index dc8410fda99c..19ee1f2c22ff 100644
--- a/src/drivers/i2c/rt1011/rt1011.c
+++ b/src/drivers/i2c/rt1011/rt1011.c
@@ -86,7 +86,6 @@ static const char *rt1011_acpi_name(const struct device *dev)
 static struct device_operations rt1011_ops = {
 	.read_resources = DEVICE_NOOP,
 	.set_resources = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.acpi_name = rt1011_acpi_name,
 	.acpi_fill_ssdt = rt1011_fill_ssdt,
 };
diff --git a/src/drivers/i2c/rt5663/rt5663.c b/src/drivers/i2c/rt5663/rt5663.c
index f6d023d52253..0e4bab03cc3d 100644
--- a/src/drivers/i2c/rt5663/rt5663.c
+++ b/src/drivers/i2c/rt5663/rt5663.c
@@ -77,7 +77,6 @@ static const char *rt5663_acpi_name(const struct device *dev)
 static struct device_operations rt5663_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 	.acpi_name		= rt5663_acpi_name,
 	.acpi_fill_ssdt		= rt5663_fill_ssdt,
 };
diff --git a/src/drivers/i2c/rtd2132/rtd2132.c b/src/drivers/i2c/rtd2132/rtd2132.c
index 2cefe6b7da4a..5dffdc800036 100644
--- a/src/drivers/i2c/rtd2132/rtd2132.c
+++ b/src/drivers/i2c/rtd2132/rtd2132.c
@@ -227,7 +227,6 @@ static void rtd2132_init(struct device *dev)
 static struct device_operations rtd2132_operations = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 	.init			= rtd2132_init,
 };
 
diff --git a/src/drivers/i2c/rx6110sa/rx6110sa.c b/src/drivers/i2c/rx6110sa/rx6110sa.c
index e9abe6266f11..c691965f9d54 100644
--- a/src/drivers/i2c/rx6110sa/rx6110sa.c
+++ b/src/drivers/i2c/rx6110sa/rx6110sa.c
@@ -167,7 +167,6 @@ static void rx6110sa_init(struct device *dev)
 static struct device_operations rx6110sa_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 	.init			= rx6110sa_init,
 	.final			= rx6110sa_final
 };
diff --git a/src/drivers/i2c/sx9310/sx9310.c b/src/drivers/i2c/sx9310/sx9310.c
index 552439501097..e1fe104fe8fe 100644
--- a/src/drivers/i2c/sx9310/sx9310.c
+++ b/src/drivers/i2c/sx9310/sx9310.c
@@ -81,7 +81,6 @@ static const char *i2c_sx9310_acpi_name(const struct device *dev)
 static struct device_operations i2c_sx9310_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 	.acpi_name		= i2c_sx9310_acpi_name,
 	.acpi_fill_ssdt		= i2c_sx9310_fill_ssdt,
 };
diff --git a/src/drivers/i2c/tpm/chip.c b/src/drivers/i2c/tpm/chip.c
index 2373069437fb..eeccb7d30d8f 100644
--- a/src/drivers/i2c/tpm/chip.c
+++ b/src/drivers/i2c/tpm/chip.c
@@ -64,7 +64,6 @@ static const char *i2c_tpm_acpi_name(const struct device *dev)
 static struct device_operations i2c_tpm_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 	.acpi_name		= i2c_tpm_acpi_name,
 	.acpi_fill_ssdt		= i2c_tpm_fill_ssdt,
 };
diff --git a/src/drivers/i2c/w83793/w83793.c b/src/drivers/i2c/w83793/w83793.c
index 8cf5d87b204a..c52cbb24da47 100644
--- a/src/drivers/i2c/w83793/w83793.c
+++ b/src/drivers/i2c/w83793/w83793.c
@@ -294,7 +294,6 @@ static void w83793_init(struct device *dev)
 static struct device_operations w83793_operations = {
 	.read_resources = DEVICE_NOOP,
 	.set_resources = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init = w83793_init,
 };
 
diff --git a/src/drivers/intel/ish/ish.c b/src/drivers/intel/ish/ish.c
index d7740a4d6fef..66e232d51a7b 100644
--- a/src/drivers/intel/ish/ish.c
+++ b/src/drivers/intel/ish/ish.c
@@ -32,7 +32,6 @@ static void ish_fill_ssdt_generator(struct device *dev)
 static struct device_operations intel_ish_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 	.acpi_fill_ssdt		= ish_fill_ssdt_generator,
 };
 
diff --git a/src/drivers/intel/mipi_camera/camera.c b/src/drivers/intel/mipi_camera/camera.c
index 0d8c10e7aee4..41a6eb588e38 100644
--- a/src/drivers/intel/mipi_camera/camera.c
+++ b/src/drivers/intel/mipi_camera/camera.c
@@ -70,7 +70,6 @@ static const char *camera_acpi_name(const struct device *dev)
 static struct device_operations camera_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 	.acpi_name		= camera_acpi_name,
 	.acpi_fill_ssdt		= camera_fill_ssdt,
 };
diff --git a/src/drivers/ipmi/ipmi_kcs_ops.c b/src/drivers/ipmi/ipmi_kcs_ops.c
index 2ab137e93725..7f39135d6d63 100644
--- a/src/drivers/ipmi/ipmi_kcs_ops.c
+++ b/src/drivers/ipmi/ipmi_kcs_ops.c
@@ -347,7 +347,6 @@ static void ipmi_read_resources(struct device *dev)
 static struct device_operations ops = {
 	.read_resources   = ipmi_read_resources,
 	.set_resources    = ipmi_set_resources,
-	.enable_resources = DEVICE_NOOP,
 	.init             = ipmi_kcs_init,
 #if CONFIG(HAVE_ACPI_TABLES)
 	.write_acpi_tables = ipmi_write_acpi_tables,
diff --git a/src/drivers/spi/acpi/acpi.c b/src/drivers/spi/acpi/acpi.c
index fc5feea86076..ebdd4099fad5 100644
--- a/src/drivers/spi/acpi/acpi.c
+++ b/src/drivers/spi/acpi/acpi.c
@@ -192,7 +192,6 @@ static const char *spi_acpi_name(const struct device *dev)
 static struct device_operations spi_acpi_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 	.acpi_name		= spi_acpi_name,
 	.acpi_fill_ssdt		= spi_acpi_fill_ssdt_generator,
 };
diff --git a/src/drivers/usb/acpi/usb_acpi.c b/src/drivers/usb/acpi/usb_acpi.c
index d6dc46f18005..13f37fa4e2f3 100644
--- a/src/drivers/usb/acpi/usb_acpi.c
+++ b/src/drivers/usb/acpi/usb_acpi.c
@@ -72,7 +72,6 @@ static void usb_acpi_fill_ssdt_generator(struct device *dev)
 static struct device_operations usb_acpi_ops = {
 	.read_resources		= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
-	.enable_resources	= DEVICE_NOOP,
 	.scan_bus		= scan_static_bus,
 	.acpi_fill_ssdt		= usb_acpi_fill_ssdt_generator,
 };
diff --git a/src/ec/compal/ene932/ec.c b/src/ec/compal/ene932/ec.c
index 8eebfa8c3aa4..a022fa758095 100644
--- a/src/ec/compal/ene932/ec.c
+++ b/src/ec/compal/ene932/ec.c
@@ -123,7 +123,6 @@ static void ene932_init(struct device *dev)
 static struct device_operations ops = {
 	.init             = ene932_init,
 	.read_resources   = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 };
 
 static struct pnp_info pnp_dev_info[] = {
diff --git a/src/ec/google/chromeec/ec_lpc.c b/src/ec/google/chromeec/ec_lpc.c
index dd78922d008b..c34082c56bdb 100644
--- a/src/ec/google/chromeec/ec_lpc.c
+++ b/src/ec/google/chromeec/ec_lpc.c
@@ -438,7 +438,6 @@ static void lpc_ec_read_resources(struct device *dev)
 static struct device_operations ops = {
 	.init             = lpc_ec_init,
 	.read_resources   = lpc_ec_read_resources,
-	.enable_resources = DEVICE_NOOP,
 	.set_resources    = DEVICE_NOOP,
 #if CONFIG(HAVE_ACPI_TABLES)
 	.acpi_name        = google_chromeec_acpi_name,
diff --git a/src/ec/google/wilco/chip.c b/src/ec/google/wilco/chip.c
index 2ce9bf0ad458..f4bea48be444 100644
--- a/src/ec/google/wilco/chip.c
+++ b/src/ec/google/wilco/chip.c
@@ -219,7 +219,6 @@ static const char *wilco_ec_acpi_name(const struct device *dev)
 static struct device_operations ops = {
 	.init			= wilco_ec_init,
 	.read_resources		= wilco_ec_read_resources,
-	.enable_resources	= DEVICE_NOOP,
 	.set_resources		= DEVICE_NOOP,
 	.acpi_fill_ssdt		= wilco_ec_fill_ssdt_generator,
 	.acpi_name		= wilco_ec_acpi_name,
diff --git a/src/ec/quanta/ene_kb3940q/ec.c b/src/ec/quanta/ene_kb3940q/ec.c
index 15c04003c3f9..f6acd218a738 100644
--- a/src/ec/quanta/ene_kb3940q/ec.c
+++ b/src/ec/quanta/ene_kb3940q/ec.c
@@ -133,7 +133,6 @@ static void ene_kb3940q_init(struct device *dev)
 static struct device_operations ops = {
 	.init             = ene_kb3940q_init,
 	.read_resources   = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 };
 
 static struct pnp_info pnp_dev_info[] = {
diff --git a/src/ec/quanta/it8518/ec.c b/src/ec/quanta/it8518/ec.c
index fd17097d0ca6..19c07c50a066 100644
--- a/src/ec/quanta/it8518/ec.c
+++ b/src/ec/quanta/it8518/ec.c
@@ -147,7 +147,6 @@ static void it8518_init(struct device *dev)
 static struct device_operations ops = {
 	.init             = it8518_init,
 	.read_resources   = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 };
 
 static struct pnp_info pnp_dev_info[] = {
diff --git a/src/ec/roda/it8518/ec.c b/src/ec/roda/it8518/ec.c
index 8f36decd6824..02f4c9b9db2b 100644
--- a/src/ec/roda/it8518/ec.c
+++ b/src/ec/roda/it8518/ec.c
@@ -36,7 +36,6 @@ static void it8518_init(struct device *dev)
 static struct device_operations ops = {
 	.init             = it8518_init,
 	.read_resources   = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 };
 
 static struct pnp_info pnp_dev_info[] = {
diff --git a/src/mainboard/emulation/qemu-i440fx/northbridge.c b/src/mainboard/emulation/qemu-i440fx/northbridge.c
index e5df0168c0d9..7eee0f3f35bd 100644
--- a/src/mainboard/emulation/qemu-i440fx/northbridge.c
+++ b/src/mainboard/emulation/qemu-i440fx/northbridge.c
@@ -275,7 +275,6 @@ static void cpu_bus_scan(struct device *bus)
 static struct device_operations cpu_bus_ops = {
 	.read_resources   = DEVICE_NOOP,
 	.set_resources    = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init             = cpu_bus_init,
 	.scan_bus         = cpu_bus_scan,
 };
diff --git a/src/northbridge/amd/agesa/family14/northbridge.c b/src/northbridge/amd/agesa/family14/northbridge.c
index 714597e08833..85b3172a2fd3 100644
--- a/src/northbridge/amd/agesa/family14/northbridge.c
+++ b/src/northbridge/amd/agesa/family14/northbridge.c
@@ -818,7 +818,6 @@ struct chip_operations northbridge_amd_agesa_family14_ops = {
 static struct device_operations pci_domain_ops = {
 	.read_resources = domain_read_resources,
 	.set_resources = domain_set_resources,
-	.init = DEVICE_NOOP,
 	.scan_bus = pci_domain_scan_bus,
 	.acpi_name = domain_acpi_name,
 };
@@ -826,7 +825,6 @@ static struct device_operations pci_domain_ops = {
 static struct device_operations cpu_bus_ops = {
 	.read_resources = DEVICE_NOOP,
 	.set_resources = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init = cpu_bus_init,
 	.scan_bus = cpu_bus_scan,
 };
diff --git a/src/northbridge/amd/agesa/family15tn/northbridge.c b/src/northbridge/amd/agesa/family15tn/northbridge.c
index 652d8a353226..aa0aca3b6bd4 100644
--- a/src/northbridge/amd/agesa/family15tn/northbridge.c
+++ b/src/northbridge/amd/agesa/family15tn/northbridge.c
@@ -549,7 +549,6 @@ static struct device_operations northbridge_operations = {
 	.read_resources	  = nb_read_resources,
 	.set_resources	  = nb_set_resources,
 	.enable_resources = pci_dev_enable_resources,
-	.init		  = DEVICE_NOOP,
 	.acpi_fill_ssdt   = northbridge_fill_ssdt_generator,
 	.write_acpi_tables = agesa_write_acpi_tables,
 };
@@ -762,7 +761,6 @@ static void domain_set_resources(struct device *dev)
 static struct device_operations pci_domain_ops = {
 	.read_resources	  = domain_read_resources,
 	.set_resources	  = domain_set_resources,
-	.init		  = DEVICE_NOOP,
 	.scan_bus	  = pci_domain_scan_bus,
 };
 
@@ -896,7 +894,6 @@ static void cpu_bus_init(struct device *dev)
 static struct device_operations cpu_bus_ops = {
 	.read_resources	  = DEVICE_NOOP,
 	.set_resources	  = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init		  = cpu_bus_init,
 	.scan_bus	  = cpu_bus_scan,
 };
diff --git a/src/northbridge/amd/agesa/family16kb/northbridge.c b/src/northbridge/amd/agesa/family16kb/northbridge.c
index 38f3dad86421..bdf405847600 100644
--- a/src/northbridge/amd/agesa/family16kb/northbridge.c
+++ b/src/northbridge/amd/agesa/family16kb/northbridge.c
@@ -548,7 +548,6 @@ static struct device_operations northbridge_operations = {
 	.read_resources	  = read_resources,
 	.set_resources	  = set_resources,
 	.enable_resources = pci_dev_enable_resources,
-	.init		  = DEVICE_NOOP,
 	.acpi_fill_ssdt   = northbridge_fill_ssdt_generator,
 	.write_acpi_tables = agesa_write_acpi_tables,
 };
@@ -788,7 +787,6 @@ static const char *domain_acpi_name(const struct device *dev)
 static struct device_operations pci_domain_ops = {
 	.read_resources	  = domain_read_resources,
 	.set_resources	  = domain_set_resources,
-	.init		  = DEVICE_NOOP,
 	.scan_bus	  = pci_domain_scan_bus,
 	.acpi_name        = domain_acpi_name,
 };
@@ -923,7 +921,6 @@ static void cpu_bus_init(struct device *dev)
 static struct device_operations cpu_bus_ops = {
 	.read_resources	  = DEVICE_NOOP,
 	.set_resources	  = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init		  = cpu_bus_init,
 	.scan_bus	  = cpu_bus_scan,
 };
diff --git a/src/northbridge/amd/pi/00630F01/northbridge.c b/src/northbridge/amd/pi/00630F01/northbridge.c
index 5107bf756062..583379cf94c5 100644
--- a/src/northbridge/amd/pi/00630F01/northbridge.c
+++ b/src/northbridge/amd/pi/00630F01/northbridge.c
@@ -543,7 +543,6 @@ static struct device_operations northbridge_operations = {
 	.read_resources	  = read_resources,
 	.set_resources	  = set_resources,
 	.enable_resources = pci_dev_enable_resources,
-	.init		  = DEVICE_NOOP,
 	.acpi_fill_ssdt   = northbridge_fill_ssdt_generator,
 	.write_acpi_tables = agesa_write_acpi_tables,
 };
@@ -897,7 +896,6 @@ static void cpu_bus_init(struct device *dev)
 static struct device_operations cpu_bus_ops = {
 	.read_resources	  = DEVICE_NOOP,
 	.set_resources	  = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init		  = cpu_bus_init,
 	.scan_bus	  = cpu_bus_scan,
 };
diff --git a/src/northbridge/amd/pi/00660F01/northbridge.c b/src/northbridge/amd/pi/00660F01/northbridge.c
index 3896ff91f885..9b0c490e77d0 100644
--- a/src/northbridge/amd/pi/00660F01/northbridge.c
+++ b/src/northbridge/amd/pi/00660F01/northbridge.c
@@ -904,7 +904,6 @@ static void cpu_bus_init(struct device *dev)
 static struct device_operations cpu_bus_ops = {
 	.read_resources	  = DEVICE_NOOP,
 	.set_resources	  = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init		  = cpu_bus_init,
 	.scan_bus	  = cpu_bus_scan,
 };
diff --git a/src/northbridge/amd/pi/00730F01/northbridge.c b/src/northbridge/amd/pi/00730F01/northbridge.c
index 4a24d3550ac9..bab5cdceac08 100644
--- a/src/northbridge/amd/pi/00730F01/northbridge.c
+++ b/src/northbridge/amd/pi/00730F01/northbridge.c
@@ -1260,7 +1260,6 @@ static void cpu_bus_init(struct device *dev)
 static struct device_operations cpu_bus_ops = {
 	.read_resources	  = DEVICE_NOOP,
 	.set_resources	  = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init		  = cpu_bus_init,
 	.scan_bus	  = cpu_bus_scan,
 };
diff --git a/src/northbridge/intel/e7505/northbridge.c b/src/northbridge/intel/e7505/northbridge.c
index e0340da38a43..fc1496de9c9b 100644
--- a/src/northbridge/intel/e7505/northbridge.c
+++ b/src/northbridge/intel/e7505/northbridge.c
@@ -82,7 +82,6 @@ static void cpu_bus_init(struct device *dev)
 static struct device_operations cpu_bus_ops = {
 	.read_resources   = DEVICE_NOOP,
 	.set_resources    = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init             = cpu_bus_init,
 };
 
diff --git a/src/northbridge/intel/gm45/northbridge.c b/src/northbridge/intel/gm45/northbridge.c
index 4782bff4b477..c54e3353b1e8 100644
--- a/src/northbridge/intel/gm45/northbridge.c
+++ b/src/northbridge/intel/gm45/northbridge.c
@@ -228,7 +228,6 @@ static struct device_operations pci_domain_ops = {
 static struct device_operations cpu_bus_ops = {
 	.read_resources   = DEVICE_NOOP,
 	.set_resources    = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init             = mp_cpu_bus_init,
 };
 
diff --git a/src/northbridge/intel/haswell/northbridge.c b/src/northbridge/intel/haswell/northbridge.c
index 6f892681d7bb..0d94dcf6de02 100644
--- a/src/northbridge/intel/haswell/northbridge.c
+++ b/src/northbridge/intel/haswell/northbridge.c
@@ -484,7 +484,6 @@ static const struct pci_driver mc_driver_hsw __pci_driver = {
 static struct device_operations cpu_bus_ops = {
 	.read_resources   = DEVICE_NOOP,
 	.set_resources    = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init             = mp_cpu_bus_init,
 };
 
diff --git a/src/northbridge/intel/i440bx/northbridge.c b/src/northbridge/intel/i440bx/northbridge.c
index eb0d3b1a354f..f4df62bad107 100644
--- a/src/northbridge/intel/i440bx/northbridge.c
+++ b/src/northbridge/intel/i440bx/northbridge.c
@@ -81,7 +81,6 @@ static void cpu_bus_init(struct device *dev)
 static struct device_operations cpu_bus_ops = {
 	.read_resources   = DEVICE_NOOP,
 	.set_resources    = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init             = cpu_bus_init,
 };
 
diff --git a/src/northbridge/intel/i945/northbridge.c b/src/northbridge/intel/i945/northbridge.c
index 4fdd282858a8..a82cd0f94100 100644
--- a/src/northbridge/intel/i945/northbridge.c
+++ b/src/northbridge/intel/i945/northbridge.c
@@ -200,7 +200,6 @@ static const struct pci_driver mc_driver __pci_driver = {
 static struct device_operations cpu_bus_ops = {
 	.read_resources   = DEVICE_NOOP,
 	.set_resources    = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init             = mp_cpu_bus_init,
 };
 
diff --git a/src/northbridge/intel/ironlake/northbridge.c b/src/northbridge/intel/ironlake/northbridge.c
index 4144758e9a88..12592fcc6671 100644
--- a/src/northbridge/intel/ironlake/northbridge.c
+++ b/src/northbridge/intel/ironlake/northbridge.c
@@ -255,7 +255,6 @@ static const struct pci_driver mc_driver_ard __pci_driver = {
 static struct device_operations cpu_bus_ops = {
 	.read_resources = DEVICE_NOOP,
 	.set_resources = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init = mp_cpu_bus_init,
 };
 
diff --git a/src/northbridge/intel/pineview/northbridge.c b/src/northbridge/intel/pineview/northbridge.c
index 36f39b0fcd38..2c6944cf8abd 100644
--- a/src/northbridge/intel/pineview/northbridge.c
+++ b/src/northbridge/intel/pineview/northbridge.c
@@ -184,7 +184,6 @@ static struct device_operations pci_domain_ops = {
 static struct device_operations cpu_bus_ops = {
 	.read_resources   = DEVICE_NOOP,
 	.set_resources    = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init             = mp_cpu_bus_init,
 };
 
diff --git a/src/northbridge/intel/sandybridge/northbridge.c b/src/northbridge/intel/sandybridge/northbridge.c
index 6ec36f734332..ff42369b2c06 100644
--- a/src/northbridge/intel/sandybridge/northbridge.c
+++ b/src/northbridge/intel/sandybridge/northbridge.c
@@ -461,7 +461,6 @@ static const struct pci_driver mc_driver __pci_driver = {
 static struct device_operations cpu_bus_ops = {
 	.read_resources   = DEVICE_NOOP,
 	.set_resources    = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init             = mp_cpu_bus_init,
 };
 
diff --git a/src/northbridge/intel/x4x/northbridge.c b/src/northbridge/intel/x4x/northbridge.c
index 6397631c8311..8b49dab35654 100644
--- a/src/northbridge/intel/x4x/northbridge.c
+++ b/src/northbridge/intel/x4x/northbridge.c
@@ -179,7 +179,6 @@ static struct device_operations pci_domain_ops = {
 static struct device_operations cpu_bus_ops = {
 	.read_resources   = DEVICE_NOOP,
 	.set_resources    = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init             = mp_cpu_bus_init,
 };
 
diff --git a/src/soc/amd/picasso/chip.c b/src/soc/amd/picasso/chip.c
index ae3ae3262670..865dad875abb 100644
--- a/src/soc/amd/picasso/chip.c
+++ b/src/soc/amd/picasso/chip.c
@@ -21,7 +21,6 @@ extern const char *i2c_acpi_name(const struct device *dev);
 struct device_operations cpu_bus_ops = {
 	.read_resources	  = DEVICE_NOOP,
 	.set_resources	  = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init		  = picasso_init_cpus,
 	.acpi_fill_ssdt   = generate_cpu_entries,
 };
diff --git a/src/soc/amd/picasso/i2c.c b/src/soc/amd/picasso/i2c.c
index dec409f06029..f17eccd4876c 100644
--- a/src/soc/amd/picasso/i2c.c
+++ b/src/soc/amd/picasso/i2c.c
@@ -128,7 +128,6 @@ struct device_operations picasso_i2c_mmio_ops = {
 	/* TODO(teravest): Move I2C resource info here. */
 	.read_resources = DEVICE_NOOP,
 	.set_resources = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.scan_bus = scan_smbus,
 	.acpi_name = i2c_acpi_name,
 	.acpi_fill_ssdt = dw_i2c_acpi_fill_ssdt,
diff --git a/src/soc/amd/stoneyridge/chip.c b/src/soc/amd/stoneyridge/chip.c
index 8efe64feca0d..b27683a6dc80 100644
--- a/src/soc/amd/stoneyridge/chip.c
+++ b/src/soc/amd/stoneyridge/chip.c
@@ -26,7 +26,6 @@ extern const char *i2c_acpi_name(const struct device *dev);
 struct device_operations cpu_bus_ops = {
 	.read_resources	  = DEVICE_NOOP,
 	.set_resources	  = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init		  = stoney_init_cpus,
 	.acpi_fill_ssdt   = generate_cpu_entries,
 };
diff --git a/src/soc/amd/stoneyridge/i2c.c b/src/soc/amd/stoneyridge/i2c.c
index 3f95be73c339..8ec3555c1701 100644
--- a/src/soc/amd/stoneyridge/i2c.c
+++ b/src/soc/amd/stoneyridge/i2c.c
@@ -112,7 +112,6 @@ struct device_operations stoneyridge_i2c_mmio_ops = {
 	/* TODO(teravest): Move I2C resource info here. */
 	.read_resources = DEVICE_NOOP,
 	.set_resources = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.scan_bus = scan_smbus,
 	.acpi_name = i2c_acpi_name,
 	.acpi_fill_ssdt = dw_i2c_acpi_fill_ssdt,
diff --git a/src/soc/cavium/cn81xx/soc.c b/src/soc/cavium/cn81xx/soc.c
index 512a337d7b51..f3adc47a42d4 100644
--- a/src/soc/cavium/cn81xx/soc.c
+++ b/src/soc/cavium/cn81xx/soc.c
@@ -382,7 +382,6 @@ static void soc_final(struct device *dev)
 static struct device_operations soc_ops = {
 	.read_resources   = soc_read_resources,
 	.set_resources    = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init             = soc_init,
 	.final            = soc_final,
 };
diff --git a/src/soc/intel/apollolake/chip.c b/src/soc/intel/apollolake/chip.c
index 2c8737f6547f..cf4763d67d6f 100644
--- a/src/soc/intel/apollolake/chip.c
+++ b/src/soc/intel/apollolake/chip.c
@@ -221,7 +221,6 @@ static struct device_operations pci_domain_ops = {
 static struct device_operations cpu_bus_ops = {
 	.read_resources = DEVICE_NOOP,
 	.set_resources = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init = apollolake_init_cpus,
 	.acpi_fill_ssdt = generate_cpu_entries,
 };
diff --git a/src/soc/intel/baytrail/chip.c b/src/soc/intel/baytrail/chip.c
index 39802dcabb63..b51d8c31de9d 100644
--- a/src/soc/intel/baytrail/chip.c
+++ b/src/soc/intel/baytrail/chip.c
@@ -23,7 +23,6 @@ static struct device_operations pci_domain_ops = {
 static struct device_operations cpu_bus_ops = {
 	.read_resources   = DEVICE_NOOP,
 	.set_resources    = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init             = baytrail_init_cpus,
 };
 
diff --git a/src/soc/intel/braswell/chip.c b/src/soc/intel/braswell/chip.c
index d1540f844ce4..991e30f3de4a 100644
--- a/src/soc/intel/braswell/chip.c
+++ b/src/soc/intel/braswell/chip.c
@@ -26,7 +26,6 @@ static struct device_operations pci_domain_ops = {
 static struct device_operations cpu_bus_ops = {
 	.read_resources   = DEVICE_NOOP,
 	.set_resources    = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init             = soc_init_cpus
 };
 
diff --git a/src/soc/intel/broadwell/chip.c b/src/soc/intel/broadwell/chip.c
index 1cf5ada5301a..4caa23653d7d 100644
--- a/src/soc/intel/broadwell/chip.c
+++ b/src/soc/intel/broadwell/chip.c
@@ -25,7 +25,6 @@ static struct device_operations pci_domain_ops = {
 static struct device_operations cpu_bus_ops = {
 	.read_resources   = DEVICE_NOOP,
 	.set_resources    = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init             = &broadwell_init_cpus,
 };
 
diff --git a/src/soc/intel/cannonlake/chip.c b/src/soc/intel/cannonlake/chip.c
index d3918a360bc8..e323346a123e 100644
--- a/src/soc/intel/cannonlake/chip.c
+++ b/src/soc/intel/cannonlake/chip.c
@@ -186,8 +186,6 @@ static struct device_operations pci_domain_ops = {
 static struct device_operations cpu_bus_ops = {
 	.read_resources   = DEVICE_NOOP,
 	.set_resources    = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
-	.init             = DEVICE_NOOP,
 	.acpi_fill_ssdt   = generate_cpu_entries,
 };
 
diff --git a/src/soc/intel/denverton_ns/chip.c b/src/soc/intel/denverton_ns/chip.c
index d21f053b41ef..dbee2977a204 100644
--- a/src/soc/intel/denverton_ns/chip.c
+++ b/src/soc/intel/denverton_ns/chip.c
@@ -44,7 +44,6 @@ static struct device_operations pci_domain_ops = {
 static struct device_operations cpu_bus_ops = {
 	.read_resources = DEVICE_NOOP,
 	.set_resources = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init = denverton_init_cpus,
 #if CONFIG(HAVE_ACPI_TABLES)
 	.acpi_fill_ssdt = generate_cpu_entries,
diff --git a/src/soc/intel/denverton_ns/uart.c b/src/soc/intel/denverton_ns/uart.c
index d6babc48dcca..ce608195f6d3 100644
--- a/src/soc/intel/denverton_ns/uart.c
+++ b/src/soc/intel/denverton_ns/uart.c
@@ -53,7 +53,6 @@ static struct device_operations uart_ops = {
 	.set_resources = pci_dev_set_resources,
 	.enable_resources = pci_dev_enable_resources,
 	.init = pci_dev_init,
-	.enable = DEVICE_NOOP
 };
 
 static const struct pci_driver uart_driver __pci_driver = {
diff --git a/src/soc/intel/icelake/chip.c b/src/soc/intel/icelake/chip.c
index 483e0d6e092c..36cd0d15e5bd 100644
--- a/src/soc/intel/icelake/chip.c
+++ b/src/soc/intel/icelake/chip.c
@@ -142,8 +142,6 @@ static struct device_operations pci_domain_ops = {
 static struct device_operations cpu_bus_ops = {
 	.read_resources   = DEVICE_NOOP,
 	.set_resources    = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
-	.init             = DEVICE_NOOP,
 	.acpi_fill_ssdt   = generate_cpu_entries,
 };
 
diff --git a/src/soc/intel/jasperlake/chip.c b/src/soc/intel/jasperlake/chip.c
index 6a560270e701..643d8511d41e 100644
--- a/src/soc/intel/jasperlake/chip.c
+++ b/src/soc/intel/jasperlake/chip.c
@@ -149,8 +149,6 @@ static struct device_operations pci_domain_ops = {
 static struct device_operations cpu_bus_ops = {
 	.read_resources   = DEVICE_NOOP,
 	.set_resources    = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
-	.init             = DEVICE_NOOP,
 #if CONFIG(HAVE_ACPI_TABLES)
 	.acpi_fill_ssdt   = generate_cpu_entries,
 #endif
diff --git a/src/soc/intel/skylake/chip.c b/src/soc/intel/skylake/chip.c
index c3b22e2e0dd5..6e471fb2d306 100644
--- a/src/soc/intel/skylake/chip.c
+++ b/src/soc/intel/skylake/chip.c
@@ -97,8 +97,6 @@ static struct device_operations pci_domain_ops = {
 static struct device_operations cpu_bus_ops = {
 	.read_resources   = DEVICE_NOOP,
 	.set_resources    = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
-	.init             = DEVICE_NOOP,
 #if CONFIG(HAVE_ACPI_TABLES)
 	.acpi_fill_ssdt   = generate_cpu_entries,
 #endif
diff --git a/src/soc/intel/tigerlake/chip.c b/src/soc/intel/tigerlake/chip.c
index f57f51dc7d93..b93d1fc2ba0c 100644
--- a/src/soc/intel/tigerlake/chip.c
+++ b/src/soc/intel/tigerlake/chip.c
@@ -149,8 +149,6 @@ static struct device_operations pci_domain_ops = {
 static struct device_operations cpu_bus_ops = {
 	.read_resources   = DEVICE_NOOP,
 	.set_resources    = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
-	.init             = DEVICE_NOOP,
 #if CONFIG(HAVE_ACPI_TABLES)
 	.acpi_fill_ssdt   = generate_cpu_entries,
 #endif
diff --git a/src/soc/intel/xeon_sp/cpx/chip.c b/src/soc/intel/xeon_sp/cpx/chip.c
index ef18e45e9b11..5f1dedf4979b 100644
--- a/src/soc/intel/xeon_sp/cpx/chip.c
+++ b/src/soc/intel/xeon_sp/cpx/chip.c
@@ -33,7 +33,6 @@ static struct device_operations pci_domain_ops = {
 static struct device_operations cpu_bus_ops = {
 	.read_resources = DEVICE_NOOP,
 	.set_resources = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init = cpx_init_cpus,
 };
 
diff --git a/src/soc/intel/xeon_sp/skx/chip.c b/src/soc/intel/xeon_sp/skx/chip.c
index 90ae0252e2e6..fbd13d524c03 100644
--- a/src/soc/intel/xeon_sp/skx/chip.c
+++ b/src/soc/intel/xeon_sp/skx/chip.c
@@ -484,7 +484,6 @@ static struct device_operations pci_domain_ops = {
 static struct device_operations cpu_bus_ops = {
 	.read_resources = DEVICE_NOOP,
 	.set_resources = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
 	.init = xeon_sp_init_cpus,
 #if CONFIG(HAVE_ACPI_TABLES)
 	/* defined in src/soc/intel/common/block/acpi/acpi.c */
diff --git a/src/soc/nvidia/tegra210/soc.c b/src/soc/nvidia/tegra210/soc.c
index b4f51e8587a6..5fc1e6a9dd2a 100644
--- a/src/soc/nvidia/tegra210/soc.c
+++ b/src/soc/nvidia/tegra210/soc.c
@@ -52,8 +52,6 @@ static void soc_read_resources(struct device *dev)
 static struct device_operations soc_ops = {
 	.read_resources   = soc_read_resources,
 	.set_resources    = DEVICE_NOOP,
-	.enable_resources = DEVICE_NOOP,
-	.init             = DEVICE_NOOP,
 };
 
 static void enable_tegra210_dev(struct device *dev)
diff --git a/src/southbridge/amd/agesa/hudson/pci.c b/src/southbridge/amd/agesa/hudson/pci.c
index cacc59d926c3..60909fa9df13 100644
--- a/src/southbridge/amd/agesa/hudson/pci.c
+++ b/src/southbridge/amd/agesa/hudson/pci.c
@@ -36,7 +36,6 @@ static struct device_operations pci_ops = {
 	.read_resources = pci_bus_read_resources,
 	.set_resources = pci_dev_set_resources,
 	.enable_resources = pci_bus_enable_resources,
-	.init = DEVICE_NOOP,
 	.scan_bus = pci_scan_bridge,
 	.reset_bus = pci_bus_reset,
 	.ops_pci = &lops_pci,
diff --git a/src/superio/common/generic.c b/src/superio/common/generic.c
index 20ffb3db18f7..88432ff68ddc 100644
--- a/src/superio/common/generic.c
+++ b/src/superio/common/generic.c
@@ -297,7 +297,6 @@ static const char *generic_acpi_name(const struct device *dev)
 static struct device_operations ops = {
 	.read_resources   = generic_read_resources,
 	.set_resources    = generic_set_resources,
-	.enable_resources = DEVICE_NOOP,
 	.scan_bus	  = scan_static_bus,
 #if CONFIG(HAVE_ACPI_TABLES)
 	.acpi_fill_ssdt	  = generic_ssdt,
diff --git a/src/vendorcode/google/chromeos/chromeos.h b/src/vendorcode/google/chromeos/chromeos.h
index d53109ca3b7d..f7df10f22e84 100644
--- a/src/vendorcode/google/chromeos/chromeos.h
+++ b/src/vendorcode/google/chromeos/chromeos.h
@@ -72,7 +72,7 @@ void mainboard_chromeos_acpi_generate(void);
 #if CONFIG(CHROMEOS)
 void chromeos_dsdt_generator(struct device *dev);
 #else
-#define chromeos_dsdt_generator DEVICE_NOOP
+#define chromeos_dsdt_generator NULL
 #endif
 
 enum {