drivers: eeprom: Refactor drivers to use shared init priority

Refactors all of the EEPROM drivers to use a shared driver class
initialization priority configuration, CONFIG_EEPROM_INIT_PRIORITY, to
allow configuring EEPROM drivers separately from other devices. This is
similar to other driver classes like I2C and SPI.

The default is set to CONFIG_KERNEL_INIT_PRIORITY_DEVICE to preserve the
existing default initialization priority for most drivers. The
exceptions are at2x and emul drivers which have dependencies on SPI,
I2C, or flash drivers and must therefore initialize later than the
default device priority.

Signed-off-by: Maureen Helm <maureen.helm@intel.com>

boards/shields/lmp90100_evb/Kconfig.defconfig

@@ -27,6 +27,9 @@ config I2C
 config EEPROM_AT24
 	default y
 
+config EEPROM_INIT_PRIORITY
+	default 75
+
 endif # EEPROM
 
 endif # SHIELD_LMP90100_EVB

boards/shields/x_nucleo_eeprma2/Kconfig.defconfig

@@ -17,6 +17,9 @@ config I2C
 config EEPROM_AT24
 	default y
 
+config EEPROM_INIT_PRIORITY
+	default 75
+
 endif # EEPROM
 
 endif # SHIELD_X_NUCLEO_EEPRMA2

drivers/eeprom/Kconfig

@@ -14,6 +14,12 @@ module = EEPROM
 module-str = eeprom
 source "subsys/logging/Kconfig.template.log_config"
 
+config EEPROM_INIT_PRIORITY
+	int "EEPROM init priority"
+	default KERNEL_INIT_PRIORITY_DEVICE
+	help
+	  EEPROM driver device initialization priority.
+
 config EEPROM_SHELL
 	bool "Enable EEPROM shell"
 	default y
@@ -49,11 +55,6 @@ config EEPROM_AT25
 	help
 	  Enable support for Atmel AT25 (and compatible) SPI EEPROMs.
 
-config EEPROM_AT2X_INIT_PRIORITY
-	int "AT2X EEPROM init priority"
-	default 75
-	depends on EEPROM_AT2X
-
 source "drivers/eeprom/Kconfig.lpc11u6x"
 source "drivers/eeprom/Kconfig.stm32"
 source "drivers/eeprom/Kconfig.eeprom_emu"

drivers/eeprom/Kconfig.eeprom_emu

@@ -10,8 +10,3 @@ config EEPROM_EMULATOR
 	  performed to the EEPROM is maximized by using a flash area that is
 	  larger than the EEPROM area and by storing only changes to the EEPROM
 	  data.
-
-config EEPROM_EMULATOR_INIT_PRIORITY
-	int "EEPROM emulator init priority"
-	default 75
-	depends on EEPROM_EMULATOR

drivers/eeprom/eeprom_at2x.c

@@ -629,7 +629,7 @@ static const struct eeprom_driver_api eeprom_at2x_api = {
 	DEVICE_DT_DEFINE(INST_DT_AT2X(n, t), &eeprom_at2x_init, \
 			    NULL, &eeprom_at##t##_data_##n, \
 			    &eeprom_at##t##_config_##n, POST_KERNEL, \
-			    CONFIG_EEPROM_AT2X_INIT_PRIORITY, \
+			    CONFIG_EEPROM_INIT_PRIORITY, \
 			    &eeprom_at2x_api)
 
 #define EEPROM_AT24_DEVICE(n) EEPROM_AT2X_DEVICE(n, 24)

drivers/eeprom/eeprom_emulator.c

@@ -809,6 +809,6 @@ static const struct eeprom_driver_api eeprom_emu_api = {
 	DEVICE_DT_INST_DEFINE(n, &eeprom_emu_init, \
 		NULL, &eeprom_emu_##n##_data, \
 		&eeprom_emu_##n##_config, POST_KERNEL, \
-		CONFIG_EEPROM_EMULATOR_INIT_PRIORITY, &eeprom_emu_api); \
+		CONFIG_EEPROM_INIT_PRIORITY, &eeprom_emu_api); \
 
 DT_INST_FOREACH_STATUS_OKAY(EEPROM_EMU_INIT)

drivers/eeprom/eeprom_lpc11u6x.c

@@ -117,4 +117,4 @@ static const struct eeprom_lpc11u6x_config eeprom_config = {
 
 DEVICE_DT_INST_DEFINE(0, &eeprom_lpc11u6x_init, NULL, NULL,
 		    &eeprom_config, POST_KERNEL,
-		    CONFIG_KERNEL_INIT_PRIORITY_DEVICE, &eeprom_lpc11u6x_api);
+		    CONFIG_EEPROM_INIT_PRIORITY, &eeprom_lpc11u6x_api);

drivers/eeprom/eeprom_simulator.c

@@ -269,7 +269,7 @@ static int eeprom_sim_init(const struct device *dev)
 
 DEVICE_DT_INST_DEFINE(0, &eeprom_sim_init, NULL,
 		    NULL, &eeprom_sim_config_0, POST_KERNEL,
-		    CONFIG_KERNEL_INIT_PRIORITY_DEVICE, &eeprom_sim_api);
+		    CONFIG_EEPROM_INIT_PRIORITY, &eeprom_sim_api);
 
 #ifdef CONFIG_ARCH_POSIX
 

drivers/eeprom/eeprom_stm32.c

@@ -124,4 +124,4 @@ static const struct eeprom_stm32_config eeprom_config = {
 
 DEVICE_DT_INST_DEFINE(0, &eeprom_stm32_init, NULL, NULL,
 		    &eeprom_config, POST_KERNEL,
-		    CONFIG_KERNEL_INIT_PRIORITY_DEVICE, &eeprom_stm32_api);
+		    CONFIG_EEPROM_INIT_PRIORITY, &eeprom_stm32_api);

tests/drivers/eeprom/boards/native_posix.conf

@@ -5,4 +5,5 @@ CONFIG_EMUL=y
 CONFIG_I2C=y
 CONFIG_I2C_EMUL=y
 CONFIG_EEPROM_AT24=y
+CONFIG_EEPROM_INIT_PRIORITY=75
 CONFIG_EMUL_EEPROM_AT2X=y

tests/drivers/eeprom/prj_qemu_x86.conf

@@ -3,3 +3,4 @@ CONFIG_TEST_USERSPACE=y
 CONFIG_EEPROM=y
 CONFIG_EEPROM_SIMULATOR=y
 CONFIG_EEPROM_EMULATOR=y
+CONFIG_EEPROM_INIT_PRIORITY=75