drivers/timer: Remove legacy APIC driver

For a while now, we've had two APIC drivers.  The older was preserved
initially as the new (much smaller, "new style") code didn't have
support for Quark interrupt handling.  But that's long dead now.  Just
remove it.

Note that this migrates the one board using this driver (acrn) to
CONFIG_APIC_TIMER instead.

Signed-off-by: Andy Ross <[email protected]>

Author: Andy Ross

boards/x86/acrn/acrn_defconfig

@@ -4,7 +4,7 @@ CONFIG_SOC_IA32=y
 CONFIG_BOARD_ACRN=y
 CONFIG_PIC_DISABLE=y
 CONFIG_LOAPIC=y
-CONFIG_LOAPIC_TIMER=y
+CONFIG_APIC_TIMER=y
 CONFIG_X2APIC=y
 CONFIG_CONSOLE=y
 CONFIG_SERIAL=y

drivers/timer/CMakeLists.txt

@@ -4,7 +4,6 @@ zephyr_sources(                         sys_clock_init.c)
 zephyr_sources_ifdef(CONFIG_HPET_TIMER  hpet.c)
 zephyr_sources_ifdef(CONFIG_ARCV2_TIMER arcv2_timer0.c)
 zephyr_sources_ifdef(CONFIG_ARM_ARCH_TIMER arm_arch_timer.c)
-zephyr_sources_ifdef(CONFIG_LOAPIC_TIMER loapic_timer.c)
 zephyr_sources_ifdef(CONFIG_APIC_TIMER apic_timer.c)
 zephyr_sources_ifdef(CONFIG_ALTERA_AVALON_TIMER altera_avalon_timer_hal.c)
 zephyr_sources_ifdef(CONFIG_ITE_IT8XXX2_TIMER   ite_it8xxx2_timer.c)

drivers/timer/Kconfig

@@ -13,9 +13,7 @@ menuconfig APIC_TIMER
 	depends on LOAPIC
 	select TICKLESS_CAPABLE
 	help
-	  Use the "new" local APIC timer driver for the system timer.
-	  This is a replacement for the legacy local APIC timer driver
-	  which supports tickless operation, but not the Quark MVIC.
+	  Use the x86 local APIC as the system time source.
 
 if APIC_TIMER
 
@@ -64,36 +62,6 @@ config HPET_TIMER
 	  This option selects High Precision Event Timer (HPET) as a
 	  system timer.
 
-config LOAPIC_TIMER
-	bool "LOAPIC timer"
-	depends on LOAPIC && X86
-	help
-	  This option selects LOAPIC timer as a system timer.
-
-if LOAPIC_TIMER
-config LOAPIC_TIMER_IRQ
-	int "Local APIC Timer IRQ"
-	default 24
-	help
-	  This option specifies the IRQ used by the LOAPIC timer.
-
-config LOAPIC_TIMER_IRQ_PRIORITY
-	int "Local APIC Timer IRQ Priority"
-	default 2
-	help
-	  This options specifies the IRQ priority used by the LOAPIC timer.
-
-config TSC_CYCLES_PER_SEC
-	int "Frequency of x86 CPU timestamp counter"
-	default 0
-	help
-	  The x86 implementation of LOAPIC k_cycle_get_32() relies on the x86 TSC.
-	  This runs at the CPU speed and not the bus speed. If set to 0, the
-	  value of CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC will be used instead;
-	  many MCUs these values are the same.
-
-endif # LOAPIC_TIMER
-
 menuconfig ARCV2_TIMER
 	bool "ARC Timer"
 	default y