x86/apb_timer: Remove driver for deprecated platform

Intel Moorestown and Medfield are quite old Intel Atom based
32-bit platforms, which were in limited use in some Android phones,
tablets and consumer electronics more than eight years ago.

There are no bugs or problems ever reported outside from Intel
for breaking any of that platforms for years. It seems no real
users exists who run more or less fresh kernel on it. Commit
05f4434bc130 ("ASoC: Intel: remove mfld_machine") is also in align
with this theory.

Due to above and to reduce a burden of supporting outdated drivers,
remove the support for outdated platforms completely.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 3 insertions, 74 deletions

diff --git a/arch/x86/platform/intel-mid/intel-mid.c b/arch/x86/platform/intel-mid/intel-mid.c
index ada39fb426dd..864b0c158b2f 100644
--- a/arch/x86/platform/intel-mid/intel-mid.c
+++ b/arch/x86/platform/intel-mid/intel-mid.c
@@ -28,32 +28,8 @@
 #include <asm/io.h>
 #include <asm/i8259.h>
 #include <asm/intel_scu_ipc.h>
-#include <asm/apb_timer.h>
 #include <asm/reboot.h>
 
-/*
- * the clockevent devices on Moorestown/Medfield can be APBT or LAPIC clock,
- * cmdline option x86_intel_mid_timer can be used to override the configuration
- * to prefer one or the other.
- * at runtime, there are basically three timer configurations:
- * 1. per cpu apbt clock only
- * 2. per cpu always-on lapic clocks only, this is Penwell/Medfield only
- * 3. per cpu lapic clock (C3STOP) and one apbt clock, with broadcast.
- *
- * by default (without cmdline option), platform code first detects cpu type
- * to see if we are on lincroft or penwell, then set up both lapic or apbt
- * clocks accordingly.
- * i.e. by default, medfield uses configuration #2, moorestown uses #1.
- * config #3 is supported but not recommended on medfield.
- *
- * rating and feature summary:
- * lapic (with C3STOP) --------- 100
- * apbt (always-on) ------------ 110
- * lapic (always-on,ARAT) ------ 150
- */
-
-enum intel_mid_timer_options intel_mid_timer_options;
-
 enum intel_mid_cpu_type __intel_mid_cpu_chip;
 EXPORT_SYMBOL_GPL(__intel_mid_cpu_chip);
 
@@ -71,34 +47,11 @@ static void intel_mid_reboot(void)
 	intel_scu_ipc_simple_command(IPCMSG_COLD_RESET, 0);
 }
 
-static void __init intel_mid_setup_bp_timer(void)
-{
-	apbt_time_init();
-	setup_boot_APIC_clock();
-}
-
 static void __init intel_mid_time_init(void)
 {
-	sfi_table_parse(SFI_SIG_MTMR, NULL, NULL, sfi_parse_mtmr);
-
-	switch (intel_mid_timer_options) {
-	case INTEL_MID_TIMER_APBT_ONLY:
-		break;
-	case INTEL_MID_TIMER_LAPIC_APBT:
-		/* Use apbt and local apic */
-		x86_init.timers.setup_percpu_clockev = intel_mid_setup_bp_timer;
-		x86_cpuinit.setup_percpu_clockev = setup_secondary_APIC_clock;
-		return;
-	default:
-		if (!boot_cpu_has(X86_FEATURE_ARAT))
-			break;
-		/* Lapic only, no apbt */
-		x86_init.timers.setup_percpu_clockev = setup_boot_APIC_clock;
-		x86_cpuinit.setup_percpu_clockev = setup_secondary_APIC_clock;
-		return;
-	}
-
-	x86_init.timers.setup_percpu_clockev = apbt_time_init;
+	/* Lapic only, no apbt */
+	x86_init.timers.setup_percpu_clockev = setup_boot_APIC_clock;
+	x86_cpuinit.setup_percpu_clockev = setup_secondary_APIC_clock;
 }
 
 static void intel_mid_arch_setup(void)
@@ -163,8 +116,6 @@ void __init x86_intel_mid_early_setup(void)
 
 	x86_init.oem.arch_setup = intel_mid_arch_setup;
 
-	x86_cpuinit.setup_percpu_clockev = apbt_setup_secondary_clock;
-
 	x86_platform.get_nmi_reason = intel_mid_get_nmi_reason;
 
 	x86_init.pci.arch_init = intel_mid_pci_init;
@@ -186,25 +137,3 @@ void __init x86_intel_mid_early_setup(void)
 	x86_init.mpparse.get_smp_config = x86_init_uint_noop;
 	set_bit(MP_BUS_ISA, mp_bus_not_pci);
 }
-
-/*
- * if user does not want to use per CPU apb timer, just give it a lower rating
- * than local apic timer and skip the late per cpu timer init.
- */
-static inline int __init setup_x86_intel_mid_timer(char *arg)
-{
-	if (!arg)
-		return -EINVAL;
-
-	if (strcmp("apbt_only", arg) == 0)
-		intel_mid_timer_options = INTEL_MID_TIMER_APBT_ONLY;
-	else if (strcmp("lapic_and_apbt", arg) == 0)
-		intel_mid_timer_options = INTEL_MID_TIMER_LAPIC_APBT;
-	else {
-		pr_warn("X86 INTEL_MID timer option %s not recognised use x86_intel_mid_timer=apbt_only or lapic_and_apbt\n",
-			arg);
-		return -EINVAL;
-	}
-	return 0;
-}
-__setup("x86_intel_mid_timer=", setup_x86_intel_mid_timer);