Merge tag 'metag_remove_2' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jhogan/metag into asm-generic

Remove metag architecture

These patches remove the metag architecture and tightly dependent
drivers from the kernel. With the 4.16 kernel the ancient gcc 4.2.4
based metag toolchain we have been using is hitting compiler bugs, so
now seems a good time to drop it altogether.

* tag 'metag_remove_2' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jhogan/metag:
  i2c: img-scb: Drop METAG dependency
  media: img-ir: Drop METAG dependency
  watchdog: imgpdc: Drop METAG dependency
  MAINTAINERS/CREDITS: Drop METAG ARCHITECTURE
  tty: Remove metag DA TTY and console driver
  clocksource: Remove metag generic timer driver
  irqchip: Remove metag irqchip drivers
  Drop a bunch of metag references
  docs: Remove remaining references to metag
  docs: Remove metag docs
  metag: Remove arch/metag/

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

3 files changed, 0 insertions, 167 deletions

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index b3b4ed9b6874..f99dbc2f7ee4 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -391,11 +391,6 @@ config ATMEL_ST
 	help
 	  Support for the Atmel ST timer.
 
-config CLKSRC_METAG_GENERIC
-	def_bool y if METAG
-	help
-	  This option enables support for the Meta per-thread timers.
-
 config CLKSRC_EXYNOS_MCT
 	bool "Exynos multi core timer driver" if COMPILE_TEST
 	depends on ARM || ARM64
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index d6dec4489d66..a2d47e9ecf91 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -61,7 +61,6 @@ obj-$(CONFIG_ARM_ARCH_TIMER)		+= arm_arch_timer.o
 obj-$(CONFIG_ARM_GLOBAL_TIMER)		+= arm_global_timer.o
 obj-$(CONFIG_ARMV7M_SYSTICK)		+= armv7m_systick.o
 obj-$(CONFIG_ARM_TIMER_SP804)		+= timer-sp804.o
-obj-$(CONFIG_CLKSRC_METAG_GENERIC)	+= metag_generic.o
 obj-$(CONFIG_ARCH_HAS_TICK_BROADCAST)	+= dummy_timer.o
 obj-$(CONFIG_KEYSTONE_TIMER)		+= timer-keystone.o
 obj-$(CONFIG_INTEGRATOR_AP_TIMER)	+= timer-integrator-ap.o
diff --git a/drivers/clocksource/metag_generic.c b/drivers/clocksource/metag_generic.c
deleted file mode 100644
index 3e5fa2f62d5f..000000000000
--- a/drivers/clocksource/metag_generic.c
+++ /dev/null
@@ -1,161 +0,0 @@
-/*
- * Copyright (C) 2005-2013 Imagination Technologies Ltd.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- *
- * Support for Meta per-thread timers.
- *
- * Meta hardware threads have 2 timers. The background timer (TXTIMER) is used
- * as a free-running time base (hz clocksource), and the interrupt timer
- * (TXTIMERI) is used for the timer interrupt (clock event). Both counters
- * traditionally count at approximately 1MHz.
- */
-
-#include <clocksource/metag_generic.h>
-#include <linux/cpu.h>
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/param.h>
-#include <linux/time.h>
-#include <linux/init.h>
-#include <linux/proc_fs.h>
-#include <linux/clocksource.h>
-#include <linux/clockchips.h>
-#include <linux/interrupt.h>
-
-#include <asm/clock.h>
-#include <asm/hwthread.h>
-#include <asm/core_reg.h>
-#include <asm/metag_mem.h>
-#include <asm/tbx.h>
-
-#define HARDWARE_FREQ		1000000	/* 1MHz */
-#define HARDWARE_DIV		1	/* divide by 1 = 1MHz clock */
-#define HARDWARE_TO_NS_SHIFT	10	/* convert ticks to ns */
-
-static unsigned int hwtimer_freq = HARDWARE_FREQ;
-static DEFINE_PER_CPU(struct clock_event_device, local_clockevent);
-static DEFINE_PER_CPU(char [11], local_clockevent_name);
-
-static int metag_timer_set_next_event(unsigned long delta,
-				      struct clock_event_device *dev)
-{
-	__core_reg_set(TXTIMERI, -delta);
-	return 0;
-}
-
-static u64 metag_clocksource_read(struct clocksource *cs)
-{
-	return __core_reg_get(TXTIMER);
-}
-
-static struct clocksource clocksource_metag = {
-	.name = "META",
-	.rating = 200,
-	.mask = CLOCKSOURCE_MASK(32),
-	.read = metag_clocksource_read,
-	.flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-static irqreturn_t metag_timer_interrupt(int irq, void *dummy)
-{
-	struct clock_event_device *evt = this_cpu_ptr(&local_clockevent);
-
-	evt->event_handler(evt);
-
-	return IRQ_HANDLED;
-}
-
-static struct irqaction metag_timer_irq = {
-	.name = "META core timer",
-	.handler = metag_timer_interrupt,
-	.flags = IRQF_TIMER | IRQF_IRQPOLL | IRQF_PERCPU,
-};
-
-unsigned long long sched_clock(void)
-{
-	unsigned long long ticks = __core_reg_get(TXTIMER);
-	return ticks << HARDWARE_TO_NS_SHIFT;
-}
-
-static int arch_timer_starting_cpu(unsigned int cpu)
-{
-	unsigned int txdivtime;
-	struct clock_event_device *clk = &per_cpu(local_clockevent, cpu);
-	char *name = per_cpu(local_clockevent_name, cpu);
-
-	txdivtime = __core_reg_get(TXDIVTIME);
-
-	txdivtime &= ~TXDIVTIME_DIV_BITS;
-	txdivtime |= (HARDWARE_DIV & TXDIVTIME_DIV_BITS);
-
-	__core_reg_set(TXDIVTIME, txdivtime);
-
-	sprintf(name, "META %d", cpu);
-	clk->name = name;
-	clk->features = CLOCK_EVT_FEAT_ONESHOT,
-
-	clk->rating = 200,
-	clk->shift = 12,
-	clk->irq = tbisig_map(TBID_SIGNUM_TRT),
-	clk->set_next_event = metag_timer_set_next_event,
-
-	clk->mult = div_sc(hwtimer_freq, NSEC_PER_SEC, clk->shift);
-	clk->max_delta_ns = clockevent_delta2ns(0x7fffffff, clk);
-	clk->max_delta_ticks = 0x7fffffff;
-	clk->min_delta_ns = clockevent_delta2ns(0xf, clk);
-	clk->min_delta_ticks = 0xf;
-	clk->cpumask = cpumask_of(cpu);
-
-	clockevents_register_device(clk);
-
-	/*
-	 * For all non-boot CPUs we need to synchronize our free
-	 * running clock (TXTIMER) with the boot CPU's clock.
-	 *
-	 * While this won't be accurate, it should be close enough.
-	 */
-	if (cpu) {
-		unsigned int thread0 = cpu_2_hwthread_id[0];
-		unsigned long val;
-
-		val = core_reg_read(TXUCT_ID, TXTIMER_REGNUM, thread0);
-		__core_reg_set(TXTIMER, val);
-	}
-	return 0;
-}
-
-int __init metag_generic_timer_init(void)
-{
-	/*
-	 * On Meta 2 SoCs, the actual frequency of the timer is based on the
-	 * Meta core clock speed divided by an integer, so it is only
-	 * approximately 1MHz. Calculating the real frequency here drastically
-	 * reduces clock skew on these SoCs.
-	 */
-#ifdef CONFIG_METAG_META21
-	hwtimer_freq = get_coreclock() / (metag_in32(EXPAND_TIMER_DIV) + 1);
-#endif
-	pr_info("Timer frequency: %u Hz\n", hwtimer_freq);
-
-	clocksource_register_hz(&clocksource_metag, hwtimer_freq);
-
-	setup_irq(tbisig_map(TBID_SIGNUM_TRT), &metag_timer_irq);
-
-	/* Hook cpu boot to configure the CPU's timers */
-	return cpuhp_setup_state(CPUHP_AP_METAG_TIMER_STARTING,
-				 "clockevents/metag:starting",
-				 arch_timer_starting_cpu, NULL);
-}