irqchip: Remove metag irqchip drivers

Now that arch/metag/ has been removed, remove the two metag irqchip
drivers. They are of no value without the architecture code.
 - irq-metag: Meta internal (HWSTATMETA) interrupt code.
 - irq-metag-ext: Meta External interrupt code.

Signed-off-by: James Hogan <jhogan@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-metag@vger.kernel.org

3 files changed, 0 insertions, 1216 deletions

diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index d27e3e3619e0..b5b1f4c93413 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -15,8 +15,6 @@ obj-$(CONFIG_IRQ_MXS)			+= irq-mxs.o
 obj-$(CONFIG_ARCH_TEGRA)		+= irq-tegra.o
 obj-$(CONFIG_ARCH_S3C24XX)		+= irq-s3c24xx.o
 obj-$(CONFIG_DW_APB_ICTL)		+= irq-dw-apb-ictl.o
-obj-$(CONFIG_METAG)			+= irq-metag-ext.o
-obj-$(CONFIG_METAG_PERFCOUNTER_IRQS)	+= irq-metag.o
 obj-$(CONFIG_CLPS711X_IRQCHIP)		+= irq-clps711x.o
 obj-$(CONFIG_OMPIC)			+= irq-ompic.o
 obj-$(CONFIG_OR1K_PIC)			+= irq-or1k-pic.o
diff --git a/drivers/irqchip/irq-metag-ext.c b/drivers/irqchip/irq-metag-ext.c
deleted file mode 100644
index e67483161f0f..000000000000
--- a/drivers/irqchip/irq-metag-ext.c
+++ /dev/null
@@ -1,871 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Meta External interrupt code.
- *
- * Copyright (C) 2005-2012 Imagination Technologies Ltd.
- *
- * External interrupts on Meta are configured at two-levels, in the CPU core and
- * in the external trigger block. Interrupts from SoC peripherals are
- * multiplexed onto a single Meta CPU "trigger" - traditionally it has always
- * been trigger 2 (TR2). For info on how de-multiplexing happens check out
- * meta_intc_irq_demux().
- */
-
-#include <linux/interrupt.h>
-#include <linux/irqchip/metag-ext.h>
-#include <linux/irqdomain.h>
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/slab.h>
-#include <linux/syscore_ops.h>
-
-#include <asm/irq.h>
-#include <asm/hwthread.h>
-
-#define HWSTAT_STRIDE 8
-#define HWVEC_BLK_STRIDE 0x1000
-
-/**
- * struct meta_intc_priv - private meta external interrupt data
- * @nr_banks:		Number of interrupt banks
- * @domain:		IRQ domain for all banks of external IRQs
- * @unmasked:		Record of unmasked IRQs
- * @levels_altered:	Record of altered level bits
- */
-struct meta_intc_priv {
-	unsigned int		nr_banks;
-	struct irq_domain	*domain;
-
-	unsigned long		unmasked[4];
-
-#ifdef CONFIG_METAG_SUSPEND_MEM
-	unsigned long		levels_altered[4];
-#endif
-};
-
-/* Private data for the one and only external interrupt controller */
-static struct meta_intc_priv meta_intc_priv;
-
-/**
- * meta_intc_offset() - Get the offset into the bank of a hardware IRQ number
- * @hw:		Hardware IRQ number (within external trigger block)
- *
- * Returns:	Bit offset into the IRQ's bank registers
- */
-static unsigned int meta_intc_offset(irq_hw_number_t hw)
-{
-	return hw & 0x1f;
-}
-
-/**
- * meta_intc_bank() - Get the bank number of a hardware IRQ number
- * @hw:		Hardware IRQ number (within external trigger block)
- *
- * Returns:	Bank number indicating which register the IRQ's bits are
- */
-static unsigned int meta_intc_bank(irq_hw_number_t hw)
-{
-	return hw >> 5;
-}
-
-/**
- * meta_intc_stat_addr() - Get the address of a HWSTATEXT register
- * @hw:		Hardware IRQ number (within external trigger block)
- *
- * Returns:	Address of a HWSTATEXT register containing the status bit for
- *		the specified hardware IRQ number
- */
-static void __iomem *meta_intc_stat_addr(irq_hw_number_t hw)
-{
-	return (void __iomem *)(HWSTATEXT +
-				HWSTAT_STRIDE * meta_intc_bank(hw));
-}
-
-/**
- * meta_intc_level_addr() - Get the address of a HWLEVELEXT register
- * @hw:		Hardware IRQ number (within external trigger block)
- *
- * Returns:	Address of a HWLEVELEXT register containing the sense bit for
- *		the specified hardware IRQ number
- */
-static void __iomem *meta_intc_level_addr(irq_hw_number_t hw)
-{
-	return (void __iomem *)(HWLEVELEXT +
-				HWSTAT_STRIDE * meta_intc_bank(hw));
-}
-
-/**
- * meta_intc_mask_addr() - Get the address of a HWMASKEXT register
- * @hw:		Hardware IRQ number (within external trigger block)
- *
- * Returns:	Address of a HWMASKEXT register containing the mask bit for the
- *		specified hardware IRQ number
- */
-static void __iomem *meta_intc_mask_addr(irq_hw_number_t hw)
-{
-	return (void __iomem *)(HWMASKEXT +
-				HWSTAT_STRIDE * meta_intc_bank(hw));
-}
-
-/**
- * meta_intc_vec_addr() - Get the vector address of a hardware interrupt
- * @hw:		Hardware IRQ number (within external trigger block)
- *
- * Returns:	Address of a HWVECEXT register controlling the core trigger to
- *		vector the IRQ onto
- */
-static inline void __iomem *meta_intc_vec_addr(irq_hw_number_t hw)
-{
-	return (void __iomem *)(HWVEC0EXT +
-				HWVEC_BLK_STRIDE * meta_intc_bank(hw) +
-				HWVECnEXT_STRIDE * meta_intc_offset(hw));
-}
-
-/**
- * meta_intc_startup_irq() - set up an external irq
- * @data:	data for the external irq to start up
- *
- * Multiplex interrupts for irq onto TR2. Clear any pending interrupts and
- * unmask irq, both using the appropriate callbacks.
- */
-static unsigned int meta_intc_startup_irq(struct irq_data *data)
-{
-	irq_hw_number_t hw = data->hwirq;
-	void __iomem *vec_addr = meta_intc_vec_addr(hw);
-	int thread = hard_processor_id();
-
-	/* Perform any necessary acking. */
-	if (data->chip->irq_ack)
-		data->chip->irq_ack(data);
-
-	/* Wire up this interrupt to the core with HWVECxEXT. */
-	metag_out32(TBI_TRIG_VEC(TBID_SIGNUM_TR2(thread)), vec_addr);
-
-	/* Perform any necessary unmasking. */
-	data->chip->irq_unmask(data);
-
-	return 0;
-}
-
-/**
- * meta_intc_shutdown_irq() - turn off an external irq
- * @data:	data for the external irq to turn off
- *
- * Mask irq using the appropriate callback and stop muxing it onto TR2.
- */
-static void meta_intc_shutdown_irq(struct irq_data *data)
-{
-	irq_hw_number_t hw = data->hwirq;
-	void __iomem *vec_addr = meta_intc_vec_addr(hw);
-
-	/* Mask the IRQ */
-	data->chip->irq_mask(data);
-
-	/*
-	 * Disable the IRQ at the core by removing the interrupt from
-	 * the HW vector mapping.
-	 */
-	metag_out32(0, vec_addr);
-}
-
-/**
- * meta_intc_ack_irq() - acknowledge an external irq
- * @data:	data for the external irq to ack
- *
- * Clear down an edge interrupt in the status register.
- */
-static void meta_intc_ack_irq(struct irq_data *data)
-{
-	irq_hw_number_t hw = data->hwirq;
-	unsigned int bit = 1 << meta_intc_offset(hw);
-	void __iomem *stat_addr = meta_intc_stat_addr(hw);
-
-	/* Ack the int, if it is still 'on'.
-	 * NOTE - this only works for edge triggered interrupts.
-	 */
-	if (metag_in32(stat_addr) & bit)
-		metag_out32(bit, stat_addr);
-}
-
-/**
- * record_irq_is_masked() - record the IRQ masked so it doesn't get handled
- * @data:	data for the external irq to record
- *
- * This should get called whenever an external IRQ is masked (by whichever
- * callback is used). It records the IRQ masked so that it doesn't get handled
- * if it still shows up in the status register.
- */
-static void record_irq_is_masked(struct irq_data *data)
-{
-	struct meta_intc_priv *priv = &meta_intc_priv;
-	irq_hw_number_t hw = data->hwirq;
-
-	clear_bit(meta_intc_offset(hw), &priv->unmasked[meta_intc_bank(hw)]);
-}
-
-/**
- * record_irq_is_unmasked() - record the IRQ unmasked so it can be handled
- * @data:	data for the external irq to record
- *
- * This should get called whenever an external IRQ is unmasked (by whichever
- * callback is used). It records the IRQ unmasked so that it gets handled if it
- * shows up in the status register.
- */
-static void record_irq_is_unmasked(struct irq_data *data)
-{
-	struct meta_intc_priv *priv = &meta_intc_priv;
-	irq_hw_number_t hw = data->hwirq;
-
-	set_bit(meta_intc_offset(hw), &priv->unmasked[meta_intc_bank(hw)]);
-}
-
-/*
- * For use by wrapper IRQ drivers
- */
-
-/**
- * meta_intc_mask_irq_simple() - minimal mask used by wrapper IRQ drivers
- * @data:	data for the external irq being masked
- *
- * This should be called by any wrapper IRQ driver mask functions. it doesn't do
- * any masking but records the IRQ as masked so that the core code knows the
- * mask has taken place. It is the callers responsibility to ensure that the IRQ
- * won't trigger an interrupt to the core.
- */
-void meta_intc_mask_irq_simple(struct irq_data *data)
-{
-	record_irq_is_masked(data);
-}
-
-/**
- * meta_intc_unmask_irq_simple() - minimal unmask used by wrapper IRQ drivers
- * @data:	data for the external irq being unmasked
- *
- * This should be called by any wrapper IRQ driver unmask functions. it doesn't
- * do any unmasking but records the IRQ as unmasked so that the core code knows
- * the unmask has taken place. It is the callers responsibility to ensure that
- * the IRQ can now trigger an interrupt to the core.
- */
-void meta_intc_unmask_irq_simple(struct irq_data *data)
-{
-	record_irq_is_unmasked(data);
-}
-
-
-/**
- * meta_intc_mask_irq() - mask an external irq using HWMASKEXT
- * @data:	data for the external irq to mask
- *
- * This is a default implementation of a mask function which makes use of the
- * HWMASKEXT registers available in newer versions.
- *
- * Earlier versions without these registers should use SoC level IRQ masking
- * which call the meta_intc_*_simple() functions above, or if that isn't
- * available should use the fallback meta_intc_*_nomask() functions below.
- */
-static void meta_intc_mask_irq(struct irq_data *data)
-{
-	irq_hw_number_t hw = data->hwirq;
-	unsigned int bit = 1 << meta_intc_offset(hw);
-	void __iomem *mask_addr = meta_intc_mask_addr(hw);
-	unsigned long flags;
-
-	record_irq_is_masked(data);
-
-	/* update the interrupt mask */
-	__global_lock2(flags);
-	metag_out32(metag_in32(mask_addr) & ~bit, mask_addr);
-	__global_unlock2(flags);
-}
-
-/**
- * meta_intc_unmask_irq() - unmask an external irq using HWMASKEXT
- * @data:	data for the external irq to unmask
- *
- * This is a default implementation of an unmask function which makes use of the
- * HWMASKEXT registers available on new versions. It should be paired with
- * meta_intc_mask_irq() above.
- */
-static void meta_intc_unmask_irq(struct irq_data *data)
-{
-	irq_hw_number_t hw = data->hwirq;
-	unsigned int bit = 1 << meta_intc_offset(hw);
-	void __iomem *mask_addr = meta_intc_mask_addr(hw);
-	unsigned long flags;
-
-	record_irq_is_unmasked(data);
-
-	/* update the interrupt mask */
-	__global_lock2(flags);
-	metag_out32(metag_in32(mask_addr) | bit, mask_addr);
-	__global_unlock2(flags);
-}
-
-/**
- * meta_intc_mask_irq_nomask() - mask an external irq by unvectoring
- * @data:	data for the external irq to mask
- *
- * This is the version of the mask function for older versions which don't have
- * HWMASKEXT registers, or a SoC level means of masking IRQs. Instead the IRQ is
- * unvectored from the core and retriggered if necessary later.
- */
-static void meta_intc_mask_irq_nomask(struct irq_data *data)
-{
-	irq_hw_number_t hw = data->hwirq;
-	void __iomem *vec_addr = meta_intc_vec_addr(hw);
-
-	record_irq_is_masked(data);
-
-	/* there is no interrupt mask, so unvector the interrupt */
-	metag_out32(0, vec_addr);
-}
-
-/**
- * meta_intc_unmask_edge_irq_nomask() - unmask an edge irq by revectoring
- * @data:	data for the external irq to unmask
- *
- * This is the version of the unmask function for older versions which don't
- * have HWMASKEXT registers, or a SoC level means of masking IRQs. Instead the
- * IRQ is revectored back to the core and retriggered if necessary.
- *
- * The retriggering done by this function is specific to edge interrupts.
- */
-static void meta_intc_unmask_edge_irq_nomask(struct irq_data *data)
-{
-	irq_hw_number_t hw = data->hwirq;
-	unsigned int bit = 1 << meta_intc_offset(hw);
-	void __iomem *stat_addr = meta_intc_stat_addr(hw);
-	void __iomem *vec_addr = meta_intc_vec_addr(hw);
-	unsigned int thread = hard_processor_id();
-
-	record_irq_is_unmasked(data);
-
-	/* there is no interrupt mask, so revector the interrupt */
-	metag_out32(TBI_TRIG_VEC(TBID_SIGNUM_TR2(thread)), vec_addr);
-
-	/*
-	 * Re-trigger interrupt
-	 *
-	 * Writing a 1 toggles, and a 0->1 transition triggers. We only
-	 * retrigger if the status bit is already set, which means we
-	 * need to clear it first. Retriggering is fundamentally racy
-	 * because if the interrupt fires again after we clear it we
-	 * could end up clearing it again and the interrupt handler
-	 * thinking it hasn't fired. Therefore we need to keep trying to
-	 * retrigger until the bit is set.
-	 */
-	if (metag_in32(stat_addr) & bit) {
-		metag_out32(bit, stat_addr);
-		while (!(metag_in32(stat_addr) & bit))
-			metag_out32(bit, stat_addr);
-	}
-}
-
-/**
- * meta_intc_unmask_level_irq_nomask() - unmask a level irq by revectoring
- * @data:	data for the external irq to unmask
- *
- * This is the version of the unmask function for older versions which don't
- * have HWMASKEXT registers, or a SoC level means of masking IRQs. Instead the
- * IRQ is revectored back to the core and retriggered if necessary.
- *
- * The retriggering done by this function is specific to level interrupts.
- */
-static void meta_intc_unmask_level_irq_nomask(struct irq_data *data)
-{
-	irq_hw_number_t hw = data->hwirq;
-	unsigned int bit = 1 << meta_intc_offset(hw);
-	void __iomem *stat_addr = meta_intc_stat_addr(hw);
-	void __iomem *vec_addr = meta_intc_vec_addr(hw);
-	unsigned int thread = hard_processor_id();
-
-	record_irq_is_unmasked(data);
-
-	/* there is no interrupt mask, so revector the interrupt */
-	metag_out32(TBI_TRIG_VEC(TBID_SIGNUM_TR2(thread)), vec_addr);
-
-	/* Re-trigger interrupt */
-	/* Writing a 1 triggers interrupt */
-	if (metag_in32(stat_addr) & bit)
-		metag_out32(bit, stat_addr);
-}
-
-/**
- * meta_intc_irq_set_type() - set the type of an external irq
- * @data:	data for the external irq to set the type of
- * @flow_type:	new irq flow type
- *
- * Set the flow type of an external interrupt. This updates the irq chip and irq
- * handler depending on whether the irq is edge or level sensitive (the polarity
- * is ignored), and also sets up the bit in HWLEVELEXT so the hardware knows
- * when to trigger.
- */
-static int meta_intc_irq_set_type(struct irq_data *data, unsigned int flow_type)
-{
-#ifdef CONFIG_METAG_SUSPEND_MEM
-	struct meta_intc_priv *priv = &meta_intc_priv;
-#endif
-	irq_hw_number_t hw = data->hwirq;
-	unsigned int bit = 1 << meta_intc_offset(hw);
-	void __iomem *level_addr = meta_intc_level_addr(hw);
-	unsigned long flags;
-	unsigned int level;
-
-	/* update the chip/handler */
-	if (flow_type & IRQ_TYPE_LEVEL_MASK)
-		irq_set_chip_handler_name_locked(data, &meta_intc_level_chip,
-						 handle_level_irq, NULL);
-	else
-		irq_set_chip_handler_name_locked(data, &meta_intc_edge_chip,
-						 handle_edge_irq, NULL);
-
-	/* and clear/set the bit in HWLEVELEXT */
-	__global_lock2(flags);
-	level = metag_in32(level_addr);
-	if (flow_type & IRQ_TYPE_LEVEL_MASK)
-		level |= bit;
-	else
-		level &= ~bit;
-	metag_out32(level, level_addr);
-#ifdef CONFIG_METAG_SUSPEND_MEM
-	priv->levels_altered[meta_intc_bank(hw)] |= bit;
-#endif
-	__global_unlock2(flags);
-
-	return 0;
-}
-
-/**
- * meta_intc_irq_demux() - external irq de-multiplexer
- * @desc:	the interrupt description structure for this irq
- *
- * The cpu receives an interrupt on TR2 when a SoC interrupt has occurred. It is
- * this function's job to demux this irq and figure out exactly which external
- * irq needs servicing.
- *
- * Whilst using TR2 to detect external interrupts is a software convention it is
- * (hopefully) unlikely to change.
- */
-static void meta_intc_irq_demux(struct irq_desc *desc)
-{
-	struct meta_intc_priv *priv = &meta_intc_priv;
-	irq_hw_number_t hw;
-	unsigned int bank, irq_no, status;
-	void __iomem *stat_addr = meta_intc_stat_addr(0);
-
-	/*
-	 * Locate which interrupt has caused our handler to run.
-	 */
-	for (bank = 0; bank < priv->nr_banks; ++bank) {
-		/* Which interrupts are currently pending in this bank? */
-recalculate:
-		status = metag_in32(stat_addr) & priv->unmasked[bank];
-
-		for (hw = bank*32; status; status >>= 1, ++hw) {
-			if (status & 0x1) {
-				/*
-				 * Map the hardware IRQ number to a virtual
-				 * Linux IRQ number.
-				 */
-				irq_no = irq_linear_revmap(priv->domain, hw);
-
-				/*
-				 * Only fire off external interrupts that are
-				 * registered to be handled by the kernel.
-				 * Other external interrupts are probably being
-				 * handled by other Meta hardware threads.
-				 */
-				generic_handle_irq(irq_no);
-
-				/*
-				 * The handler may have re-enabled interrupts
-				 * which could have caused a nested invocation
-				 * of this code and make the copy of the
-				 * status register we are using invalid.
-				 */
-				goto recalculate;
-			}
-		}
-		stat_addr += HWSTAT_STRIDE;
-	}
-}
-
-#ifdef CONFIG_SMP
-/**
- * meta_intc_set_affinity() - set the affinity for an interrupt
- * @data:	data for the external irq to set the affinity of
- * @cpumask:	cpu mask representing cpus which can handle the interrupt
- * @force:	whether to force (ignored)
- *
- * Revector the specified external irq onto a specific cpu's TR2 trigger, so
- * that that cpu tends to be the one who handles it.
- */
-static int meta_intc_set_affinity(struct irq_data *data,
-				  const struct cpumask *cpumask, bool force)
-{
-	irq_hw_number_t hw = data->hwirq;
-	void __iomem *vec_addr = meta_intc_vec_addr(hw);
-	unsigned int cpu, thread;
-
-	/*
-	 * Wire up this interrupt from HWVECxEXT to the Meta core.
-	 *
-	 * Note that we can't wire up HWVECxEXT to interrupt more than
-	 * one cpu (the interrupt code doesn't support it), so we just
-	 * pick the first cpu we find in 'cpumask'.
-	 */
-	cpu = cpumask_any_and(cpumask, cpu_online_mask);
-	thread = cpu_2_hwthread_id[cpu];
-
-	metag_out32(TBI_TRIG_VEC(TBID_SIGNUM_TR2(thread)), vec_addr);
-
-	irq_data_update_effective_affinity(data, cpumask_of(cpu));
-
-	return 0;
-}
-#else
-#define meta_intc_set_affinity	NULL
-#endif
-
-#ifdef CONFIG_PM_SLEEP
-#define META_INTC_CHIP_FLAGS	(IRQCHIP_MASK_ON_SUSPEND \
-				| IRQCHIP_SKIP_SET_WAKE)
-#else
-#define META_INTC_CHIP_FLAGS	0
-#endif
-
-/* public edge/level irq chips which SoCs can override */
-
-struct irq_chip meta_intc_edge_chip = {
-	.irq_startup		= meta_intc_startup_irq,
-	.irq_shutdown		= meta_intc_shutdown_irq,
-	.irq_ack		= meta_intc_ack_irq,
-	.irq_mask		= meta_intc_mask_irq,
-	.irq_unmask		= meta_intc_unmask_irq,
-	.irq_set_type		= meta_intc_irq_set_type,
-	.irq_set_affinity	= meta_intc_set_affinity,
-	.flags			= META_INTC_CHIP_FLAGS,
-};
-
-struct irq_chip meta_intc_level_chip = {
-	.irq_startup		= meta_intc_startup_irq,
-	.irq_shutdown		= meta_intc_shutdown_irq,
-	.irq_set_type		= meta_intc_irq_set_type,
-	.irq_mask		= meta_intc_mask_irq,
-	.irq_unmask		= meta_intc_unmask_irq,
-	.irq_set_affinity	= meta_intc_set_affinity,
-	.flags			= META_INTC_CHIP_FLAGS,
-};
-
-/**
- * meta_intc_map() - map an external irq
- * @d:		irq domain of external trigger block
- * @irq:	virtual irq number
- * @hw:		hardware irq number within external trigger block
- *
- * This sets up a virtual irq for a specified hardware interrupt. The irq chip
- * and handler is configured, using the HWLEVELEXT registers to determine
- * edge/level flow type. These registers will have been set when the irq type is
- * set (or set to a default at init time).
- */
-static int meta_intc_map(struct irq_domain *d, unsigned int irq,
-			 irq_hw_number_t hw)
-{
-	unsigned int bit = 1 << meta_intc_offset(hw);
-	void __iomem *level_addr = meta_intc_level_addr(hw);
-
-	/* Go by the current sense in the HWLEVELEXT register */
-	if (metag_in32(level_addr) & bit)
-		irq_set_chip_and_handler(irq, &meta_intc_level_chip,
-					 handle_level_irq);
-	else
-		irq_set_chip_and_handler(irq, &meta_intc_edge_chip,
-					 handle_edge_irq);
-
-	irqd_set_single_target(irq_desc_get_irq_data(irq_to_desc(irq)));
-	return 0;
-}
-
-static const struct irq_domain_ops meta_intc_domain_ops = {
-	.map = meta_intc_map,
-	.xlate = irq_domain_xlate_twocell,
-};
-
-#ifdef CONFIG_METAG_SUSPEND_MEM
-
-/**
- * struct meta_intc_context - suspend context
- * @levels:	State of HWLEVELEXT registers
- * @masks:	State of HWMASKEXT registers
- * @vectors:	State of HWVECEXT registers
- * @txvecint:	State of TxVECINT registers
- *
- * This structure stores the IRQ state across suspend.
- */
-struct meta_intc_context {
-	u32 levels[4];
-	u32 masks[4];
-	u8 vectors[4*32];
-
-	u8 txvecint[4][4];
-};
-
-/* suspend context */
-static struct meta_intc_context *meta_intc_context;
-
-/**
- * meta_intc_suspend() - store irq state
- *
- * To avoid interfering with other threads we only save the IRQ state of IRQs in
- * use by Linux.
- */
-static int meta_intc_suspend(void)
-{
-	struct meta_intc_priv *priv = &meta_intc_priv;
-	int i, j;
-	irq_hw_number_t hw;
-	unsigned int bank;
-	unsigned long flags;
-	struct meta_intc_context *context;
-	void __iomem *level_addr, *mask_addr, *vec_addr;
-	u32 mask, bit;
-
-	context = kzalloc(sizeof(*context), GFP_ATOMIC);
-	if (!context)
-		return -ENOMEM;
-
-	hw = 0;
-	level_addr = meta_intc_level_addr(0);
-	mask_addr = meta_intc_mask_addr(0);
-	for (bank = 0; bank < priv->nr_banks; ++bank) {
-		vec_addr = meta_intc_vec_addr(hw);
-
-		/* create mask of interrupts in use */
-		mask = 0;
-		for (bit = 1; bit; bit <<= 1) {
-			i = irq_linear_revmap(priv->domain, hw);
-			/* save mapped irqs which are enabled or have actions */
-			if (i && (!irqd_irq_disabled(irq_get_irq_data(i)) ||
-				  irq_has_action(i))) {
-				mask |= bit;
-
-				/* save trigger vector */
-				context->vectors[hw] = metag_in32(vec_addr);
-			}
-
-			++hw;
-			vec_addr += HWVECnEXT_STRIDE;
-		}
-
-		/* save level state if any IRQ levels altered */
-		if (priv->levels_altered[bank])
-			context->levels[bank] = metag_in32(level_addr);
-		/* save mask state if any IRQs in use */
-		if (mask)
-			context->masks[bank] = metag_in32(mask_addr);
-
-		level_addr += HWSTAT_STRIDE;
-		mask_addr += HWSTAT_STRIDE;
-	}
-
-	/* save trigger matrixing */
-	__global_lock2(flags);
-	for (i = 0; i < 4; ++i)
-		for (j = 0; j < 4; ++j)
-			context->txvecint[i][j] = metag_in32(T0VECINT_BHALT +
-							     TnVECINT_STRIDE*i +
-							     8*j);
-	__global_unlock2(flags);
-
-	meta_intc_context = context;
-	return 0;
-}
-
-/**
- * meta_intc_resume() - restore saved irq state
- *
- * Restore the saved IRQ state and drop it.
- */
-static void meta_intc_resume(void)
-{
-	struct meta_intc_priv *priv = &meta_intc_priv;
-	int i, j;
-	irq_hw_number_t hw;
-	unsigned int bank;
-	unsigned long flags;
-	struct meta_intc_context *context = meta_intc_context;
-	void __iomem *level_addr, *mask_addr, *vec_addr;
-	u32 mask, bit, tmp;
-
-	meta_intc_context = NULL;
-
-	hw = 0;
-	level_addr = meta_intc_level_addr(0);
-	mask_addr = meta_intc_mask_addr(0);
-	for (bank = 0; bank < priv->nr_banks; ++bank) {
-		vec_addr = meta_intc_vec_addr(hw);
-
-		/* create mask of interrupts in use */
-		mask = 0;
-		for (bit = 1; bit; bit <<= 1) {
-			i = irq_linear_revmap(priv->domain, hw);
-			/* restore mapped irqs, enabled or with actions */
-			if (i && (!irqd_irq_disabled(irq_get_irq_data(i)) ||
-				  irq_has_action(i))) {
-				mask |= bit;
-
-				/* restore trigger vector */
-				metag_out32(context->vectors[hw], vec_addr);
-			}
-
-			++hw;
-			vec_addr += HWVECnEXT_STRIDE;
-		}
-
-		if (mask) {
-			/* restore mask state */
-			__global_lock2(flags);
-			tmp = metag_in32(mask_addr);
-			tmp = (tmp & ~mask) | (context->masks[bank] & mask);
-			metag_out32(tmp, mask_addr);
-			__global_unlock2(flags);
-		}
-
-		mask = priv->levels_altered[bank];
-		if (mask) {
-			/* restore level state */
-			__global_lock2(flags);
-			tmp = metag_in32(level_addr);
-			tmp = (tmp & ~mask) | (context->levels[bank] & mask);
-			metag_out32(tmp, level_addr);
-			__global_unlock2(flags);
-		}
-
-		level_addr += HWSTAT_STRIDE;
-		mask_addr += HWSTAT_STRIDE;
-	}
-
-	/* restore trigger matrixing */
-	__global_lock2(flags);
-	for (i = 0; i < 4; ++i) {
-		for (j = 0; j < 4; ++j) {
-			metag_out32(context->txvecint[i][j],
-				    T0VECINT_BHALT +
-				    TnVECINT_STRIDE*i +
-				    8*j);
-		}
-	}
-	__global_unlock2(flags);
-
-	kfree(context);
-}
-
-static struct syscore_ops meta_intc_syscore_ops = {
-	.suspend = meta_intc_suspend,
-	.resume = meta_intc_resume,
-};
-
-static void __init meta_intc_init_syscore_ops(struct meta_intc_priv *priv)
-{
-	register_syscore_ops(&meta_intc_syscore_ops);
-}
-#else
-#define meta_intc_init_syscore_ops(priv) do {} while (0)
-#endif
-
-/**
- * meta_intc_init_cpu() - register with a Meta cpu
- * @priv:	private interrupt controller data
- * @cpu:	the CPU to register on
- *
- * Configure @cpu's TR2 irq so that we can demux external irqs.
- */
-static void __init meta_intc_init_cpu(struct meta_intc_priv *priv, int cpu)
-{
-	unsigned int thread = cpu_2_hwthread_id[cpu];
-	unsigned int signum = TBID_SIGNUM_TR2(thread);
-	int irq = tbisig_map(signum);
-
-	/* Register the multiplexed IRQ handler */
-	irq_set_chained_handler(irq, meta_intc_irq_demux);
-	irq_set_irq_type(irq, IRQ_TYPE_LEVEL_LOW);
-}
-
-/**
- * meta_intc_no_mask() - indicate lack of HWMASKEXT registers
- *
- * Called from SoC code (or init code below) to dynamically indicate the lack of
- * HWMASKEXT registers (for example depending on some SoC revision register).
- * This alters the irq mask and unmask callbacks to use the fallback
- * unvectoring/retriggering technique instead of using HWMASKEXT registers.
- */
-void __init meta_intc_no_mask(void)
-{
-	meta_intc_edge_chip.irq_mask	= meta_intc_mask_irq_nomask;
-	meta_intc_edge_chip.irq_unmask	= meta_intc_unmask_edge_irq_nomask;
-	meta_intc_level_chip.irq_mask	= meta_intc_mask_irq_nomask;
-	meta_intc_level_chip.irq_unmask	= meta_intc_unmask_level_irq_nomask;
-}
-
-/**
- * init_external_IRQ() - initialise the external irq controller
- *
- * Set up the external irq controller using device tree properties. This is
- * called from init_IRQ().
- */
-int __init init_external_IRQ(void)
-{
-	struct meta_intc_priv *priv = &meta_intc_priv;
-	struct device_node *node;
-	int ret, cpu;
-	u32 val;
-	bool no_masks = false;
-
-	node = of_find_compatible_node(NULL, NULL, "img,meta-intc");
-	if (!node)
-		return -ENOENT;
-
-	/* Get number of banks */
-	ret = of_property_read_u32(node, "num-banks", &val);
-	if (ret) {
-		pr_err("meta-intc: No num-banks property found\n");
-		return ret;
-	}
-	if (val < 1 || val > 4) {
-		pr_err("meta-intc: num-banks (%u) out of range\n", val);
-		return -EINVAL;
-	}
-	priv->nr_banks = val;
-
-	/* Are any mask registers present? */
-	if (of_get_property(node, "no-mask", NULL))
-		no_masks = true;
-
-	/* No HWMASKEXT registers present? */
-	if (no_masks)
-		meta_intc_no_mask();
-
-	/* Set up an IRQ domain */
-	/*
-	 * This is a legacy IRQ domain for now until all the platform setup code
-	 * has been converted to devicetree.
-	 */
-	priv->domain = irq_domain_add_linear(node, priv->nr_banks*32,
-					     &meta_intc_domain_ops, priv);
-	if (unlikely(!priv->domain)) {
-		pr_err("meta-intc: cannot add IRQ domain\n");
-		return -ENOMEM;
-	}
-
-	/* Setup TR2 for all cpus. */
-	for_each_possible_cpu(cpu)
-		meta_intc_init_cpu(priv, cpu);
-
-	/* Set up system suspend/resume callbacks */
-	meta_intc_init_syscore_ops(priv);
-
-	pr_info("meta-intc: External IRQ controller initialised (%u IRQs)\n",
-		priv->nr_banks*32);
-
-	return 0;
-}
diff --git a/drivers/irqchip/irq-metag.c b/drivers/irqchip/irq-metag.c
deleted file mode 100644
index 857b946747eb..000000000000
--- a/drivers/irqchip/irq-metag.c
+++ /dev/null
@@ -1,343 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Meta internal (HWSTATMETA) interrupt code.
- *
- * Copyright (C) 2011-2012 Imagination Technologies Ltd.
- *
- * This code is based on the code in SoC/common/irq.c and SoC/comet/irq.c
- * The code base could be generalised/merged as a lot of the functionality is
- * similar. Until this is done, we try to keep the code simple here.
- */
-
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/irqdomain.h>
-
-#include <asm/irq.h>
-#include <asm/hwthread.h>
-
-#define PERF0VECINT		0x04820580
-#define PERF1VECINT		0x04820588
-#define PERF0TRIG_OFFSET	16
-#define PERF1TRIG_OFFSET	17
-
-/**
- * struct metag_internal_irq_priv - private meta internal interrupt data
- * @domain:		IRQ domain for all internal Meta IRQs (HWSTATMETA)
- * @unmasked:		Record of unmasked IRQs
- */
-struct metag_internal_irq_priv {
-	struct irq_domain	*domain;
-
-	unsigned long		unmasked;
-};
-
-/* Private data for the one and only internal interrupt controller */
-static struct metag_internal_irq_priv metag_internal_irq_priv;
-
-static unsigned int metag_internal_irq_startup(struct irq_data *data);
-static void metag_internal_irq_shutdown(struct irq_data *data);
-static void metag_internal_irq_ack(struct irq_data *data);
-static void metag_internal_irq_mask(struct irq_data *data);
-static void metag_internal_irq_unmask(struct irq_data *data);
-#ifdef CONFIG_SMP
-static int metag_internal_irq_set_affinity(struct irq_data *data,
-			const struct cpumask *cpumask, bool force);
-#endif
-
-static struct irq_chip internal_irq_edge_chip = {
-	.name = "HWSTATMETA-IRQ",
-	.irq_startup = metag_internal_irq_startup,
-	.irq_shutdown = metag_internal_irq_shutdown,
-	.irq_ack = metag_internal_irq_ack,
-	.irq_mask = metag_internal_irq_mask,
-	.irq_unmask = metag_internal_irq_unmask,
-#ifdef CONFIG_SMP
-	.irq_set_affinity = metag_internal_irq_set_affinity,
-#endif
-};
-
-/*
- *	metag_hwvec_addr - get the address of *VECINT regs of irq
- *
- *	This function is a table of supported triggers on HWSTATMETA
- *	Could do with a structure, but better keep it simple. Changes
- *	in this code should be rare.
- */
-static inline void __iomem *metag_hwvec_addr(irq_hw_number_t hw)
-{
-	void __iomem *addr;
-
-	switch (hw) {
-	case PERF0TRIG_OFFSET:
-		addr = (void __iomem *)PERF0VECINT;
-		break;
-	case PERF1TRIG_OFFSET:
-		addr = (void __iomem *)PERF1VECINT;
-		break;
-	default:
-		addr = NULL;
-		break;
-	}
-	return addr;
-}
-
-/*
- *	metag_internal_startup - setup an internal irq
- *	@irq:	the irq to startup
- *
- *	Multiplex interrupts for @irq onto TR1. Clear any pending
- *	interrupts.
- */
-static unsigned int metag_internal_irq_startup(struct irq_data *data)
-{
-	/* Clear (toggle) the bit in HWSTATMETA for our interrupt. */
-	metag_internal_irq_ack(data);
-
-	/* Enable the interrupt by unmasking it */
-	metag_internal_irq_unmask(data);
-
-	return 0;
-}
-
-/*
- *	metag_internal_irq_shutdown - turn off the irq
- *	@irq:	the irq number to turn off
- *
- *	Mask @irq and clear any pending interrupts.
- *	Stop muxing @irq onto TR1.
- */
-static void metag_internal_irq_shutdown(struct irq_data *data)
-{
-	/* Disable the IRQ at the core by masking it. */
-	metag_internal_irq_mask(data);
-
-	/* Clear (toggle) the bit in HWSTATMETA for our interrupt. */
-	metag_internal_irq_ack(data);
-}
-
-/*
- *	metag_internal_irq_ack - acknowledge irq
- *	@irq:	the irq to ack
- */
-static void metag_internal_irq_ack(struct irq_data *data)
-{
-	irq_hw_number_t hw = data->hwirq;
-	unsigned int bit = 1 << hw;
-
-	if (metag_in32(HWSTATMETA) & bit)
-		metag_out32(bit, HWSTATMETA);
-}
-
-/**
- * metag_internal_irq_mask() - mask an internal irq by unvectoring
- * @data:	data for the internal irq to mask
- *
- * HWSTATMETA has no mask register. Instead the IRQ is unvectored from the core
- * and retriggered if necessary later.
- */
-static void metag_internal_irq_mask(struct irq_data *data)
-{
-	struct metag_internal_irq_priv *priv = &metag_internal_irq_priv;
-	irq_hw_number_t hw = data->hwirq;
-	void __iomem *vec_addr = metag_hwvec_addr(hw);
-
-	clear_bit(hw, &priv->unmasked);
-
-	/* there is no interrupt mask, so unvector the interrupt */
-	metag_out32(0, vec_addr);
-}
-
-/**
- * meta_intc_unmask_edge_irq_nomask() - unmask an edge irq by revectoring
- * @data:	data for the internal irq to unmask
- *
- * HWSTATMETA has no mask register. Instead the IRQ is revectored back to the
- * core and retriggered if necessary.
- */
-static void metag_internal_irq_unmask(struct irq_data *data)
-{
-	struct metag_internal_irq_priv *priv = &metag_internal_irq_priv;
-	irq_hw_number_t hw = data->hwirq;
-	unsigned int bit = 1 << hw;
-	void __iomem *vec_addr = metag_hwvec_addr(hw);
-	unsigned int thread = hard_processor_id();
-
-	set_bit(hw, &priv->unmasked);
-
-	/* there is no interrupt mask, so revector the interrupt */
-	metag_out32(TBI_TRIG_VEC(TBID_SIGNUM_TR1(thread)), vec_addr);
-
-	/*
-	 * Re-trigger interrupt
-	 *
-	 * Writing a 1 toggles, and a 0->1 transition triggers. We only
-	 * retrigger if the status bit is already set, which means we
-	 * need to clear it first. Retriggering is fundamentally racy
-	 * because if the interrupt fires again after we clear it we
-	 * could end up clearing it again and the interrupt handler
-	 * thinking it hasn't fired. Therefore we need to keep trying to
-	 * retrigger until the bit is set.
-	 */
-	if (metag_in32(HWSTATMETA) & bit) {
-		metag_out32(bit, HWSTATMETA);
-		while (!(metag_in32(HWSTATMETA) & bit))
-			metag_out32(bit, HWSTATMETA);
-	}
-}
-
-#ifdef CONFIG_SMP
-/*
- *	metag_internal_irq_set_affinity - set the affinity for an interrupt
- */
-static int metag_internal_irq_set_affinity(struct irq_data *data,
-			const struct cpumask *cpumask, bool force)
-{
-	unsigned int cpu, thread;
-	irq_hw_number_t hw = data->hwirq;
-	/*
-	 * Wire up this interrupt from *VECINT to the Meta core.
-	 *
-	 * Note that we can't wire up *VECINT to interrupt more than
-	 * one cpu (the interrupt code doesn't support it), so we just
-	 * pick the first cpu we find in 'cpumask'.
-	 */
-	cpu = cpumask_any_and(cpumask, cpu_online_mask);
-	thread = cpu_2_hwthread_id[cpu];
-
-	metag_out32(TBI_TRIG_VEC(TBID_SIGNUM_TR1(thread)),
-		    metag_hwvec_addr(hw));
-
-	return 0;
-}
-#endif
-
-/*
- *	metag_internal_irq_demux - irq de-multiplexer
- *	@irq:	the interrupt number
- *	@desc:	the interrupt description structure for this irq
- *
- *	The cpu receives an interrupt on TR1 when an interrupt has
- *	occurred. It is this function's job to demux this irq and
- *	figure out exactly which trigger needs servicing.
- */
-static void metag_internal_irq_demux(struct irq_desc *desc)
-{
-	struct metag_internal_irq_priv *priv = irq_desc_get_handler_data(desc);
-	irq_hw_number_t hw;
-	unsigned int irq_no;
-	u32 status;
-
-recalculate:
-	status = metag_in32(HWSTATMETA) & priv->unmasked;
-
-	for (hw = 0; status != 0; status >>= 1, ++hw) {
-		if (status & 0x1) {
-			/*
-			 * Map the hardware IRQ number to a virtual Linux IRQ
-			 * number.
-			 */
-			irq_no = irq_linear_revmap(priv->domain, hw);
-
-			/*
-			 * Only fire off interrupts that are
-			 * registered to be handled by the kernel.
-			 * Other interrupts are probably being
-			 * handled by other Meta hardware threads.
-			 */
-			generic_handle_irq(irq_no);
-
-			/*
-			 * The handler may have re-enabled interrupts
-			 * which could have caused a nested invocation
-			 * of this code and make the copy of the
-			 * status register we are using invalid.
-			 */
-			goto recalculate;
-		}
-	}
-}
-
-/**
- * internal_irq_map() - Map an internal meta IRQ to a virtual IRQ number.
- * @hw:		Number of the internal IRQ. Must be in range.
- *
- * Returns:	The virtual IRQ number of the Meta internal IRQ specified by
- *		@hw.
- */
-int internal_irq_map(unsigned int hw)
-{
-	struct metag_internal_irq_priv *priv = &metag_internal_irq_priv;
-	if (!priv->domain)
-		return -ENODEV;
-	return irq_create_mapping(priv->domain, hw);
-}
-
-/**
- *	metag_internal_irq_init_cpu - regsister with the Meta cpu
- *	@cpu:	the CPU to register on
- *
- *	Configure @cpu's TR1 irq so that we can demux irqs.
- */
-static void metag_internal_irq_init_cpu(struct metag_internal_irq_priv *priv,
-					int cpu)
-{
-	unsigned int thread = cpu_2_hwthread_id[cpu];
-	unsigned int signum = TBID_SIGNUM_TR1(thread);
-	int irq = tbisig_map(signum);
-
-	/* Register the multiplexed IRQ handler */
-	irq_set_chained_handler_and_data(irq, metag_internal_irq_demux, priv);
-	irq_set_irq_type(irq, IRQ_TYPE_LEVEL_LOW);
-}
-
-/**
- * metag_internal_intc_map() - map an internal irq
- * @d:		irq domain of internal trigger block
- * @irq:	virtual irq number
- * @hw:		hardware irq number within internal trigger block
- *
- * This sets up a virtual irq for a specified hardware interrupt. The irq chip
- * and handler is configured.
- */
-static int metag_internal_intc_map(struct irq_domain *d, unsigned int irq,
-				   irq_hw_number_t hw)
-{
-	/* only register interrupt if it is mapped */
-	if (!metag_hwvec_addr(hw))
-		return -EINVAL;
-
-	irq_set_chip_and_handler(irq, &internal_irq_edge_chip,
-				 handle_edge_irq);
-	return 0;
-}
-
-static const struct irq_domain_ops metag_internal_intc_domain_ops = {
-	.map	= metag_internal_intc_map,
-};
-
-/**
- *	metag_internal_irq_register - register internal IRQs
- *
- *	Register the irq chip and handler function for all internal IRQs
- */
-int __init init_internal_IRQ(void)
-{
-	struct metag_internal_irq_priv *priv = &metag_internal_irq_priv;
-	unsigned int cpu;
-
-	/* Set up an IRQ domain */
-	priv->domain = irq_domain_add_linear(NULL, 32,
-					     &metag_internal_intc_domain_ops,
-					     priv);
-	if (unlikely(!priv->domain)) {
-		pr_err("meta-internal-intc: cannot add IRQ domain\n");
-		return -ENOMEM;
-	}
-
-	/* Setup TR1 for all cpus. */
-	for_each_possible_cpu(cpu)
-		metag_internal_irq_init_cpu(priv, cpu);
-
-	return 0;
-};