irqchip: remove davinci aintc driver

The aintc driver was used on Davinci DM3xx and DM64xx SoCs, all of
which got dropped from Linux, so this driver is orphaned as well.
Acked-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

drivers/irqchip/Kconfig

@@ -136,11 +136,6 @@ config BRCMSTB_L2_IRQ
 	select GENERIC_IRQ_CHIP
 	select IRQ_DOMAIN
 
-config DAVINCI_AINTC
-	bool
-	select GENERIC_IRQ_CHIP
-	select IRQ_DOMAIN
-
 config DAVINCI_CP_INTC
 	bool
 	select GENERIC_IRQ_CHIP

drivers/irqchip/Makefile

@@ -8,7 +8,6 @@ obj-$(CONFIG_ATH79)			+= irq-ath79-misc.o
 obj-$(CONFIG_ARCH_BCM2835)		+= irq-bcm2835.o
 obj-$(CONFIG_ARCH_BCM2835)		+= irq-bcm2836.o
 obj-$(CONFIG_ARCH_ACTIONS)		+= irq-owl-sirq.o
-obj-$(CONFIG_DAVINCI_AINTC)		+= irq-davinci-aintc.o
 obj-$(CONFIG_DAVINCI_CP_INTC)		+= irq-davinci-cp-intc.o
 obj-$(CONFIG_EXYNOS_IRQ_COMBINER)	+= exynos-combiner.o
 obj-$(CONFIG_FARADAY_FTINTC010)		+= irq-ftintc010.o

drivers/irqchip/irq-davinci-aintc.c

-// SPDX-License-Identifier: GPL-2.0-or-later
-//
-// Copyright (C) 2006, 2019 Texas Instruments.
-//
-// Interrupt handler for DaVinci boards.
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/irqchip/irq-davinci-aintc.h>
-#include <linux/io.h>
-#include <linux/irqdomain.h>
-
-#include <asm/exception.h>
-
-#define DAVINCI_AINTC_FIQ_REG0		0x00
-#define DAVINCI_AINTC_FIQ_REG1		0x04
-#define DAVINCI_AINTC_IRQ_REG0		0x08
-#define DAVINCI_AINTC_IRQ_REG1		0x0c
-#define DAVINCI_AINTC_IRQ_IRQENTRY	0x14
-#define DAVINCI_AINTC_IRQ_ENT_REG0	0x18
-#define DAVINCI_AINTC_IRQ_ENT_REG1	0x1c
-#define DAVINCI_AINTC_IRQ_INCTL_REG	0x20
-#define DAVINCI_AINTC_IRQ_EABASE_REG	0x24
-#define DAVINCI_AINTC_IRQ_INTPRI0_REG	0x30
-#define DAVINCI_AINTC_IRQ_INTPRI7_REG	0x4c
-
-static void __iomem *davinci_aintc_base;
-static struct irq_domain *davinci_aintc_irq_domain;
-
-static inline void davinci_aintc_writel(unsigned long value, int offset)
-{
-	writel_relaxed(value, davinci_aintc_base + offset);
-}
-
-static inline unsigned long davinci_aintc_readl(int offset)
-{
-	return readl_relaxed(davinci_aintc_base + offset);
-}
-
-static __init void
-davinci_aintc_setup_gc(void __iomem *base,
-		       unsigned int irq_start, unsigned int num)
-{
-	struct irq_chip_generic *gc;
-	struct irq_chip_type *ct;
-
-	gc = irq_get_domain_generic_chip(davinci_aintc_irq_domain, irq_start);
-	gc->reg_base = base;
-	gc->irq_base = irq_start;
-
-	ct = gc->chip_types;
-	ct->chip.irq_ack = irq_gc_ack_set_bit;
-	ct->chip.irq_mask = irq_gc_mask_clr_bit;
-	ct->chip.irq_unmask = irq_gc_mask_set_bit;
-
-	ct->regs.ack = DAVINCI_AINTC_IRQ_REG0;
-	ct->regs.mask = DAVINCI_AINTC_IRQ_ENT_REG0;
-	irq_setup_generic_chip(gc, IRQ_MSK(num), IRQ_GC_INIT_MASK_CACHE,
-			       IRQ_NOREQUEST | IRQ_NOPROBE, 0);
-}
-
-static asmlinkage void __exception_irq_entry
-davinci_aintc_handle_irq(struct pt_regs *regs)
-{
-	int irqnr = davinci_aintc_readl(DAVINCI_AINTC_IRQ_IRQENTRY);
-
-	/*
-	 * Use the formula for entry vector index generation from section
-	 * 8.3.3 of the manual.
-	 */
-	irqnr >>= 2;
-	irqnr -= 1;
-
-	generic_handle_domain_irq(davinci_aintc_irq_domain, irqnr);
-}
-
-/* ARM Interrupt Controller Initialization */
-void __init davinci_aintc_init(const struct davinci_aintc_config *config)
-{
-	unsigned int irq_off, reg_off, prio, shift;
-	void __iomem *req;
-	int ret, irq_base;
-	const u8 *prios;
-
-	req = request_mem_region(config->reg.start,
-				 resource_size(&config->reg),
-				 "davinci-cp-intc");
-	if (!req) {
-		pr_err("%s: register range busy\n", __func__);
-		return;
-	}
-
-	davinci_aintc_base = ioremap(config->reg.start,
-				     resource_size(&config->reg));
-	if (!davinci_aintc_base) {
-		pr_err("%s: unable to ioremap register range\n", __func__);
-		return;
-	}
-
-	/* Clear all interrupt requests */
-	davinci_aintc_writel(~0x0, DAVINCI_AINTC_FIQ_REG0);
-	davinci_aintc_writel(~0x0, DAVINCI_AINTC_FIQ_REG1);
-	davinci_aintc_writel(~0x0, DAVINCI_AINTC_IRQ_REG0);
-	davinci_aintc_writel(~0x0, DAVINCI_AINTC_IRQ_REG1);
-
-	/* Disable all interrupts */
-	davinci_aintc_writel(0x0, DAVINCI_AINTC_IRQ_ENT_REG0);
-	davinci_aintc_writel(0x0, DAVINCI_AINTC_IRQ_ENT_REG1);
-
-	/* Interrupts disabled immediately, IRQ entry reflects all */
-	davinci_aintc_writel(0x0, DAVINCI_AINTC_IRQ_INCTL_REG);
-
-	/* we don't use the hardware vector table, just its entry addresses */
-	davinci_aintc_writel(0, DAVINCI_AINTC_IRQ_EABASE_REG);
-
-	/* Clear all interrupt requests */
-	davinci_aintc_writel(~0x0, DAVINCI_AINTC_FIQ_REG0);
-	davinci_aintc_writel(~0x0, DAVINCI_AINTC_FIQ_REG1);
-	davinci_aintc_writel(~0x0, DAVINCI_AINTC_IRQ_REG0);
-	davinci_aintc_writel(~0x0, DAVINCI_AINTC_IRQ_REG1);
-
-	prios = config->prios;
-	for (reg_off = DAVINCI_AINTC_IRQ_INTPRI0_REG;
-	     reg_off <= DAVINCI_AINTC_IRQ_INTPRI7_REG; reg_off += 4) {
-		for (shift = 0, prio = 0; shift < 32; shift += 4, prios++)
-			prio |= (*prios & 0x07) << shift;
-		davinci_aintc_writel(prio, reg_off);
-	}
-
-	irq_base = irq_alloc_descs(-1, 0, config->num_irqs, 0);
-	if (irq_base < 0) {
-		pr_err("%s: unable to allocate interrupt descriptors: %d\n",
-		       __func__, irq_base);
-		return;
-	}
-
-	davinci_aintc_irq_domain = irq_domain_add_legacy(NULL,
-						config->num_irqs, irq_base, 0,
-						&irq_domain_simple_ops, NULL);
-	if (!davinci_aintc_irq_domain) {
-		pr_err("%s: unable to create interrupt domain\n", __func__);
-		return;
-	}
-
-	ret = irq_alloc_domain_generic_chips(davinci_aintc_irq_domain, 32, 1,
-					     "AINTC", handle_edge_irq,
-					     IRQ_NOREQUEST | IRQ_NOPROBE, 0, 0);
-	if (ret) {
-		pr_err("%s: unable to allocate generic irq chips for domain\n",
-		       __func__);
-		return;
-	}
-
-	for (irq_off = 0, reg_off = 0;
-	     irq_off < config->num_irqs;
-	     irq_off += 32, reg_off += 0x04)
-		davinci_aintc_setup_gc(davinci_aintc_base + reg_off,
-				       irq_base + irq_off, 32);
-
-	set_handle_irq(davinci_aintc_handle_irq);
-}