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Message-Id: <20210120133008.2421897-2-arnd@kernel.org>
Date: Wed, 20 Jan 2021 14:30:07 +0100
From: Arnd Bergmann <arnd@...nel.org>
To: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Marc Zyngier <maz@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>
Cc: Arnd Bergmann <arnd@...db.de>,
Marc Gonzalez <marc.w.gonzalez@...e.fr>,
Mans Rullgard <mans@...sr.com>
Subject: [PATCH 1/2] irqchip: remove sigma tango driver
From: Arnd Bergmann <arnd@...db.de>
The tango platform is getting removed, so the driver is no
longer needed.
Cc: Marc Gonzalez <marc.w.gonzalez@...e.fr>
Cc: Mans Rullgard <mans@...sr.com>
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
.../sigma,smp8642-intc.txt | 48 ----
drivers/irqchip/Kconfig | 5 -
drivers/irqchip/Makefile | 1 -
drivers/irqchip/irq-tango.c | 227 ------------------
4 files changed, 281 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/interrupt-controller/sigma,smp8642-intc.txt
delete mode 100644 drivers/irqchip/irq-tango.c
diff --git a/Documentation/devicetree/bindings/interrupt-controller/sigma,smp8642-intc.txt b/Documentation/devicetree/bindings/interrupt-controller/sigma,smp8642-intc.txt
deleted file mode 100644
index 355c18a3a4d3..000000000000
--- a/Documentation/devicetree/bindings/interrupt-controller/sigma,smp8642-intc.txt
+++ /dev/null
@@ -1,48 +0,0 @@
-Sigma Designs SMP86xx/SMP87xx secondary interrupt controller
-
-Required properties:
-- compatible: should be "sigma,smp8642-intc"
-- reg: physical address of MMIO region
-- ranges: address space mapping of child nodes
-- interrupt-controller: boolean
-- #address-cells: should be <1>
-- #size-cells: should be <1>
-
-One child node per control block with properties:
-- reg: address of registers for this control block
-- interrupt-controller: boolean
-- #interrupt-cells: should be <2>, interrupt index and flags per interrupts.txt
-- interrupts: interrupt spec of primary interrupt controller
-
-Example:
-
-interrupt-controller@...00 {
- compatible = "sigma,smp8642-intc";
- reg = <0x6e000 0x400>;
- ranges = <0x0 0x6e000 0x400>;
- interrupt-parent = <&gic>;
- interrupt-controller;
- #address-cells = <1>;
- #size-cells = <1>;
-
- irq0: interrupt-controller@0 {
- reg = <0x000 0x100>;
- interrupt-controller;
- #interrupt-cells = <2>;
- interrupts = <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>;
- };
-
- irq1: interrupt-controller@100 {
- reg = <0x100 0x100>;
- interrupt-controller;
- #interrupt-cells = <2>;
- interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>;
- };
-
- irq2: interrupt-controller@300 {
- reg = <0x300 0x100>;
- interrupt-controller;
- #interrupt-cells = <2>;
- interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>;
- };
-};
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 94920a51c628..f95d114c63ed 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -260,11 +260,6 @@ config ST_IRQCHIP
help
Enables SysCfg Controlled IRQs on STi based platforms.
-config TANGO_IRQ
- bool
- select IRQ_DOMAIN
- select GENERIC_IRQ_CHIP
-
config TB10X_IRQC
bool
select IRQ_DOMAIN
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index 0ac93bfaec61..084e11774071 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -55,7 +55,6 @@ obj-$(CONFIG_VERSATILE_FPGA_IRQ) += irq-versatile-fpga.o
obj-$(CONFIG_ARCH_NSPIRE) += irq-zevio.o
obj-$(CONFIG_ARCH_VT8500) += irq-vt8500.o
obj-$(CONFIG_ST_IRQCHIP) += irq-st.o
-obj-$(CONFIG_TANGO_IRQ) += irq-tango.o
obj-$(CONFIG_TB10X_IRQC) += irq-tb10x.o
obj-$(CONFIG_TS4800_IRQ) += irq-ts4800.o
obj-$(CONFIG_XTENSA) += irq-xtensa-pic.o
diff --git a/drivers/irqchip/irq-tango.c b/drivers/irqchip/irq-tango.c
deleted file mode 100644
index 34290f09b853..000000000000
--- a/drivers/irqchip/irq-tango.c
+++ /dev/null
@@ -1,227 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2014 Mans Rullgard <mans@...sr.com>
- */
-
-#include <linux/init.h>
-#include <linux/irq.h>
-#include <linux/irqchip.h>
-#include <linux/irqchip/chained_irq.h>
-#include <linux/ioport.h>
-#include <linux/io.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-#include <linux/slab.h>
-
-#define IRQ0_CTL_BASE 0x0000
-#define IRQ1_CTL_BASE 0x0100
-#define EDGE_CTL_BASE 0x0200
-#define IRQ2_CTL_BASE 0x0300
-
-#define IRQ_CTL_HI 0x18
-#define EDGE_CTL_HI 0x20
-
-#define IRQ_STATUS 0x00
-#define IRQ_RAWSTAT 0x04
-#define IRQ_EN_SET 0x08
-#define IRQ_EN_CLR 0x0c
-#define IRQ_SOFT_SET 0x10
-#define IRQ_SOFT_CLR 0x14
-
-#define EDGE_STATUS 0x00
-#define EDGE_RAWSTAT 0x04
-#define EDGE_CFG_RISE 0x08
-#define EDGE_CFG_FALL 0x0c
-#define EDGE_CFG_RISE_SET 0x10
-#define EDGE_CFG_RISE_CLR 0x14
-#define EDGE_CFG_FALL_SET 0x18
-#define EDGE_CFG_FALL_CLR 0x1c
-
-struct tangox_irq_chip {
- void __iomem *base;
- unsigned long ctl;
-};
-
-static inline u32 intc_readl(struct tangox_irq_chip *chip, int reg)
-{
- return readl_relaxed(chip->base + reg);
-}
-
-static inline void intc_writel(struct tangox_irq_chip *chip, int reg, u32 val)
-{
- writel_relaxed(val, chip->base + reg);
-}
-
-static void tangox_dispatch_irqs(struct irq_domain *dom, unsigned int status,
- int base)
-{
- unsigned int hwirq;
- unsigned int virq;
-
- while (status) {
- hwirq = __ffs(status);
- virq = irq_find_mapping(dom, base + hwirq);
- if (virq)
- generic_handle_irq(virq);
- status &= ~BIT(hwirq);
- }
-}
-
-static void tangox_irq_handler(struct irq_desc *desc)
-{
- struct irq_domain *dom = irq_desc_get_handler_data(desc);
- struct irq_chip *host_chip = irq_desc_get_chip(desc);
- struct tangox_irq_chip *chip = dom->host_data;
- unsigned int status_lo, status_hi;
-
- chained_irq_enter(host_chip, desc);
-
- status_lo = intc_readl(chip, chip->ctl + IRQ_STATUS);
- status_hi = intc_readl(chip, chip->ctl + IRQ_CTL_HI + IRQ_STATUS);
-
- tangox_dispatch_irqs(dom, status_lo, 0);
- tangox_dispatch_irqs(dom, status_hi, 32);
-
- chained_irq_exit(host_chip, desc);
-}
-
-static int tangox_irq_set_type(struct irq_data *d, unsigned int flow_type)
-{
- struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
- struct tangox_irq_chip *chip = gc->domain->host_data;
- struct irq_chip_regs *regs = &gc->chip_types[0].regs;
-
- switch (flow_type & IRQ_TYPE_SENSE_MASK) {
- case IRQ_TYPE_EDGE_RISING:
- intc_writel(chip, regs->type + EDGE_CFG_RISE_SET, d->mask);
- intc_writel(chip, regs->type + EDGE_CFG_FALL_CLR, d->mask);
- break;
-
- case IRQ_TYPE_EDGE_FALLING:
- intc_writel(chip, regs->type + EDGE_CFG_RISE_CLR, d->mask);
- intc_writel(chip, regs->type + EDGE_CFG_FALL_SET, d->mask);
- break;
-
- case IRQ_TYPE_LEVEL_HIGH:
- intc_writel(chip, regs->type + EDGE_CFG_RISE_CLR, d->mask);
- intc_writel(chip, regs->type + EDGE_CFG_FALL_CLR, d->mask);
- break;
-
- case IRQ_TYPE_LEVEL_LOW:
- intc_writel(chip, regs->type + EDGE_CFG_RISE_SET, d->mask);
- intc_writel(chip, regs->type + EDGE_CFG_FALL_SET, d->mask);
- break;
-
- default:
- pr_err("Invalid trigger mode %x for IRQ %d\n",
- flow_type, d->irq);
- return -EINVAL;
- }
-
- return irq_setup_alt_chip(d, flow_type);
-}
-
-static void __init tangox_irq_init_chip(struct irq_chip_generic *gc,
- unsigned long ctl_offs,
- unsigned long edge_offs)
-{
- struct tangox_irq_chip *chip = gc->domain->host_data;
- struct irq_chip_type *ct = gc->chip_types;
- unsigned long ctl_base = chip->ctl + ctl_offs;
- unsigned long edge_base = EDGE_CTL_BASE + edge_offs;
- int i;
-
- gc->reg_base = chip->base;
- gc->unused = 0;
-
- for (i = 0; i < 2; i++) {
- ct[i].chip.irq_ack = irq_gc_ack_set_bit;
- ct[i].chip.irq_mask = irq_gc_mask_disable_reg;
- ct[i].chip.irq_mask_ack = irq_gc_mask_disable_and_ack_set;
- ct[i].chip.irq_unmask = irq_gc_unmask_enable_reg;
- ct[i].chip.irq_set_type = tangox_irq_set_type;
- ct[i].chip.name = gc->domain->name;
-
- ct[i].regs.enable = ctl_base + IRQ_EN_SET;
- ct[i].regs.disable = ctl_base + IRQ_EN_CLR;
- ct[i].regs.ack = edge_base + EDGE_RAWSTAT;
- ct[i].regs.type = edge_base;
- }
-
- ct[0].type = IRQ_TYPE_LEVEL_MASK;
- ct[0].handler = handle_level_irq;
-
- ct[1].type = IRQ_TYPE_EDGE_BOTH;
- ct[1].handler = handle_edge_irq;
-
- intc_writel(chip, ct->regs.disable, 0xffffffff);
- intc_writel(chip, ct->regs.ack, 0xffffffff);
-}
-
-static void __init tangox_irq_domain_init(struct irq_domain *dom)
-{
- struct irq_chip_generic *gc;
- int i;
-
- for (i = 0; i < 2; i++) {
- gc = irq_get_domain_generic_chip(dom, i * 32);
- tangox_irq_init_chip(gc, i * IRQ_CTL_HI, i * EDGE_CTL_HI);
- }
-}
-
-static int __init tangox_irq_init(void __iomem *base, struct resource *baseres,
- struct device_node *node)
-{
- struct tangox_irq_chip *chip;
- struct irq_domain *dom;
- struct resource res;
- int irq;
- int err;
-
- irq = irq_of_parse_and_map(node, 0);
- if (!irq)
- panic("%pOFn: failed to get IRQ", node);
-
- err = of_address_to_resource(node, 0, &res);
- if (err)
- panic("%pOFn: failed to get address", node);
-
- chip = kzalloc(sizeof(*chip), GFP_KERNEL);
- chip->ctl = res.start - baseres->start;
- chip->base = base;
-
- dom = irq_domain_add_linear(node, 64, &irq_generic_chip_ops, chip);
- if (!dom)
- panic("%pOFn: failed to create irqdomain", node);
-
- err = irq_alloc_domain_generic_chips(dom, 32, 2, node->name,
- handle_level_irq, 0, 0, 0);
- if (err)
- panic("%pOFn: failed to allocate irqchip", node);
-
- tangox_irq_domain_init(dom);
-
- irq_set_chained_handler_and_data(irq, tangox_irq_handler, dom);
-
- return 0;
-}
-
-static int __init tangox_of_irq_init(struct device_node *node,
- struct device_node *parent)
-{
- struct device_node *c;
- struct resource res;
- void __iomem *base;
-
- base = of_iomap(node, 0);
- if (!base)
- panic("%pOFn: of_iomap failed", node);
-
- of_address_to_resource(node, 0, &res);
-
- for_each_child_of_node(node, c)
- tangox_irq_init(base, &res, c);
-
- return 0;
-}
-IRQCHIP_DECLARE(tangox_intc, "sigma,smp8642-intc", tangox_of_irq_init);
--
2.29.2
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