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Message-ID: <yw1xh7naz9be.fsf@mansr.com>
Date: Thu, 21 Jan 2021 13:52:21 +0000
From: Måns Rullgård <mans@...sr.com>
To: Arnd Bergmann <arnd@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Marc Zyngier <maz@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Arnd Bergmann <arnd@...db.de>,
Marc Gonzalez <marc.w.gonzalez@...e.fr>
Subject: Re: [PATCH 1/2] irqchip: remove sigma tango driver
Arnd Bergmann <arnd@...nel.org> writes:
> 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>
Acked-by: Mans Rullgard <mans@...sr.com>
> ---
> .../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
>
--
Måns Rullgård
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