Hi,
I've noticed this patch hasn't gotten a reply for a while now. Just wondering
what's the status of this patch and whether there is anything else I should fix
before this can get accepted.
Cheers,
Daniel Tang
On 25/11/2013, at 3:02 PM, dt.ta...@gmail.com wrote:
> From: Daniel Tang
>
> This patch adds support for the interrupt controllers found in some
> TI-Nspire models.
>
> FIQ support was taken out to simplify the driver
> code and may be added in later. Since Linux on this platform doesn't
> really use FIQs, this wasn't really that important in the first
> place.
>
> Changes from v1 to v2:
> * Converted to use generic IRQ chips.
> * Removed FIQ for now to simplify driver code.
> * Based against tip/irq/core and uses IRQ domain support for generic
> chips.
>
> Signed-off-by: Daniel Tang
> Acked-by: Grant Likely
> ---
> .../interrupt-controller/lsi,zevio-intc.txt| 18 +++
> drivers/irqchip/Makefile | 1 +
> drivers/irqchip/irq-zevio.c| 129 +
> 3 files changed, 148 insertions(+)
> create mode 100644
> Documentation/devicetree/bindings/interrupt-controller/lsi,zevio-intc.txt
> create mode 100644 drivers/irqchip/irq-zevio.c
>
> diff --git
> a/Documentation/devicetree/bindings/interrupt-controller/lsi,zevio-intc.txt
> b/Documentation/devicetree/bindings/interrupt-controller/lsi,zevio-intc.txt
> new file mode 100644
> index 000..aee38e7
> --- /dev/null
> +++
> b/Documentation/devicetree/bindings/interrupt-controller/lsi,zevio-intc.txt
> @@ -0,0 +1,18 @@
> +TI-NSPIRE interrupt controller
> +
> +Required properties:
> +- compatible: Compatible property value should be "lsi,zevio-intc".
> +
> +- reg: Physical base address of the controller and length of memory mapped
> + region.
> +
> +- interrupt-controller : Identifies the node as an interrupt controller
> +
> +Example:
> +
> +interrupt-controller {
> + compatible = "lsi,zevio-intc";
> + interrupt-controller;
> + reg = <0xDC00 0x1000>;
> + #interrupt-cells = <1>;
> +};
> diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
> index cda4cb5..f313d14 100644
> --- a/drivers/irqchip/Makefile
> +++ b/drivers/irqchip/Makefile
> @@ -15,4 +15,5 @@ obj-$(CONFIG_SIRF_IRQ) += irq-sirfsoc.o
> obj-$(CONFIG_RENESAS_INTC_IRQPIN) += irq-renesas-intc-irqpin.o
> obj-$(CONFIG_RENESAS_IRQC)+= irq-renesas-irqc.o
> obj-$(CONFIG_VERSATILE_FPGA_IRQ) += irq-versatile-fpga.o
> +obj-$(CONFIG_ARCH_NSPIRE)+= irq-zevio.o
> obj-$(CONFIG_ARCH_VT8500) += irq-vt8500.o
> diff --git a/drivers/irqchip/irq-zevio.c b/drivers/irqchip/irq-zevio.c
> new file mode 100644
> index 000..92e6c7b
> --- /dev/null
> +++ b/drivers/irqchip/irq-zevio.c
> @@ -0,0 +1,129 @@
> +/*
> + * linux/drivers/irqchip/irq-zevio.c
> + *
> + * Copyright (C) 2013 Daniel Tang
> + *
> + * 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.
> + *
> + */
> +
> +#include
> +#include
> +#include
> +#include
> +#include
> +
> +#include
> +#include
> +
> +#include "irqchip.h"
> +
> +#define IO_STATUS0x000
> +#define IO_RAW_STATUS0x004
> +#define IO_ENABLE0x008
> +#define IO_DISABLE 0x00C
> +#define IO_CURRENT 0x020
> +#define IO_RESET 0x028
> +#define IO_MAX_PRIOTY0x02C
> +
> +#define IO_IRQ_BASE 0x000
> +#define IO_FIQ_BASE 0x100
> +
> +#define IO_INVERT_SEL0x200
> +#define IO_STICKY_SEL0x204
> +#define IO_PRIORITY_SEL 0x300
> +
> +#define MAX_INTRS32
> +#define FIQ_STARTMAX_INTRS
> +
> +static struct irq_domain *zevio_irq_domain;
> +static void __iomem *zevio_irq_io;
> +
> +static void zevio_irq_ack(struct irq_data *irqd)
> +{
> + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(irqd);
> + struct irq_chip_regs *regs =
> + &container_of(irqd->chip, struct irq_chip_type, chip)->regs;
> +
> + irq_gc_lock(gc);
> + readl(gc->reg_base + regs->ack);
> + irq_gc_unlock(gc);
> +}
> +
> +static void init_base(void __iomem *base)
> +{
> + /* Disable all interrupts */
> + writel(~0, base + IO_DISABLE);
> +
> + /* Accept interrupts of all priorities */
> + writel(0xF, base + IO_MAX_PRIOTY);
> +
> + /* Reset existing interrupts */
> + readl(base + IO_RESET);
> +}
> +
> +asmlinkage void __exception_irq_entry zevio_handle_irq(struct pt_regs *regs)
> +{
> + int irqnr;
> +
> + while (readl(zevio_irq_io + IO_STATUS)) {
> + irqnr = readl(zevio_irq_io + IO_CURRENT);
> + irqnr = irq_find_mapping(zevio_irq_domain, irqnr);
> + handle_IRQ(irqnr, regs);
> + };
> +}
> +
> +static int __init zevio_of_init(struct device_node *node,
> + struct device_node *parent)
> +{
> + unsigned int clr = IRQ_NOREQUEST | IRQ
