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ARM: Orion: DT support for IRQ and GPIO Controllers

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Both IRQ and GPIO controllers can now be represented in DT.  The IRQ
controllers are setup first, and then the GPIO controllers. Interrupts
for GPIO lines are placed directly after the main interrupts in the
interrupt space.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@googlemail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Josh Coombs <josh.coombs@gmail.com>
Tested-by: Simon Baatz <gmbnomis@gmail.com>
This commit is contained in:
Andrew Lunn 2012-06-27 13:40:04 +02:00
parent 89fb2d77d5
commit 278b45b06b
13 changed files with 341 additions and 166 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
Documentation/devicetree/bindings/arm/mrvl/intc.txt
View File

@ -38,3 +38,23 @@ Example:
reg-names = "mux status", "mux mask";
mrvl,intc-nr-irqs = <2>;
};
* Marvell Orion Interrupt controller
Required properties
- compatible : Should be "marvell,orion-intc".
- #interrupt-cells: Specifies the number of cells needed to encode an
interrupt source. Supported value is <1>.
- interrupt-controller : Declare this node to be an interrupt controller.
- reg : Interrupt mask address. A list of 4 byte ranges, one per controller.
One entry in the list represents 32 interrupts.
Example:
intc: interrupt-controller {
compatible = "marvell,orion-intc", "marvell,intc";
interrupt-controller;
#interrupt-cells = <1>;
reg = <0xfed20204 0x04>,
<0xfed20214 0x04>;
};

23
Documentation/devicetree/bindings/gpio/mrvl-gpio.txt
View File

@ -27,3 +27,26 @@ Example:
interrupt-controller;
#interrupt-cells = <1>;
};
* Marvell Orion GPIO Controller
Required properties:
- compatible : Should be "marvell,orion-gpio"
- reg : Address and length of the register set for controller.
- gpio-controller : So we know this is a gpio controller.
- ngpio : How many gpios this controller has.
- interrupts : Up to 4 Interrupts for the controller.
Optional properties:
- mask-offset : For SMP Orions, offset for Nth CPU
Example:
gpio0: gpio@10100 {
compatible = "marvell,orion-gpio";
#gpio-cells = <2>;
gpio-controller;
reg = <0x10100 0x40>;
ngpio = <32>;
interrupts = <35>, <36>, <37>, <38>;
};

1
arch/arm/Kconfig
View File

@ -1105,6 +1105,7 @@ config PLAT_ORION
bool
select CLKSRC_MMIO
select GENERIC_IRQ_CHIP
select IRQ_DOMAIN
select COMMON_CLK
config PLAT_PXA

27
arch/arm/boot/dts/kirkwood.dtsi
View File

@ -2,6 +2,15 @@
/ {
compatible = "marvell,kirkwood";
interrupt-parent = <&intc>;
intc: interrupt-controller {
compatible = "marvell,orion-intc", "marvell,intc";
interrupt-controller;
#interrupt-cells = <1>;
reg = <0xf1020204 0x04>,
<0xf1020214 0x04>;
};
ocp@f1000000 {
compatible = "simple-bus";
@ -9,6 +18,24 @@ ocp@f1000000 {
#address-cells = <1>;
#size-cells = <1>;
gpio0: gpio@10100 {
compatible = "marvell,orion-gpio";
#gpio-cells = <2>;
gpio-controller;
reg = <0x10100 0x40>;
ngpio = <32>;
interrupts = <35>, <36>, <37>, <38>;
};
gpio1: gpio@10140 {
compatible = "marvell,orion-gpio";
#gpio-cells = <2>;
gpio-controller;
reg = <0x10140 0x40>;
ngpio = <18>;
interrupts = <39>, <40>, <41>;
};
serial@12000 {
compatible = "ns16550a";
reg = <0x12000 0x100>;

54
arch/arm/mach-dove/irq.c
View File

@ -20,22 +20,6 @@
#include <mach/bridge-regs.h>
#include "common.h"
static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
{
int irqoff;
BUG_ON(irq < IRQ_DOVE_GPIO_0_7 || irq > IRQ_DOVE_HIGH_GPIO);
irqoff = irq <= IRQ_DOVE_GPIO_16_23 ? irq - IRQ_DOVE_GPIO_0_7 :
3 + irq - IRQ_DOVE_GPIO_24_31;
orion_gpio_irq_handler(irqoff << 3);
if (irq == IRQ_DOVE_HIGH_GPIO) {
orion_gpio_irq_handler(40);
orion_gpio_irq_handler(48);
orion_gpio_irq_handler(56);
}
}
static void pmu_irq_mask(struct irq_data *d)
{
int pin = irq_to_pmu(d->irq);
@ -90,6 +74,27 @@ static void pmu_irq_handler(unsigned int irq, struct irq_desc *desc)
}
}
static int __initdata gpio0_irqs[4] = {
IRQ_DOVE_GPIO_0_7,
IRQ_DOVE_GPIO_8_15,
IRQ_DOVE_GPIO_16_23,
IRQ_DOVE_GPIO_24_31,
};
static int __initdata gpio1_irqs[4] = {
IRQ_DOVE_HIGH_GPIO,
0,
0,
0,
};
static int __initdata gpio2_irqs[4] = {
0,
0,
0,
0,
};
void __init dove_init_irq(void)
{
int i;
@ -100,19 +105,14 @@ void __init dove_init_irq(void)
/*
* Initialize gpiolib for GPIOs 0-71.
*/
orion_gpio_init(0, 32, DOVE_GPIO_LO_VIRT_BASE, 0,
IRQ_DOVE_GPIO_START);
irq_set_chained_handler(IRQ_DOVE_GPIO_0_7, gpio_irq_handler);
irq_set_chained_handler(IRQ_DOVE_GPIO_8_15, gpio_irq_handler);
irq_set_chained_handler(IRQ_DOVE_GPIO_16_23, gpio_irq_handler);
irq_set_chained_handler(IRQ_DOVE_GPIO_24_31, gpio_irq_handler);
orion_gpio_init(NULL, 0, 32, (void __iomem *)DOVE_GPIO_LO_VIRT_BASE, 0,
IRQ_DOVE_GPIO_START, gpio0_irqs);
orion_gpio_init(32, 32, DOVE_GPIO_HI_VIRT_BASE, 0,
IRQ_DOVE_GPIO_START + 32);
irq_set_chained_handler(IRQ_DOVE_HIGH_GPIO, gpio_irq_handler);
orion_gpio_init(NULL, 32, 32, (void __iomem *)DOVE_GPIO_HI_VIRT_BASE, 0,
IRQ_DOVE_GPIO_START + 32, gpio1_irqs);
orion_gpio_init(64, 8, DOVE_GPIO2_VIRT_BASE, 0,
IRQ_DOVE_GPIO_START + 64);
orion_gpio_init(NULL, 64, 8, (void __iomem *)DOVE_GPIO2_VIRT_BASE, 0,
IRQ_DOVE_GPIO_START + 64, gpio2_irqs);
/*
* Mask and clear PMU interrupts

3
arch/arm/mach-kirkwood/board-dt.c
View File

@ -18,6 +18,7 @@
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <mach/bridge-regs.h>
#include <plat/irq.h>
#include "common.h"
static struct of_device_id kirkwood_dt_match_table[] __initdata = {
@ -84,7 +85,7 @@ DT_MACHINE_START(KIRKWOOD_DT, "Marvell Kirkwood (Flattened Device Tree)")
/* Maintainer: Jason Cooper <jason@lakedaemon.net> */
.map_io = kirkwood_map_io,
.init_early = kirkwood_init_early,
.init_irq = kirkwood_init_irq,
.init_irq = orion_dt_init_irq,
.timer = &kirkwood_timer,
.init_machine = kirkwood_dt_init,
.restart = kirkwood_restart,

38
arch/arm/mach-kirkwood/irq.c
View File

@ -9,20 +9,23 @@
*/
#include <linux/gpio.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <mach/bridge-regs.h>
#include <plat/irq.h>
#include "common.h"
static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
{
BUG_ON(irq < IRQ_KIRKWOOD_GPIO_LOW_0_7);
BUG_ON(irq > IRQ_KIRKWOOD_GPIO_HIGH_16_23);
static int __initdata gpio0_irqs[4] = {
IRQ_KIRKWOOD_GPIO_LOW_0_7,
IRQ_KIRKWOOD_GPIO_LOW_8_15,
IRQ_KIRKWOOD_GPIO_LOW_16_23,
IRQ_KIRKWOOD_GPIO_LOW_24_31,
};
orion_gpio_irq_handler((irq - IRQ_KIRKWOOD_GPIO_LOW_0_7) << 3);
}
static int __initdata gpio1_irqs[4] = {
IRQ_KIRKWOOD_GPIO_HIGH_0_7,
IRQ_KIRKWOOD_GPIO_HIGH_8_15,
IRQ_KIRKWOOD_GPIO_HIGH_16_23,
0,
};
void __init kirkwood_init_irq(void)
{
@ -32,17 +35,8 @@ void __init kirkwood_init_irq(void)
/*
* Initialize gpiolib for GPIOs 0-49.
*/
orion_gpio_init(0, 32, GPIO_LOW_VIRT_BASE, 0,
IRQ_KIRKWOOD_GPIO_START);
irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_0_7, gpio_irq_handler);
irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_8_15, gpio_irq_handler);
irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_16_23, gpio_irq_handler);
irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_24_31, gpio_irq_handler);
orion_gpio_init(32, 18, GPIO_HIGH_VIRT_BASE, 0,
IRQ_KIRKWOOD_GPIO_START + 32);
irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_0_7, gpio_irq_handler);
irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_8_15, gpio_irq_handler);
irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_16_23,
gpio_irq_handler);
orion_gpio_init(NULL, 0, 32, (void __iomem *)GPIO_LOW_VIRT_BASE, 0,
IRQ_KIRKWOOD_GPIO_START, gpio0_irqs);
orion_gpio_init(NULL, 32, 18, (void __iomem *)GPIO_HIGH_VIRT_BASE, 0,
IRQ_KIRKWOOD_GPIO_START + 32, gpio1_irqs);
}

22
arch/arm/mach-mv78xx0/irq.c
View File

@ -9,19 +9,17 @@
*/
#include <linux/gpio.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/irq.h>
#include <mach/bridge-regs.h>
#include <plat/irq.h>
#include "common.h"
static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
{
BUG_ON(irq < IRQ_MV78XX0_GPIO_0_7 || irq > IRQ_MV78XX0_GPIO_24_31);
orion_gpio_irq_handler((irq - IRQ_MV78XX0_GPIO_0_7) << 3);
}
static int __initdata gpio0_irqs[4] = {
IRQ_MV78XX0_GPIO_0_7,
IRQ_MV78XX0_GPIO_8_15,
IRQ_MV78XX0_GPIO_16_23,
IRQ_MV78XX0_GPIO_24_31,
};
void __init mv78xx0_init_irq(void)
{
@ -34,11 +32,7 @@ void __init mv78xx0_init_irq(void)
* registers for core #1 are at an offset of 0x18 from those of
* core #0.)
*/
orion_gpio_init(0, 32, GPIO_VIRT_BASE,
orion_gpio_init(NULL, 0, 32, (void __iomem *)GPIO_VIRT_BASE,
mv78xx0_core_index() ? 0x18 : 0,
IRQ_MV78XX0_GPIO_START);
irq_set_chained_handler(IRQ_MV78XX0_GPIO_0_7, gpio_irq_handler);
irq_set_chained_handler(IRQ_MV78XX0_GPIO_8_15, gpio_irq_handler);
irq_set_chained_handler(IRQ_MV78XX0_GPIO_16_23, gpio_irq_handler);
irq_set_chained_handler(IRQ_MV78XX0_GPIO_24_31, gpio_irq_handler);
IRQ_MV78XX0_GPIO_START, gpio0_irqs);
}

22
arch/arm/mach-orion5x/irq.c
View File

@ -11,19 +11,16 @@
*/
#include <linux/gpio.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <mach/bridge-regs.h>
#include <plat/irq.h>
#include "common.h"
static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
{
BUG_ON(irq < IRQ_ORION5X_GPIO_0_7 || irq > IRQ_ORION5X_GPIO_24_31);
orion_gpio_irq_handler((irq - IRQ_ORION5X_GPIO_0_7) << 3);
}
static int __initdata gpio0_irqs[4] = {
IRQ_ORION5X_GPIO_0_7,
IRQ_ORION5X_GPIO_8_15,
IRQ_ORION5X_GPIO_16_23,
IRQ_ORION5X_GPIO_24_31,
};
void __init orion5x_init_irq(void)
{
@ -32,9 +29,6 @@ void __init orion5x_init_irq(void)
/*
* Initialize gpiolib for GPIOs 0-31.
*/
orion_gpio_init(0, 32, GPIO_VIRT_BASE, 0, IRQ_ORION5X_GPIO_START);
irq_set_chained_handler(IRQ_ORION5X_GPIO_0_7, gpio_irq_handler);
irq_set_chained_handler(IRQ_ORION5X_GPIO_8_15, gpio_irq_handler);
irq_set_chained_handler(IRQ_ORION5X_GPIO_16_23, gpio_irq_handler);
irq_set_chained_handler(IRQ_ORION5X_GPIO_24_31, gpio_irq_handler);
orion_gpio_init(NULL, 0, 32, (void __iomem *)GPIO_VIRT_BASE, 0,
IRQ_ORION5X_GPIO_START, gpio0_irqs);
}

238
arch/arm/plat-orion/gpio.c
View File

@ -8,15 +8,22 @@
* warranty of any kind, whether express or implied.
*/
#define DEBUG
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/bitops.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <linux/leds.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <plat/gpio.h>
/*
* GPIO unit register offsets.
@ -38,6 +45,7 @@ struct orion_gpio_chip {
unsigned long valid_output;
int mask_offset;
int secondary_irq_base;
struct irq_domain *domain;
};
static void __iomem *GPIO_OUT(struct orion_gpio_chip *ochip)
@ -222,10 +230,10 @@ static int orion_gpio_to_irq(struct gpio_chip *chip, unsigned pin)
struct orion_gpio_chip *ochip =
container_of(chip, struct orion_gpio_chip, chip);
return ochip->secondary_irq_base + pin;
return irq_create_mapping(ochip->domain,
ochip->secondary_irq_base + pin);
}
/*
* Orion-specific GPIO API extensions.
*/
@ -353,12 +361,10 @@ static int gpio_irq_set_type(struct irq_data *d, u32 type)
int pin;
u32 u;
pin = d->irq - gc->irq_base;
pin = d->hwirq - ochip->secondary_irq_base;
u = readl(GPIO_IO_CONF(ochip)) & (1 << pin);
if (!u) {
printk(KERN_ERR "orion gpio_irq_set_type failed "
"(irq %d, pin %d).\n", d->irq, pin);
return -EINVAL;
}
@ -397,85 +403,15 @@ static int gpio_irq_set_type(struct irq_data *d, u32 type)
u &= ~(1 << pin); /* rising */
writel(u, GPIO_IN_POL(ochip));
}
return 0;
}
void __init orion_gpio_init(int gpio_base, int ngpio,
u32 base, int mask_offset, int secondary_irq_base)
static void gpio_irq_handler(unsigned irq, struct irq_desc *desc)
{
struct orion_gpio_chip *ochip;
struct irq_chip_generic *gc;
struct irq_chip_type *ct;
char gc_label[16];
if (orion_gpio_chip_count == ARRAY_SIZE(orion_gpio_chips))
return;
snprintf(gc_label, sizeof(gc_label), "orion_gpio%d",
orion_gpio_chip_count);
ochip = orion_gpio_chips + orion_gpio_chip_count;
ochip->chip.label = kstrdup(gc_label, GFP_KERNEL);
ochip->chip.request = orion_gpio_request;
ochip->chip.direction_input = orion_gpio_direction_input;
ochip->chip.get = orion_gpio_get;
ochip->chip.direction_output = orion_gpio_direction_output;
ochip->chip.set = orion_gpio_set;
ochip->chip.to_irq = orion_gpio_to_irq;
ochip->chip.base = gpio_base;
ochip->chip.ngpio = ngpio;
ochip->chip.can_sleep = 0;
spin_lock_init(&ochip->lock);
ochip->base = (void __iomem *)base;
ochip->valid_input = 0;
ochip->valid_output = 0;
ochip->mask_offset = mask_offset;
ochip->secondary_irq_base = secondary_irq_base;
gpiochip_add(&ochip->chip);
orion_gpio_chip_count++;
/*
* Mask and clear GPIO interrupts.
*/
writel(0, GPIO_EDGE_CAUSE(ochip));
writel(0, GPIO_EDGE_MASK(ochip));
writel(0, GPIO_LEVEL_MASK(ochip));
gc = irq_alloc_generic_chip("orion_gpio_irq", 2, secondary_irq_base,
ochip->base, handle_level_irq);
gc->private = ochip;
ct = gc->chip_types;
ct->regs.mask = ochip->mask_offset + GPIO_LEVEL_MASK_OFF;
ct->type = IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW;
ct->chip.irq_mask = irq_gc_mask_clr_bit;
ct->chip.irq_unmask = irq_gc_mask_set_bit;
ct->chip.irq_set_type = gpio_irq_set_type;
ct++;
ct->regs.mask = ochip->mask_offset + GPIO_EDGE_MASK_OFF;
ct->regs.ack = GPIO_EDGE_CAUSE_OFF;
ct->type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
ct->chip.irq_ack = irq_gc_ack_clr_bit;
ct->chip.irq_mask = irq_gc_mask_clr_bit;
ct->chip.irq_unmask = irq_gc_mask_set_bit;
ct->chip.irq_set_type = gpio_irq_set_type;
ct->handler = handle_edge_irq;
irq_setup_generic_chip(gc, IRQ_MSK(ngpio), IRQ_GC_INIT_MASK_CACHE,
IRQ_NOREQUEST, IRQ_LEVEL | IRQ_NOPROBE);
}
void orion_gpio_irq_handler(int pinoff)
{
struct orion_gpio_chip *ochip;
struct orion_gpio_chip *ochip = irq_get_handler_data(irq);
u32 cause, type;
int i;
ochip = orion_gpio_chip_find(pinoff);
if (ochip == NULL)
return;
@ -502,3 +438,151 @@ void orion_gpio_irq_handler(int pinoff)
generic_handle_irq(irq);
}
}
void __init orion_gpio_init(struct device_node *np,
int gpio_base, int ngpio,
void __iomem *base, int mask_offset,
int secondary_irq_base,
int irqs[4])
{
struct orion_gpio_chip *ochip;
struct irq_chip_generic *gc;
struct irq_chip_type *ct;
char gc_label[16];
int i;
if (orion_gpio_chip_count == ARRAY_SIZE(orion_gpio_chips))
return;
snprintf(gc_label, sizeof(gc_label), "orion_gpio%d",
orion_gpio_chip_count);
ochip = orion_gpio_chips + orion_gpio_chip_count;
ochip->chip.label = kstrdup(gc_label, GFP_KERNEL);
ochip->chip.request = orion_gpio_request;
ochip->chip.direction_input = orion_gpio_direction_input;
ochip->chip.get = orion_gpio_get;
ochip->chip.direction_output = orion_gpio_direction_output;
ochip->chip.set = orion_gpio_set;
ochip->chip.to_irq = orion_gpio_to_irq;
ochip->chip.base = gpio_base;
ochip->chip.ngpio = ngpio;
ochip->chip.can_sleep = 0;
#ifdef CONFIG_OF
ochip->chip.of_node = np;
#endif
spin_lock_init(&ochip->lock);
ochip->base = (void __iomem *)base;
ochip->valid_input = 0;
ochip->valid_output = 0;
ochip->mask_offset = mask_offset;
ochip->secondary_irq_base = secondary_irq_base;
gpiochip_add(&ochip->chip);
/*
* Mask and clear GPIO interrupts.
*/
writel(0, GPIO_EDGE_CAUSE(ochip));
writel(0, GPIO_EDGE_MASK(ochip));
writel(0, GPIO_LEVEL_MASK(ochip));
/* Setup the interrupt handlers. Each chip can have up to 4
* interrupt handlers, with each handler dealing with 8 GPIO
* pins. */
for (i = 0; i < 4; i++) {
if (irqs[i]) {
irq_set_handler_data(irqs[i], ochip);
irq_set_chained_handler(irqs[i], gpio_irq_handler);
}
}
gc = irq_alloc_generic_chip("orion_gpio_irq", 2,
secondary_irq_base,
ochip->base, handle_level_irq);
gc->private = ochip;
ct = gc->chip_types;
ct->regs.mask = ochip->mask_offset + GPIO_LEVEL_MASK_OFF;
ct->type = IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW;
ct->chip.irq_mask = irq_gc_mask_clr_bit;
ct->chip.irq_unmask = irq_gc_mask_set_bit;
ct->chip.irq_set_type = gpio_irq_set_type;
ct->chip.name = ochip->chip.label;
ct++;
ct->regs.mask = ochip->mask_offset + GPIO_EDGE_MASK_OFF;
ct->regs.ack = GPIO_EDGE_CAUSE_OFF;
ct->type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
ct->chip.irq_ack = irq_gc_ack_clr_bit;
ct->chip.irq_mask = irq_gc_mask_clr_bit;
ct->chip.irq_unmask = irq_gc_mask_set_bit;
ct->chip.irq_set_type = gpio_irq_set_type;
ct->handler = handle_edge_irq;
ct->chip.name = ochip->chip.label;
irq_setup_generic_chip(gc, IRQ_MSK(ngpio), IRQ_GC_INIT_MASK_CACHE,
IRQ_NOREQUEST, IRQ_LEVEL | IRQ_NOPROBE);
/* Setup irq domain on top of the generic chip. */
ochip->domain = irq_domain_add_legacy(np,
ochip->chip.ngpio,
ochip->secondary_irq_base,
ochip->secondary_irq_base,
&irq_domain_simple_ops,
ochip);
if (!ochip->domain)
panic("%s: couldn't allocate irq domain (DT).\n",
ochip->chip.label);
orion_gpio_chip_count++;
}
#ifdef CONFIG_OF
static void __init orion_gpio_of_init_one(struct device_node *np,
int irq_gpio_base)
{
int ngpio, gpio_base, mask_offset;
void __iomem *base;
int ret, i;
int irqs[4];
int secondary_irq_base;
ret = of_property_read_u32(np, "ngpio", &ngpio);
if (ret)
goto out;
ret = of_property_read_u32(np, "mask-offset", &mask_offset);
if (ret == -EINVAL)
mask_offset = 0;
else
goto out;
base = of_iomap(np, 0);
if (!base)
goto out;
secondary_irq_base = irq_gpio_base + (32 * orion_gpio_chip_count);
gpio_base = 32 * orion_gpio_chip_count;
/* Get the interrupt numbers. Each chip can have up to 4
* interrupt handlers, with each handler dealing with 8 GPIO
* pins. */
for (i = 0; i < 4; i++)
irqs[i] = irq_of_parse_and_map(np, i);
orion_gpio_init(np, gpio_base, ngpio, base, mask_offset,
secondary_irq_base, irqs);
return;
out:
pr_err("%s: %s: missing mandatory property\n", __func__, np->name);
}
void __init orion_gpio_of_init(int irq_gpio_base)
{
struct device_node *np;
for_each_compatible_node(np, NULL, "marvell,orion-gpio")
orion_gpio_of_init_one(np, irq_gpio_base);
}
#endif

16
arch/arm/plat-orion/include/plat/gpio.h
View File

@ -13,7 +13,7 @@
#include <linux/init.h>
#include <linux/types.h>
#include <linux/irqdomain.h>
/*
* Orion-specific GPIO API extensions.
*/
@ -27,13 +27,11 @@ int orion_gpio_led_blink_set(unsigned gpio, int state,
void orion_gpio_set_valid(unsigned pin, int mode);
/* Initialize gpiolib. */
void __init orion_gpio_init(int gpio_base, int ngpio,
u32 base, int mask_offset, int secondary_irq_base);
/*
* GPIO interrupt handling.
*/
void orion_gpio_irq_handler(int irqoff);
void __init orion_gpio_init(struct device_node *np,
int gpio_base, int ngpio,
void __iomem *base, int mask_offset,
int secondary_irq_base,
int irq[4]);
void __init orion_gpio_of_init(int irq_gpio_base);
#endif

3
arch/arm/plat-orion/include/plat/irq.h
View File

@ -12,6 +12,5 @@
#define __PLAT_IRQ_H
void orion_irq_init(unsigned int irq_start, void __iomem *maskaddr);
void __init orion_dt_init_irq(void);
#endif

40
arch/arm/plat-orion/irq.c
View File

@ -11,8 +11,12 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/io.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <plat/irq.h>
#include <plat/gpio.h>
void __init orion_irq_init(unsigned int irq_start, void __iomem *maskaddr)
{
@ -32,3 +36,39 @@ void __init orion_irq_init(unsigned int irq_start, void __iomem *maskaddr)
irq_setup_generic_chip(gc, IRQ_MSK(32), IRQ_GC_INIT_MASK_CACHE,
IRQ_NOREQUEST, IRQ_LEVEL | IRQ_NOPROBE);
}
#ifdef CONFIG_OF
static int __init orion_add_irq_domain(struct device_node *np,
struct device_node *interrupt_parent)
{
int i = 0, irq_gpio;
void __iomem *base;
do {
base = of_iomap(np, i);
if (base) {
orion_irq_init(i * 32, base);
i++;
}
} while (base);
irq_domain_add_legacy(np, i * 32, 0, 0,
&irq_domain_simple_ops, NULL);
irq_gpio = i * 32;
orion_gpio_of_init(irq_gpio);
return 0;
}
static const struct of_device_id orion_irq_match[] = {
{ .compatible = "marvell,orion-intc",
.data = orion_add_irq_domain, },
{},
};
void __init orion_dt_init_irq(void)
{
of_irq_init(orion_irq_match);
}
#endif