Commit a6c45b99 authored by Linus Walleij's avatar Linus Walleij

pinctrl/coh901: use irqdomain, allocate irqdescs

This switches the COH 901 pinctrl driver to allocate its GPIO
IRQs dynamically, and start to use a linear irqdomain to map
from the hardware IRQs.

This way we can cut away the complex allocation of IRQ numbers
from the <mach/irqs.h> file.
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent d4a31ee8
......@@ -1445,7 +1445,6 @@ static struct platform_device pinctrl_device = {
static struct u300_gpio_platform u300_gpio_plat = {
.ports = 7,
.gpio_base = 0,
.gpio_irq_base = IRQ_U300_GPIO_BASE,
.pinctrl_device = &pinctrl_device,
};
......
......@@ -77,14 +77,4 @@
#define IRQ_U300_GPIO_PORT6 87
#define U300_VIC_IRQS_END 88
/* Maximum 8*7 GPIO lines */
#ifdef CONFIG_PINCTRL_COH901
#define IRQ_U300_GPIO_BASE (U300_VIC_IRQS_END)
#define IRQ_U300_GPIO_END (IRQ_U300_GPIO_BASE + 56)
#else
#define IRQ_U300_GPIO_END (U300_VIC_IRQS_END)
#endif
#define NR_IRQS_U300 (IRQ_U300_GPIO_END - IRQ_U300_INTCON0_START)
#endif
......@@ -13,6 +13,7 @@
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/irqdomain.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/platform_device.h>
......@@ -67,7 +68,6 @@ struct u300_gpio {
struct resource *memres;
void __iomem *base;
struct device *dev;
int irq_base;
u32 stride;
/* Register offsets */
u32 pcr;
......@@ -83,6 +83,7 @@ struct u300_gpio_port {
struct list_head node;
struct u300_gpio *gpio;
char name[8];
struct irq_domain *domain;
int irq;
int number;
u8 toggle_edge_mode;
......@@ -314,10 +315,30 @@ static int u300_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
static int u300_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
{
struct u300_gpio *gpio = to_u300_gpio(chip);
int retirq = gpio->irq_base + offset;
int portno = offset >> 3;
struct u300_gpio_port *port = NULL;
struct list_head *p;
int retirq;
dev_dbg(gpio->dev, "request IRQ for GPIO %d, return %d\n", offset,
retirq);
list_for_each(p, &gpio->port_list) {
port = list_entry(p, struct u300_gpio_port, node);
if (port->number == portno)
break;
}
if (port == NULL) {
dev_err(gpio->dev, "could not locate port for GPIO %d IRQ\n",
offset);
return -EINVAL;
}
/*
* The local hwirqs on the port are the lower three bits, there
* are exactly 8 IRQs per port since they are 8-bit
*/
retirq = irq_find_mapping(port->domain, (offset & 0x7));
dev_dbg(gpio->dev, "request IRQ for GPIO %d, return %d from port %d\n",
offset, retirq, port->number);
return retirq;
}
......@@ -467,7 +488,7 @@ static int u300_gpio_irq_type(struct irq_data *d, unsigned trigger)
{
struct u300_gpio_port *port = irq_data_get_irq_chip_data(d);
struct u300_gpio *gpio = port->gpio;
int offset = d->irq - gpio->irq_base;
int offset = (port->number << 3) + d->hwirq;
u32 val;
if ((trigger & IRQF_TRIGGER_RISING) &&
......@@ -503,10 +524,12 @@ static void u300_gpio_irq_enable(struct irq_data *d)
{
struct u300_gpio_port *port = irq_data_get_irq_chip_data(d);
struct u300_gpio *gpio = port->gpio;
int offset = d->irq - gpio->irq_base;
int offset = (port->number << 3) + d->hwirq;
u32 val;
unsigned long flags;
dev_dbg(gpio->dev, "enable IRQ for hwirq %lu on port %s, offset %d\n",
d->hwirq, port->name, offset);
local_irq_save(flags);
val = readl(U300_PIN_REG(offset, ien));
writel(val | U300_PIN_BIT(offset), U300_PIN_REG(offset, ien));
......@@ -517,7 +540,7 @@ static void u300_gpio_irq_disable(struct irq_data *d)
{
struct u300_gpio_port *port = irq_data_get_irq_chip_data(d);
struct u300_gpio *gpio = port->gpio;
int offset = d->irq - gpio->irq_base;
int offset = (port->number << 3) + d->hwirq;
u32 val;
unsigned long flags;
......@@ -555,8 +578,7 @@ static void u300_gpio_irq_handler(unsigned irq, struct irq_desc *desc)
int irqoffset;
for_each_set_bit(irqoffset, &val, U300_GPIO_PINS_PER_PORT) {
int pin_irq = gpio->irq_base + (port->number << 3)
+ irqoffset;
int pin_irq = irq_find_mapping(port->domain, irqoffset);
int offset = pinoffset + irqoffset;
dev_dbg(gpio->dev, "GPIO IRQ %d on pin %d\n",
......@@ -631,6 +653,8 @@ static inline void u300_gpio_free_ports(struct u300_gpio *gpio)
list_for_each_safe(p, n, &gpio->port_list) {
port = list_entry(p, struct u300_gpio_port, node);
list_del(&port->node);
if (port->domain)
irq_domain_remove(port->domain);
kfree(port);
}
}
......@@ -653,7 +677,6 @@ static int __init u300_gpio_probe(struct platform_device *pdev)
gpio->chip = u300_gpio_chip;
gpio->chip.ngpio = plat->ports * U300_GPIO_PINS_PER_PORT;
gpio->irq_base = plat->gpio_irq_base;
gpio->chip.dev = &pdev->dev;
gpio->chip.base = plat->gpio_base;
gpio->dev = &pdev->dev;
......@@ -732,18 +755,26 @@ static int __init u300_gpio_probe(struct platform_device *pdev)
port->irq = platform_get_irq_byname(pdev,
port->name);
dev_dbg(gpio->dev, "register IRQ %d for %s\n", port->irq,
dev_dbg(gpio->dev, "register IRQ %d for port %s\n", port->irq,
port->name);
port->domain = irq_domain_add_linear(pdev->dev.of_node,
U300_GPIO_PINS_PER_PORT,
&irq_domain_simple_ops,
port);
if (!port->domain)
goto err_no_domain;
irq_set_chained_handler(port->irq, u300_gpio_irq_handler);
irq_set_handler_data(port->irq, port);
/* For each GPIO pin set the unique IRQ handler */
for (i = 0; i < U300_GPIO_PINS_PER_PORT; i++) {
int irqno = gpio->irq_base + (portno << 3) + i;
int irqno = irq_create_mapping(port->domain, i);
dev_dbg(gpio->dev, "handler for IRQ %d on %s\n",
irqno, port->name);
dev_dbg(gpio->dev, "GPIO%d on port %s gets IRQ %d\n",
gpio->chip.base + (port->number << 3) + i,
port->name, irqno);
irq_set_chip_and_handler(irqno, &u300_gpio_irqchip,
handle_simple_irq);
set_irq_flags(irqno, IRQF_VALID);
......@@ -776,6 +807,7 @@ static int __init u300_gpio_probe(struct platform_device *pdev)
err_no_pinctrl:
err = gpiochip_remove(&gpio->chip);
err_no_chip:
err_no_domain:
err_no_port:
u300_gpio_free_ports(gpio);
iounmap(gpio->base);
......
......@@ -13,13 +13,11 @@
* struct u300_gpio_platform - U300 GPIO platform data
* @ports: number of GPIO block ports
* @gpio_base: first GPIO number for this block (use a free range)
* @gpio_irq_base: first GPIO IRQ number for this block (use a free range)
* @pinctrl_device: pin control device to spawn as child
*/
struct u300_gpio_platform {
u8 ports;
int gpio_base;
int gpio_irq_base;
struct platform_device *pinctrl_device;
};
......
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