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gpio/mxs: adopt irq_domain support for mxs gpio driver

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Remove irq_domain_add_legacy call from mach-mxs.c and have the gpio
driver adopt irqdomain support, so that we can have the mapping
between gpio and irq number available without using virtual_irq_start
and MXS_GPIO_IRQ_START.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Shawn Guo 2012-08-20 16:43:32 +08:00
parent d9875690d9
commit 0b76c54121
2 changed files with 30 additions and 30 deletions
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12
arch/arm/mach-mxs/mach-mxs.c
View File

@ -113,20 +113,8 @@ static int __init mxs_icoll_add_irq_domain(struct device_node *np,
return 0;
}
static int __init mxs_gpio_add_irq_domain(struct device_node *np,
struct device_node *interrupt_parent)
{
static int gpio_irq_base = MXS_GPIO_IRQ_START;
irq_domain_add_legacy(np, 32, gpio_irq_base, 0, &irq_domain_simple_ops, NULL);
gpio_irq_base += 32;
return 0;
}
static const struct of_device_id mxs_irq_match[] __initconst = {
{ .compatible = "fsl,mxs-icoll", .data = mxs_icoll_add_irq_domain, },
{ .compatible = "fsl,mxs-gpio", .data = mxs_gpio_add_irq_domain, },
{ /* sentinel */ }
};

48
drivers/gpio/gpio-mxs.c
View File

@ -24,6 +24,7 @@
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/gpio.h>
#include <linux/of.h>
#include <linux/of_address.h>
@ -52,8 +53,6 @@
#define GPIO_INT_LEV_MASK (1 << 0)
#define GPIO_INT_POL_MASK (1 << 1)
#define irq_to_gpio(irq) ((irq) - MXS_GPIO_IRQ_START)
enum mxs_gpio_id {
IMX23_GPIO,
IMX28_GPIO,
@ -63,7 +62,7 @@ struct mxs_gpio_port {
void __iomem *base;
int id;
int irq;
int virtual_irq_start;
struct irq_domain *domain;
struct bgpio_chip bgc;
enum mxs_gpio_id devid;
};
@ -82,8 +81,7 @@ static inline int is_imx28_gpio(struct mxs_gpio_port *port)
static int mxs_gpio_set_irq_type(struct irq_data *d, unsigned int type)
{
u32 gpio = irq_to_gpio(d->irq);
u32 pin_mask = 1 << (gpio & 31);
u32 pin_mask = 1 << d->hwirq;
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
struct mxs_gpio_port *port = gc->private;
void __iomem *pin_addr;
@ -120,7 +118,7 @@ static int mxs_gpio_set_irq_type(struct irq_data *d, unsigned int type)
else
writel(pin_mask, pin_addr + MXS_CLR);
writel(1 << (gpio & 0x1f),
writel(pin_mask,
port->base + PINCTRL_IRQSTAT(port) + MXS_CLR);
return 0;
@ -131,7 +129,6 @@ static void mxs_gpio_irq_handler(u32 irq, struct irq_desc *desc)
{
u32 irq_stat;
struct mxs_gpio_port *port = irq_get_handler_data(irq);
u32 gpio_irq_no_base = port->virtual_irq_start;
desc->irq_data.chip->irq_ack(&desc->irq_data);
@ -140,7 +137,7 @@ static void mxs_gpio_irq_handler(u32 irq, struct irq_desc *desc)
while (irq_stat != 0) {
int irqoffset = fls(irq_stat) - 1;
generic_handle_irq(gpio_irq_no_base + irqoffset);
generic_handle_irq(irq_find_mapping(port->domain, irqoffset));
irq_stat &= ~(1 << irqoffset);
}
}
@ -167,12 +164,12 @@ static int mxs_gpio_set_wake_irq(struct irq_data *d, unsigned int enable)
return 0;
}
static void __init mxs_gpio_init_gc(struct mxs_gpio_port *port)
static void __init mxs_gpio_init_gc(struct mxs_gpio_port *port, int irq_base)
{
struct irq_chip_generic *gc;
struct irq_chip_type *ct;
gc = irq_alloc_generic_chip("gpio-mxs", 1, port->virtual_irq_start,
gc = irq_alloc_generic_chip("gpio-mxs", 1, irq_base,
port->base, handle_level_irq);
gc->private = port;
@ -194,7 +191,7 @@ static int mxs_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
struct mxs_gpio_port *port =
container_of(bgc, struct mxs_gpio_port, bgc);
return port->virtual_irq_start + offset;
return irq_find_mapping(port->domain, offset);
}
static struct platform_device_id mxs_gpio_ids[] = {
@ -226,6 +223,7 @@ static int __devinit mxs_gpio_probe(struct platform_device *pdev)
static void __iomem *base;
struct mxs_gpio_port *port;
struct resource *iores = NULL;
int irq_base;
int err;
port = devm_kzalloc(&pdev->dev, sizeof(*port), GFP_KERNEL);
@ -241,7 +239,6 @@ static int __devinit mxs_gpio_probe(struct platform_device *pdev)
port->id = pdev->id;
port->devid = pdev->id_entry->driver_data;
}
port->virtual_irq_start = MXS_GPIO_IRQ_START + port->id * 32;
port->irq = platform_get_irq(pdev, 0);
if (port->irq < 0)
@ -275,8 +272,19 @@ static int __devinit mxs_gpio_probe(struct platform_device *pdev)
/* clear address has to be used to clear IRQSTAT bits */
writel(~0U, port->base + PINCTRL_IRQSTAT(port) + MXS_CLR);
irq_base = irq_alloc_descs(-1, 0, 32, numa_node_id());
if (irq_base < 0)
return irq_base;
port->domain = irq_domain_add_legacy(np, 32, irq_base, 0,
&irq_domain_simple_ops, NULL);
if (!port->domain) {
err = -ENODEV;
goto out_irqdesc_free;
}
/* gpio-mxs can be a generic irq chip */
mxs_gpio_init_gc(port);
mxs_gpio_init_gc(port, irq_base);
/* setup one handler for each entry */
irq_set_chained_handler(port->irq, mxs_gpio_irq_handler);
@ -287,18 +295,22 @@ static int __devinit mxs_gpio_probe(struct platform_device *pdev)
port->base + PINCTRL_DOUT(port), NULL,
port->base + PINCTRL_DOE(port), NULL, 0);
if (err)
return err;
goto out_irqdesc_free;
port->bgc.gc.to_irq = mxs_gpio_to_irq;
port->bgc.gc.base = port->id * 32;
err = gpiochip_add(&port->bgc.gc);
if (err) {
bgpio_remove(&port->bgc);
return err;
}
if (err)
goto out_bgpio_remove;
return 0;
out_bgpio_remove:
bgpio_remove(&port->bgc);
out_irqdesc_free:
irq_free_descs(irq_base, 32);
return err;
}
static struct platform_driver mxs_gpio_driver = {