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gpio: rcar: Switch to use gpiolib irqchip helpers

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Switch the R-Car Gen2 GPIO driver to use the gpiolib irqchip helpers.

While doing this also make sure that gpiochip_irqchip_add() is called
after the gpiochip itself is registered, as required.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Geert Uytterhoeven 2015-01-12 11:07:59 +01:00 committed by Linus Walleij
parent 7d82bf3419
commit c7f3c5d3ac
2 changed files with 24 additions and 46 deletions
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1
drivers/gpio/Kconfig
View File

@ -286,6 +286,7 @@ config GPIO_PXA
config GPIO_RCAR
tristate "Renesas R-Car GPIO"
depends on ARM && (ARCH_SHMOBILE || COMPILE_TEST)
select GPIOLIB_IRQCHIP
help
Say yes here to support GPIO on Renesas R-Car SoCs.

69
drivers/gpio/gpio-rcar.c
View File

@ -21,7 +21,6 @@
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/pinctrl/consumer.h>
@ -38,7 +37,6 @@ struct gpio_rcar_priv {
struct platform_device *pdev;
struct gpio_chip gpio_chip;
struct irq_chip irq_chip;
struct irq_domain *irq_domain;
};
#define IOINTSEL 0x00
@ -82,14 +80,18 @@ static void gpio_rcar_modify_bit(struct gpio_rcar_priv *p, int offs,
static void gpio_rcar_irq_disable(struct irq_data *d)
{
struct gpio_rcar_priv *p = irq_data_get_irq_chip_data(d);
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct gpio_rcar_priv *p = container_of(gc, struct gpio_rcar_priv,
gpio_chip);
gpio_rcar_write(p, INTMSK, ~BIT(irqd_to_hwirq(d)));
}
static void gpio_rcar_irq_enable(struct irq_data *d)
{
struct gpio_rcar_priv *p = irq_data_get_irq_chip_data(d);
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct gpio_rcar_priv *p = container_of(gc, struct gpio_rcar_priv,
gpio_chip);
gpio_rcar_write(p, MSKCLR, BIT(irqd_to_hwirq(d)));
}
@ -131,7 +133,9 @@ static void gpio_rcar_config_interrupt_input_mode(struct gpio_rcar_priv *p,
static int gpio_rcar_irq_set_type(struct irq_data *d, unsigned int type)
{
struct gpio_rcar_priv *p = irq_data_get_irq_chip_data(d);
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct gpio_rcar_priv *p = container_of(gc, struct gpio_rcar_priv,
gpio_chip);
unsigned int hwirq = irqd_to_hwirq(d);
dev_dbg(&p->pdev->dev, "sense irq = %d, type = %d\n", hwirq, type);
@ -175,7 +179,8 @@ static irqreturn_t gpio_rcar_irq_handler(int irq, void *dev_id)
gpio_rcar_read(p, INTMSK))) {
offset = __ffs(pending);
gpio_rcar_write(p, INTCLR, BIT(offset));
generic_handle_irq(irq_find_mapping(p->irq_domain, offset));
generic_handle_irq(irq_find_mapping(p->gpio_chip.irqdomain,
offset));
irqs_handled++;
}
@ -265,29 +270,6 @@ static int gpio_rcar_direction_output(struct gpio_chip *chip, unsigned offset,
return 0;
}
static int gpio_rcar_to_irq(struct gpio_chip *chip, unsigned offset)
{
return irq_create_mapping(gpio_to_priv(chip)->irq_domain, offset);
}
static int gpio_rcar_irq_domain_map(struct irq_domain *h, unsigned int irq,
irq_hw_number_t hwirq)
{
struct gpio_rcar_priv *p = h->host_data;
dev_dbg(&p->pdev->dev, "map hw irq = %d, irq = %d\n", (int)hwirq, irq);
irq_set_chip_data(irq, h->host_data);
irq_set_chip_and_handler(irq, &p->irq_chip, handle_level_irq);
set_irq_flags(irq, IRQF_VALID); /* kill me now */
return 0;
}
static struct irq_domain_ops gpio_rcar_irq_domain_ops = {
.map = gpio_rcar_irq_domain_map,
.xlate = irq_domain_xlate_twocell,
};
struct gpio_rcar_info {
bool has_both_edge_trigger;
};
@ -411,7 +393,6 @@ static int gpio_rcar_probe(struct platform_device *pdev)
gpio_chip->get = gpio_rcar_get;
gpio_chip->direction_output = gpio_rcar_direction_output;
gpio_chip->set = gpio_rcar_set;
gpio_chip->to_irq = gpio_rcar_to_irq;
gpio_chip->label = name;
gpio_chip->dev = dev;
gpio_chip->owner = THIS_MODULE;
@ -426,16 +407,19 @@ static int gpio_rcar_probe(struct platform_device *pdev)
irq_chip->flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_SET_TYPE_MASKED
| IRQCHIP_MASK_ON_SUSPEND;
p->irq_domain = irq_domain_add_simple(pdev->dev.of_node,
p->config.number_of_pins,
p->config.irq_base,
&gpio_rcar_irq_domain_ops, p);
if (!p->irq_domain) {
ret = -ENXIO;
dev_err(dev, "cannot initialize irq domain\n");
ret = gpiochip_add(gpio_chip);
if (ret) {
dev_err(dev, "failed to add GPIO controller\n");
goto err0;
}
ret = gpiochip_irqchip_add(&p->gpio_chip, irq_chip, p->config.irq_base,
handle_level_irq, IRQ_TYPE_NONE);
if (ret) {
dev_err(dev, "cannot add irqchip\n");
goto err1;
}
if (devm_request_irq(dev, irq->start, gpio_rcar_irq_handler,
IRQF_SHARED, name, p)) {
dev_err(dev, "failed to request IRQ\n");
@ -443,17 +427,11 @@ static int gpio_rcar_probe(struct platform_device *pdev)
goto err1;
}
ret = gpiochip_add(gpio_chip);
if (ret) {
dev_err(dev, "failed to add GPIO controller\n");
goto err1;
}
dev_info(dev, "driving %d GPIOs\n", p->config.number_of_pins);
/* warn in case of mismatch if irq base is specified */
if (p->config.irq_base) {
ret = irq_find_mapping(p->irq_domain, 0);
ret = irq_find_mapping(p->gpio_chip.irqdomain, 0);
if (p->config.irq_base != ret)
dev_warn(dev, "irq base mismatch (%u/%u)\n",
p->config.irq_base, ret);
@ -469,7 +447,7 @@ static int gpio_rcar_probe(struct platform_device *pdev)
return 0;
err1:
irq_domain_remove(p->irq_domain);
gpiochip_remove(&p->gpio_chip);
err0:
pm_runtime_put(dev);
pm_runtime_disable(dev);
@ -482,7 +460,6 @@ static int gpio_rcar_remove(struct platform_device *pdev)
gpiochip_remove(&p->gpio_chip);
irq_domain_remove(p->irq_domain);
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
return 0;