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gpio: mockup: use irq_sim

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Shrink the driver by removing the code dealing with dummy interrupts
and replacing it with calls to the irq_sim API.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Bartosz Golaszewski 2017-08-14 13:20:56 +02:00 committed by Linus Walleij
parent 4342ec5fba
commit b4c495f03a
2 changed files with 8 additions and 71 deletions
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2
drivers/gpio/Kconfig
View File

@ -311,7 +311,7 @@ config GPIO_MOCKUP
depends on GPIOLIB && SYSFS
select GPIO_SYSFS
select GPIOLIB_IRQCHIP
select IRQ_WORK
select IRQ_SIM
help
This enables GPIO Testing driver, which provides a way to test GPIO
subsystem through sysfs(or char device) and debugfs. GPIO_SYSFS

77
drivers/gpio/gpio-mockup.c
View File

@ -20,7 +20,7 @@
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irq_work.h>
#include <linux/irq_sim.h>
#include <linux/debugfs.h>
#include <linux/uaccess.h>
@ -47,18 +47,12 @@ enum {
struct gpio_mockup_line_status {
int dir;
bool value;
bool irq_enabled;
};
struct gpio_mockup_irq_context {
struct irq_work work;
int irq;
};
struct gpio_mockup_chip {
struct gpio_chip gc;
struct gpio_mockup_line_status *lines;
struct gpio_mockup_irq_context irq_ctx;
struct irq_sim irqsim;
struct dentry *dbg_dir;
};
@ -144,65 +138,11 @@ static int gpio_mockup_name_lines(struct device *dev,
return 0;
}
static int gpio_mockup_to_irq(struct gpio_chip *chip, unsigned int offset)
static int gpio_mockup_to_irq(struct gpio_chip *gc, unsigned int offset)
{
return chip->irq_base + offset;
}
static void gpio_mockup_irqmask(struct irq_data *data)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(data);
struct gpio_mockup_chip *chip = gpiochip_get_data(gc);
chip->lines[data->irq - gc->irq_base].irq_enabled = false;
}
static void gpio_mockup_irqunmask(struct irq_data *data)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(data);
struct gpio_mockup_chip *chip = gpiochip_get_data(gc);
chip->lines[data->irq - gc->irq_base].irq_enabled = true;
}
static struct irq_chip gpio_mockup_irqchip = {
.name = GPIO_MOCKUP_NAME,
.irq_mask = gpio_mockup_irqmask,
.irq_unmask = gpio_mockup_irqunmask,
};
static void gpio_mockup_handle_irq(struct irq_work *work)
{
struct gpio_mockup_irq_context *irq_ctx;
irq_ctx = container_of(work, struct gpio_mockup_irq_context, work);
handle_simple_irq(irq_to_desc(irq_ctx->irq));
}
static int gpio_mockup_irqchip_setup(struct device *dev,
struct gpio_mockup_chip *chip)
{
struct gpio_chip *gc = &chip->gc;
int irq_base, i;
irq_base = devm_irq_alloc_descs(dev, -1, 0, gc->ngpio, 0);
if (irq_base < 0)
return irq_base;
gc->irq_base = irq_base;
gc->irqchip = &gpio_mockup_irqchip;
for (i = 0; i < gc->ngpio; i++) {
irq_set_chip(irq_base + i, gc->irqchip);
irq_set_chip_data(irq_base + i, gc);
irq_set_handler(irq_base + i, &handle_simple_irq);
irq_modify_status(irq_base + i,
IRQ_NOREQUEST | IRQ_NOAUTOEN, IRQ_NOPROBE);
}
init_irq_work(&chip->irq_ctx.work, gpio_mockup_handle_irq);
return 0;
return irq_sim_irqnum(&chip->irqsim, offset);
}
static ssize_t gpio_mockup_event_write(struct file *file,
@ -228,11 +168,8 @@ static ssize_t gpio_mockup_event_write(struct file *file,
chip = priv->chip;
gc = &chip->gc;
if (chip->lines[priv->offset].irq_enabled) {
gpiod_set_value_cansleep(desc, val);
priv->chip->irq_ctx.irq = gc->irq_base + priv->offset;
irq_work_queue(&priv->chip->irq_ctx.work);
}
gpiod_set_value_cansleep(desc, val);
irq_sim_fire(&chip->irqsim, priv->offset);
return size;
}
@ -319,7 +256,7 @@ static int gpio_mockup_add(struct device *dev,
return ret;
}
ret = gpio_mockup_irqchip_setup(dev, chip);
ret = devm_irq_sim_init(dev, &chip->irqsim, gc->ngpio);
if (ret)
return ret;