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Subject[PATCH v3 3/3] gpio: mockup: use irq_sim
Date
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>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
---
drivers/gpio/Kconfig | 2 +-
drivers/gpio/gpio-mockup.c | 77 +++++-----------------------------------------
2 files changed, 8 insertions(+), 71 deletions(-)

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 461d6fc3688b..f858faa5731a 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -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
diff --git a/drivers/gpio/gpio-mockup.c b/drivers/gpio/gpio-mockup.c
index a6565e128f9e..6db7163e6d98 100644
--- a/drivers/gpio/gpio-mockup.c
+++ b/drivers/gpio/gpio-mockup.c
@@ -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)
-{
- return chip->irq_base + offset;
-}
-
-static void gpio_mockup_irqmask(struct irq_data *data)
+static int gpio_mockup_to_irq(struct gpio_chip *gc, unsigned int offset)
{
- 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;

--
2.13.2
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