HID cp2112: fix support for multiple gpiochips

In lk 5.11.0-rc2 connecting a USB based Silicon Labs HID to I2C
bridge evaluation board (CP2112EK) causes this warning:
  gpio gpiochip0: (cp2112_gpio): detected irqchip that is shared
       with multiple gpiochips: please fix the driver

Simply copy what other gpio related drivers do to fix this
particular warning: replicate the struct irq_chip object in each
device instance rather than have a static object which makes that
object (incorrectly) shared by each device.

Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/hid-cp2112.c

@@ -161,6 +161,7 @@ struct cp2112_device {
  atomic_t read_avail;
  atomic_t xfer_avail;
  struct gpio_chip gc;
+ struct irq_chip irq;
  u8 *in_out_buffer;
  struct mutex lock;
 
@@ -1175,16 +1176,6 @@ static int cp2112_gpio_irq_type(struct irq_data *d, unsigned int type)
  return 0;
 }
 
-static struct irq_chip cp2112_gpio_irqchip = {
- .name = "cp2112-gpio",
- .irq_startup = cp2112_gpio_irq_startup,
- .irq_shutdown = cp2112_gpio_irq_shutdown,
- .irq_ack = cp2112_gpio_irq_ack,
- .irq_mask = cp2112_gpio_irq_mask,
- .irq_unmask = cp2112_gpio_irq_unmask,
- .irq_set_type = cp2112_gpio_irq_type,
-};
-
 static int __maybe_unused cp2112_allocate_irq(struct cp2112_device *dev,
  int pin)
 {
@@ -1339,8 +1330,17 @@ static int cp2112_probe(struct hid_device *hdev, const struct hid_device_id *id)
  dev->gc.can_sleep = 1;
  dev->gc.parent = &hdev->dev;
 
+ dev->irq.name = "cp2112-gpio";
+ dev->irq.irq_startup = cp2112_gpio_irq_startup;
+ dev->irq.irq_shutdown = cp2112_gpio_irq_shutdown;
+ dev->irq.irq_ack = cp2112_gpio_irq_ack;
+ dev->irq.irq_mask = cp2112_gpio_irq_mask;
+ dev->irq.irq_unmask = cp2112_gpio_irq_unmask;
+ dev->irq.irq_set_type = cp2112_gpio_irq_type;
+ dev->irq.flags = IRQCHIP_MASK_ON_SUSPEND;
+
  girq = &dev->gc.irq;
- girq->chip = &cp2112_gpio_irqchip;
+ girq->chip = &dev->irq;
  /* The event comes from the outside so no parent handler */
  girq->parent_handler = NULL;
  girq->num_parents = 0;