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HID cp2112: fix support for multiple gpiochips

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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>
This commit is contained in:
Douglas Gilbert 2021-01-09 17:36:58 -05:00 committed by Jiri Kosina
parent fa8ba6e5dc
commit 2a2b09c867
1 changed files with 11 additions and 11 deletions
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22
drivers/hid/hid-cp2112.c
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@ -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;