diff options
Diffstat (limited to 'drivers/hid/i2c-hid/i2c-hid.c')
| -rw-r--r-- | drivers/hid/i2c-hid/i2c-hid.c | 68 |
1 files changed, 50 insertions, 18 deletions
diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c index 36053f33d6d9..ab4dd952b6ba 100644 --- a/drivers/hid/i2c-hid/i2c-hid.c +++ b/drivers/hid/i2c-hid/i2c-hid.c @@ -37,6 +37,7 @@ #include <linux/mutex.h> #include <linux/acpi.h> #include <linux/of.h> +#include <linux/gpio/consumer.h> #include <linux/i2c/i2c-hid.h> @@ -144,6 +145,8 @@ struct i2c_hid { unsigned long flags; /* device flags */ wait_queue_head_t wait; /* For waiting the interrupt */ + struct gpio_desc *desc; + int irq; struct i2c_hid_platform_data pdata; }; @@ -785,16 +788,16 @@ static int i2c_hid_init_irq(struct i2c_client *client) struct i2c_hid *ihid = i2c_get_clientdata(client); int ret; - dev_dbg(&client->dev, "Requesting IRQ: %d\n", client->irq); + dev_dbg(&client->dev, "Requesting IRQ: %d\n", ihid->irq); - ret = request_threaded_irq(client->irq, NULL, i2c_hid_irq, + ret = request_threaded_irq(ihid->irq, NULL, i2c_hid_irq, IRQF_TRIGGER_LOW | IRQF_ONESHOT, client->name, ihid); if (ret < 0) { dev_warn(&client->dev, "Could not register for %s interrupt, irq = %d," " ret = %d\n", - client->name, client->irq, ret); + client->name, ihid->irq, ret); return ret; } @@ -841,6 +844,14 @@ static int i2c_hid_fetch_hid_descriptor(struct i2c_hid *ihid) } #ifdef CONFIG_ACPI + +/* Default GPIO mapping */ +static const struct acpi_gpio_params i2c_hid_irq_gpio = { 0, 0, true }; +static const struct acpi_gpio_mapping i2c_hid_acpi_gpios[] = { + { "gpios", &i2c_hid_irq_gpio, 1 }, + { }, +}; + static int i2c_hid_acpi_pdata(struct i2c_client *client, struct i2c_hid_platform_data *pdata) { @@ -866,7 +877,7 @@ static int i2c_hid_acpi_pdata(struct i2c_client *client, pdata->hid_descriptor_address = obj->integer.value; ACPI_FREE(obj); - return 0; + return acpi_dev_add_driver_gpios(adev, i2c_hid_acpi_gpios); } static const struct acpi_device_id i2c_hid_acpi_match[] = { @@ -930,12 +941,6 @@ static int i2c_hid_probe(struct i2c_client *client, dbg_hid("HID probe called for i2c 0x%02x\n", client->addr); - if (!client->irq) { - dev_err(&client->dev, - "HID over i2c has not been provided an Int IRQ\n"); - return -EINVAL; - } - ihid = kzalloc(sizeof(struct i2c_hid), GFP_KERNEL); if (!ihid) return -ENOMEM; @@ -955,6 +960,23 @@ static int i2c_hid_probe(struct i2c_client *client, ihid->pdata = *platform_data; } + if (client->irq > 0) { + ihid->irq = client->irq; + } else if (ACPI_COMPANION(&client->dev)) { + ihid->desc = gpiod_get(&client->dev, NULL, GPIOD_IN); + if (IS_ERR(ihid->desc)) { + dev_err(&client->dev, "Failed to get GPIO interrupt\n"); + return PTR_ERR(ihid->desc); + } + + ihid->irq = gpiod_to_irq(ihid->desc); + if (ihid->irq < 0) { + gpiod_put(ihid->desc); + dev_err(&client->dev, "Failed to convert GPIO to IRQ\n"); + return ihid->irq; + } + } + i2c_set_clientdata(client, ihid); ihid->client = client; @@ -1017,13 +1039,16 @@ err_mem_free: hid_destroy_device(hid); err_irq: - free_irq(client->irq, ihid); + free_irq(ihid->irq, ihid); err_pm: pm_runtime_put_noidle(&client->dev); pm_runtime_disable(&client->dev); err: + if (ihid->desc) + gpiod_put(ihid->desc); + i2c_hid_free_buffers(ihid); kfree(ihid); return ret; @@ -1042,13 +1067,18 @@ static int i2c_hid_remove(struct i2c_client *client) hid = ihid->hid; hid_destroy_device(hid); - free_irq(client->irq, ihid); + free_irq(ihid->irq, ihid); if (ihid->bufsize) i2c_hid_free_buffers(ihid); + if (ihid->desc) + gpiod_put(ihid->desc); + kfree(ihid); + acpi_dev_remove_driver_gpios(ACPI_COMPANION(&client->dev)); + return 0; } @@ -1060,9 +1090,9 @@ static int i2c_hid_suspend(struct device *dev) struct hid_device *hid = ihid->hid; int ret = 0; - disable_irq(client->irq); + disable_irq(ihid->irq); if (device_may_wakeup(&client->dev)) - enable_irq_wake(client->irq); + enable_irq_wake(ihid->irq); if (hid->driver && hid->driver->suspend) ret = hid->driver->suspend(hid, PMSG_SUSPEND); @@ -1080,13 +1110,13 @@ static int i2c_hid_resume(struct device *dev) struct i2c_hid *ihid = i2c_get_clientdata(client); struct hid_device *hid = ihid->hid; - enable_irq(client->irq); + enable_irq(ihid->irq); ret = i2c_hid_hwreset(client); if (ret) return ret; if (device_may_wakeup(&client->dev)) - disable_irq_wake(client->irq); + disable_irq_wake(ihid->irq); if (hid->driver && hid->driver->reset_resume) { ret = hid->driver->reset_resume(hid); @@ -1101,17 +1131,19 @@ static int i2c_hid_resume(struct device *dev) static int i2c_hid_runtime_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); + struct i2c_hid *ihid = i2c_get_clientdata(client); i2c_hid_set_power(client, I2C_HID_PWR_SLEEP); - disable_irq(client->irq); + disable_irq(ihid->irq); return 0; } static int i2c_hid_runtime_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); + struct i2c_hid *ihid = i2c_get_clientdata(client); - enable_irq(client->irq); + enable_irq(ihid->irq); i2c_hid_set_power(client, I2C_HID_PWR_ON); return 0; } |