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extcon: int3496: Add GPIO ACPI mapping table

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In order to make GPIO ACPI library stricter prepare users of
gpiod_get_index() to correctly behave when there no mapping is
provided by firmware.

Here we add explicit mapping between _CRS GpioIo() resources and
their names used in the driver.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
This commit is contained in:
Andy Shevchenko 2017-02-24 14:35:55 +02:00 committed by Chanwoo Choi
parent 90400c5884
commit 8cb2cbae45
2 changed files with 25 additions and 0 deletions
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5
Documentation/extcon/intel-int3496.txt
View File

@ -20,3 +20,8 @@ Index 1: The output gpio for enabling Vbus output from the device to the otg
Index 2: The output gpio for muxing of the data pins between the USB host and
the USB peripheral controller, write 1 to mux to the peripheral
controller
There is a mapping between indices and GPIO connection IDs as follows
id index 0
vbus index 1
mux index 2

20
drivers/extcon/extcon-intel-int3496.c
View File

@ -45,6 +45,17 @@ static const unsigned int int3496_cable[] = {
EXTCON_NONE,
};
static const struct acpi_gpio_params id_gpios = { INT3496_GPIO_USB_ID, 0, false };
static const struct acpi_gpio_params vbus_gpios = { INT3496_GPIO_VBUS_EN, 0, false };
static const struct acpi_gpio_params mux_gpios = { INT3496_GPIO_USB_MUX, 0, false };
static const struct acpi_gpio_mapping acpi_int3496_default_gpios[] = {
{ "id-gpios", &id_gpios, 1 },
{ "vbus-gpios", &vbus_gpios, 1 },
{ "mux-gpios", &mux_gpios, 1 },
{ },
};
static void int3496_do_usb_id(struct work_struct *work)
{
struct int3496_data *data =
@ -83,6 +94,13 @@ static int int3496_probe(struct platform_device *pdev)
struct int3496_data *data;
int ret;
ret = acpi_dev_add_driver_gpios(ACPI_COMPANION(dev),
acpi_int3496_default_gpios);
if (ret) {
dev_err(dev, "can't add GPIO ACPI mapping\n");
return ret;
}
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
@ -154,6 +172,8 @@ static int int3496_remove(struct platform_device *pdev)
devm_free_irq(&pdev->dev, data->usb_id_irq, data);
cancel_delayed_work_sync(&data->work);
acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pdev->dev));
return 0;
}