diff --git a/drivers/platform/x86/dell/Kconfig b/drivers/platform/x86/dell/Kconfig index 85a78ef91182..309236cecd5a 100644 --- a/drivers/platform/x86/dell/Kconfig +++ b/drivers/platform/x86/dell/Kconfig @@ -161,6 +161,7 @@ config DELL_SMO8800 config DELL_UART_BACKLIGHT tristate "Dell AIO UART Backlight driver" depends on ACPI + depends on ACPI_VIDEO depends on BACKLIGHT_CLASS_DEVICE depends on SERIAL_DEV_BUS help diff --git a/drivers/platform/x86/dell/dell-uart-backlight.c b/drivers/platform/x86/dell/dell-uart-backlight.c index 87d2a20b4cb3..3995f90add45 100644 --- a/drivers/platform/x86/dell/dell-uart-backlight.c +++ b/drivers/platform/x86/dell/dell-uart-backlight.c @@ -20,6 +20,7 @@ #include #include #include +#include #include "../serdev_helpers.h" /* The backlight controller must respond within 1 second */ @@ -332,10 +333,17 @@ struct serdev_device_driver dell_uart_bl_serdev_driver = { static int dell_uart_bl_pdev_probe(struct platform_device *pdev) { + enum acpi_backlight_type bl_type; struct serdev_device *serdev; struct device *ctrl_dev; int ret; + bl_type = acpi_video_get_backlight_type(); + if (bl_type != acpi_backlight_dell_uart) { + dev_dbg(&pdev->dev, "Not loading (ACPI backlight type = %d)\n", bl_type); + return -ENODEV; + } + ctrl_dev = get_serdev_controller("DELL0501", NULL, 0, "serial0"); if (IS_ERR(ctrl_dev)) return PTR_ERR(ctrl_dev);