The driver has a tristate Kconfig symbol so it can be built as a module, but it doesn't export the device aliases in the module. So if the driver is built as module, autoload won't work since udev/kmod won't be able to match the registered ACPI device with its corresponding driver module.
Use the MODULE_DEVICE_TABLE() macro to export the ACPI device as alias. Before this patch: $ modinfo drivers/mfd/intel_soc_pmic_chtwc.ko | grep alias $ After this patch $ modinfo drivers/mfd/intel_soc_pmic_chtwc.ko | grep alias alias: acpi*:INT34D3:* Signed-off-by: Javier Martinez Canillas <[email protected]> --- drivers/mfd/intel_soc_pmic_chtwc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/mfd/intel_soc_pmic_chtwc.c b/drivers/mfd/intel_soc_pmic_chtwc.c index ca01ecd1e546..b8b38d164981 100644 --- a/drivers/mfd/intel_soc_pmic_chtwc.c +++ b/drivers/mfd/intel_soc_pmic_chtwc.c @@ -212,6 +212,7 @@ static const struct acpi_device_id cht_wc_acpi_ids[] = { { "INT34D3", }, { } }; +MODULE_DEVICE_TABLE(acpi, cht_wc_acpi_ids); static struct i2c_driver cht_wc_driver = { .driver = { -- 2.13.3
