acpi_hw_register_read
acpi_status acpi_hw_register_read(u32 register_id, u32 *return_value);
status = acpi_hw_register_read(ACPI_REGISTER_PM1_STATUS, &fixed_status);
acpi_hw_register_read(ACPI_REGISTER_PM1_ENABLE, &fixed_enable);
status = acpi_hw_register_read(ACPI_REGISTER_PM1_ENABLE, &in_enable);
status = acpi_hw_register_read(ACPI_REGISTER_PM1_STATUS, &in_status);
status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL,
status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL,
status = acpi_hw_register_read(bit_reg_info->parent_register,
status = acpi_hw_register_read(bit_reg_info->parent_register,