diff options
| -rw-r--r-- | src/arch/x86/acpi_device.c | 18 | ||||
| -rw-r--r-- | src/arch/x86/include/arch/acpi_device.h | 1 | ||||
| -rw-r--r-- | src/include/device/device.h | 2 |
3 files changed, 21 insertions, 0 deletions
diff --git a/src/arch/x86/acpi_device.c b/src/arch/x86/acpi_device.c index 47bcc52c1e..57f06498c8 100644 --- a/src/arch/x86/acpi_device.c +++ b/src/arch/x86/acpi_device.c @@ -81,6 +81,24 @@ const char *acpi_device_name(const struct device *dev) return NULL; } +/* Locate and return the ACPI _HID (Hardware ID) for this device */ +const char *acpi_device_hid(const struct device *dev) +{ + if (!dev) + return NULL; + + /* Check for device specific handler */ + if (dev->ops->acpi_hid) + return dev->ops->acpi_hid(dev); + + /* + * Don't walk up the tree to find any parent that can identify this device, as + * PNP devices are hard to identify. + */ + + return NULL; +} + /* Recursive function to find the root device and print a path from there */ static ssize_t acpi_device_path_fill(const struct device *dev, char *buf, size_t buf_len, size_t cur) diff --git a/src/arch/x86/include/arch/acpi_device.h b/src/arch/x86/include/arch/acpi_device.h index d74af9da74..4990df091a 100644 --- a/src/arch/x86/include/arch/acpi_device.h +++ b/src/arch/x86/include/arch/acpi_device.h @@ -63,6 +63,7 @@ struct acpi_dp { struct device; const char *acpi_device_name(const struct device *dev); +const char *acpi_device_hid(const struct device *dev); const char *acpi_device_path(const struct device *dev); const char *acpi_device_scope(const struct device *dev); const char *acpi_device_path_join(const struct device *dev, const char *name); diff --git a/src/include/device/device.h b/src/include/device/device.h index ebf8314096..b2221ccea2 100644 --- a/src/include/device/device.h +++ b/src/include/device/device.h @@ -62,6 +62,8 @@ struct device_operations { void (*acpi_fill_ssdt_generator)(struct device *dev); void (*acpi_inject_dsdt_generator)(struct device *dev); const char *(*acpi_name)(const struct device *dev); + /* Returns the optional _HID (Hardware ID) */ + const char *(*acpi_hid)(const struct device *dev); #endif const struct pci_operations *ops_pci; const struct i2c_bus_operations *ops_i2c_bus; |