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| author | Patrick Rudolph <patrick.rudolph@9elements.com> | 2019-08-20 08:20:01 +0200 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2019-08-23 08:16:21 +0000 |
| commit | eeb8e74944488ffbb7aa9a16fb28cc84beb6c353 (patch) | |
| tree | 24df14db8c2033cb49b384844241f09ce053dc02 /src | |
| parent | 3d0df83133642350dc716ab67f77021d47e27d95 (diff) | |
| download | coreboot-eeb8e74944488ffbb7aa9a16fb28cc84beb6c353.tar.xz | |
arch/x86/acpi: Add acpi_device_hid
Allow a driver to return device specific _HID, which will be consumed by
acpigen in order to generate proper SSDTs.
Change-Id: Ibb79eb00c008a3c3cdc12ad2a48b88a055a9216f
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35006
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src')
| -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; |