diff options
| author | Bjorn Helgaas <bjorn.helgaas@hp.com> | 2009-11-17 17:05:19 -0700 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-12-15 17:35:26 -0500 |
| commit | 9065ce4500085b9ca66b19d3c4d21a73cb410173 (patch) | |
| tree | c487e3f9b3b56cc829ea2362a33b888a42d83f8f /include/linux/pnp.h | |
| parent | c4da6940a7a41c72781ff2d62ebd4b99f3749f14 (diff) | |
PNP: add interface to retrieve ACPI device from a PNPACPI device
Add pnp_acpi_device(pnp_dev), which takes a PNP device and returns the
associated ACPI device (or NULL, if the device is not a PNPACPI device).
This allows us to write a PNP driver that can manage both traditional
PNPBIOS and ACPI devices, treating ACPI-only functionality as an optional
extension.
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'include/linux/pnp.h')
| -rw-r--r-- | include/linux/pnp.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/pnp.h b/include/linux/pnp.h index fddfafaed024..7c4193eb0072 100644 --- a/include/linux/pnp.h +++ b/include/linux/pnp.h @@ -334,6 +334,19 @@ extern struct pnp_protocol pnpbios_protocol; #define pnp_device_is_pnpbios(dev) 0 #endif +#ifdef CONFIG_PNPACPI +extern struct pnp_protocol pnpacpi_protocol; + +static inline struct acpi_device *pnp_acpi_device(struct pnp_dev *dev) +{ + if (dev->protocol == &pnpacpi_protocol) + return dev->data; + return NULL; +} +#else +#define pnp_acpi_device(dev) 0 +#endif + /* status */ #define PNP_READY 0x0000 #define PNP_ATTACHED 0x0001 |