diff options
| author |   Iwona Winiarska <iwona.winiarska@intel.com> | 2022-02-08 16:36:34 +0100 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-02-09 08:04:44 +0100 |
| commit | 6b8145b054b27319dddaad4abbb5184e343375da (patch) | |
| tree | 605b9acd203fc0d5be14fa6c498bbaf4b900e472 /drivers/peci/core.c | |
| parent | peci: Add sysfs interface for PECI bus (diff) | |
| download | linux-dev-6b8145b054b27319dddaad4abbb5184e343375da.tar.xz linux-dev-6b8145b054b27319dddaad4abbb5184e343375da.zip | |
peci: Add support for PECI device drivers
Add support for PECI device drivers, which unlike PECI controller
drivers are actually able to provide functionalities to userspace.
Also, extend peci_request API to allow querying more details about PECI
device (e.g. model/family), that's going to be used to find a compatible
peci_driver.
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Acked-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com>
Link: https://lore.kernel.org/r/20220208153639.255278-9-iwona.winiarska@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/peci/core.c')
| -rw-r--r-- | drivers/peci/core.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/drivers/peci/core.c b/drivers/peci/core.c index e993615cf521..9c8cf07e51c7 100644 --- a/drivers/peci/core.c +++ b/drivers/peci/core.c @@ -160,8 +160,52 @@ err_put: } EXPORT_SYMBOL_NS_GPL(devm_peci_controller_add, PECI); +static const struct peci_device_id * +peci_bus_match_device_id(const struct peci_device_id *id, struct peci_device *device) +{ + while (id->family != 0) { + if (id->family == device->info.family && + id->model == device->info.model) + return id; + id++; + } + + return NULL; +} + +static int peci_bus_device_match(struct device *dev, struct device_driver *drv) +{ + struct peci_device *device = to_peci_device(dev); + struct peci_driver *peci_drv = to_peci_driver(drv); + + if (dev->type != &peci_device_type) + return 0; + + return !!peci_bus_match_device_id(peci_drv->id_table, device); +} + +static int peci_bus_device_probe(struct device *dev) +{ + struct peci_device *device = to_peci_device(dev); + struct peci_driver *driver = to_peci_driver(dev->driver); + + return driver->probe(device, peci_bus_match_device_id(driver->id_table, device)); +} + +static void peci_bus_device_remove(struct device *dev) +{ + struct peci_device *device = to_peci_device(dev); + struct peci_driver *driver = to_peci_driver(dev->driver); + + if (driver->remove) + driver->remove(device); +} + struct bus_type peci_bus_type = { .name = "peci", + .match = peci_bus_device_match, + .probe = peci_bus_device_probe, + .remove = peci_bus_device_remove, .bus_groups = peci_bus_groups, }; |