libnvdimm: Add of_node to region and bus descriptors

We want to be able to cross reference the region and bus devices
with the device tree node that they were spawned from. libNVDIMM
handles creating the actual devices for these internally, so we
need to pass in a pointer to the relevant node in the descriptor.

Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
index 0ebc8c4..a640236 100644 (file)
--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -358,6 +358,7 @@ struct nvdimm_bus *nvdimm_bus_register(struct device *parent,
        nvdimm_bus->dev.release = nvdimm_bus_release;
        nvdimm_bus->dev.groups = nd_desc->attr_groups;
        nvdimm_bus->dev.bus = &nvdimm_bus_type;
+       nvdimm_bus->dev.of_node = nd_desc->of_node;
        dev_set_name(&nvdimm_bus->dev, "ndbus%d", nvdimm_bus->id);
        rc = device_register(&nvdimm_bus->dev);
        if (rc) {

diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c
index 0af275c..9f9a33e 100644 (file)
--- a/drivers/nvdimm/region_devs.c
+++ b/drivers/nvdimm/region_devs.c
@@ -1013,6 +1013,7 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus,
        dev->parent = &nvdimm_bus->dev;
        dev->type = dev_type;
        dev->groups = ndr_desc->attr_groups;
+       dev->of_node = ndr_desc->of_node;
        nd_region->ndr_size = resource_size(ndr_desc->res);
        nd_region->ndr_start = ndr_desc->res->start;
        nd_device_register(dev);

diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h
index e0684a6..097072c 100644 (file)
--- a/include/linux/libnvdimm.h
+++ b/include/linux/libnvdimm.h
@@ -76,12 +76,14 @@ typedef int (*ndctl_fn)(struct nvdimm_bus_descriptor *nd_desc,
                struct nvdimm *nvdimm, unsigned int cmd, void *buf,
                unsigned int buf_len, int *cmd_rc);
 
+struct device_node;
 struct nvdimm_bus_descriptor {
        const struct attribute_group **attr_groups;
        unsigned long bus_dsm_mask;
        unsigned long cmd_mask;
        struct module *module;
        char *provider_name;
+       struct device_node *of_node;
        ndctl_fn ndctl;
        int (*flush_probe)(struct nvdimm_bus_descriptor *nd_desc);
        int (*clear_to_send)(struct nvdimm_bus_descriptor *nd_desc,
@@ -123,6 +125,7 @@ struct nd_region_desc {
        int num_lanes;
        int numa_node;
        unsigned long flags;
+       struct device_node *of_node;
 };
 
 struct device;