[RFC PATCH 10/16] PCI: Add of_scan_bus() to pci_host_info

[Yijing Wang]

Add of_scan_bus() to support some platforms
scan bus by of_node.

Signed-off-by: Yijing Wang <wangyij...@huawei.com>
---
 drivers/pci/host-bridge.c |    1 +
 drivers/pci/probe.c       |   10 +++++++---
 include/linux/pci.h       |    3 +++
 3 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c
index 872cae1..1a1f81b 100644
--- a/drivers/pci/host-bridge.c
+++ b/drivers/pci/host-bridge.c
@@ -52,6 +52,7 @@ struct pci_host_bridge *pci_create_host_bridge(
                return NULL;
 
        host->sysdata = info->arg;
+       host->node = info->node;
        host->busnum = PCI_BUSNUM(db);
        host->domain = PCI_DOMAIN(db);
        host->ops = ops;
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 42158fd..2729c41 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -2126,9 +2126,13 @@ struct pci_host_bridge *pci_scan_host_bridge(
                pci_bus_insert_busn_res(host->bus, host->busnum, 255);
        }
 
-       max = pci_scan_child_bus(host->bus);
-       if (!found)
-               pci_bus_update_busn_res_end(host->bus, max);
+       if (info->of_scan_bus) {
+               info->of_scan_bus(host);
+       } else {
+               max = pci_scan_child_bus(host->bus);
+               if (!found)
+                       pci_bus_update_busn_res_end(host->bus, max);
+       }
 
        return host;
 
diff --git a/include/linux/pci.h b/include/linux/pci.h
index af1ee86..c4f4438 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -407,6 +407,7 @@ struct pci_host_bridge {
        int busnum;
        int domain;
        void *sysdata;
+       struct device_node *node;
        struct pci_ops *ops;
        struct msi_controller *(*get_msi_ctrl)(struct pci_dev *pdev);
        void (*release_fn)(struct pci_host_bridge *);
@@ -416,10 +417,12 @@ struct pci_host_bridge {
 struct pci_host_info {
        u8 res_type;
        void *arg;
+       struct device_node *node;
        struct list_head *resources; /*just for build, will clean up later */
        struct msi_controller *(*get_msi_ctrl)(struct pci_dev *pdev);
        int (*init_res)(struct pci_host_bridge *host, 
                        struct pci_host_info *info);
+       void (*of_scan_bus)(struct pci_host_bridge *host);
 };
 
 static inline void init_pci_host_info(struct pci_host_info *info)
-- 
1.7.1

_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/linuxppc-dev