[U-Boot] [PATCH 1/2] pci: Add find_hose_by_cfg_addr() helper function

[Kumar Gala <galak@kernel.crashing.org>]

Being able to get back a pci_controller struct back by searching for it
means we can do things like dynamically allocate them or not have to
expose the static structures to all users.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
---
 drivers/pci/pci.c |   11 +++++++++++
 include/pci.h     |    1 +
 2 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 702ac67..74ef4ec 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -165,6 +165,17 @@ struct pci_controller *pci_bus_to_hose (int bus)
 	return NULL;
 }
 
+struct pci_controller *find_hose_by_cfg_addr(void *cfg_addr)
+{
+	struct pci_controller *hose;
+
+	for (hose = hose_head; hose; hose = hose->next)
+		if (hose->cfg_addr == cfg_addr)
+			return hose;
+
+	return NULL;
+}
+
 int pci_last_busno(void)
 {
 	struct pci_controller *hose = hose_head;
diff --git a/include/pci.h b/include/pci.h
index c456006..e80b6bd 100644
--- a/include/pci.h
+++ b/include/pci.h
@@ -511,6 +511,7 @@ extern int pci_hose_write_config_word_via_dword(struct pci_controller *hose,
 extern void *pci_map_bar(pci_dev_t pdev, int bar, int flags);
 extern void pci_register_hose(struct pci_controller* hose);
 extern struct pci_controller* pci_bus_to_hose(int bus);
+extern struct pci_controller *find_hose_by_cfg_addr(void *cfg_addr);
 
 extern int pci_hose_scan(struct pci_controller *hose);
 extern int pci_hose_scan_bus(struct pci_controller *hose, int bus);
-- 
1.7.2.3