bus: mvebu-mbus: Add new API for window creation

We add an API to create MBus address decoding windows from the target
ID and attribute. This function will be used later and deprecate the
current name based scheme.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

2 files changed, 31 insertions, 8 deletions

diff --git a/drivers/bus/mvebu-mbus.c b/drivers/bus/mvebu-mbus.c
index 33c6947eebec..827468abb236 100644
--- a/drivers/bus/mvebu-mbus.c
+++ b/drivers/bus/mvebu-mbus.c
@@ -748,6 +748,22 @@ static const struct of_device_id of_mvebu_mbus_ids[] = {
 /*
  * Public API of the driver
  */
+int mvebu_mbus_add_window_remap_by_id(unsigned int target,
+				      unsigned int attribute,
+				      phys_addr_t base, size_t size,
+				      phys_addr_t remap)
+{
+	struct mvebu_mbus_state *s = &mbus_state;
+
+	if (!mvebu_mbus_window_conflicts(s, base, size, target, attribute)) {
+		pr_err("cannot add window '%x:%x', conflicts with another window\n",
+		       target, attribute);
+		return -EINVAL;
+	}
+
+	return mvebu_mbus_alloc_window(s, base, size, remap, target, attribute);
+}
+
 int mvebu_mbus_add_window_remap_flags(const char *devname, phys_addr_t base,
 				      size_t size, phys_addr_t remap,
 				      unsigned int flags)
@@ -776,14 +792,8 @@ int mvebu_mbus_add_window_remap_flags(const char *devname, phys_addr_t base,
 	else if (flags == MVEBU_MBUS_PCI_WA)
 		attr |= 0x28;
 
-	if (!mvebu_mbus_window_conflicts(s, base, size, target, attr)) {
-		pr_err("cannot add window '%s', conflicts with another window\n",
-		       devname);
-		return -EINVAL;
-	}
-
-	return mvebu_mbus_alloc_window(s, base, size, remap, target, attr);
-
+	return mvebu_mbus_add_window_remap_by_id(target, attr, base,
+						 size, remap);
 }
 
 int mvebu_mbus_add_window(const char *devname, phys_addr_t base, size_t size)
@@ -792,6 +802,13 @@ int mvebu_mbus_add_window(const char *devname, phys_addr_t base, size_t size)
 						 MVEBU_MBUS_NO_REMAP, 0);
 }
 
+int mvebu_mbus_add_window_by_id(unsigned int target, unsigned int attribute,
+				phys_addr_t base, size_t size)
+{
+	return mvebu_mbus_add_window_remap_by_id(target, attribute, base,
+						 size, MVEBU_MBUS_NO_REMAP);
+}
+
 int mvebu_mbus_del_window(phys_addr_t base, size_t size)
 {
 	int win;
diff --git a/include/linux/mbus.h b/include/linux/mbus.h
index dba482e31a13..9245b663e720 100644
--- a/include/linux/mbus.h
+++ b/include/linux/mbus.h
@@ -62,8 +62,14 @@ static inline const struct mbus_dram_target_info *mv_mbus_dram_info(void)
 int mvebu_mbus_add_window_remap_flags(const char *devname, phys_addr_t base,
 				      size_t size, phys_addr_t remap,
 				      unsigned int flags);
+int mvebu_mbus_add_window_remap_by_id(unsigned int target,
+				      unsigned int attribute,
+				      phys_addr_t base, size_t size,
+				      phys_addr_t remap);
 int mvebu_mbus_add_window(const char *devname, phys_addr_t base,
 			  size_t size);
+int mvebu_mbus_add_window_by_id(unsigned int target, unsigned int attribute,
+				phys_addr_t base, size_t size);
 int mvebu_mbus_del_window(phys_addr_t base, size_t size);
 int mvebu_mbus_init(const char *soc, phys_addr_t mbus_phys_base,
 		    size_t mbus_size, phys_addr_t sdram_phys_base,