From: Jeremy Kerr <jk@xxxxxxxxxx>
When a new fsi master is added, we will need to scan its links, and
slaves attached to those links. This change introduces a little shell to
iterate the links, which we will populate with the actual slave scan in
a later change.
Signed-off-by: Jeremy Kerr <jk@xxxxxxxxxx>
Signed-off-by: Chris Bostic <cbostic@xxxxxxxxxx>
---
drivers/fsi/fsi-core.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c
index 78d9c558..3160c1c 100644
--- a/drivers/fsi/fsi-core.c
+++ b/drivers/fsi/fsi-core.c
@@ -20,6 +20,8 @@
#include "fsi-master.h"
+#define FSI_N_SLAVES 4
+
static DEFINE_IDA(master_ida);
struct fsi_slave {
@@ -31,8 +33,29 @@ struct fsi_slave {
#define to_fsi_slave(d) container_of(d, struct fsi_slave, dev)
+/* FSI slave support */
+static int fsi_slave_init(struct fsi_master *master,
+ int link, uint8_t slave_id)
+{
+ /* todo: initialise slave device, perform engine scan */
+
+ return -ENODEV;
+}
+
/* FSI master support */
+static int fsi_master_scan(struct fsi_master *master)
+{
+ int link, slave_id;
+
+ for (link = 0; link < master->n_links; link++)
+ for (slave_id = 0; slave_id < FSI_N_SLAVES; slave_id++)
+ fsi_slave_init(master, link, slave_id);
+
+ return 0;
+
+}
+
int fsi_master_register(struct fsi_master *master)
{
if (!master || !master->dev)
@@ -40,6 +63,7 @@ int fsi_master_register(struct fsi_master *master)
master->idx = ida_simple_get(&master_ida, 0, 0, GFP_KERNEL);
get_device(master->dev);
+ fsi_master_scan(master);
return 0;
}
EXPORT_SYMBOL_GPL(fsi_master_register);
--
1.8.2.2
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