drivers/fsi: Add empty master scan

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@ozlabs.org>
Signed-off-by: Chris Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c
index 2f19509..e90d45d 100644 (file)
--- a/drivers/fsi/fsi-core.c
+++ b/drivers/fsi/fsi-core.c
@@ -32,7 +32,25 @@ 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 id)
+{
+       /* todo: initialise slave device, perform engine scan */
+
+       return -ENODEV;
+}
+
 /* FSI master support */
+static int fsi_master_scan(struct fsi_master *master)
+{
+       int link;
+
+       for (link = 0; link < master->n_links; link++)
+               fsi_slave_init(master, link, 0);
+
+       return 0;
+}
+
 int fsi_master_register(struct fsi_master *master)
 {
        int rc;
@@ -44,10 +62,13 @@ int fsi_master_register(struct fsi_master *master)
        dev_set_name(&master->dev, "fsi%d", master->idx);
 
        rc = device_register(&master->dev);
-       if (rc)
+       if (rc) {
                ida_simple_remove(&master_ida, master->idx);
+               return rc;
+       }
 
-       return rc;
+       fsi_master_scan(master);
+       return 0;
 }
 EXPORT_SYMBOL_GPL(fsi_master_register);