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[PATCH v4 03/23] drivers/fsi: Add empty master scan

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From: Jeremy Kerr <jk@ozlabs.org>

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>
---
 drivers/fsi/fsi-core.c | 25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c
index 2f19509..e90d45d 100644
--- 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);
 
-- 
1.8.2.2

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[PATCH v4 00/23] FSI device driver implementation Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-03-29 19:50 +0200
  [PATCH v4 16/23] drivers/fsi: Add tracepoints for low-level operations Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-03-29 19:50 +0200
  [PATCH v4 10/23] drivers/fsi: Add device read/write/peek API Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-03-29 19:50 +0200
  [PATCH v4 22/23] drivers/fsi: Add hub master support Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-03-29 19:50 +0200
  [PATCH v4 12/23] drivers/fsi: Add documentation for GPIO bindings Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-03-29 19:50 +0200
    Re: [PATCH v4 12/23] drivers/fsi: Add documentation for GPIO bindings Rob Herring <robh@kernel.org> - 2017-04-03 17:30 +0200
  [PATCH v4 05/23] drivers/fsi: Add slave & master read/write APIs Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-03-29 19:50 +0200
  [PATCH v4 18/23] drivers/fsi: Document FSI master sysfs files in ABI Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-03-29 19:50 +0200
  [PATCH v4 01/23] drivers/fsi: Add fsi master definition Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-03-29 19:50 +0200
  [PATCH v4 07/23] drivers/fsi: Implement slave initialisation Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-03-29 19:50 +0200
  [PATCH v4 20/23] drivers/fsi/gpio: Add tracepoints for GPIO master Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-03-29 19:50 +0200
  [PATCH v4 13/23] drivers/fsi: Add client driver register utilities Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-03-29 19:50 +0200
  [PATCH v4 14/23] drivers/fsi: Add sysfs files for FSI master & slave accesses Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-03-29 19:50 +0200
  [PATCH v4 15/23] drivers/fsi: expose direct-access slave API Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-03-29 19:50 +0200
  [PATCH v4 04/23] drivers/fsi: Add crc4 helpers Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-03-29 20:00 +0200
  [PATCH v4 02/23] drivers/fsi: Add slave definition Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-03-29 20:00 +0200
  [PATCH v4 08/23] drivers/fsi: Set slave SMODE to init communication Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-03-29 20:00 +0200
  [PATCH v4 03/23] drivers/fsi: Add empty master scan Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-03-29 20:00 +0200

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