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drivers/fsi: Add empty master scan

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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>
This commit is contained in:
Jeremy Kerr 2017-06-06 16:08:38 -05:00 committed by Greg Kroah-Hartman
parent faf0b116de
commit 414c102631
1 changed files with 23 additions and 2 deletions
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25
drivers/fsi/fsi-core.c
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@ -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);