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Date: Wed, 29 Mar 2017 12:43:20 -0500 From: Christopher Bostic <cbostic@...ux.vnet.ibm.com> To: robh+dt@...nel.org, mark.rutland@....com, linux@...linux.org.uk, rostedt@...dmis.org, mingo@...hat.com, gregkh@...uxfoundation.org, devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org Cc: Jeremy Kerr <jk@...abs.org>, joel@....id.au, linux-kernel@...r.kernel.org, andrew@...id.au, alistair@...ple.id.au, benh@...nel.crashing.org, Chris Bostic <cbostic@...ux.vnet.ibm.com> Subject: [PATCH v4 03/23] drivers/fsi: Add empty master scan From: Jeremy Kerr <jk@...abs.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@...abs.org> Signed-off-by: Chris Bostic <cbostic@...ux.vnet.ibm.com> Signed-off-by: Joel Stanley <joel@....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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