From mboxrd@z Thu Jan 1 00:00:00 1970 From: christopher.lee.bostic@gmail.com Subject: [PATCH v2 05/18] drivers/fsi: Add empty master scan Date: Thu, 12 Jan 2017 16:26:26 -0600 Message-ID: <1484259986-79248-1-git-send-email-christopher.lee.bostic@gmail.com> Return-path: Sender: linux-kernel-owner@vger.kernel.org To: robh+dt@kernel.org, mark.rutland@arm.com, linux@armlinux.org.uk, gregkh@linuxfoundation.org, mturquette@baylibre.com, geert+renesas@glider.be, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, joel@jms.id.au, jk@ozlabs.org, linux-kernel@vger.kernel.org, andrew@aj.id.au, alistair@popple.id.au, benh@kernel.crashing.org Cc: Chris Bostic List-Id: devicetree@vger.kernel.org From: Jeremy Kerr 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 Signed-off-by: Chris Bostic --- 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