[PATCH v3 06/18] drivers/fsi: Add empty master scan
From: Christopher Bostic <hidden>
Date: 2017-02-01 16:55:27
Also in:
linux-arm-kernel, lkml
Subsystem:
fsi subsystem, the rest · Maintainers:
Eddie James, Linus Torvalds
From: Jeremy Kerr <redacted> 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 <redacted> Signed-off-by: Chris Bostic <cbostic-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org> --- 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
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