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Subject[PATCH v3 03/18] drivers/fsi: add driver to device matches
Date
From: Jeremy Kerr <jk@ozlabs.org>

Driver bind to devices based on the engine types & (optional) versions.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Chris Bostic <cbostic@us.ibm.com>
---
drivers/fsi/fsi-core.c | 21 +++++++++++++++++++++
include/linux/fsi.h | 21 +++++++++++++++++++--
2 files changed, 40 insertions(+), 2 deletions(-)

diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c
index 3e45306..3d55bd5 100644
--- a/drivers/fsi/fsi-core.c
+++ b/drivers/fsi/fsi-core.c
@@ -19,8 +19,29 @@

/* FSI core & Linux bus type definitions */

+static int fsi_bus_match(struct device *dev, struct device_driver *drv)
+{
+ struct fsi_device *fsi_dev = to_fsi_dev(dev);
+ struct fsi_driver *fsi_drv = to_fsi_drv(drv);
+ const struct fsi_device_id *id;
+
+ if (!fsi_drv->id_table)
+ return 0;
+
+ for (id = fsi_drv->id_table; id->engine_type; id++) {
+ if (id->engine_type != fsi_dev->engine_type)
+ continue;
+ if (id->version == FSI_VERSION_ANY ||
+ id->version == fsi_dev->version)
+ return 1;
+ }
+
+ return 0;
+}
+
struct bus_type fsi_bus_type = {
.name = "fsi",
+ .match = fsi_bus_match,
};
EXPORT_SYMBOL_GPL(fsi_bus_type);

diff --git a/include/linux/fsi.h b/include/linux/fsi.h
index f73886a..273cbf6 100644
--- a/include/linux/fsi.h
+++ b/include/linux/fsi.h
@@ -18,11 +18,28 @@
#include <linux/device.h>

struct fsi_device {
- struct device dev;
+ struct device dev;
+ u8 engine_type;
+ u8 version;
};

+struct fsi_device_id {
+ u8 engine_type;
+ u8 version;
+};
+
+#define FSI_VERSION_ANY 0
+
+#define FSI_DEVICE(t) \
+ .engine_type = (t), .version = FSI_VERSION_ANY,
+
+#define FSI_DEVICE_VERSIONED(t, v) \
+ .engine_type = (t), .version = (v),
+
+
struct fsi_driver {
- struct device_driver drv;
+ struct device_driver drv;
+ const struct fsi_device_id *id_table;
};

#define to_fsi_dev(devp) container_of(devp, struct fsi_device, dev)
--
1.8.2.2
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