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Subject[PATCH v2 2/5] soundwire: bus_type: introduce sdw_slave_type and sdw_master_type
Date
From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

this is a preparatory patch before the introduction of the
sdw_master_type. The SoundWire slave support is slightly modified with
the use of a sdw_slave_type, and the uevent handling move to
slave.c (since it's not necessary for the master).

No functionality change other than moving code around.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
---
drivers/soundwire/bus_type.c | 19 +++++++++++++------
drivers/soundwire/slave.c | 8 +++++++-
include/linux/soundwire/sdw_type.h | 9 ++++++++-
3 files changed, 28 insertions(+), 8 deletions(-)

diff --git a/drivers/soundwire/bus_type.c b/drivers/soundwire/bus_type.c
index 17f096dd6806..2c1a19caba51 100644
--- a/drivers/soundwire/bus_type.c
+++ b/drivers/soundwire/bus_type.c
@@ -33,13 +33,21 @@ sdw_get_device_id(struct sdw_slave *slave, struct sdw_driver *drv)

static int sdw_bus_match(struct device *dev, struct device_driver *ddrv)
{
- struct sdw_slave *slave = dev_to_sdw_dev(dev);
- struct sdw_driver *drv = drv_to_sdw_driver(ddrv);
+ struct sdw_slave *slave;
+ struct sdw_driver *drv;
+ int ret = 0;
+
+ if (is_sdw_slave(dev)) {
+ slave = dev_to_sdw_dev(dev);
+ drv = drv_to_sdw_driver(ddrv);

- return !!sdw_get_device_id(slave, drv);
+ ret = !!sdw_get_device_id(slave, drv);
+ }
+ return ret;
}

-int sdw_slave_modalias(const struct sdw_slave *slave, char *buf, size_t size)
+static int sdw_slave_modalias(const struct sdw_slave *slave, char *buf,
+ size_t size)
{
/* modalias is sdw:m<mfg_id>p<part_id> */

@@ -47,7 +55,7 @@ int sdw_slave_modalias(const struct sdw_slave *slave, char *buf, size_t size)
slave->id.mfg_id, slave->id.part_id);
}

-static int sdw_uevent(struct device *dev, struct kobj_uevent_env *env)
+int sdw_slave_uevent(struct device *dev, struct kobj_uevent_env *env)
{
struct sdw_slave *slave = dev_to_sdw_dev(dev);
char modalias[32];
@@ -63,7 +71,6 @@ static int sdw_uevent(struct device *dev, struct kobj_uevent_env *env)
struct bus_type sdw_bus_type = {
.name = "soundwire",
.match = sdw_bus_match,
- .uevent = sdw_uevent,
};
EXPORT_SYMBOL_GPL(sdw_bus_type);

diff --git a/drivers/soundwire/slave.c b/drivers/soundwire/slave.c
index aace57fae7f8..ed068a004bd9 100644
--- a/drivers/soundwire/slave.c
+++ b/drivers/soundwire/slave.c
@@ -14,6 +14,12 @@ static void sdw_slave_release(struct device *dev)
kfree(slave);
}

+struct device_type sdw_slave_type = {
+ .name = "sdw_slave",
+ .release = sdw_slave_release,
+ .uevent = sdw_slave_uevent,
+};
+
static int sdw_slave_add(struct sdw_bus *bus,
struct sdw_slave_id *id, struct fwnode_handle *fwnode)
{
@@ -41,9 +47,9 @@ static int sdw_slave_add(struct sdw_bus *bus,
id->class_id, id->unique_id);
}

- slave->dev.release = sdw_slave_release;
slave->dev.bus = &sdw_bus_type;
slave->dev.of_node = of_node_get(to_of_node(fwnode));
+ slave->dev.type = &sdw_slave_type;
slave->bus = bus;
slave->status = SDW_SLAVE_UNATTACHED;
init_completion(&slave->enumeration_complete);
diff --git a/include/linux/soundwire/sdw_type.h b/include/linux/soundwire/sdw_type.h
index aaa7f4267c14..52eb66cd11bc 100644
--- a/include/linux/soundwire/sdw_type.h
+++ b/include/linux/soundwire/sdw_type.h
@@ -5,6 +5,13 @@
#define __SOUNDWIRE_TYPES_H

extern struct bus_type sdw_bus_type;
+extern struct device_type sdw_slave_type;
+extern struct device_type sdw_master_type;
+
+static inline int is_sdw_slave(const struct device *dev)
+{
+ return dev->type == &sdw_slave_type;
+}

#define drv_to_sdw_driver(_drv) container_of(_drv, struct sdw_driver, driver)

@@ -14,7 +21,7 @@ extern struct bus_type sdw_bus_type;
int __sdw_register_driver(struct sdw_driver *drv, struct module *owner);
void sdw_unregister_driver(struct sdw_driver *drv);

-int sdw_slave_modalias(const struct sdw_slave *slave, char *buf, size_t size);
+int sdw_slave_uevent(struct device *dev, struct kobj_uevent_env *env);

/**
* module_sdw_driver() - Helper macro for registering a Soundwire driver
--
2.17.1
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