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Message-Id: <20190916212342.12578-7-pierre-louis.bossart@linux.intel.com>
Date: Mon, 16 Sep 2019 16:23:39 -0500
From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To: alsa-devel@...a-project.org
Cc: linux-kernel@...r.kernel.org, tiwai@...e.de, broonie@...nel.org,
vkoul@...nel.org, gregkh@...uxfoundation.org, jank@...ence.com,
srinivas.kandagatla@...aro.org, slawomir.blauciak@...el.com,
Bard liao <yung-chuan.liao@...ux.intel.com>,
Rander Wang <rander.wang@...ux.intel.com>,
Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
Sanyog Kale <sanyog.r.kale@...el.com>
Subject: [RFC PATCH 6/9] soundwire: add support for sdw_slave_type
Currently the bus does not have any explicit support for master
devices. Add explicit support for sdw_slave_type, so that in
follow-up patches we can add support for the sdw_md_type (md==Master
Device), following the Grey Bus example.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
---
drivers/soundwire/bus_type.c | 9 ++++++++-
drivers/soundwire/slave.c | 7 ++++++-
include/linux/soundwire/sdw_type.h | 6 ++++++
3 files changed, 20 insertions(+), 2 deletions(-)
diff --git a/drivers/soundwire/bus_type.c b/drivers/soundwire/bus_type.c
index 9407ebf30012..5df095f4e12f 100644
--- a/drivers/soundwire/bus_type.c
+++ b/drivers/soundwire/bus_type.c
@@ -49,9 +49,16 @@ int sdw_slave_modalias(const struct sdw_slave *slave, char *buf, size_t size)
static int sdw_uevent(struct device *dev, struct kobj_uevent_env *env)
{
- struct sdw_slave *slave = dev_to_sdw_dev(dev);
+ struct sdw_slave *slave;
char modalias[32];
+ if (is_sdw_slave(dev)) {
+ slave = to_sdw_slave_device(dev);
+ } else {
+ dev_warn(dev, "uevent for unknown Soundwire type\n");
+ return -EINVAL;
+ }
+
sdw_slave_modalias(slave, modalias, sizeof(modalias));
if (add_uevent_var(env, "MODALIAS=%s", modalias))
diff --git a/drivers/soundwire/slave.c b/drivers/soundwire/slave.c
index 40e41796a499..89854ae8414f 100644
--- a/drivers/soundwire/slave.c
+++ b/drivers/soundwire/slave.c
@@ -14,6 +14,11 @@ static void sdw_slave_release(struct device *dev)
kfree(slave);
}
+struct device_type sdw_slave_type = {
+ .name = "sdw_slave",
+ .release = sdw_slave_release,
+};
+
static int sdw_slave_add(struct sdw_bus *bus,
struct sdw_slave_id *id, struct fwnode_handle *fwnode)
{
@@ -34,9 +39,9 @@ static int sdw_slave_add(struct sdw_bus *bus,
bus->link_id, id->mfg_id, id->part_id,
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;
slave->dev_num = 0;
diff --git a/include/linux/soundwire/sdw_type.h b/include/linux/soundwire/sdw_type.h
index 7d4bc6a979bf..c681b3426478 100644
--- a/include/linux/soundwire/sdw_type.h
+++ b/include/linux/soundwire/sdw_type.h
@@ -5,6 +5,12 @@
#define __SOUNDWIRE_TYPES_H
extern struct bus_type sdw_bus_type;
+extern struct device_type sdw_slave_type;
+
+static inline int is_sdw_slave(const struct device *dev)
+{
+ return dev->type == &sdw_slave_type;
+}
#define to_sdw_slave_driver(_drv) \
container_of(_drv, struct sdw_driver, driver)
--
2.20.1
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