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| author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2020-05-19 04:35:51 +0800 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-05-20 17:22:41 +0530 |
| commit | bcac59029955ae57d3c660a0a1d6d4c7ae78fb49 (patch) | |
| tree | d1ed29a40b4a6a59760fce57ce394e0154d7dc57 /drivers/soundwire/bus_type.c | |
| parent | c5778ca49a19420c67dbeff0744a3b3b75ef4e1a (diff) | |
| download | linux-bcac59029955ae57d3c660a0a1d6d4c7ae78fb49.tar.bz2 | |
soundwire: add Slave sysfs support
Expose MIPI DisCo Slave properties in sysfs.
For Slave properties and Data Port 0, the attributes are managed with
simple devm_ support.
A Slave Device may have more than one Data Port (DPN), and each Data
Port can be sink or source. The attributes are created dynamically
using pre-canned macros, but still use devm_ with a name attribute
group to avoid creating kobjects - as requested by GregKH. In the
_show function, we use container_of() to retrieve port number and
direction required to extract the information.
Audio modes are not supported for now. Depending on the discussions
the SoundWire Device Class, we may add it later as is or follow the
new specification.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20200518203551.2053-4-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/soundwire/bus_type.c')
| -rw-r--r-- | drivers/soundwire/bus_type.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/soundwire/bus_type.c b/drivers/soundwire/bus_type.c index 2c1a19caba51..de9a671802b8 100644 --- a/drivers/soundwire/bus_type.c +++ b/drivers/soundwire/bus_type.c @@ -7,6 +7,7 @@ #include <linux/soundwire/sdw.h> #include <linux/soundwire/sdw_type.h> #include "bus.h" +#include "sysfs_local.h" /** * sdw_get_device_id - find the matching SoundWire device id @@ -46,8 +47,7 @@ static int sdw_bus_match(struct device *dev, struct device_driver *ddrv) return ret; } -static int sdw_slave_modalias(const struct sdw_slave *slave, char *buf, - size_t size) +int sdw_slave_modalias(const struct sdw_slave *slave, char *buf, size_t size) { /* modalias is sdw:m<mfg_id>p<part_id> */ @@ -105,6 +105,11 @@ static int sdw_drv_probe(struct device *dev) if (slave->ops && slave->ops->read_prop) slave->ops->read_prop(slave); + /* init the sysfs as we have properties now */ + ret = sdw_slave_sysfs_init(slave); + if (ret < 0) + dev_warn(dev, "Slave sysfs init failed:%d\n", ret); + /* * Check for valid clk_stop_timeout, use DisCo worst case value of * 300ms |