diff options
| author | Pierre-Louis Bossart | 2019-08-05 19:55:16 -0500 |
|---|---|---|
| committer | Vinod Koul | 2019-08-21 14:36:02 +0530 |
| commit | 085f4ace103dc81163d5fa6298b94e87c7ec2082 (patch) | |
| tree | b1fdd77d818f69c5f3991b042d4d472b68d081d4 /drivers | |
| parent | 82fc8d06501a0694bfb1ada8ba69372cbc297fb9 (diff) | |
soundwire: intel: read mclk_freq property from firmware
The BIOS provides an Intel-specific property, let's use it to avoid
hard-coded clock dividers.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190806005522.22642-12-pierre-louis.bossart@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/soundwire/intel.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c index 716e4e47228c..b3aeaf1fad66 100644 --- a/drivers/soundwire/intel.c +++ b/drivers/soundwire/intel.c @@ -808,11 +808,37 @@ static int intel_register_dai(struct sdw_intel *sdw) dais, num_dai); } +static int sdw_master_read_intel_prop(struct sdw_bus *bus) +{ + struct sdw_master_prop *prop = &bus->prop; + struct fwnode_handle *link; + char name[32]; + int nval, i; + + /* Find master handle */ + snprintf(name, sizeof(name), + "mipi-sdw-link-%d-subproperties", bus->link_id); + + link = device_get_named_child_node(bus->dev, name); + if (!link) { + dev_err(bus->dev, "Master node %s not found\n", name); + return -EIO; + } + + fwnode_property_read_u32(link, + "intel-sdw-ip-clock", + &prop->mclk_freq); + return 0; +} + static int intel_prop_read(struct sdw_bus *bus) { /* Initialize with default handler to read all DisCo properties */ sdw_master_read_prop(bus); + /* read Intel-specific properties */ + sdw_master_read_intel_prop(bus); + return 0; } |