Soundwire: intel_init: save Slave(s) _ADR info in sdw_intel_ctx

Save ACPI information in context so that we can match machine driver
with sdw _ADR matching tables.

Suggested-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200716150947.22119-10-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/soundwire/intel_init.c b/drivers/soundwire/intel_init.c
index 8d3992f..047252a 100644 (file)
--- a/drivers/soundwire/intel_init.c
+++ b/drivers/soundwire/intel_init.c
@@ -188,7 +188,11 @@ static struct sdw_intel_ctx
        struct sdw_intel_link_res *link;
        struct sdw_intel_ctx *ctx;
        struct acpi_device *adev;
+       struct sdw_slave *slave;
+       struct list_head *node;
+       struct sdw_bus *bus;
        u32 link_mask;
+       int num_slaves = 0;
        int count;
        int i;
 
@@ -265,6 +269,26 @@ static struct sdw_intel_ctx
                link->cdns = platform_get_drvdata(pdev);
 
                list_add_tail(&link->list, &ctx->link_list);
+               bus = &link->cdns->bus;
+               /* Calculate number of slaves */
+               list_for_each(node, &bus->slaves)
+                       num_slaves++;
+       }
+
+       ctx->ids = devm_kcalloc(&adev->dev, num_slaves,
+                               sizeof(*ctx->ids), GFP_KERNEL);
+       if (!ctx->ids)
+               goto err;
+
+       ctx->num_slaves = num_slaves;
+       i = 0;
+       list_for_each_entry(link, &ctx->link_list, list) {
+               bus = &link->cdns->bus;
+               list_for_each_entry(slave, &bus->slaves, node) {
+                       ctx->ids[i].id = slave->id;
+                       ctx->ids[i].link_id = bus->link_id;
+                       i++;
+               }
        }
 
        return ctx;