[PATCH 8/8] soundwire: intel_init: save Slave(s) _ADR info in sdw_intel_ctx

[Pierre-Louis Bossart]

From: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>

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

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@xxxxxxxxxxxxxxx>
Signed-off-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
---
 drivers/soundwire/intel_init.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/soundwire/intel_init.c b/drivers/soundwire/intel_init.c
index 91ec91127f2a..60d6d844ee4a 100644
--- a/drivers/soundwire/intel_init.c
+++ b/drivers/soundwire/intel_init.c
@@ -74,6 +74,8 @@ static int sdw_intel_cleanup(struct sdw_intel_ctx *ctx)
 
 	kfree(ctx->links);
 	ctx->links = NULL;
+	kfree(ctx->ids);
+	ctx->ids = NULL;
 
 	return 0;
 }
@@ -188,7 +190,11 @@ static struct sdw_intel_ctx
 	struct acpi_device *adev;
 	struct sdw_master_device *md;
 	unsigned long time;
+	struct sdw_slave *slave;
+	struct list_head *node;
+	struct sdw_bus *bus;
 	u32 link_mask;
+	int num_slaves = 0;
 	int count;
 	int i;
 
@@ -261,6 +267,25 @@ static struct sdw_intel_ctx
 		link->md = md;
 
 		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 = kcalloc(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;
-- 
2.20.1