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Subject[PATCH 9/9] Soundwire: intel_init: save Slave(s) _ADR info in sdw_intel_ctx
Date
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>
---
drivers/soundwire/intel_init.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)

diff --git a/drivers/soundwire/intel_init.c b/drivers/soundwire/intel_init.c
index eff4e385bb59..6502a5e82229 100644
--- 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;
--
2.17.1
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